2020-04-19 Tracking News

Contents on 19 April '20

IAU Minor Planet Center
- NEOCP Activity -- 103 listings
- New MPECs -- twelve MPECs
Observers -- 33 observers
Impact Risk Monitoring -- two objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1120 risk-listed objects, 89 have had news in the last 31 days. Updated at 2000 UTC on 19 April.
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 19 April '20

The MPC's NEO Confirmation Page has 103 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 103 objects listed. Of these, 60 were "one nighters." So far The Tracking News has counted a total of 122 listings on the NEOCP today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs on 19 April '20

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been twelve MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2020-H29 time-stamped "01:47 UT" - 2020 HN - see below
MPEC 2020-H30 time-stamped "01:55 UT" - 2020 HO - see below
MPEC 2020-H31 time-stamped "11:37 UT" - 2020 HP - see below
MPEC 2020-H32 time-stamped "11:41 UT" - 2020 HR - see below
MPEC 2020-H33 time-stamped "11:48 UT" - 2020 HT - see below
MPEC 2020-H34 time-stamped "11:50 UT" - 2020 HU - see below
MPEC 2020-H35 time-stamped "11:53 UT" - 2020 HV - see below
MPEC 2020-H36 time-stamped "11:56 UT" - 2020 HW - see below
MPEC 2020-H37 time-stamped "11:57 UT" - 2020 HX - see below
MPEC 2020-H38 time-stamped "12:14 UT" - Daily Orbit Update - see below
MPEC 2020-H39 time-stamped "15:23 UT" - 2020 HY - see below
MPEC 2020-H40 time-stamped "15:34 UT" - 2020 HB1

MPEC 2020-H40 - "15:34 UT" - 2020 HB1

K20H01B 2020 HB1 (Earth MOID=6.1 LD, H=27.0 ~13m) was picked up at 0854 UT on 18 April by the Mt. Lemmon Survey (MLS), observing it at April 18.37-39p3. This detection was confirmed by Pan-STARRS 2 (PS2) (April 16.40-42p3 & 17.44p1), Steward Obs. Mt. Lemmon Station (April 18.46-47p4 & 19.31-32p3), and Visnjan Obs. (April 19.10-11p6).

MPEC 2020-H39 - "15:23 UT" - 2020 HY

K20H00Y 2020 HY (small asteroid, Earth MOID=4.6 LD, H=22.6 ~102m) was picked up at 1418 UT on 17 April by Pan-STARRS 1 (PS1), observing it at April 17.60-62p4. This detection was confirmed by Schwarzschild Obs. (April 17.98p3 & 18.10p3), Visnjan Obs. (April 17.99-00p4), Astronomical Research Obs. Westfield (April 18.29-30p3), Steward Mt. Lemmon Sta. (April 18.39p4 & 19.48p4), Pascoli Obs. (April 18.95-96p3), Schiaparelli Obs. (April 19.05-07p3), Squirrel Valley Obs. (April 19.21-24p4), Cordell-Lorenz Obs. (April 19.26-27p2), and ATLAS Haleakala (April 19.50-52p4).

