2020-04-21 Tracking News

Contents on 21 April '20

IAU Minor Planet Center
- NEOCP Activity -- 137 listings
- New MPECs -- sixteen MPECs
Observers -- 123 observers
Impact Risk Monitoring -- four objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood traffic page
Ephemerides for risk-listed objects & close passers
News archive (old) & news image catalog (discontinued)
Object Links - mainly for radar targets & close passers (mostly discontinued)
Observing Campaigns (old)

The latest A/CC news is available via framed access, RSS news feed, or redirection.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. To keep track of what's new each day, watch the Chronology section.

NEOCP Activity on 21 April '20

The MPC's NEO Confirmation Page has 137 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 137 objects listed. Of these, 77 were "one nighters." The Tracking News counted a total of 161 listings on the NEOCP on this day.

New MPECs on 21 April '20

Minor Planet Electronic Circulars

There were sixteen MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2020-H63 time-stamped "00:39 UT" - 2019 AK54 - see below
MPEC 2020-H64 time-stamped "00:44 UT" - 2020 HW1 - see below
MPEC 2020-H65 time-stamped "00:46 UT" - 2020 HX1 - see below
MPEC 2020-H66 time-stamped "00:47 UT" - 2020 HY1 - see below
MPEC 2020-H67 time-stamped "06:11 UT" - Observations and Orbits of Comets and A/ Objects - see below
MPEC 2020-H68 time-stamped "10:36 UT" - 2020 HB2 - see below
MPEC 2020-H69 time-stamped "10:38 UT" - 2020 HC2 - see below
MPEC 2020-H70 time-stamped "10:40 UT" - 2020 HD2 - see below
MPEC 2020-H71 time-stamped "10:50 UT" - 2020 HE2 - see below
MPEC 2020-H72 time-stamped "11:46 UT" - 2005 VY3 - see below
MPEC 2020-H73 time-stamped "11:50 UT" - 2020 HF2 - see below
MPEC 2020-H74 time-stamped "11:52 UT" - 2020 HG2 - see below
MPEC 2020-H75 time-stamped "11:54 UT" - 2020 HH2 - see below
MPEC 2020-H76 time-stamped "11:55 UT" - 2020 HJ2 - see below
MPEC 2020-H77 time-stamped "12:05 UT" - Daily Orbit Update - see below
MPEC 2020-H78 time-stamped "22:07 UT" - Reports of Suspected Cometary Activity