<< DOU on 19 April '20 >> MPEC 2020-H38 - "12:14 UT" - Daily Orbit Update

Observations of risk-listed objects
K20G02Z 2020 GZ2 (small asteroid, arc=4 days, H=27.9 ~9m, close passer) from Squirrel Valley Obs. (April 19.05-06p3)
Observations of recently (no longer) risk-listed objects
K20F06M 2020 FM6 (almost small, arc=24 days, H=21.9 ~141m) from ATLAS Haleakala (April 18.50-52p4)
Observations of close-passing objects
K16H06P 2016 HP6 (arc=3 opp, H=25.4 ~28m, NHATS target) from MLS (April 18.24-27p4)
c8945 388945 2008 TZ3 from Castelmartini Obs. (April 17.03p3) and ATLAS Mauna Loa (April 18.39-41p4)
Observation campaigns (NHATS targets, radar support)
K20G03B 2020 GB3 (arc=4 days, H=26.5 ~17m, NHATS) from Steward Mt. Lemmon Sta. (April 19.47p3)
K20G02R 2020 GR2 (arc=5 days, H=26.4 ~18m, NHATS) from MLS (April 18.39-41p4)
K20C01J 2020 CJ1 (arc=88 days, H=23.8 ~59m, NHATS) from ARO Westfield (April 18.39-40p3 at V=21.8-22.3)
K18R01Y 2018 RY1 (arc=52 days, H=24.4 ~45m, NHATS) from UH/Tholen NEO Follow-Up 2.24m Telescope (2018 Oct. 4.26p1 at G=23.53 & 2018 Oct. 5.26p1 at G=23.37)
K11G60D 2011 GD60 (arc=3 opp, H=21.8 ~148m, NHATS) from PS2 (April 19.36-40p4)
K06F36H 2006 FH36 (arc=3 opp, H=23.0 ~85m, NHATS) from W.F. Cashwell via Slooh.com Chile Obs. (April 18.13-18p4) and ATLAS Haleakala (April 18.45-47p5)
J0166 190166 2005 UP156 (radar) from Castelmartini Obs. (April 16.93-94p3)
02102 2102 Tantalus (1975 YA) (radar) from ATLAS Mauna Loa (April 18.52-55p4)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20H00M 2020 HM (arc=2 days, H=24.3 ~47m) from the Catalina Sky Survey (CSS) (April 19.26-27p3)
K20G02T 2020 GT2 (arc=5 days, H=25.2 ~31m) from Castelmartini Obs. (April 16.98p3)
K20G02S 2020 GS2 (arc=6 days, H=23.0 ~85m) from PS1 (April 18.44-49p4)
K20G02K 2020 GK2 (arc=14 days, H=22.5 ~107m) from MLS (April 18.28-29p4)
K20G02J 2020 GJ2 (Q=4.674 AU, arc=26 days, H=24.7 ~39m) from Castelmartini Obs. (April 17.01-02p7), Transit Dreams Obs. (April 17.09-13p9), and ATLAS Mauna Loa (April 18.50-53p4)
K20F07A 2020 FA7 (arc=33 days, H=22.1 ~129m) from Castelmartini Obs. (April 16.91-92p3), MLS (April 18.22-24p4), and ATLAS Mauna Loa (April 18.32-33p4)
K20F06W 2020 FW6 (arc=20 days, H=23.2 ~78m) from MLS (April 18.29-31p4)
K20F05F 2020 FF5 (arc=25 days, H=24.9 ~35m) from PS2 (April 18.47-49p3)
K20F02O 2020 FO2 (arc=84 days, H=22.4 ~112m) from MLS (April 18.28-29p4)
K20B12Y 2020 BY12 (arc=89 days, H=23.7 ~62m) from ARO Westfield (April 18.36-37p3 at V=21.8-22.1)
K20A03Q 2020 AQ3 (arc=2 days, H=23.6 ~65m) from SATINO-1 (Jan. 16.21-24p3)
K19X00G 2019 XG (arc=141 days, H=21.9 ~141m) from PS1 (April 18.43-48p3)
Observations of other objects
K20H00H 2020 HH (arc=8 days, H=20.0 ~339m) from PS1 (April 18.45-48p3)
K20G03F 2020 GF3 (arc=15 days, H=19.6 ~407m) from ATLAS Mauna Loa (April 18.43-45p4)
K20G02D 2020 GD2 (arc=168 days, H=20.6 ~257m) from Castelmartini Obs. (April 17.05p3), Transit Dreams Obs. (April 17.09p1 & 17.13-14p5), ATLAS Mauna Loa (April 18.45-47p4), program code 1 via Kitab Obs. (April 18.73p6), Saarbruecken Rastpfuhl Obs. (April 18.83-84p2), and QOS Obs. (April 18.83-84p6)
K20F05R 2020 FR5 (arc=25 days, H=21.0 ~214m) from ATLAS Haleakala (April 18.50-52p3 & 18.58p1)
K20D05B 2020 DB5 (arc=49 days, H=19.2 ~490m) from MLS (April 18.49-50p3)
K20D04M 2020 DM4 (arc=52 days, H=21.7 ~155m) from Transit Dreams Obs. (April 17.05-10p5) and ATLAS Haleakala (April 18.43-45p4)
K20D02R 2020 DR2 (arc=58 days, H=18.8 ~589m) from PS1 (April 18.32-35p3)
K20B08G 2020 BG8 (arc=116 days, H=21.1 ~204m) from MLS (April 18.28-29p4)
K20A02Z 2020 AZ2 (arc=103 days, H=21.3 ~186m) from PS2 (April 18.36-39p3)
K19X01G 2019 XG1 (Q=4.163 AU, arc=2 opp, H=19.2 ~490m) from Castelmartini Obs. (April 16.94-95p3), Tentlingen Obs. (April 17.95-99p4), and ATLAS Mauna Loa (April 18.35-38p4)
K19S10N 2019 SN10 (arc=231 days, H=21.2 ~195m) from PS1 (April 18.43-47p3)
K19S06H 2019 SH6 (arc=2 opp, H=20.0 ~339m) from PS1 (April 18.44-48p4)
K19B01O 2019 BO1 (arc=2 opp, H=19.6 ~407m) from Farpoint Obs. (Jan. 27.36-37p3)
K18E04E 2018 EE4 (arc=4 opp, H=20.5 ~269m) from PS2 (April 18.51-55p4)
K17F90E 2017 FE90 (arc=3 opp, H=19.6 ~407m) from ATLAS Haleakala (April 18.49-51p4)
K17B32E 2017 BE32 (arc=2 opp, H=19.4 ~446m) from PS1 (April 19.25-28p3)
K15FX2P 2015 FP332 (i=36.5°, Q=4.790 AU, arc=5 opp, H=17.3 ~1.17 km) from CSS (April 18.40-42p3)
K13G07Y 2013 GY7 (arc=3 opp, H=20.4 ~282m) from PS1 (April 18.45-48p3)
K12J04M 2012 JM4 (arc=2 opp, H=21.1 ~204m) from PS1 (April 19.30-33p3)
K11W02L 2011 WL2 (arc=5 opp, H=20.8 ~234m) from PS1 (April 18.25-27p3)
K11F02Z 2011 FZ2 (Q=4.750 AU, arc=4 opp, H=17.5 ~1.07 km) from Castelmartini Obs. (April 17.09p2)
K10X11D 2010 XD11 (q=0.326 AU, Q=4.098 AU, arc=4 opp, H=17.9 ~891m) from CSS (April 18.22-24p4)
K09F04U 2009 FU4 (arc=4 opp, H=17.9 ~891m) from MLS (April 18.19-21p4)
K09D36R 2009 DR36 (arc=3 opp, H=20.6 ~257m) from PS2 (April 18.26-30p4) and PS1 (April 19.29-33p4)
K07H82X 2007 HX82 (Q=4.101 AU, arc=3 opp, H=20.4 ~282m) from PS2 (April 18.42-45p4)
K04F29F 2004 FF29 (arc=6 opp, H=18.1 ~812m) from ATLAS Haleakala (April 18.55-57p4)
K02S00Q 2002 SQ (arc=6 opp, H=19.6 ~407m) from PS1 (April 18.55-59p4)
K01G02S 2001 GS2 (arc=3 opp, H=20.6 ~257m) from MLS (April 18.25-26p4) and ATLAS Haleakala (April 18.42-44p4)
K00CA1R 2000 CR101 (arc=4 opp, H=20.1 ~323m) from PS1 (April 18.50-52p3)
r9940 539940 2017 HW1 from CSS (April 18.35-37p4)
q0862 520862 2014 WG7 from MLS (April 18.35-37p4 at G=21.1-22.2)
p6154 516154 2016 CL32 from PS1 (April 18.44-48p3)
o6459 506459 2002 AL14 from Castelmartini Obs. (April 17.10p2)
o0094 500094 2012 BC20 from CSS (April 18.22-24p4)
m3878 483878 2005 YS165 from CSS (April 18.35-37p4)
m3432 483432 2001 DF47 from ARO Westfield (April 18.35p2 at V=22.0-22.1)
l1034 471034 2009 TG8 from PS1 (April 18.50-52p3)
k5633 465633 2009 JR5 from PS2 (April 19.31-35p4)
k2550 462550 2009 CB3 from MLS (April 18.24-27p4)
j9386 459386 2012 KJ11 from MLS (April 18.15-16p4) and PS2 (April 19.30-34p4)
h6324 436324 2010 GZ6 from Castelmartini Obs. (April 17.04p3) and ATLAS Mauna Loa (April 18.40-43p4)
h3992 433992 2000 HD74 from ATLAS Mauna Loa (April 18.45-47p4) and PS2 (April 18.47-50p4)
h2509 432509 2010 FF7 from PS1 (April 18.44-48p6)
f3989 413989 2007 EL88 from ATLAS Mauna Loa (April 18.30-32p4)
c8838 388838 2008 EZ5 from Castelmartini Obs. (April 16.89-90p3)
b8610 378610 2008 FT6 from MLS (April 18.13-14p3)
b3428 373428 1999 TC5 from Castelmartini Obs. (April 16.99p3), Tentlingen Obs. (April 17.99-03p4), and ATLAS Mauna Loa (April 18.37-39p3)
X3555 333555 2005 VY17 from CSS (April 18.33-35p4)
X3510 333510 2005 MD from PS1 (April 19.30-33p4 at w=21.9-22.2)
X1792 331792 2003 MT2 from PS2 (April 19.25-29p4)
V8050 318050 2004 FC32 from Castelmartini Obs. (April 17.02p3) and ATLAS Mauna Loa (April 18.42-44p3)
R6274 276274 2002 SS41 from MLS (April 18.27-29p4) and ATLAS Mauna Loa (April 18.40-42p4)
Q7720 267720 2003 CA from MLS (April 18.32-34p4)