MPEC 2020-H78 - "22:07 UT" - Reports of Suspected Cometary Activity

<< DOU on 21 April '20 >> MPEC 2020-H77 - "12:05 UT" - Daily Orbit Update

Observations of risk-listed objects
K20G03A 2020 GA3 (small asteroid, arc=3 days, H=25.1 ~32m, close passer) from Pan-STARRS 2 (PS2) (April 17.61p2)
K20G02Y 2020 GY2 (small asteroid, arc=6 days, H=23.7 ~62m) from Guidestar Obs. (April 20.98-00p3) and Steward Obs. Mt. Lemmon Station (April 21.44p4)
K20G02V 2020 GV2 (small asteroid, Q=4.285 AU, arc=5 days, H=26.6 ~16m, close passer) from Pan-STARRS 1 (PS1) (April 20.42-45p4)
Observations of recently (no longer) risk-listed objects
K20F06M 2020 FM6 (almost small, arc=26 days, H=21.9 ~141m) from ATLAS Mauna Loa (April 20.47-49p4) and program code 1 via Kitab Obs. (April 20.83p4)
Observations of close-passing objects
K20H01B 2020 HB1 (arc=5 days, H=27.1 ~13m) from Steward Mt. Lemmon Sta. (April 21.41-42p3)
K20G02O 2020 GO2 (arc=10 days, H=26.3 ~19m, NHATS target) from the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (April 21.40-41p4)
K14J25O 2014 JO25 (q=0.234 AU, arc=5 opp, H=17.8 ~933m, radar support) from Rolling Hills Obs. (2017 April 21.09-14p7), ATLAS Mauna Loa (April 16.53-55p3 & 20.48-50p4), and ATLAS Haleakala (April 18.51-53p3)
c8945 388945 2008 TZ3 from the Catalina Sky Survey (CSS) (April 20.34-36p4), LCO McDonald Obs. (April 20.41-42p5), and ATLAS Haleakala (April 20.43-45p4)
Observation campaigns (NHATS targets, radar support)
K20H01S 2020 HS1 (arc=4 days, H=25.6 ~26m, NHATS) from Steward Mt. Lemmon Sta. (April 21.38p4 at G=20.9-22.1)
K20H00J 2020 HJ (arc=5 days, H=25.3 ~29m, NHATS) from Steward Mt. Lemmon Sta. (April 21.43-44p4)
K20F03D 2020 FD3 (arc=31 days, H=23.4 ~71m, NHATS) from Steward Mt. Lemmon Sta. (April 21.45p3)
K20C01J 2020 CJ1 (arc=90 days, H=23.8 ~59m, NHATS) from PS1 (April 20.54-57p3 at w=21.3-22.2)
K20B16R 2020 BR16 (arc=118 days, H=24.2 ~49m, NHATS) from PS2 (April 20.51-55p4)
K16F14T 2016 FT14 (arc=2 opp, H=24.8 ~37m, NHATS) from PS2 (April 20.46-48p2)
K06F36H 2006 FH36 (arc=3 opp, H=23.0 ~85m, NHATS) from ATLAS Mauna Loa (April 20.40-42p4)
J0166 190166 2005 UP156 (radar) from PS1 (April 20.31-33p2) and Foxfire Village Obs. (April 21.08-10p3)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small asteroids (H>22.0)
K20H01U 2020 HU1 (i=43.4°, arc=2 days, H=23.4 ~71m) from PS1 (April 21.25-29p3) and CSS (April 21.25-26p2)
K20H01J 2020 HJ1 (arc=4 days, H=24.4 ~45m) from PS1 (April 20.37-40p3 at w=21.69-22.14)
K20H00Y 2020 HY (arc=4 days, H=22.8 ~93m) from PS1 (April 20.49-53p3), Clixby Obs. (April 21.01-02p3), Dettelbach Vineyard Obs. (April 21.05-06p3), and Steward Mt. Lemmon Sta. (April 21.45p3)
K20H00U 2020 HU (arc=4 days, H=24.9 ~35m) from PS1 (April 20.36-40p6 at w=21.42-22.2)
K20H00M 2020 HM (arc=4 days, H=24.3 ~47m) from Mountainville Obs. (April 20.16p1 & 20.21p1), Dettelbach Vineyard Obs. (April 20.90-91p3), Great Shefford Obs. (April 20.92-93p3), and Steward Mt. Lemmon Sta. (April 21.18p4)
K20H00L 2020 HL (arc=5 days, H=25.0 ~34m) from Steward Mt. Lemmon Sta. (April 21.17-18p4)
K20H00G 2020 HG (arc=5 days, H=24.2 ~49m) from Steward Mt. Lemmon Sta. (April 21.23-24p2)
K20H00D 2020 HD (arc=5 days, H=24.5 ~43m) from Steward Mt. Lemmon Sta. (April 21.15p4)
K20G03C 2020 GC3 (arc=6 days, H=23.6 ~65m) from PS1 (April 20.55-58p3) and Steward Mt. Lemmon Sta. (April 21.39p3)
K20G02S 2020 GS2 (arc=9 days, H=23.0 ~85m) from Steward Mt. Lemmon Sta. (April 21.18p4)
K20G02M 2020 GM2 (arc=9 days, H=23.6 ~65m) from Steward Mt. Lemmon Sta. (April 21.19-20p4)
K20G02J 2020 GJ2 (Q=4.644 AU, arc=29 days, H=24.8 ~37m) from Northolt Branch Obs. (April 19.93-94p3) and Dettelbach Vineyard Obs. (April 21.09-10p3)
K20G00S 2020 GS (arc=18 days, H=23.7 ~62m) from PS1 (April 20.42-46p4)
K20F07A 2020 FA7 (arc=36 days, H=22.2 ~123m) from ATLAS Haleakala (April 20.31-34p4), Dettelbach Vineyard Obs. (April 20.88-89p3), and Walnut Creek Obs. (April 21.19-21p3)
K20F03A 2020 FA3 (arc=30 days, H=23.2 ~78m) from Dettelbach Vineyard Obs. (April 20.92-93p3)
K20F02O 2020 FO2 (arc=87 days, H=22.4 ~112m) from Dettelbach Vineyard Obs. (April 20.94-95p3) and Farpoint Obs. (April 21.30-31p5)
K20B01O 2020 BO1 (arc=10 days, H=22.1 ~129m) from SATINO-1 (Jan. 27.05p2)
K19Y02J 2019 YJ2 (Q=4.172 AU, arc=36 days, H=23.9 ~56m) from UH/Tholen NEO Follow-Up 2.24m Telescope (Jan. 25.38p1 at G=23.47)
K19X01L 2019 XL1 (arc=139 days, H=22.1 ~129m) from PS1 (April 20.37-41p4)
K19G03O 2019 GO3 (arc=2 opp, H=22.5 ~107m) from PS1 (April 21.25-28p4 at w=22.1-2)
K17U45C 2017 UC45 (arc=3 opp, H=22.1 ~129m) from CSS-Kuiper (April 21.47-48p4)
Observations of other objects
K20G03F 2020 GF3 (arc=17 days, H=19.7 ~389m) from ATLAS Haleakala (April 20.46-48p4) and Dettelbach Vineyard Obs. (April 20.99p3)
K20G02U 2020 GU2 (arc=8 days, H=21.4 ~178m) from Steward Mt. Lemmon Sta. (April 21.27-28p4)
K20G02Q 2020 GQ2 (arc=10 days, H=18.2 ~776m) from CSS-Kuiper (April 21.19-20p4 at G=21.6-22.1)
K20G02D 2020 GD2 (arc=171 days, H=20.6 ~257m) from CSS (April 20.24-25p4), ATLAS Haleakala (April 20.44-47p4), Kitab Obs./code 1 (April 20.73p4), KLENOT (April 20.90p7), Dettelbach Vineyard Obs. (April 20.96-97p3), and Nonndorf Obs. (April 21.01-02p10)
K20G02B 2020 GB2 (q=0.117 AU, Q=4.559 AU, arc=23 days, H=21.1 ~204m) from PS1 (April 21.26-28p3)
K20F06F 2020 FF6 (arc=28 days, H=20.5 ~269m) from PS2 (April 20.51-53p3)
K20F06B 2020 FB6 (arc=27 days, H=20.6 ~257m) from ATLAS Haleakala (April 20.47-52p4) and Dettelbach Vineyard Obs. (April 21.07-08p3)
K20F05C 2020 FC5 (Q=4.362 AU, arc=27 days, H=20.4 ~282m) from iTelescope Obs. Siding Spring (April 18.56p1 & 18.62-65p2)
K20F03W 2020 FW3 (arc=30 days, H=21.3 ~186m) from Dettelbach Vineyard Obs. (April 21.00-01p3)
K20F01S 2020 FS1 (arc=35 days, H=21.1 ~204m) from PS1 (April 21.25-28p3 at w=21.5-22.5)
K20D05B 2020 DB5 (arc=51 days, H=19.3 ~467m) from PS1 (April 20.60-61p4)
K20D04M 2020 DM4 (arc=54 days, H=21.7 ~155m) from ATLAS Mauna Loa (April 20.40-41p4)
K20B05O 2020 BO5 (arc=91 days, H=21.0 ~214m) from ATLAS Mauna Loa (April 20.41-43p4)
K19X01G 2019 XG1 (Q=4.163 AU, arc=2 opp, H=19.2 ~490m) from ATLAS Haleakala (April 20.37-39p4) and PS2 (April 20.47-50p4)
K19P02E 2019 PE2 (arc=177 days, H=20.5 ~269m) from Tholen 2.24m (Jan. 25.66-67p3 at G=22.03-21)
K19J07D 2019 JD7 (arc=2 opp, H=21.7 ~155m) from PS2 (April 20.46-50p3)
K17F90E 2017 FE90 (arc=3 opp, H=19.6 ~407m) from Foxfire Village Obs. (April 21.12-13p3) and Farpoint Obs. (April 21.21-22p4)
K17E02S 2017 ES2 (arc=3 opp, H=19.4 ~446m) from ATLAS Mauna Loa (April 20.29-31p3)
K17B32E 2017 BE32 (arc=2 opp, H=19.4 ~446m) from WISE (April 17.72p1, 17.85p1 & 17.98p1)
K16O02Y 2016 OY2 (arc=4 opp, H=18.9 ~562m) from PS1 (April 20.37-41p4)
K16E84L 2016 EL84 (arc=3 opp, H=19.5 ~426m) from Steward Mt. Lemmon Sta. (April 21.45-46p3 at G=20.4-22.3)
K15TE3X 2015 TX143 (arc=6 opp, H=19.8 ~371m) from Petit Jean Mtn. South Obs. (PJMSO) (April 21.09-10p7)
K15O35L 2015 OL35 (Q=4.255 AU, arc=2 opp, H=18.1 ~812m) from the Mt. Lemmon Survey (MLS) (April 20.13-14p3)
K15FB8T 2015 FT118 (arc=3 opp, H=20.5 ~269m) from Farpoint Obs. (April 21.35-36p6)
K14WK1D 2014 WD201 (arc=4 opp, H=19.3 ~467m) from PS1 (April 20.60-61p4)
K13O05N 2013 ON5 (arc=5 opp, H=18.7 ~616m) from PS1 (April 20.48-52p3)
K12Q50E 2012 QE50 (arc=5 opp, H=18.9 ~562m) from PS1 (April 20.30-33p4)
K12J17S 2012 JS17 (arc=5 opp, H=21.0 ~214m) from PS1 (April 20.48-51p3 at w=21.9-22.1)
K12E02A 2012 EA2 (arc=4 opp, H=19.1 ~513m) from PS1 (April 20.30-34p4)
K11J13R 2011 JR13 (q=0.356 AU, arc=6 opp, H=19.5 ~426m) from PS1 (April 20.60-61p4)
K10JF3V 2010 JV153 (arc=3 opp, H=19.7 ~389m) from CSS-Kuiper (April 21.44-45p4)
K09W07Z 2009 WZ7 (arc=3 opp, H=19.8 ~371m) from Guidestar Obs. (April 21.02-05p3)
K07H82X 2007 HX82 (Q=4.101 AU, arc=3 opp, H=20.4 ~282m) from PS2 (April 20.51-54p4)
K06P17Y 2006 PY17 (arc=6 opp, H=19.2 ~490m) from PS1 (April 20.36-40p4)
K05UF7O 2005 UO157 (Q=4.494 AU, arc=4 opp, H=18.3 ~741m) from NEAT's USAF Haleakala telescope (2006 Feb. 12.59-60p2)
K03O03C 2003 OC3 (arc=6 opp, H=18.8 ~589m) from ATLAS Haleakala (April 20.53-55p4)
K03J14N 2003 JN14 (arc=3 opp, H=19.5 ~426m) from PS1 (April 20.38-41p3)
K01G02S 2001 GS2 (arc=3 opp, H=20.6 ~257m) from ATLAS Mauna Loa (April 20.42-45p4) and Foxfire Village Obs. (April 21.09p3)
K00L00K 2000 LK (q=0.121 AU, Q=4.247 AU, arc=5 opp, H=18.3 ~741m) from PS1 (April 20.31-34p3 at w=22.0-22.1)
r9940 539940 2017 HW1 from Northolt Branch Obs. (April 19.89p4) and Walnut Creek Obs. (April 21.25-26p3)
q4530 524530 2002 XC91 from ATLAS Haleakala (April 20.43-46p4)
p9354 519354 2011 KR12 from PS1 (April 20.38-41p4)
p3125 513125 1997 GC32 from PS1 (April 20.30-34p4)
p0262 510262 2011 HJ61 from PS1 (April 20.45-46p2)
n4880 494880 2008 SQ7 from ATLAS Haleakala (April 20.40-42p4)
n2143 492143 2013 OE from WISE (April 17.52p1, 17.59p1, 17.65p1, 17.85p1, 17.91p1, 17.98p1, 18.04p1, 18.11p1, 18.17p1, 18.63p1, 18.89p1 & 19.02p1)
l7524 477524 2010 EH43 from MLS (April 20.15-17p3)
l1240 471240 2011 BT15 from PS1 (April 20.32-33p2 at w=21.8-22.2)
j5591 455591 2004 SV26 from PS1 (April 20.37-41p4 at w=22.3)
j0185 450185 2001 WJ2 from PS1 (April 20.53-58p3)
h6324 436324 2010 GZ6 from ATLAS Haleakala (April 20.43-45p4)
h3992 433992 2000 HD74 from ATLAS Haleakala (April 20.44-46p4)
g5450 425450 2010 EV45 from ATLAS Haleakala (April 20.36-38p4)
f6231 416231 2003 AJ73 from MLS (April 20.13-15p4)
f3989 413989 2007 EL88 from Northolt Branch Obs. (April 19.90-91p4) and CSS (April 20.14-16p4)
c8838 388838 2008 EZ5 from Foxfire Village Obs. (April 21.08-11p3)
b3428 373428 1999 TC5 from Northolt Branch Obs. (April 19.91-92p3) and ATLAS Haleakala (April 20.33-35p4)
Y9063 349063 2006 XA from ATLAS Mauna Loa (April 20.59-61p4)
V8050 318050 2004 FC32 from ATLAS Haleakala (April 20.40-42p4)
U8899 308899 2006 SL198 from PS1 (April 20.48-52p4)
R6732 276732 2004 EV9 from MLS (April 20.20-21p4)
R6274 276274 2002 SS41 from ATLAS Haleakala (April 20.40-42p4)
O8926 248926 2006 WZ2 from MLS (April 20.16-18p4)
N7551 237551 2000 WQ19 from ATLAS Haleakala (April 20.40-41p4)
I5702 185702 1998 HK3 from PS2 (April 20.36-40p3)
I4990 184990 2006 KE89 from CSS (April 20.45-46p2) and ATLAS Haleakala (April 20.61-63p4)
H5729 175729 1998 BB10 from PS1 (April 20.55-59p3 at w=21.8-22.1)
G9675 169675 2002 JM97 from ATLAS Mauna Loa (April 20.55-57p3) and PS2 (April 20.56-60p3)
G3692 163692 2003 CY18 from MLS (April 20.22-23p3)
G2422 162422 2000 EV70 from PS1 (April 20.43-45p3)
F4589 154589 2003 MX2 from PS1 (April 20.42-46p4)
F2941 152941 2000 FM10 from PS1 (April 20.37-41p4)
E4861 144861 2004 LA12 from MLS (April 20.35-38p4)
E4411 144411 2004 EW9 from ATLAS Mauna Loa (April 20.34-37p4)
E2781 142781 2002 UM11 from PS2 (April 20.58-60p3)
E2555 142555 2002 TB58 from ATLAS Mauna Loa (April 20.35-38p4)
E1670 141670 2002 JS100 from PS2 (April 20.46-49p2)
D8524 138524 2000 OJ8 from PS1 (April 20.37-41p4)
D7064 137064 1998 WP5 from Northolt Branch Obs. (April 19.95-96p3), CSS (April 20.32-34p4), and SONEAR (April 21.10-11p3)
D6993 136993 1998 ST49 from MLS (April 20.22-24p4)
D6923 136923 1998 JH2 from PS1 (April 20.42-45p4)
D6618 136618 1994 CN2 from PS1 (April 20.31-34p4)
B5052 115052 2003 RD6 from ATLAS Haleakala (April 20.29-31p4)
99935 99935 2002 AV4 from PS2 (April 20.42-45p4) and ATLAS Mauna Loa (April 20.44-46p4)
88264 88264 2001 KN20 from PS1 (April 20.60-61p4)
86667 86667 2000 FO10 from MASTER IAC Obs. (April 20.04p1 & 20.18p1)
68350 68350 2001 MK3 from ATLAS Haleakala (April 20.56-59p4)
68278 68278 2001 FC7 from CSS (April 20.26p1)
66251 66251 1999 GJ2 from MASTER IAC Obs. (April 20.02p1 & 20.15p1) and CSS (April 20.33-34p4)
54401 54401 2000 LM from ATLAS Mauna Loa (April 20.42-45p8)
54071 54071 2000 GQ146 from WISE (April 16.84p2, 17.04p1, 17.17p1, 17.23p1, 17.56p1, 17.62p1, 17.69p1, 17.82p1, 17.95p1 & 18.21p1)
53409 53409 1999 LU7 from PS1 (April 20.37-41p3 at w=22.0-22.4)
52768 52768 1998 OR2 from Wickede Obs. (April 19.84p6), CSS (April 20.17-18p4), ATLAS Haleakala (April 20.27-29p4), program code 1 via Kuban State Univ. Obs. (April 20.78-88p30), Nonndorf Obs. (April 20.86-90p8), Glyn Marsh Obs. (April 20.88-91p4), West Park Obs. (April 20.89-94p5), and Cordell-Lorenz Obs. (April 21.11-15p7)
40267 40267 1999 GJ4 from MLS (April 20.13-14p4), CSS (April 20.15-16p2), and ATLAS Haleakala (April 20.26-27p3)
39796 39796 1997 TD from PS1 (April 21.25-28p4)
36183 36183 1999 TX16 from PS2 (April 20.57-60p3)
35107 35107 1991 VH from CSS (April 20.19-21p4) and ATLAS Haleakala (April 20.36-38p4)
34613 34613 2000 UR13 from ATLAS Haleakala (April 20.25-27p4)
31345 31345 1998 PG from PS1 (April 20.36-40p4)
27031 27031 1998 RO4 from PS1 (April 20.60-61p4)
26760 26760 2001 KP41 from PS1 (April 21.26-29p4)
20826 20826 2000 UV13 from SONEAR (April 21.31-32p3)
18172 18172 2000 QL7 from ATLAS Haleakala (April 20.27-29p4)
18109 18109 2000 NG11 from PS1 (April 20.43-46p4)
08566 8566 1996 EN from ATLAS Haleakala (April 20.27-30p4)
08014 8014 1990 MF from ATLAS Mauna Loa (April 20.52-54p4)
07753 7753 1988 XB from CSS (April 20.33p2)
07358 7358 Oze (1995 YA3) from PS1 (April 20.30-33p4)
07088 7088 Ishtar (1992 AA) from ATLAS Haleakala (April 20.37-39p4)
06569 6569 Ondaatje (1993 MO) from ATLAS Haleakala (April 20.52-53p3)
06050 6050 Miwablock (1992 AE) from ATLAS Mauna Loa (April 20.52-55p4) and PS2 (April 20.55-59p4)
06047 6047 1991 TB1 from ATLAS Haleakala (April 20.26-29p3)
05693 5693 1993 EA from MLS (April 20.18-19p4)
05626 5626 1991 FE from ATLAS Haleakala (April 20.27-29p4)
04954 4954 Eric (1990 SQ) from ATLAS Mauna Loa (April 20.43-45p3)
04257 4257 Ubasti (1987 QA) from MLS (April 20.42-43p4)
01917 1917 Cuyo (1968 AA) from PS1 (April 20.48-52p3)
01685 1685 Toro (1948 OA) from ATLAS Mauna Loa (April 20.58-60p4)
01627 1627 Ivar (1929 SH) from MLS (April 20.13-15p4) and ATLAS Haleakala (April 20.26-29p4)

MPEC 2020-H76 - "11:55 UT" - 2020 HJ2

K20H02J 2020 HJ2 (small asteroid, Earth MOID=5.5 LD, H=24.7 ~39m) was picked up at 0953 UT on 19 April by MLS, observing it at April 19.41-43p3 and 21.45-46p4. This detection was confirmed by CSS-Kuiper (April 19.47-48p3), Schwarzschild Obs. (April 19.95p3 & 21.07-08p4), Great Shefford Obs. (April 20.10-13p3), Astronomical Research Obs. Westfield (April 20.36p2), and Steward Mt. Lemmon Sta. (April 21.34-35p4).

MPEC 2020-H75 - "11:54 UT" - 2020 HH2

K20H02H 2020 HH2 (small asteroid, H=22.9 ~89m) was picked up at 0930 UT on 18 April by MLS, observing it at April 18.40-41p3. This detection was confirmed by CSS-Kuiper (April 18.47-48p3 at G=21.4-22.4, 19.30-31p3 at G=21.1-4 & 21.46p4 at G=20.8-22.2), PS1 (April 18.60-62p3 & 19.58-59p2), ARO Westfield (April 19.29-30p3 at V=21.4-22.1), and Farpoint Obs. (April 21.38-40p4).