Q7494 267494 2002 JB9 from Castelmartini Obs. (April 17.08p2)
O3298 243298 2008 EN82 from PS2 (April 18.31-35p4)
N7551 237551 2000 WQ19 from ATLAS Mauna Loa (April 18.31-34p4)
N2368 232368 2003 AZ2 from PS2 (April 19.31-35p4)
M8368 228368 2000 WK10 from CSS (April 18.17-19p3)
K3217 203217 2001 FX9 from PS1 (April 18.50-53p4)
J2563 192563 1998 WZ6 from Castelmartini Obs. (April 17.13p3)
I4990 184990 2006 KE89 from PS2 (April 18.56-58p3)
G9675 169675 2002 JM97 from ATLAS Haleakala (April 18.55-56p4)
G4400 164400 2005 GN59 from PS1 (April 18.49-53p4)
F4993 154993 2005 EA94 from MLS (April 18.22-24p4) and ATLAS Mauna Loa (April 18.34-36p4)
F4453 154453 2003 CJ11 from PS2 (April 18.42-44p3)
E2555 142555 2002 TB58 from ATLAS Haleakala (April 18.47-49p4)
D8847 138847 2000 VE62 from MASTER-II Tunka (April 17.60p2 & 17.69p1) and Pin Oak Obs. (April 18.08-12p2 & 19.10-14p3)
D7911 137911 2000 AB246 from PS1 (April 18.50-52p3)
D7170 137170 1999 HF1 from Castelmartini Obs. (April 17.12p3) and ATLAS Mauna Loa (April 18.56-58p4 & 18.63p2)
D7064 137064 1998 WP5 from Castelmartini Obs. (April 17.04-05p3)
D6618 136618 1994 CN2 from Castelmartini Obs. (April 16.95-96p3)
B5052 115052 2003 RD6 from Castelmartini Obs. (April 16.90-91p3) and ATLAS Mauna Loa (April 18.40-42p4)
A3067 103067 1999 XA143 from ATLAS Mauna Loa (April 18.62-63p4)
99935 99935 2002 AV4 from ATLAS Haleakala (April 18.42-45p4)
89830 89830 2002 CE from CSS (April 18.24-26p4)
86667 86667 2000 FO10 from ATLAS Haleakala (April 18.54-56p4)
86067 86067 1999 RM28 from CSS (April 18.33-35p4)
85628 85628 1998 KV2 from ATLAS Mauna Loa (April 18.47-49p4)
85275 85275 1994 LY from Castelmartini Obs. (April 17.07-08p3)
68350 68350 2001 MK3 from Castelmartini Obs. (April 17.06-07p3) and ATLAS Mauna Loa (April 18.54-56p4)
68278 68278 2001 FC7 from PS2 (April 18.41-44p4)
54686 54686 2001 DU8 from MLS (April 18.24-27p4)
52768 52768 1998 OR2 from Olmen Obs. (April 15.86-89p4), Tentlingen Obs. (April 17.85-90p5), Pin Oak Obs. (April 18.08-12p3 & 19.09-14p3), program code 1 via Kuban State Univ. Obs. (April 18.73-77p71), Saarbruecken Rastpfuhl Obs. (April 18.82p2), and Foxfire Village Obs. (April 19.05-07p3)
40267 40267 1999 GJ4 from ATLAS Mauna Loa (April 18.29-32p8)
35107 35107 1991 VH from Castelmartini Obs. (April 16.88p3) and ATLAS Mauna Loa (April 18.35-38p4)
30825 30825 1990 TG1 from ATLAS Mauna Loa (April 18.23-25p4)
25330 25330 1999 KV4 from MLS (April 18.13-15p4)
19764 19764 2000 NF5 from ATLAS Haleakala (April 18.61-63p4)
18172 18172 2000 QL7 from ATLAS Mauna Loa (April 18.26-28p4)
15745 15745 Yuliya (1991 PM5) from MLS (April 18.17-19p4)
12923 12923 Zephyr (1999 GK4) from PS2 (April 19.26-30p4)
11405 11405 1999 CV3 from ATLAS Mauna Loa (April 18.23-25p4)
11066 11066 Sigurd (1992 CC1) from ATLAS Haleakala (April 18.44-46p4)
09400 9400 1994 TW1 from CSS (April 18.15-17p4)
08566 8566 1996 EN from ATLAS Mauna Loa (April 18.26-28p4) and PS2 (April 19.31-35p4)
07088 7088 Ishtar (1992 AA) from ATLAS Mauna Loa (April 18.31-34p4) and PS1 (April 18.43-48p4)
05646 5646 1990 TR from PS1 (April 18.32-36p4)
05626 5626 1991 FE from ATLAS Mauna Loa (April 18.26-28p4)
04954 4954 Eric (1990 SQ) from ATLAS Haleakala (April 18.39-42p4)
04581 4581 Asclepius (1989 FC) from ATLAS Mauna Loa (April 18.33-35p4)
01866 1866 Sisyphus (1972 XA) from CSS (April 18.18-19p3)
01864 1864 Daedalus (1971 FA) from MLS (April 18.17-19p4) and ATLAS Mauna Loa (April 18.34-36p4)
01627 1627 Ivar (1929 SH) from ATLAS Mauna Loa (April 18.26-32p8)

MPEC 2020-H37 - "11:57 UT" - 2020 HX

K20H00X 2020 HX (small asteroid, Q=4.196 AU, H=24.3 ~47m) was picked up at 0913 UT on 16 April by MLS, observing it at April 16.38-41p4. This detection was confirmed by Steward Mt. Lemmon Sta. (April 16.46p2, 18.35-36p3 & 19.38p3), Visnjan Obs. (April 17.05-06p4), Tebbutt Obs. (April 17.35-36p2), Schwarzschild Obs. (April 18.05p3), and ARO Westfield (April 18.30-31p4).

MPEC 2020-H36 - "11:56 UT" - 2020 HW

K20H00W 2020 HW (small asteroid, H=26.2 ~19m) was picked up at 0716 UT on 18 April by MLS, observing it at April 18.30-31p3. This detection was confirmed by PS1 (April 16.51-54p4), Steward Mt. Lemmon Sta. (April 18.35p4, 18.43p4 & 19.27-29p4), Visnjan Obs. (April 18.99-01p4), and ARO Westfield (April 19.16p3).

MPEC 2020-H35 - "11:53 UT" - 2020 HV

K20H00V 2020 HV (Earth MOID=0.9 LD, H=28.9 ~6m) was picked up at 0707 UT on 18 April by MLS, observing it at April 18.30-31p3 and 19.41p4. This detection was confirmed by Steward Mt. Lemmon Sta. (April 18.43p3), Great Shefford Obs. (April 18.87-88p4), Pascoli Obs. (April 18.91-92p3), Schiaparelli Obs. (April 18.91-94p7), Visnjan Obs. (April 19.06-07p6), Squirrel Valley Obs. (April 19.13p2), and ARO Westfield (April 19.27p4).