MPEC 2020-H74 - "11:52 UT" - 2020 HG2

K20H02G 2020 HG2 (borderline-small, i=43.3°, H=22.0 ~135m) was picked up at 0926 UT on 18 April by MLS, observing it at April 18.39-41p4. This detection was confirmed by CSS-Kuiper (April 18.46-47p4), Visnjan Obs. (April 19.08-09p4), Steward Mt. Lemmon Sta. (April 19.40p4 & 21.25-26p4), Schwarzschild Obs. (April 19.94p3 & 21.06p3), and KLENOT (April 20.98p2).

MPEC 2020-H73 - "11:50 UT" - 2020 HF2

K20H02F 2020 HF2 (small asteroid, H=23.7 ~62m) was picked up at 1314 UT on 18 April by PS1, observing it at April 18.55-58p3. This detection was confirmed by Visnjan Obs. (April 19.04p3), ARO Westfield (April 19.17-18p3), Schwarzschild Obs. (April 19.87-88p4 & 20.92p3), Steward Mt. Lemmon Sta. (April 21.26-27p4), and Farpoint Obs. (April 21.27-29p5).

MPEC 2020-H72 - "11:46 UT" - 2005 VY3

K05V03Y 2005 VY3 (H=20.0 ~339m) from PS1 (2016 Nov. 6.57-60p3 at G=22.3-9) and PS2 (March 22.62-64p2 & April 20.56-60p3)

MPEC 2020-H71 - "10:50 UT" - 2020 HE2

K20H02E 2020 HE2 (H=21.1 ~204m) was picked up at 1037 UT on 18 April by PS1, observing it at April 18.44-48p3. This detection was confirmed by Steward Mt. Lemmon Sta. (April 19.25-26p4 & 21.19p4), Dave Balam via Plaskett 1.8m Telescope (April 19.41-42p5), Schwarzschild Obs. (April 19.92-93p3 & 20.87-88p3), ARO Westfield (April 20.12-13p3), KLENOT (April 20.94p4), and MLS (April 21.31-32p4).

MPEC 2020-H70 - "10:40 UT" - 2020 HD2

K20H02D 2020 HD2 (small asteroid, H=23.0 ~85m) was picked up at 1041 UT on 17 April by PS2, observing it at April 17.45-48p3. This detection was confirmed by Visnjan Obs. (April 18.03-06p4), ARO Westfield (April 18.32-33p3 & 20.33p2), and CSS-Kuiper (April 18.35-36p4 at G=21.2-22.6 & 21.41-42p4 at G=21.3-9).

MPEC 2020-H69 - "10:38 UT" - 2020 HC2

K20H02C 2020 HC2 (small asteroid, H=22.1 ~129m) was picked up at 0917 UT on 17 April by PS1, observing it at April 17.39-42p4 at w=21.48-76, 18.40-43p4 at G=21.2-22.1, and 21.25-28p4 at w=21.32-76. This detection was confirmed by Steward Mt. Lemmon Sta. (April 18.16-17p3), CSS-Kuiper (April 19.32-33p2 & 21.20-21p4), and Sandlot Obs. (April 21.13-16p3).

MPEC 2020-H68 - "10:36 UT" - 2020 HB2

K20H02B 2020 HB2 (H=20.2 ~309m) was picked up at 1209 UT on 20 April by PS2, observing it at April 16.46-47p2, 18.42-43p2, and 20.51-54p4. This detection was confirmed by PS1 (April 20.47p2), KLENOT (April 20.97p3), ARO Westfield (April 21.25-26p4), and Steward Mt. Lemmon Sta. (April 21.29-30p4).

<< OOC on 21 April '20 -- MPEC 2020-H67 - "06:11 UT" - Observations and Orbits of Comets and A/ Objects