MPEC 2020-H34 - "11:50 UT" - 2020 HU

K20H00U 2020 HU (small asteroid, H=24.9 ~35m) was picked up at 0536 UT on 16 April by MLS, observing it at April 16.23-25p4. This detection was confirmed by Steward Mt. Lemmon Sta. (April 16.39-40p3 & 18.32-33p3), Schwarzschild Obs. (April 17.89-90p4), Visnjan Obs. (April 17.92-93p3), Sandlot Obs. (April 18.24-26p3), ARO Westfield (April 19.19-21p3), and the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (April 19.34-35p4).

MPEC 2020-H33 - "11:48 UT" - 2020 HT

K20H00T 2020 HT (small asteroid, H=26.7 ~15m) was picked up at 0609 UT on 16 April by MLS, observing it at April 16.26-27p4. This detection was confirmed by PS1 (April 15.43p1), Steward Mt. Lemmon Sta. (April 16.32p3 & 18.28-29p4), Visnjan Obs. (April 16.94p3), Schwarzschild Obs. (April 18.00-01p5), and CSS-Kuiper (April 19.26p3).

MPEC 2020-H32 - "11:41 UT" - 2020 HR

K20H00R 2020 HR (H=21.2 ~195m) was picked up at 0637 UT on 16 April by MLS, observing it at April 16.28-29p4. This detection was confirmed by PS2 (April 2.47-50p4 & 15.42-45p2), Steward Mt. Lemmon Sta. (April 16.44p3, 18.20-21p4 & 19.26-27p4), Visnjan Obs. (April 16.92-93p4), and Schwarzschild Obs. (April 18.01-02p3).

MPEC 2020-H31 - "11:37 UT" - 2020 HP

K20H00P 2020 HP (small asteroid, Earth MOID=6.3 LD, H=24.2 ~49m) was picked up at 0434 UT on 18 April by MLS, observing it at April 18.19-21p4. This detection was confirmed by PS1 (March 22.47-50p2 at G=22.2), Steward Mt. Lemmon Sta. (April 18.32p3), Visnjan Obs. (April 18.94-99p4), ARO Westfield (April 19.07-08p4), and Sandlot Obs. (April 19.16p2).

MPEC 2020-H30 - "01:55 UT" - 2020 HO

K20H00O 2020 HO (Earth MOID=0.3 LD, H=28.6 ~6m) was picked up at 1158 UT on 16 April by PS1, observing it at April 16.50-53p4. This detection was confirmed by Schwarzschild Obs. (April 16.95p4), Visnjan Obs. (April 16.95-96p5), and CSS-Kuiper (April 18.33-34p3 at G=22.6-23.0).

MPEC 2020-H29 - "01:47 UT" - 2020 HN

K20H00N 2020 HN (risk listed, Earth MOID=1.0 LD, H=28.5 ~7m, close passer, NHATS target) was picked up at 0642 UT on 16 April by MLS, observing it at April 16.28-30p4. This detection was confirmed by Steward Mt. Lemmon Sta. (April 16.42p3 & 18.27-28p4), Visnjan Obs. (April 16.91-92p4), and Schwarzschild Obs. (April 16.97-98p3 & 18.03p3).