PK20G010 P/2020 G1 (Pimentel) (q=0.508 AU, Q=7.897 AU, TP=2028 Nov. 1.27348 TT) from Geisei Obs. (April 16.46p2), Montelupo Obs. (April 16.80p2), and Cordell-Lorenz Obs. (April 17.06-10p5)
CK20F080 C/2020 F8 (SWAN) (i=111.0°, q=0.432 AU, TP=2020 May 27.35780 TT) from Gisborne Obs. (April 13.61-71p44 & 14.64-71p34), iTelObs-SSO (April 13.77p6 & 14.80-81p16), Swan Hill Obs. (April 13.78-79p6 & 16.79-80p6), LCO Siding Spring A (April 13.79-80p8), Auger Obs. (April 14.42-43p4), Cruz del Sur Obs. (April 15.37-39p6 & 17.37-39p6), SADR Obs. (April 15.39-41p9), program code "#" (12) via Slooh.com Chile Obs. (April 16.38-39p6), M. Kumrucu-Lohmiller via Slooh.com Chile Obs. (April 17.37-39p6), program code "%" (14) via Slooh.com Chile Obs. (April 17.40p12 & 18.37-39p6), Heaven's Mirror Obs. (April 17.78-80p6), and B. Lutkenhoner via Slooh.com Chile Obs. (April 18.37-41p5)
AK20F070 A/2020 F7 (i=94.0°, q=5.332 AU, Q=1383.916 AU, TP=2021 Nov. 14.01260 TT) from the Zwicky Transient Facility (ZTF) (Feb. 19.26p2, 19.32p1 & 20.32-36p2), Ametlla del Valles Obs. (April 4.86-89p6), Buchloe Obs. (April 11.87p3), and PS1 (April 18.31-35p4)
CK20F060 C/2020 F6 (Panstarrs) (i=174.6°, q=3.524 AU, TP=2020 Apr. 16.34402 TT) from MLS (April 16.34-35p3)
CK20F050 C/2020 F5 (Master) (i=51.7°, q=4.321 AU, TP=2021 Mar. 24.90402 TT) from SADR Obs. (April 15.36-39p7) and Cruz del Sur Obs. (April 17.11-16p3)
PK20F040 P/2020 F4 (Panstarrs) (q=2.742 AU, Q=5.937 AU, TP=2010 Nov. 12.81001 TT)
CK20F030 C/2020 F3 (Neowise) (i=128.9°, q=0.296 AU, Q=1088.298 AU, TP=2020 July 3.72217 TT) from Geisei Obs. (April 10.45p2 & 14.44-45p2), Gisborne Obs. (April 11.37-42p12), Swan Hill Obs. (April 11.42-43p4 & 16.41-42p4), iTelObs-SSO (April 13.45-46p2), Perth Obs. (April 13.50-51p2 & 16.54-55p2), Geyserland Obs. (April 14.30-35p5), Hidetaka Sato via iTelescope Obs. Siding Spring (April 14.36p2), ATLAS Mauna Loa (April 16.23-26p4), and Blue Mountains Obs. (April 16.47-48p2)
CK20F020 C/2020 F2 (ATLAS) (i=163.6°, q=8.816 AU, TP=2022 July 15.78535 TT) from program code 2 via Himalayan Chandra Telescope (March 25.97-98p9), program code "'" (16) via iTelescope Obs. Siding Spring (March 27.68-72p3), Tacande Obs. (April 1.14-15p5), MLS (April 16.44-46p4), and ATLAS Mauna Loa (April 16.55-57p4)
PK20F010 P/2020 F1 (Leonard) (q=3.970 AU, Q=9.579 AU, TP=2037 June 5.95056 TT) from PS1 (March 22.47-51p4 & 23.46-48p3)
CK20B030 C/2020 B3 (Rankin) (q=3.345 AU, Q=3526.344 AU, TP=2019 Oct. 19.87358 TT) from ATLAS Mauna Loa (April 13.43-45p4 & 17.36-39p4), MLS (April 15.19-21p4), SADR Obs. (April 15.26-27p2), PS2 (April 17.30-33p4), ATLAS Haleakala (April 19.37-39p4), and EHB01 Obs. (April 19.82-83p2)
CK20B020 C/2020 B2 (Lemmon) (i=55.7°, q=2.770 AU, Q=137.834 AU, TP=2020 Jan. 26.82718 TT) from PS1 (April 16.36-38p3)
AK20B010 A/2020 B1 (q=1.748 AU, Q=102.467 AU, TP=2019 Dec. 25.93712 TT)
CK20A030 C/2020 A3 (ATLAS) (i=146.7°, q=5.769 AU, TP=2019 June 29.63113 TT)
CK20A020 C/2020 A2 (Iwamoto) (i=120.8°, q=0.978 AU, Q=2236.831 AU, TP=2020 Jan. 8.32381 TT) from Ageo Obs. (April 4.50-51p2)
AK20A010 A/2020 A1 (i=149.0°, q=1.671 AU, Q=50.256 AU, TP=2019 Dec. 2.78168 TT, H=18.0 ~851m)
AK19Y050 A/2019 Y5 (i=82.8°, q=4.914 AU, Q=1599.450 AU, TP=2019 Aug. 18.17777 TT)
CK19Y04d C/2019 Y4-D (ATLAS) (i=45.4°, q=0.252 AU, Q=63.673 AU, TP=2020 May 31.15483 TT) from Schmelz Obs. (April 10.90-94p2), Gravina Obs. (April 11.77-78p3), Starry Wanderer Obs. (April 11.81-82p6), Sencelles Obs. (April 11.83p1), Vulpecula Obs. (April 11.83p1, 14.79-83p2 & 14.87p1), Cardiff Obs. (April 11.84p1 & 11.99p1), Glyn Marsh Obs. (April 11.87p1), Sant Pere Obs. (April 11.87p1 & 14.88-89p2), Maisoncelles Obs. (April 11.88-90p4), Carpe Noctem Obs. (April 12.85p2), Costa Teguise Obs. (April 12.90p3), Chelmsford Obs. (April 14.86-88p2), Northolt Branch Obs. (April 14.92p2, 15.93-95p5 & 16.92-93p2), KLENOT (April 15.80p1), and program code 2 via Slooh.com Canary Islands Obs. (April 16.99-00p5)
CK19Y04c C/2019 Y4-C (ATLAS) (i=43.9°, q=0.259 AU, Q=39.825 AU, TP=2020 May 31.04956 TT) from Slooh.com CIO/code 2 (April 9.87-88p4 & 17.00p1), Geisei Obs. (April 10.47p3), BSCR Obs. (April 10.85-86p2), iTelescope Obs. Mayhill (April 11.19p4, 12.18p3 & 17.17p2), Kurihara Obs. (April 11.46-47p3), Gravina Obs. (April 11.77-78p2), Vulpecula Obs. (April 11.78p1, 11.84-88p3 & 17.79p1), Dettelbach Vineyard Obs. (April 11.81-83p3), Brignoles Obs. (April 11.81-85p2 & 11.91p1), Sencelles Obs. (April 11.81-87p7), Terrassa Obs. (April 11.82p1 & 11.88p2), Kant Obs. (April 11.83-85p2), Olmen Obs. (April 11.83-88p3 & 17.87-88p2), Buchloe Obs. (April 11.83-84p6), Baldone Obs. (April 11.83-84p3 & 15.80p1), Koksijde Obs. (April 11.84-86p3), Cardiff Obs. (April 11.84-85p2 & 11.99p2), Chante-Perdrix Obs. (April 11.84-87p3), Brixiis Obs. (April 11.85-88p3, 16.92p1 & 17.85-88p3), Costa Teguise Obs. (April 11.86-87p3), Sant Pere Obs. (April 11.87-88p2), Blanes Obs. (April 11.87-88p3), Kiev Comet Station (April 11.89-90p14), Glyn Marsh Obs. (April 11.89-90p2), Northolt Branch Obs. (April 11.91-92p3 & 16.92-93p4), Maisoncelles Obs. (April 11.91p1), program code ">" (39) via iTelescope Obs. Mayhill (April 12.17-18p3), Carpe Noctem Obs. (April 12.85p1), Al Sadeem Obs. (April 14.67-73p5, 16.67-72p5 & 17.66-68p2), KLENOT (April 15.80p4), Spica Obs. (April 15.83-84p4), PJMSO (April 16.09p2), Oberfrauendorf Obs. (April 16.81-85p4), San Vito Obs. (April 16.82-85p3), and Zuben Obs. (April 17.84-85p2)
CK19Y04b C/2019 Y4-B (ATLAS) (i=45.3°, q=0.253 AU, Q=369.322 AU, TP=2020 May 31.02059 TT) from Schmelz Obs. (April 6.84p1 & 6.91p1), Hirao Obs. (April 7.46-49p3), Kurihara Obs. (April 7.46-47p3), Schiaparelli Obs. (April 8.85-90p3 & 10.85-86p2), Geisei Obs. (April 9.47-49p3), Great Shefford Obs. (April 11.85-87p2), Corner Obs. (April 11.90-91p2, 13.88p1 & 15.87p1), Cardiff Obs. (April 13.98p1), Al Sadeem Obs. (April 14.69p1), Masquefa Obs. (April 14.81-84p2 & 14.88p1), San Vito Obs. (April 14.81-82p3 & 15.82p3), Carmelita Obs. (April 14.83p1), 29PREMOTE Obs. (April 14.83-85p3), El Manzanillo Obs. (April 14.84-85p3 & 15.83-84p2), Montcabre Obs. (April 14.84-85p2), Olmen Obs. (April 14.85p1 & 16.84p1), Oberfrauendorf Obs. (April 14.85-88p3), Brixiis Obs. (April 14.87p1, 15.87-90p4, 16.87-89p3 & 18.85p1), Koksijde Obs. (April 14.88-90p3), Blanes Obs. (April 14.88p1), Sant Pere Obs. (April 14.89p1), Sencelles Obs. (April 14.90-95p6), Baldone Obs. (April 15.80-81p5), KLENOT (April 15.80p4), Collonges Obs. (April 15.81-85p2), Brignoles Obs. (April 15.82-84p2), Chante-Perdrix Obs. (April 15.84p1), and Northolt Branch Obs. (April 15.93-95p3)
CK19Y04a C/2019 Y4-A (ATLAS) from Kelmis Obs. (March 23.83-84p2, 24.84-85p2, 26.82-83p2, 27.81-82p2, April 1.85-88p2, 3.84-85p2 & 4.83p2), North Obs. (March 23.90-91p5), Montseny Obs. (March 26.80-85p14, 28.84-86p7 & April 3.90-95p11), Blanes Obs. (April 4.89p3 & 14.88-89p2), Schiaparelli Obs. (April 9.85-89p4, 10.87-88p2 & 11.90-94p4), Chelmsford Obs. (April 9.86-88p2 & 10.89p1), Chante-Perdrix Obs. (April 10.82-83p2, 11.85-86p2, 14.83-84p3, 15.84-85p2, 16.83p3 & 18.83-84p3), Olmen Obs. (April 12.83-89p4, 13.84-91p4, 14.87-89p2, 16.87-91p2 & 17.86-95p5), Deokheung Obs. (April 13.53-58p9), Brixiis Obs. (April 13.82-87p5, 14.86-91p3, 15.93p1, 17.86p1 & 18.85-87p3), Cardiff Obs. (April 13.85-86p3 & 13.97-98p2), Corner Obs. (April 13.89p1, 14.90-91p2 & 15.87p1), Costa Teguise Obs. (April 13.90-91p3), Tarbatness Obs. (April 13.90-93p2, 16.99-00p4 & 17.89-90p3), Corona Borealis Obs. (April 14.63-67p4), San Vito Obs. (April 14.81p1), Carmelita Obs. (April 14.81-85p2), Brignoles Obs. (April 14.81-85p3, 15.82p1 & 18.82-85p3), PASTIS Obs. (April 14.82-83p3), Montcabre Obs. (April 14.86p1), St. Saturnin les Avignon Obs. (April 14.89-90p3), Sencelles Obs. (April 14.90-91p2), iTelObs-Mayhill (April 15.17p3 & 17.17p1), El Manzanillo Obs. (April 15.84p1 & 17.84-85p3), Baldone Obs. (April 16.82-83p7), Al Sadeem Obs. (April 17.67-73p4), Vulpecula Obs. (April 17.80-85p3), Zuben Obs. (April 17.83-85p3), Carpe Noctem Obs. (April 18.86p3), and Clixby Obs. (April 19.94-95p3)
CK19Y040 C/2019 Y4 (ATLAS) (i=45.4°, q=0.253 AU, Q=178.873 AU, TP=2020 May 31.03336 TT)
PK19Y020 P/2019 Y2 (Fuls) (q=2.183 AU, Q=4.802 AU, TP=2026 July 25.38439 TT) from Sato/iTelObs-SSO (Feb. 28.73p2), Castelmartini Obs. (April 11.03-04p3, 11.99p3, 15.97-98p3 & 17.00-01p3), Buchloe Obs. (April 11.95p3), CSS (April 12.28-30p4 & 17.24-26p4), ATLAS Mauna Loa (April 13.45-47p4), Olmen Obs. (April 14.94-95p5), MLS (April 15.24-26p4), Glyn Marsh Obs. (April 16.02-03p2), PS1 (April 16.51-52p2), Tarbatness Obs. (April 18.08p3), Hiratsuka Obs. (April 18.53-54p2), and ATLAS Haleakala (April 19.40-42p4)
CK19Y010 C/2019 Y1 (ATLAS) (i=73.3°, q=0.838 AU, Q=449.983 AU, TP=2020 Mar. 15.56459 TT) from Chante-Perdrix Obs. (April 11.81-83p3 & 15.81-82p3), Cardiff Obs. (April 12.12-16p6 & 14.12-16p6), Carpe Noctem Obs. (April 13.88-91p3), Montcabre Obs. (April 15.15-17p3), Vulpecula Obs. (April 15.80-88p3 & 17.85-89p3), Glyn Marsh Obs. (April 16.99-01p2), Tarbatness Obs. (April 17.06-11p5, 17.99-00p4 & 18.95p5), and Brixiis Obs. (April 18.92-95p4)
PK19X010 P/2019 X1 (Pruyne) (q=4.326 AU, Q=8.082 AU, TP=2034 Dec. 12.45691 TT)
PK19V020 P/2019 V2 (Groeller) (Centaur, q=5.034 AU, Q=10.118 AU, TP=2041 May 4.98313 TT)
CK19V010 C/2019 V1 (Borisov) (i=61.9°, q=3.097 AU, Q=5049.506 AU, TP=2020 July 16.56666 TT)
CK19U060 C/2019 U6 (Lemmon) (i=61.0°, q=0.914 AU, Q=859.871 AU, TP=2020 June 18.82385 TT) from Geyserland Obs. (April 11.29-31p7 & 14.28-30p6), Swan Hill Obs. (April 11.39-41p3 & 16.40p4), Perth Obs. (April 13.47-48p2), Sato/iTelObs-SSO (April 14.36-37p2), iTelObs-SSO (April 18.38p2), and Slooh.com Chile/code "%" (14) (April 18.98p6)
AK19U050 A/2019 U5 (i=113.5°, q=3.623 AU, TP=2023 Mar. 29.56448 TT)
PK19T060 P/2019 T6 (Panstarrs) (q=2.053 AU, Q=8.822 AU, TP=2032 July 22.17659 TT)
PK19T050 P/2019 T5 (ATLAS) (Centaur, q=1.527 AU, Q=14.486 AU, TP=2042 Mar. 31.41929 TT)
CK19T040 C/2019 T4 (ATLAS) (i=53.6°, q=4.243 AU, Q=1992.630 AU, TP=2022 June 9.16529 TT) from ATLAS Mauna Loa (April 12.23-25p4 & 16.24-26p4)
CK19T030 C/2019 T3 (ATLAS) (i=121.9°, q=5.946 AU, Q=6951.428 AU, TP=2021 Mar. 2.70325 TT)
CK19S040 C/2019 S4 (Lemmon) (i=92.0°, q=3.442 AU, Q=475.695 AU, TP=2020 Apr. 7.94551 TT)
AK19O040 A/2019 O4 (i=115.1°, q=3.645 AU, Q=62.091 AU, TP=2020 Feb. 9.95490 TT, H=15.5 ~2.69 km)
AK19O030 A/2019 O3 (i=89.8°, q=8.820 AU, TP=2021 Mar. 7.80075 TT) from ATLAS Mauna Loa (April 18.58-60p4)
AK19O020 A/2019 O2 (i=93.3°, q=9.682 AU, Q=106.241 AU, TP=2023 Apr. 7.37255 TT)
CK19N010 C/2019 N1 (ATLAS) (i=82.4°, q=1.705 AU, Q=94697.501 AU, TP=2020 Dec. 1.79372 TT) from Yatsuka Obs. (April 10.52p3), Olmen Obs. (April 11.89-90p3), Nonndorf Obs. (April 11.95-99p8), Carpe Noctem Obs. (April 13.89-92p3), Tarbatness Obs. (April 14.00-01p3, 18.04-05p4 & 19.09-10p4), and ATLAS Haleakala (April 17.60-61p4)
CK19L030 C/2019 L3 (ATLAS) (i=48.4°, q=3.554 AU, TP=2022 Jan. 9.60758 TT)
CK19K080 C/2019 K8 (ATLAS) (i=93.2°, q=3.195 AU, Q=3592.520 AU, TP=2019 July 21.28939 TT)
CK19K070 C/2019 K7 (Smith) (i=103.5°, q=4.475 AU, TP=2020 June 16.87873 TT) from Ageo Obs. (April 10.77p2), Castelmartini Obs. (April 16.12p3 & 17.14p3), and CSS (April 19.45-47p4)
AK19K060 A/2019 K6 (i=132.4°, q=3.929 AU, Q=3037.927 AU, TP=2020 May 20.16496 TT) from Sato/iTelObs-SSO (March 20.78p2), MLS (April 16.34-36p3), EHB01 Obs. (April 16.99p2), and ATLAS Haleakala (April 18.50-52p4)
CK19K050 C/2019 K5 (Young) (q=2.035 AU, Q=306.332 AU, TP=2019 June 22.78797 TT)
CK19K010 C/2019 K1 (ATLAS) (i=87.1°, q=2.013 AU, Q=24937.324 AU, TP=2020 Feb. 12.97077 TT)
CK19J030 C/2019 J3 (ATLAS) (i=131.4°, q=2.374 AU, Q=3390973.198 AU, TP=2019 Aug. 1.88134 TT)
AK19G040 A/2019 G4 (i=138.4°, q=5.859 AU, TP=2018 Sept. 15.82050 TT)
AK19G020 A/2019 G2 (i=159.2°, q=2.291 AU, Q=1444.366 AU, TP=2019 Dec. 10.05227 TT)
CK19F020 C/2019 F2 (ATLAS) (Centaur, q=2.259 AU, Q=31.805 AU, TP=2087 Apr. 11.78260 TT)
CK19F010 C/2019 F1 (ATLAS-Africano) (i=54.2°, q=3.596 AU, TP=2021 June 22.84658 TT) from ATLAS Mauna Loa (April 12.54-57p4 & 16.49-51p4), Olmen Obs. (April 14.92-94p4), Purple Mtn. Obs. Xuyi Station (April 15.75-78p3), MLS (April 16.32-33p4), Blue Mountains Obs. (April 16.70-75p3), Vicksburg Obs. (April 17.34-36p5), ATLAS Haleakala (April 18.46-49p4), and Hiratsuka Obs. (April 18.57p2)
CK19E030 C/2019 E3 (ATLAS) (i=84.3°, q=10.313 AU, Q=16165.543 AU, TP=2023 Nov. 15.26585 TT)
CK19D010 C/2019 D1 (Flewelling) (q=1.578 AU, Q=277.742 AU, TP=2019 May 11.86771 TT)
CK19C010 C/2019 C1 (ATLAS) (i=36.0°, q=6.581 AU, Q=1617.846 AU, TP=2020 May 5.71769 TT) from Kurihara Obs. (March 23.49-50p3), ATLAS Mauna Loa (April 12.41-43p4 & 16.43-45p4), Hiratsuka Obs. (April 14.52-53p3), Blue Mountains Obs. (April 16.49-51p2), and ATLAS Haleakala (April 18.30-33p4)
CK19B030 C/2019 B3 (Panstarrs) (i=66.5°, q=6.823 AU, TP=2021 Jan. 20.01319 TT) from SADR Obs. (April 15.08-09p7)
PK19A020 P/2019 A2 (ATLAS) (q=3.537 AU, Q=7.911 AU, TP=2032 July 21.35988 TT)
CK18Y010 C/2018 Y1 (Iwamoto) (i=160.4°, q=1.286 AU, Q=286.422 AU, TP=2019 Feb. 7.04051 TT)
CK18W020 C/2018 W2 (Africano) (i=116.6°, q=1.455 AU, TP=2019 Sept. 5.71901 TT) from Kelmis Obs. (2019 Aug. 30.89p1, 2019 Aug. 30.96p1, 2019 Sept. 5.92-93p2, 2019 Sept. 8.88-89p2 & 2019 Sept. 10.87-90p2), Groszschwabhausen Obs. (2019 Sept. 11.14p10, 2019 Sept. 17.99-01p20 & 2019 Sept. 18.91-92p20), and Sato/iTelObs-SSO (April 5.79-80p2)
CK18W010 C/2018 W1 (Catalina) (i=83.3°, q=1.361 AU, Q=42.194 AU, TP=2019 May 11.82742 TT)
AK18V030 A/2018 V3 (i=165.0°, Q=239.757 AU, TP=2019 Sept. 8.67975 TT) from Sato/iTelObs-SSO (Feb. 28.74p2), Buchloe Obs. (April 11.93-94p3), Compustar Obs. (April 14.96-99p2), and PS1 (April 18.55-58p4)
CK18U010 C/2018 U1 (Lemmon) (i=108.3°, q=4.993 AU, TP=2021 Nov. 3.08700 TT) from Castelmartini Obs. (April 11.15p3), Nonndorf Obs. (April 12.02-04p3), Vicksburg Obs. (April 17.43-45p4), and Tarbatness Obs. (April 19.12p3)
CK18R030 C/2018 R3 (Lemmon) (i=69.7°, q=1.290 AU, Q=3632.395 AU, TP=2019 June 7.19293 TT)
CK18N020 C/2018 N2 (ASASSN) (i=77.5°, q=3.125 AU, TP=2019 Nov. 10.96043 TT) from Starry Wanderer Obs. (April 11.95-97p8), Carpe Noctem Obs. (April 13.88-91p3), and Tarbatness Obs. (April 17.12-13p4 & 19.08-09p4)
CK18L020 C/2018 L2 (ATLAS) (i=67.4°, q=1.712 AU, Q=507.194 AU, TP=2018 Dec. 2.64865 TT)
CK18F040 C/2018 F4 (Panstarrs) (i=78.1°, q=3.440 AU, TP=2019 Dec. 4.12538 TT) from Swan Hill Obs. (April 11.38-39p3)
CK18D04O C/2018 DO4 (Lemmon) (i=160.5°, q=2.406 AU, Q=49.160 AU, TP=2019 Aug. 18.36536 TT)
CK18A060 C/2018 A6 (Gibbs) (i=77.0°, q=3.017 AU, Q=27.696 AU, TP=2077 June 25.79967 TT) from Sato/iTelObs-SSO (April 5.80p2)
CK18A030 C/2018 A3 (ATLAS) (i=139.6°, q=3.276 AU, Q=988.706 AU, TP=2019 Jan. 12.76013 TT)
CK17Y020 C/2017 Y2 (Panstarrs) (i=128.4°, q=4.632 AU, TP=2020 Nov. 4.62127 TT) from ATLAS Mauna Loa (April 18.57-60p5)
CK17U070 C/2017 U7 (Panstarrs) (i=142.6°, q=6.420 AU, TP=2019 Sept. 13.30061 TT) from ATLAS Mauna Loa (April 12.59-61p4) and Blue Mountains Obs. (April 16.75-78p2)
CK17U040 C/2017 U4 (Panstarrs) (i=158.2°, q=7.723 AU, TP=2018 Sept. 24.15031 TT)
CK17T020 C/2017 T2 (Panstarrs) (i=57.2°, q=1.615 AU, Q=8031.800 AU, TP=2020 May 4.95334 TT) from Millau Obs. (March 28.85-90p3), Ageo Obs. (April 4.43-44p2), Yatsuka Obs. (April 10.49p3), Brixiis Obs. (April 11.82-84p3, 13.83-84p4, 14.83-85p4, 15.85-87p3 & 16.84-87p4), Blanes Obs. (April 11.82-83p5 & 14.82-83p3), Chante-Perdrix Obs. (April 11.83-84p3 & 15.82-83p3), Buchloe Obs. (April 11.84-85p6), Cardiff Obs. (April 11.85-90p6 & 13.91-93p9), Koksijde Obs. (April 11.87-88p3 & 14.91-93p3), Glyn Marsh Obs. (April 11.92-93p2, 13.91p1, 13.99p1, 15.93p1, 15.97p1 & 16.96-97p2), Clixby Obs. (April 11.96-97p5), Fushan Obs. (April 12.50p1, 12.55p1 & 14.51-53p2), Olmen Obs. (April 13.83-84p3 & 15.84-86p3), Carpe Noctem Obs. (April 13.89-92p3), Tarbatness Obs. (April 13.94-95p3, 17.03p4, 17.95-96p4 & 18.93-94p4), Brignoles Obs. (April 14.86-87p3), West Park Obs. (April 14.86-89p2), ROASTERR-1 (April 16.83-85p2), and Hobbs Obs. (April 18.09-12p2)
CK17S060 C/2017 S6 (Catalina) (i=152.9°, q=1.542 AU, TP=2018 Feb. 26.63518 TT)
PK17S050 P/2017 S5 (ATLAS) (q=2.170 AU, Q=4.166 AU, TP=2023 Mar. 19.44280 TT)
CK17O010 C/2017 O1 (ASASSN) (i=39.9°, q=1.496 AU, Q=714.032 AU, TP=2017 Oct. 14.74138 TT)
CK17M040 C/2017 M4 (ATLAS) (i=105.6°, q=3.252 AU, TP=2019 Jan. 17.88162 TT) from Blue Mountains Obs. (April 16.47-48p2)
CK17K020 C/2017 K2 (Panstarrs) (i=87.6°, q=1.797 AU, TP=2022 Dec. 19.66534 TT) from Dettelbach Vineyard Obs. (April 12.10p2), Tarbatness Obs. (April 14.02p3, 18.05-06p4 & 19.11p4), Vicksburg Obs. (April 15.38-40p4 & 17.38-41p4), Olmen Obs. (April 15.97-98p3), EHB01 Obs. (April 17.01-03p2), PS2 (April 17.54-58p4), and ATLAS Haleakala (April 17.59-61p4)
CK17B030 C/2017 B3 (LINEAR) (i=54.2°, q=3.922 AU, TP=2019 Feb. 2.63277 TT)
CK16X010 C/2016 X1 (Lemmon) (q=7.564 AU, Q=2770.242 AU, TP=2019 Apr. 29.08519 TT) from Sato/iTelObs-SSO (March 15.40-41p2)
CK16R020 C/2016 R2 (Panstarrs) (i=58.2°, q=2.603 AU, Q=1115.427 AU, TP=2018 May 9.32717 TT)
CK16Q020 C/2016 Q2 (Panstarrs) (i=109.4°, q=7.082 AU, TP=2021 May 11.89602 TT)
CK16N060 C/2016 N6 (Panstarrs) (i=105.8°, q=2.667 AU, Q=3485.530 AU, TP=2018 July 18.10634 TT)
CK16N040 C/2016 N4 (Master) (i=72.6°, q=3.198 AU, Q=4783.665 AU, TP=2017 Sept. 16.47255 TT)
CK16M010 C/2016 M1 (Panstarrs) (i=91.0°, q=2.212 AU, Q=8144.673 AU, TP=2018 Aug. 10.29634 TT)
CK16A010 C/2016 A1 (Panstarrs) (i=121.2°, q=5.325 AU, TP=2017 Nov. 22.90327 TT)
CK15X050 C/2015 X5 (Panstarrs) (i=124.3°, q=6.799 AU, TP=2017 Dec. 29.97576 TT)
CK15X01Y C/2015 XY1 (Lemmon) (i=148.9°, q=7.925 AU, TP=2018 Apr. 28.37827 TT)
CK15V010 C/2015 V1 (Panstarrs) (i=139.2°, q=4.268 AU, Q=6934.781 AU, TP=2017 Dec. 17.22137 TT)
CK15T020 C/2015 T2 (Panstarrs) (i=124.5°, q=6.934 AU, Q=4855.109 AU, TP=2017 May 18.75666 TT)
CK15O010 C/2015 O1 (Panstarrs) (i=127.2°, q=3.730 AU, TP=2018 Feb. 19.02351 TT)
CK15E61R C/2015 ER61 (Panstarrs) (q=1.042 AU, Q=935.625 AU, TP=2017 May 10.35449 TT)
CK15D030 C/2015 D3 (Panstarrs) (i=128.5°, q=8.148 AU, TP=2016 May 3.05813 TT)
PK15B010 P/2015 B1 (Panstarrs) (Centaur, q=5.995 AU, Q=12.884 AU, TP=2044 Nov. 15.65541 TT)
CK14W050 C/2014 W5 (Lemmon-Panstarrs) (i=145.6°, q=2.408 AU, Q=204.950 AU, TP=2016 Feb. 8.55067 TT)
CK14R030 C/2014 R3 (Panstarrs) (i=90.9°, q=7.276 AU, Q=16307.481 AU, TP=2016 Aug. 8.75104 TT)
CK14O04E C/2014 OE4 (Panstarrs) (i=81.3°, q=6.248 AU, TP=2016 Dec. 12.57431 TT)
CK14B010 C/2014 B1 (Schwartz) (q=9.556 AU, Q=70331.056 AU, TP=2017 Sept. 9.77467 TT) from Olmen Obs. (April 11.94-95p2), ATLAS Haleakala (April 12.38-41p4), PS2 (April 16.30-34p3), and ATLAS Mauna Loa (April 18.37-38p4)
CK11K36P C/2011 KP36 (Spacewatch) (q=4.879 AU, Q=72.644 AU, TP=2016 May 27.25642 TT)
CK10U030 C/2010 U3 (Boattini) (i=55.5°, q=8.445 AU, Q=5402.398 AU, TP=2019 Feb. 26.20270 TT) from Modra Obs. (April 10.06-07p2), Olmen Obs. (April 11.90-91p3), and Tarbatness Obs. (April 18.09p3)
CK10M010 C/2010 M1 (Gibbs) (i=116.5°, q=8.002 AU, Q=2171.981 AU, TP=2010 Dec. 8.76708 TT)
CK10A040 C/2010 A4 (Siding Spring) (i=96.6°, q=2.721 AU, Q=563.180 AU, TP=2010 Oct. 10.84645 TT)
0392P 392P/LINEAR (2004 WR9) (q=2.055 AU, Q=10.941 AU, TP=2035 June 22.35801 TT) from MLS (April 17.12-13p4)
0388P 388P/Gibbs (2007 T4) (q=2.006 AU, Q=8.501 AU, TP=2031 July 28.83831 TT)
0380P 380P/Panstarrs (2019 G1) (q=2.996 AU, Q=5.951 AU, TP=2028 Aug. 3.19616 TT)
0378P 378P/McNaught (2005 Y2) (q=3.348 AU, Q=9.153 AU, TP=2036 June 23.24826 TT)
0377P 377P/Scotti (2003 L1) (q=5.169 AU, Q=8.368 AU, TP=2038 Apr. 24.30796 TT) from MLS (April 16.32-34p4) and PS1 (April 19.42-50p8)
0376P 376P/LONEOS (2005 GF8) (q=2.770 AU, Q=8.681 AU, TP=2033 June 25.35667 TT) from MLS (April 18.49-50p4)
0358P 358P/Panstarrs (2012 T1) (q=2.395 AU, TP=2023 Nov. 10.86060 TT)
0302P 302P/Lemmon-Panstarrs (2007 RJ236) (q=3.289 AU, Q=5.247 AU, TP=2025 Mar. 9.42089 TT)
0296P 296P/Garradd (2007 H3) (q=1.775 AU, Q=5.147 AU, TP=2027 Mar. 20.53639 TT) from Sato/iTelObs-SSO (April 14.50-51p2)
0284P 284P/McNaught (2007 H1) (q=2.296 AU, Q=5.063 AU, TP=2021 Sept. 12.71290 TT) from PS1 (April 17.59-61p4)
0278P 278P/McNaught (2006 K2) (q=1.965 AU, Q=5.235 AU, TP=2027 Sept. 16.43368 TT) from Modra Obs. (March 30.99-01p3), Buchloe Obs. (April 11.95-96p3), CSS (April 12.30-32p4 & 13.34-35p4), ATLAS Mauna Loa (April 12.47-49p4 & 17.39-41p4), MLS (April 15.24-26p4), Olmen Obs. (April 16.94-95p3), ATLAS Haleakala (April 18.53-56p4 & 19.40-42p4), and PS1 (April 19.35-39p4)
0266P 266P/Christensen (2006 U5) from MLS (April 16.12-13p4)
0260P 260P/McNaught (2005 K3) (q=1.418 AU, Q=5.828 AU, TP=2026 Aug. 5.00991 TT) from Kelmis Obs. (2019 Aug. 30.89p1, 2019 Aug. 30.99p1 & 2019 Sept. 5.89-92p2)
0257P 257P/Catalina (2005 JY126) from ATLAS Haleakala (April 19.59-62p4)
0249P 249P/LINEAR (2006 U1) (q=0.500 AU, Q=5.030 AU, TP=2025 Feb. 1.69537 TT) from ATLAS Mauna Loa (April 12.38-41p5, 13.37-39p4 & 17.31-33p4), CSS (April 13.21-22p3 & 17.19-21p4), EHB01 Obs. (April 14.87-88p2), Blue Mountains Obs. (April 16.49-50p2), Chante-Perdrix Obs. (April 16.86p2), PS1 (April 19.26-29p4), and ATLAS Haleakala (April 19.32-33p4)
0246P 246P/NEAT (2004 F3) (q=3.480 AU, Q=5.227 AU, TP=2029 Oct. 28.60008 TT) from Xuyi Sta. (April 9.57-59p3), Castelmartini Obs. (April 9.95-96p3, 10.99-01p3, 11.97p3, 15.94p3 & 16.96-97p3), Brixiis Obs. (April 11.88-89p3), Buchloe Obs. (April 11.92-93p3), ATLAS Haleakala (April 12.39-41p4), Brignoles Obs. (April 14.91-93p3), KLENOT (April 14.96p6), Vegaquattro Obs. (April 15.76-78p4 & 16.76-78p4), CSS (April 16.31-32p4), Tarbatness Obs. (April 18.07p4), Hiratsuka Obs. (April 18.51-52p3), and Foxfire Village Obs. (April 19.06-08p3)
0240P 240P/NEAT (2002 X2) from PS1 (April 18.55-58p4)
0231P 231P/LINEAR-NEAT (2003 CP7) from PS1 (April 17.59-61p3)
0228P 228P/LINEAR (2001 YX127) (q=3.418 AU, Q=4.906 AU, TP=2028 Sept. 6.21622 TT) from PS1 (April 18.32-35p4)
0223P 223P/Skiff (2002 S1) (q=2.429 AU, Q=5.886 AU, TP=2027 July 24.87729 TT)
0210P 210P/Christensen (2003 K2) from EHB01 Obs. (April 14.82p3, 16.83p2 & 19.83p2) and Chante-Perdrix Obs. (April 18.81-82p3)
0203P 203P/Korlevic (1999 WJ7) from MLS (April 16.12-13p4)
0173P 173P/Mueller (1993 W1) (q=4.250 AU, Q=7.259 AU, TP=2035 Aug. 29.20570 TT)
0163P 163P/NEAT (2004 V4) (q=2.055 AU, Q=5.465 AU, TP=2026 Nov. 24.02430 TT)
0162P 162P/Siding Spring (2004 TU12) (q=1.290 AU, Q=4.893 AU, TP=2026 May 17.84604 TT)
0159P 159P/LONEOS (2003 UD16) (q=3.636 AU, Q=8.127 AU, TP=2032 July 28.74975 TT)
0155P 155P/Shoemaker (1986 A1) from Kurihara Obs. (March 23.47p3), Castelmartini Obs. (April 10.97p2, 11.93-94p3, 15.90p3 & 16.92-93p3), Buchloe Obs. (April 11.89p3), Olmen Obs. (April 11.92p2), Tarbatness Obs. (April 13.99p3), Xuyi Sta. (April 15.52-56p3), PS1 (April 17.40-43p4), and ATLAS Mauna Loa (April 18.32-35p4)
0139P 139P/Vaisala-Oterma (1939 TN) (q=3.392 AU, Q=5.624 AU, TP=2027 July 23.55426 TT)
0137P 137P/Shoemaker-Levy (1990 UL3) (q=1.936 AU, Q=7.122 AU, TP=2028 July 29.69190 TT)
0124P 124P/Mrkos (1991 F1) (q=1.735 AU, Q=5.019 AU, TP=2026 June 23.59999 TT) from Castelmartini Obs. (April 10.94-95p3, 11.90-91p3, 15.86-87p3 & 16.88-89p3), Andrushivka Obs. (April 11.80-81p3), ATLAS Haleakala (April 12.32-38p3), Xuyi Sta. (April 12.56-58p3), ATLAS Mauna Loa (April 14.39-41p4 & 18.28-29p3), Hiratsuka Obs. (April 14.49p3), Brixiis Obs. (April 14.91-92p3), Collonges Obs. (April 15.86-89p2), Brignoles Obs. (April 15.87-89p3), Glyn Marsh Obs. (April 15.98p2), CSS (April 16.21-23p4), PS1 (April 17.30-34p3), and Hobbs Obs. (April 18.10-13p2)
0117P 117P/Helin-Roman-Alu (1989 T2) from ATLAS Haleakala (April 12.32-38p4), ATLAS Mauna Loa (April 14.40-41p4 & 18.33-35p4), Hiratsuka Obs. (April 14.50-51p2), Olmen Obs. (April 14.91-92p5), and PS1 (April 16.34-38p4)
0115P 115P/Maury (1985 Q1) from Sato/iTelObs-SSO (March 20.77p2)
0114P 114P/Wiseman-Skiff (1986 Y1) from Castelmartini Obs. (March 17.81-82p3, April 9.85p3, 10.84-85p3, 11.80-81p3, 15.80-81p3 & 16.82p3)
0112P 112P/Urata-Niijima (1986 UD) from Ageo Obs. (April 5.45-46p2)
0099P 99P/Kowal (1977 H2) (q=4.753 AU, Q=7.523 AU, TP=2037 May 6.45653 TT)
0091P 91P/Russell (1983 L1) from Sato/iTelObs-SSO (March 31.53p2), EHB01 Obs. (April 11.90-91p2), SADR Obs. (April 14.99-03p4), and MLS (April 16.16-18p4)
0088P 88P/Howell (1981 Q1) from Ageo Obs. (April 4.56-57p2), Yatsuka Obs. (April 10.51p3), Olmen Obs. (April 11.93-94p3), CSS (April 12.28-30p4, 13.34-36p4 & 17.24-25p4), Xuyi Sta. (April 12.64-66p3 & 15.63-66p3), ATLAS Mauna Loa (April 13.45-47p4 & 17.39-42p4), Hirao Obs. (April 14.51-52p2), Brignoles Obs. (April 14.88-90p3), Brixiis Obs. (April 14.93p3), MLS (April 15.24-26p4), Perth Obs. (April 16.53-56p2), Blue Mountains Obs. (April 16.54p1 & 16.75p1), Kitab Obs./code 1 (April 16.72p4), Hiratsuka Obs. (April 18.55-56p3), Chante-Perdrix Obs. (April 18.85-87p3), and ATLAS Haleakala (April 19.40-42p4)
0087P 87P/Bus (1981 E1) from Kurihara Obs. (March 23.54-55p3), CSS (April 12.28-30p4), PS2 (April 12.40-42p2), ATLAS Mauna Loa (April 13.44-46p4), Hirao Obs. (April 14.53-54p2), MLS (April 15.22-24p4), ROASTERR-1 (April 16.88-89p2), Hiratsuka Obs. (April 18.47-48p3), PS1 (April 19.36-40p4), and ATLAS Haleakala (April 19.38-40p4)
0078P 78P/Gehrels (1973 S1) from Castelmartini Obs. (March 17.97p2, April 10.89-90p3, 11.86-87p3, 15.84-85p3 & 16.85-86p3), Buchloe Obs. (April 11.85p3), Xuyi Sta. (April 12.52-55p3), ATLAS Mauna Loa (April 13.33-35p4, 18.26-29p4 & 19.34p5), and ATLAS Haleakala (April 19.28-34p9)
0058P 58P/Jackson-Neujmin (1936 S1) (q=1.438 AU, Q=6.838 AU, TP=1987 May 24.51851 TT) from Ageo Obs. (April 10.80-81p2), Sato/iTelObs-SSO (April 12.81p2), and Swan Hill Obs. (April 16.81p3)
0031P 31P/Schwassmann-Wachmann (1929 B1) from Olmen Obs. (April 16.92-93p2) and PS1 (April 17.39-43p4)
0029P 29P/Schwassmann-Wachmann (1927 V1) (q=5.708 AU, Q=6.116 AU, TP=2035 Feb. 13.48016 TT)
0028P 28P/Neujmin (1913 R2) (q=1.579 AU, Q=12.366 AU, TP=2039 July 23.38468 TT) from Woogaroo Obs. (April 11.71-73p3), SADR Obs. (April 15.30-35p6), ATLAS Mauna Loa (April 16.47-48p3), and ATLAS Haleakala (April 18.42-45p8)
0010P 10P/Tempel (1873 N1) from Brixiis Obs. (April 11.90-91p3), ATLAS Haleakala (April 12.39-40p3), Xuyi Sta. (April 13.59-63p3), SADR Obs. (April 15.22-24p2), Vegaquattro Obs. (April 15.78-80p4), CSS (April 16.31-32p4), and ATLAS Mauna Loa (April 18.34-36p4)
0002I 2I/Borisov (C/2019 Q4) (i=44.1°, q=2.007 AU, TP=2019 Dec. 8.55177 TT) from Teide Obs. (2019 Nov. 27.22-28p25, 2019 Nov. 28.21-26p7, 2019 Nov. 30.21-22p3 & 2019 Dec. 8.22-27p14) and Sato/iTelObs-SSO (April 14.51-52p3)