Observers on 19 April '20

A total of 33 observers appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 9 in MPECs 2020-H31, 2020-H34, 2020-H35, 2020-H36, 2020-H37, 2020-H38 & 2020-H39 -- 2020 HY, 2020 HX, 2020 HW, 2020 HV, 2020 HU, 2020 HP, 2020 CJ1, 2020 BY12, 483432
`T05`	ATLAS Haleakala in Hawaii, 15 in MPECs 2020-H38 & 2020-H39 -- 2020 HY, 2020 FR5, 2020 FM6, 2020 DM4, 2017 FE90, 2006 FH36, 2004 FF29, 2001 GS2, 99935, 86667, 19764, 169675, 142555, 11066, 4954
`T08`	ATLAS Mauna Loa in Hawaii, 31 in MPEC 2020-H38 -- 2020 GJ2, 2020 GF3, 2020 GD2, 2020 FA7, 2019 XG1, 85628, 68350, 436324, 433992, 413989, 40267, 388945, 373428, 35107, 318050, 30825, 276274, 237551, 18172, 154993, 137170, 115052, 11405, 103067, 8566, 7088, 5626, 4581, 2102, 1864, 1627
`160`	Castelmartini Obs. in Italy, 22 in MPEC 2020-H38 -- 2020 GT2, 2020 GJ2, 2020 GD2, 2020 FA7, 2019 XG1, 2011 FZ2, 85275, 68350, 506459, 436324, 388945, 388838, 373428, 35107, 318050, 267494, 192563, 190166, 137170, 137064, 136618, 115052
`703`	Catalina Sky Survey (CSS) in Arizona, 12 in MPEC 2020-H38 -- 2020 HM, 2015 FP332, 2010 XD11, 89830, 86067, 539940, 500094, 483878, 333555, 228368, 9400, 1866
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 3 in MPECs 2020-H30, 2020-H33 & 2020-H34 -- 2020 HU, 2020 HT, 2020 HO
`850`	Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2020-H39 -- 2020 HY
`734`	Farpoint Obs. in Kansas, 1 in MPEC 2020-H38 -- 2019 BO1
`W46`	Foxfire Village Obs., 1 in MPEC 2020-H38 -- 52768
`J95`	Great Shefford Obs. in England, 1 in MPEC 2020-H35 -- 2020 HV
`1861`	program code 1 via Kitab Obs., 1 in MPEC 2020-H38 -- 2020 GD2
`C401`	program code 1 via Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-H38 -- 52768
`C94`	MASTER-II Tunka in Russia, 1 in MPEC 2020-H38 -- 138847
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 30 in MPECs 2020-H29, 2020-H31, 2020-H32, 2020-H33, 2020-H34, 2020-H35, 2020-H36, 2020-H37, 2020-H38 & 2020-H40 -- 2020 HX, 2020 HW, 2020 HV, 2020 HU, 2020 HT, 2020 HR, 2020 HP, 2020 HN, 2020 HB1, 2020 GR2, 2020 GK2, 2020 FW6, 2020 FO2, 2020 FA7, 2020 DB5, 2020 BG8, 2016 HP6, 2009 FU4, 2001 GS2, 54686, 520862, 462550, 459386, 378610, 276274, 267720, 25330, 15745, 154993, 1864
`C23`	Olmen Obs. in Belgium, 1 in MPEC 2020-H38 -- 52768
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 27 in MPECs 2020-H30, 2020-H31, 2020-H33, 2020-H36, 2020-H38 & 2020-H39 -- 2020 HY, 2020 HW, 2020 HT, 2020 HP, 2020 HO, 2020 HH, 2020 GS2, 2020 DR2, 2019 XG, 2019 SN10, 2019 SH6, 2017 BE32, 2013 GY7, 2012 JM4, 2011 WL2, 2009 DR36, 2002 SQ, 2000 CR101, 516154, 471034, 432509, 333510, 203217, 164400, 137911, 7088, 5646
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 19 in MPECs 2020-H32, 2020-H38 & 2020-H40 -- 2020 HR, 2020 HB1, 2020 FF5, 2020 AZ2, 2018 EE4, 2011 GD60, 2009 DR36, 2007 HX82, 68278, 465633, 459386, 433992, 331792, 243298, 232368, 184990, 154453, 12923, 8566
`K63`	Pascoli Obs. in Italy, 2 in MPECs 2020-H35 & 2020-H39 -- 2020 HY, 2020 HV
`V93`	Pin Oak Obs., 2 in MPEC 2020-H38 -- 52768, 138847
`L18`	QOS Obs., 1 in MPEC 2020-H38 -- 2020 GD2
`L40`	Saarbruecken Rastpfuhl Obs., 2 in MPEC 2020-H38 -- 2020 GD2, 52768
`H36`	Sandlot Obs. in Kansas, 2 in MPECs 2020-H31 & 2020-H34 -- 2020 HU, 2020 HP
`C95`	SATINO-1 in France, 1 in MPEC 2020-H38 -- 2020 AQ3
`204`	Schiaparelli Obs. in Italy, 2 in MPECs 2020-H35 & 2020-H39 -- 2020 HY, 2020 HV
`033`	Schwarzschild Obs. in Germany, 7 in MPECs 2020-H29, 2020-H30, 2020-H32, 2020-H33, 2020-H34, 2020-H37 & 2020-H39 -- 2020 HY, 2020 HX, 2020 HU, 2020 HT, 2020 HR, 2020 HO, 2020 HN
`W88!`	W.F. Cashwell in Nevada via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-H38 -- 2006 FH36
`W34`	Squirrel Valley Obs. in North Carolina, 3 in MPECs 2020-H35, 2020-H38 & 2020-H39 -- 2020 HY, 2020 HV, 2020 GZ2
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 11 in MPECs 2020-H29, 2020-H31, 2020-H32, 2020-H33, 2020-H34, 2020-H35, 2020-H36, 2020-H37, 2020-H38, 2020-H39 & 2020-H40 -- 2020 HY, 2020 HX, 2020 HW, 2020 HV, 2020 HU, 2020 HT, 2020 HR, 2020 HP, 2020 HN, 2020 HB1, 2020 GB3
`858`	Tebbutt Obs. in New Mexico, 1 in MPEC 2020-H37 -- 2020 HX
`A16`	Tentlingen Obs. in Switzerland, 3 in MPEC 2020-H38 -- 2019 XG1, 52768, 373428
`W33`	Transit Dreams Obs., 3 in MPEC 2020-H38 -- 2020 GJ2, 2020 GD2, 2020 DM4
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-H38 -- 2018 RY1
`L01`	Visnjan Obs. in Croatia, 11 in MPECs 2020-H29, 2020-H30, 2020-H31, 2020-H32, 2020-H33, 2020-H34, 2020-H35, 2020-H36, 2020-H37, 2020-H39 & 2020-H40 -- 2020 HY, 2020 HX, 2020 HW, 2020 HV, 2020 HU, 2020 HT, 2020 HR, 2020 HP, 2020 HO, 2020 HN, 2020 HB1