MPEC 2020-H66 - "00:47 UT" - 2020 HY1

K20H01Y 2020 HY1 (Earth MOID=1.8 LD, H=24.2 ~49m, NHATS) was picked up at 1255 UT on 17 April by PS1, observing it at April 17.54-56p3 and 19.47-51p4. This detection was confirmed by Visnjan Obs. (April 17.94-96p4), Schwarzschild Obs. (April 18.04p4 & 20.01p3), ARO Westfield (April 18.27-28p3), Steward Mt. Lemmon Sta. (April 18.38-39p2), and KLENOT (April 20.96p2).

MPEC 2020-H65 - "00:46 UT" - 2020 HX1

K20H01X 2020 HX1 (small asteroid, Earth MOID=1.4 LD, H=23.9 ~56m) was picked up at 0923 UT on 18 April by MLS, observing it at April 18.39-41p4. This detection was confirmed by Steward Mt. Lemmon Sta. (April 18.45-46p3 & 19.41p4), PS1 (April 18.60-62p3), Visnjan Obs. (April 19.07-08p4), ARO Westfield (April 19.22-23p5), and Schwarzschild Obs. (April 19.89p3 & 20.95-96p3).

MPEC 2020-H64 - "00:44 UT" - 2020 HW1

K20H01W 2020 HW1 (H=19.2 ~490m) was picked up at 0952 UT on 18 April by MLS, observing it at April 18.41-43p4. This detection was confirmed by PS1 (April 16.48p2, 18.60-62p4 & 19.59p2), Steward Mt. Lemmon Sta. (April 18.47p3 & 19.32p3), Schwarzschild Obs. (April 19.91-92p3), ARO Westfield (April 20.30-31p4), and Guidestar Obs. (April 20.87-90p3).

MPEC 2020-H63 - "00:39 UT" - 2019 AK54

K19A54K 2019 AK54 (Centaur, q=4.508 AU, Q=17.647 AU, H=14.7 ~3.89 km) was picked up at 1126 UT on 8 Jan. 2019 by PS1, observing it at 2018 Jan. 12.55-59p4 at G=22.8-23.6, 2018 Jan. 20.50-54p4 at G=22.2-23.3, 2018 Feb. 18.30-32p3 at G=21.5-23.0, 2019 Jan. 8.48-52p4 at G=22.0-22.4, and 2019 April 8.25-28p3 at G=21.7-8. This detection was confirmed by PS2 (2018 Nov. 14.62p1 at G=23.0 & April 10.51-55p4 at G=22.0-22.8), MLS (April 18.33-35p4), and Steward Mt. Lemmon Sta. (April 18.44-46p4 & 19.30-32p3).

Observers on 21 April '20

A total of 123 observers appeared in this day's MPECs.