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

Impact Risk Monitoring on 19 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 HN	NEODyS	2000	2055-2115	51	1.76e-05	-6.64	-6.99	0	NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2020-04-16.280 to 2020-04-18.279."
2020 HN	JPL Sentry	0433	2055-2120	66	1.60762218e-05	-6.64	-7.08	0	JPL: Computed at 20:25 April 18th Pacific time based on 21 observations spanning 1.9992 days (2020-Apr-16.27939 to 2020-Apr-18.27856). Diameter approximately 0.007 km. from weighted mean H=28.50.

2020 GZ2	NEODyS	2000	2049-2064	11	6.23e-04	-4.56	-4.56	0	NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2020-04-15.392 to 2020-04-19.060."
2020 GZ2	JPL Sentry	1630	2049-2077	7	0.000381211119	-4.76	-4.76	0	JPL: Computed at 07:12 today Pacific time based on 32 observations spanning 3.6683 days (2020-Apr-15.39078 to 2020-Apr-19.05909). Diameter approximately 0.008 km. from weighted mean H=28.13.

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 19 April '20

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

2000	Noted that NEODyS has updated its 2020 GZ2 risk assessment - see above Noted that NEODyS has posted 2020 HN as an impact risk - see above
1630	Noted that JPL Sentry has updated its 2020 GZ2 risk assessment - see above Grabbed MPEC 2020-H31 - 2020 HP - see above Grabbed MPEC 2020-H32 - 2020 HR - see above Grabbed MPEC 2020-H33 - 2020 HT - see above Grabbed MPEC 2020-H34 - 2020 HU - see above Grabbed MPEC 2020-H35 - 2020 HV - see above Grabbed MPEC 2020-H36 - 2020 HW - see above Grabbed MPEC 2020-H37 - 2020 HX - see above Grabbed MPEC 2020-H38 - Daily Orbit Update - see above Grabbed MPEC 2020-H39 - 2020 HY - see above Grabbed MPEC 2020-H40 - 2020 HB1 - see above
0433	Noted that JPL Sentry has posted 2020 HN as an impact risk - see above
0240	Grabbed MPEC 2020-H29 - 2020 HN - see above Grabbed MPEC 2020-H30 - 2020 HO - see above

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