Code	Observer / observatory
`L27`	29PREMOTE Obs., 1 in MPEC 2020-H67 -- C/2019 Y4-B
`349`	Ageo Obs. in Japan, 6 in MPEC 2020-H67 -- C/2020 A2, C/2019 K7, C/2017 T2, 112P, 88P, 58P
`M43`	Al Sadeem Obs. in Abu Dhabi, 3 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A
`B37`	Ametlla del Valles Obs. in Spain, 1 in MPEC 2020-H67 -- 2020 F7
`A50`	Andrushivka Obs. in Ukraine, 1 in MPEC 2020-H67 -- 124P
`H21`	Astronomical Research Obs. Westfield in Illinois, 9 in MPECs 2020-H64, 2020-H65, 2020-H66, 2020-H68, 2020-H70, 2020-H71, 2020-H73, 2020-H75 & 2020-H76 -- 2020 HY1, 2020 HX1, 2020 HW1, 2020 HJ2, 2020 HH2, 2020 HF2, 2020 HE2, 2020 HD2, 2020 HB2
`T05`	ATLAS Haleakala in Hawaii, 50 in MPECs 2020-H67 & 2020-H77 -- 2020 GF3, 2020 GD2, 2020 FB6, 2020 FA7, C/2020 B3, P/2019 Y2, 2019 XG1, C/2019 N1, 2019 K6, C/2019 F1, C/2019 C1, C/2017 K2, 2014 JO25, C/2014 B1, 2003 OC3, 68350, 52768, 524530, 494880, 436324, 433992, 425450, 40267, 388945, 373428, 35107, 34613, 318050, 276274, 237551, 184990, 18172, 115052, 8566, 7088, 6569, 6047, 5626, 1627, 278P, 257P, 249P, 246P, 124P, 117P, 88P, 87P, 78P, 28P, 10P
`T08`	ATLAS Mauna Loa in Hawaii, 38 in MPECs 2020-H67 & 2020-H77 -- 2020 FM6, C/2020 F3, C/2020 F2, 2020 DM4, 2020 BO5, C/2020 B3, P/2019 Y2, C/2019 T4, 2019 O3, C/2019 F1, C/2019 C1, C/2017 Y2, C/2017 U7, 2017 ES2, 2014 JO25, C/2014 B1, 2006 FH36, 2001 GS2, 99935, 54401, 349063, 169675, 144411, 142555, 8014, 6050, 4954, 1685, 278P, 249P, 155P, 124P, 117P, 88P, 87P, 78P, 28P, 10P
`I47`	Auger Obs. in Argentina, 1 in MPEC 2020-H67 -- C/2020 F8
`069`	Baldone Obs. in Latvia, 3 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A
`C86`	Blanes Obs. in Spain, 4 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A, C/2017 T2
`Q68`	Blue Mountains Obs. in New South Wales, 7 in MPEC 2020-H67 -- C/2020 F3, C/2019 F1, C/2019 C1, C/2017 U7, C/2017 M4, 249P, 88P
`G20`	Brignoles Obs., 7 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A, C/2017 T2, 246P, 124P, 88P
`B96`	Brixiis Obs. in Belgium, 9 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A, C/2019 Y1, C/2017 T2, 246P, 124P, 88P, 10P
`K47`	BSCR Obs., 1 in MPEC 2020-H67 -- C/2019 Y4-C
`215`	Buchloe Obs. in Germany, 9 in MPEC 2020-H67 -- 2020 F7, C/2019 Y4-C, P/2019 Y2, 2018 V3, C/2017 T2, 278P, 246P, 155P, 78P
`Z46`	Cardiff Obs., 6 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A, C/2019 Y1, C/2017 T2
`B20`	Carmelita Obs. in Spain, 2 in MPEC 2020-H67 -- C/2019 Y4-B, C/2019 Y4-A
`I72`	Carpe Noctem Obs. in Spain, 7 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-A, C/2019 Y1, C/2019 N1, C/2018 N2, C/2017 T2
`160`	Castelmartini Obs. in Italy, 8 in MPEC 2020-H67 -- P/2019 Y2, C/2019 K7, C/2018 U1, 246P, 155P, 124P, 114P, 78P
`703`	Catalina Sky Survey (CSS) in Arizona, 21 in MPECs 2020-H67 & 2020-H77 -- 2020 HU1, 2020 GD2, P/2019 Y2, C/2019 K7, 68278, 66251, 52768, 413989, 40267, 388945, 35107, 184990, 137064, 7753, 278P, 249P, 246P, 124P, 88P, 87P, 10P
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 9 in MPECs 2020-H69, 2020-H70, 2020-H74, 2020-H75, 2020-H76 & 2020-H77 -- 2020 HJ2, 2020 HH2, 2020 HG2, 2020 HD2, 2020 HC2, 2020 GQ2, 2020 GO2, 2017 UC45, 2010 JV153
`A77`	Chante-Perdrix Obs. in France, 8 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A, C/2019 Y1, C/2017 T2, 249P, 210P, 88P
`970`	Chelmsford Obs. in England, 2 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-A
`Z99`	Clixby Obs. in England, 3 in MPECs 2020-H67 & 2020-H77 -- 2020 HY, C/2019 Y4-A, C/2017 T2
`178`	Collonges Obs., 2 in MPEC 2020-H67 -- C/2019 Y4-B, 124P
`L59`	Compustar Obs., 1 in MPEC 2020-H67 -- 2018 V3
`850`	Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2020-H67 & 2020-H77 -- P/2020 G1, 52768
`B50`	Corner Obs. in Germany, 2 in MPEC 2020-H67 -- C/2019 Y4-B, C/2019 Y4-A
`N55`	Corona Borealis Obs. in Tibet, 1 in MPEC 2020-H67 -- C/2019 Y4-A
`Z39`	Costa Teguise Obs. in the Canary Islands, 3 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-A
`I39`	Cruz del Sur Obs. in Argentina, 2 in MPEC 2020-H67 -- C/2020 F8, C/2020 F5
`P66`	Deokheung Obs., 1 in MPEC 2020-H67 -- C/2019 Y4-A
`K87`	Dettelbach Vineyard Obs. in Germany, 12 in MPECs 2020-H67 & 2020-H77 -- 2020 HY, 2020 HM, 2020 GJ2, 2020 GF3, 2020 GD2, 2020 FW3, 2020 FO2, 2020 FB6, 2020 FA7, 2020 FA3, C/2019 Y4-C, C/2017 K2
`K77`	EHB01 Obs., 6 in MPEC 2020-H67 -- C/2020 B3, 2019 K6, C/2017 K2, 249P, 210P, 91P
`Z40`	El Manzanillo Obs., 2 in MPEC 2020-H67 -- C/2019 Y4-B, C/2019 Y4-A
`734`	Farpoint Obs. in Kansas, 5 in MPECs 2020-H73, 2020-H75 & 2020-H77 -- 2020 HH2, 2020 HF2, 2020 FO2, 2017 FE90, 2015 FT118
`W46`	Foxfire Village Obs., 5 in MPECs 2020-H67 & 2020-H77 -- 2017 FE90, 2001 GS2, 388838, 190166, 246P
`G26`	Fushan Obs. in China, 1 in MPEC 2020-H67 -- C/2017 T2
`372`	Geisei Obs. in Japan, 4 in MPEC 2020-H67 -- P/2020 G1, C/2020 F3, C/2019 Y4-C, C/2019 Y4-B
`E89`	Geyserland Obs. in New Zealand, 2 in MPEC 2020-H67 -- C/2020 F3, C/2019 U6
`E94`	Gisborne Obs. in New Zealand, 2 in MPEC 2020-H67 -- C/2020 F8, C/2020 F3
`Z30`	Glyn Marsh Obs., 7 in MPECs 2020-H67 & 2020-H77 -- C/2019 Y4-D, C/2019 Y4-C, P/2019 Y2, C/2019 Y1, C/2017 T2, 52768, 124P
`K73`	Gravina Obs. in Italy, 2 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C
`J95`	Great Shefford Obs. in England, 3 in MPECs 2020-H67, 2020-H76 & 2020-H77 -- 2020 HM, 2020 HJ2, C/2019 Y4-B
`134`	Groszschwabhausen Obs. in Germany, 1 in MPEC 2020-H67 -- C/2018 W2
`A17`	Guidestar Obs. in Germany, 3 in MPECs 2020-H64 & 2020-H77 -- 2020 HW1, 2020 GY2, 2009 WZ7
`Q56`	Heaven's Mirror Obs., 1 in MPEC 2020-H67 -- C/2020 F8
`N502`	program code 2 via Himalayan Chandra Telescope, 1 in MPEC 2020-H67 -- C/2020 F2
`P87`	Hirao Obs., 3 in MPEC 2020-H67 -- C/2019 Y4-B, 88P, 87P
`D88`	Hiratsuka Obs. in Japan, 8 in MPEC 2020-H67 -- P/2019 Y2, C/2019 F1, C/2019 C1, 246P, 124P, 117P, 88P, 87P
`750`	Hobbs Obs. in Wisconsin, 2 in MPEC 2020-H67 -- C/2017 T2, 124P
`H06`	iTelescope Obs. Mayhill in New Mexico, 2 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-A
`H06>`	program code ">" (39) via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2020-H67 -- C/2019 Y4-C
`Q62`	iTelescope Obs. Siding Spring in New South Wales, 4 in MPECs 2020-H67 & 2020-H77 -- 2020 FC5, C/2020 F8, C/2020 F3, C/2019 U6
`Q62'`	program code "'" (16) via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-H67 -- C/2020 F2
`Q621`	Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 13 in MPEC 2020-H67 -- C/2020 F3, P/2019 Y2, C/2019 U6, 2019 K6, C/2018 W2, 2018 V3, C/2018 A6, C/2016 X1, 296P, 115P, 91P, 58P, 2I
`G19`	Kant Obs., 1 in MPEC 2020-H67 -- C/2019 Y4-C
`K85`	Kelmis Obs., 3 in MPEC 2020-H67 -- C/2019 Y4-A, C/2018 W2, 260P
`585`	Kiev Comet Station in Ukraine, 1 in MPEC 2020-H67 -- C/2019 Y4-C
`1861`	program code 1 via Kitab Obs., 3 in MPECs 2020-H67 & 2020-H77 -- 2020 GD2, 2020 FM6, 88P
`246`	KLENOT in the Czech Republic, 9 in MPECs 2020-H66, 2020-H67, 2020-H68, 2020-H71, 2020-H74 & 2020-H77 -- 2020 HY1, 2020 HG2, 2020 HE2, 2020 HB2, 2020 GD2, C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-B, 246P
`L12`	Koksijde Obs., 3 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2017 T2
`C401`	program code 1 via Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-H77 -- 52768
`D95`	Kurihara Obs. in Japan, 5 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 C1, 155P, 87P
`V37`	LCO McDonald Obs. in Texas, 1 in MPEC 2020-H77 -- 388945
`Q63`	LCO Siding Spring A in New South Wales, 1 in MPEC 2020-H67 -- C/2020 F8
`C10`	Maisoncelles Obs. in France, 2 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C
`232`	Masquefa Obs. in Spain, 1 in MPEC 2020-H67 -- C/2019 Y4-B
`Z22`	MASTER IAC Obs. in the Canary Islands, 2 in MPEC 2020-H77 -- 86667, 66251
`G07`	Millau Obs., 1 in MPEC 2020-H67 -- C/2017 T2
`118`	Modra Obs. in Slovakia, 2 in MPEC 2020-H67 -- C/2010 U3, 278P
`213`	Montcabre Obs. in Spain, 3 in MPEC 2020-H67 -- C/2019 Y4-B, C/2019 Y4-A, C/2019 Y1
`108`	Montelupo Obs. in Italy, 1 in MPEC 2020-H67 -- P/2020 G1
`B06`	Montseny Obs. in Spain, 1 in MPEC 2020-H67 -- C/2019 Y4-A
`V01`	Mountainville Obs. in Utah, 1 in MPEC 2020-H77 -- 2020 HM
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 34 in MPECs 2020-H63, 2020-H64, 2020-H65, 2020-H67, 2020-H71, 2020-H74, 2020-H75, 2020-H76 & 2020-H77 -- 2020 HX1, 2020 HW1, 2020 HJ2, 2020 HH2, 2020 HG2, 2020 HE2, C/2020 F6, C/2020 F2, C/2020 B3, P/2019 Y2, 2019 K6, C/2019 F1, 2019 AK54, 2015 OL35, 477524, 416231, 40267, 276732, 248926, 163692, 144861, 136993, 5693, 4257, 1627, 392P, 377P, 376P, 278P, 266P, 203P, 91P, 88P, 87P
`608`	NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2020-H77 -- 2005 UO157
`C47`	Nonndorf Obs. in Austria, 4 in MPECs 2020-H67 & 2020-H77 -- 2020 GD2, C/2019 N1, C/2018 U1, 52768
`J69`	North Obs. in England, 1 in MPEC 2020-H67 -- C/2019 Y4-A
`Z80`	Northolt Branch Obs. in England, 8 in MPECs 2020-H67 & 2020-H77 -- 2020 GJ2, C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-B, 539940, 413989, 373428, 137064
`G34`	Oberfrauendorf Obs. in Germany, 2 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B
`C23`	Olmen Obs. in Belgium, 15 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A, P/2019 Y2, C/2019 N1, C/2019 F1, C/2017 T2, C/2017 K2, C/2014 B1, C/2010 U3, 278P, 155P, 117P, 88P, 31P
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 74 in MPECs 2020-H63, 2020-H64, 2020-H65, 2020-H66, 2020-H67, 2020-H68, 2020-H69, 2020-H71, 2020-H72, 2020-H73, 2020-H75 & 2020-H77 -- 2020 HY1, 2020 HY, 2020 HX1, 2020 HW1, 2020 HU1, 2020 HU, 2020 HJ1, 2020 HH2, 2020 HF2, 2020 HE2, 2020 HC2, 2020 HB2, 2020 GV2, 2020 GS, 2020 GC3, 2020 GB2, 2020 FS1, 2020 F7, P/2020 F1, 2020 DB5, 2020 CJ1, C/2020 B2, P/2019 Y2, 2019 XL1, 2019 GO3, 2019 AK54, 2018 V3, 2016 OY2, 2014 WD201, 2013 ON5, 2012 QE50, 2012 JS17, 2012 EA2, 2011 JR13, 2006 PY17, 2005 VY3, 2003 JN14, 2000 LK, 88264, 53409, 519354, 513125, 510262, 471240, 455591, 450185, 39796, 31345, 308899, 27031, 26760, 190166, 18109, 175729, 162422, 154589, 152941, 138524, 136923, 136618, 7358, 1917, 377P, 284P, 278P, 249P, 240P, 231P, 228P, 155P, 124P, 117P, 87P, 31P
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 22 in MPECs 2020-H63, 2020-H67, 2020-H68, 2020-H70, 2020-H72 & 2020-H77 -- 2020 HD2, 2020 HB2, 2020 GA3, 2020 FF6, 2020 BR16, C/2020 B3, 2019 XG1, 2019 JD7, 2019 AK54, C/2017 K2, 2016 FT14, C/2014 B1, 2007 HX82, 2005 VY3, 99935, 36183, 185702, 169675, 142781, 141670, 6050, 87P
`K19`	PASTIS Obs. in France, 1 in MPEC 2020-H67 -- C/2019 Y4-A
`323`	Perth Obs. in Western Australia, 3 in MPEC 2020-H67 -- C/2020 F3, C/2019 U6, 88P
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPECs 2020-H67 & 2020-H77 -- C/2019 Y4-C, 2015 TX143
`6581`	Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2020-H71 -- 2020 HE2
`D29`	Purple Mtn. Obs. Xuyi Station in China, 7 in MPEC 2020-H67 -- C/2019 F1, 246P, 155P, 124P, 88P, 78P, 10P
`L04`	ROASTERR-1 in Romania, 2 in MPEC 2020-H67 -- C/2017 T2, 87P
`V83`	Rolling Hills Obs. in Missouri, 1 in MPEC 2020-H77 -- 2014 JO25
`X03`	SADR Obs., 7 in MPEC 2020-H67 -- C/2020 F8, C/2020 F5, C/2020 B3, C/2019 B3, 91P, 28P, 10P
`233`	San Vito Obs. in Italy, 3 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2020-H69 -- 2020 HC2
`B56`	Sant Pere Obs. in Spain, 3 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-B
`C95`	SATINO-1 in France, 1 in MPEC 2020-H77 -- 2020 BO1
`204`	Schiaparelli Obs. in Italy, 2 in MPEC 2020-H67 -- C/2019 Y4-B, C/2019 Y4-A
`K24`	Schmelz Obs. in Germany, 2 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-B
`033`	Schwarzschild Obs. in Germany, 7 in MPECs 2020-H64, 2020-H65, 2020-H66, 2020-H71, 2020-H73, 2020-H74 & 2020-H76 -- 2020 HY1, 2020 HX1, 2020 HW1, 2020 HJ2, 2020 HG2, 2020 HF2, 2020 HE2
`K14`	Sencelles Obs. in Spain, 4 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A
`G402`	program code 2 via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C
`W88#`	program code "#" (12) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-H67 -- C/2020 F8
`W88%`	program code "%" (14) via Slooh.com Chile Obs. in Chile, 2 in MPEC 2020-H67 -- C/2020 F8, C/2019 U6
`W883`	B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-H67 -- C/2020 F8
`W885`	M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-H67 -- C/2020 F8
`Y00`	SONEAR in Brazil, 2 in MPEC 2020-H77 -- 20826, 137064
`L39`	Spica Obs., 1 in MPEC 2020-H67 -- C/2019 Y4-C
`K21`	St. Saturnin les Avignon Obs. in France, 1 in MPEC 2020-H67 -- C/2019 Y4-A
`C36`	Starry Wanderer Obs. in Belarus, 2 in MPEC 2020-H67 -- C/2019 Y4-D, C/2018 N2
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 25 in MPECs 2020-H63, 2020-H64, 2020-H65, 2020-H66, 2020-H68, 2020-H69, 2020-H71, 2020-H73, 2020-H74, 2020-H76 & 2020-H77 -- 2020 HY1, 2020 HY, 2020 HX1, 2020 HW1, 2020 HS1, 2020 HM, 2020 HL, 2020 HJ2, 2020 HJ, 2020 HG2, 2020 HG, 2020 HF2, 2020 HE2, 2020 HD, 2020 HC2, 2020 HB2, 2020 HB1, 2020 GY2, 2020 GU2, 2020 GS2, 2020 GM2, 2020 GC3, 2020 FD3, 2019 AK54, 2016 EL84
`Q38`	Swan Hill Obs., 5 in MPEC 2020-H67 -- C/2020 F8, C/2020 F3, C/2019 U6, C/2018 F4, 58P
`J22`	Tacande Obs. in the Canary Islands, 1 in MPEC 2020-H67 -- C/2020 F2
`I81`	Tarbatness Obs. in Scotland, 11 in MPEC 2020-H67 -- C/2019 Y4-A, P/2019 Y2, C/2019 Y1, C/2019 N1, C/2018 U1, C/2018 N2, C/2017 T2, C/2017 K2, C/2010 U3, 246P, 155P
`954`	Teide Obs. in the Canary Islands, 1 in MPEC 2020-H67 -- 2I
`C35`	Terrassa Obs. in Spain, 1 in MPEC 2020-H67 -- C/2019 Y4-C
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2020-H77 -- 2019 YJ2, 2019 PE2
`K41`	Vegaquattro Obs. in Italy, 2 in MPEC 2020-H67 -- 246P, 10P
`H47`	Vicksburg Obs. in Mississippi, 3 in MPEC 2020-H67 -- C/2019 F1, C/2018 U1, C/2017 K2
`L01`	Visnjan Obs. in Croatia, 5 in MPECs 2020-H65, 2020-H66, 2020-H70, 2020-H73 & 2020-H74 -- 2020 HY1, 2020 HX1, 2020 HG2, 2020 HF2, 2020 HD2
`G23`	Vulpecula Obs., 4 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-A, C/2019 Y1
`G56`	Walnut Creek Obs. in northern California, 2 in MPEC 2020-H77 -- 2020 FA7, 539940
`Z92`	West Park Obs. in England, 2 in MPECs 2020-H67 & 2020-H77 -- C/2017 T2, 52768
`G33`	Wickede Obs. in Germany, 1 in MPEC 2020-H77 -- 52768
`C51`	WISE in Earth polar orbit, 3 in MPEC 2020-H77 -- 2017 BE32, 54071, 492143
`Q78`	Woogaroo Obs., 1 in MPEC 2020-H67 -- 28P
`367`	Yatsuka Obs. in Japan, 3 in MPEC 2020-H67 -- C/2019 N1, C/2017 T2, 88P
`Z57`	Zuben Obs., 2 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-A
`I41`	Zwicky Transient Facility in southern California, 1 in MPEC 2020-H67 -- 2020 F7

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 21 April '20

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2358 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL and NEODyS listings is 100 years, and both post impact solutions beyond that for some special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.
0000NNN000 Object	Risk Monitor	When Noted UTC	0000T0000 Year Range	VI #	000NN00 Prob Cum	T0000 PS Cum	T0000 PS Max	T S	Notes for Today's Latest Risk Assessments

2020 GA3	NEODyS	1601	2054-2118	21	1.25e-06	-5.95	-6.43	0	NEODyS: "Based on 33 optical observations (of which 1 are rejected as outliers) from 2020-04-15.411 to 2020-04-18.442."
2020 GA3	JPL Sentry	1600	2054-2119	20	4.772271e-06	-5.42	-5.80	0	JPL: Computed at 07:08 today Pacific time based on 33 observations spanning 3.0309 days (2020-Apr-15.41021 to 2020-Apr-18.44112). Diameter approximately 0.033 km. from weighted mean H=25.04.

2020 GY2	NEODyS	1601	2093-2118	5	1.27e-06	-5.30	-5.32	0	NEODyS: "Based on 51 optical observations (of which 0 are rejected as outliers) from 2020-04-15.350 to 2020-04-21.439."
2020 GY2	JPL Sentry	1600	2093-2118	4	1.2481e-06	-5.33	-5.44	0	JPL: Computed at 07:00 today Pacific time based on 51 observations spanning 6.0889 days (2020-Apr-15.34915 to 2020-Apr-21.43804). Diameter approximately 0.064 km. from weighted mean H=23.63.

2020 GV2	NEODyS	1601	2077-2078	2	1.38e-07	-7.73	-7.87	0	NEODyS: "Based on 55 optical observations (of which 1 are rejected as outliers) from 2020-04-15.417 to 2020-04-20.453."
2020 GV2	JPL Sentry	1600	2077-2077	1	1.726e-07	-7.62	-7.62	0	JPL: Computed at 07:00 today Pacific time based on 43 observations spanning 5.0359 days (2020-Apr-15.416676 to 2020-Apr-20.452591). Diameter approximately 0.014 km. from weighted mean H=26.84.

2015 HV182	NEODyS	1601	R E M O V E D						-
2015 HV182	JPL Sentry	0014	R E M O V E D						JPL: Risk listing removed at 0005 UTC today

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale (next 100 years)

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.

Chronology on 21 April '20

Times are UTC for when items were noted or added by The Tracking News.

2358	Grabbed MPEC 2020-H78 - Reports of Suspected Cometary Activity - see above
1601	Noted that NEODyS has removed 2015 HV182 as an impact risk - see above Noted that NEODyS has updated its 2020 GA3 risk assessment - see above Noted that NEODyS has updated its 2020 GV2 risk assessment - see above Noted that NEODyS has updated its 2020 GY2 risk assessment - see above
1600	Noted that JPL Sentry has updated its 2020 GA3 risk assessment - see above Noted that JPL Sentry has updated its 2020 GV2 risk assessment - see above Noted that JPL Sentry has updated its 2020 GY2 risk assessment - see above Grabbed MPEC 2020-H67 - Observations and Orbits of Comets and A/ Objects - see above Grabbed MPEC 2020-H68 - 2020 HB2 - see above Grabbed MPEC 2020-H69 - 2020 HC2 - see above Grabbed MPEC 2020-H70 - 2020 HD2 - see above Grabbed MPEC 2020-H71 - 2020 HE2 - see above Grabbed MPEC 2020-H72 - 2005 VY3 - see above Grabbed MPEC 2020-H73 - 2020 HF2 - see above Grabbed MPEC 2020-H74 - 2020 HG2 - see above Grabbed MPEC 2020-H75 - 2020 HH2 - see above Grabbed MPEC 2020-H76 - 2020 HJ2 - see above Grabbed MPEC 2020-H77 - Daily Orbit Update - see above
0510	Grabbed MPEC 2020-H63 - 2019 AK54 - see above Grabbed MPEC 2020-H64 - 2020 HW1 - see above Grabbed MPEC 2020-H65 - 2020 HX1 - see above Grabbed MPEC 2020-H66 - 2020 HY1 - see above
0014	Noted that JPL Sentry has removed 2015 HV182 as an impact risk - see above

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