2020-04-23 Tracking News

Contents on 23 April '20

IAU Minor Planet Center
- NEOCP Activity -- 131 listings
- New MPECs -- 22 MPECs
Observers -- 56 observers
Impact Risk Monitoring -- ten objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1129 risk-listed objects, 99 have had news in the last 31 days. Updated at 1732 UTC on 23 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 23 April '20

The MPC's NEO Confirmation Page has 131 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 131 objects listed. Of these, 76 were "one nighters." So far The Tracking News has counted a total of 161 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 23 April '20

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been 22 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2020-H112 time-stamped "00:05 UT" - 2020 HW3 - see below
MPEC 2020-H113 time-stamped "00:08 UT" - 2020 HX3 - see below
MPEC 2020-H114 time-stamped "01:35 UT" - 2020 HY3 - see below
MPEC 2020-H115 time-stamped "10:09 UT" - 2020 HD4 - see below
MPEC 2020-H116 time-stamped "10:14 UT" - 2020 HE4 - see below
MPEC 2020-H117 time-stamped "10:17 UT" - 2020 HF4 - see below
MPEC 2020-H118 time-stamped "10:18 UT" - 2020 HG4 - see below
MPEC 2020-H119 time-stamped "10:21 UT" - 2020 HH4 - see below
MPEC 2020-H120 time-stamped "10:23 UT" - 2020 HJ4 - see below
MPEC 2020-H121 time-stamped "10:25 UT" - 2020 HK4 - see below
MPEC 2020-H122 time-stamped "10:27 UT" - 2020 HL4 - see below
MPEC 2020-H123 time-stamped "10:29 UT" - 2020 HM4 - see below
MPEC 2020-H124 time-stamped "10:30 UT" - 2020 HN4 - see below
MPEC 2020-H125 time-stamped "10:30 UT" - 2020 HO4 - see below
MPEC 2020-H126 time-stamped "11:40 UT" - 2020 HP4 - see below
MPEC 2020-H127 time-stamped "11:41 UT" - 2020 HQ4 - see below
MPEC 2020-H128 time-stamped "11:49 UT" - 2011 HO4 - see below
MPEC 2020-H129 time-stamped "12:07 UT" - Daily Orbit Update - see below
MPEC 2020-H130 time-stamped "13:19 UT" - 2020 HR4 - see below
MPEC 2020-H131 time-stamped "13:24 UT" - 2020 HT4 - see below
MPEC 2020-H132 time-stamped "19:24 UT" - 2020 HU4 - see below
MPEC 2020-H133 time-stamped "19:32 UT" - 2020 GN3

MPEC 2020-H133 - "19:32 UT" - 2020 GN3

K20G03N 2020 GN3 (H=19.3 ~467m) was picked up at 1305 UT on 2 April by Pan-STARRS 1 (PS1), observing it at March 21.60-63p4 at G=22.2-8, April 2.55-58p3 at w=21.4-8, 21.41-45p4 at w=20.7-21.03, 22.43-46p3 at w=20.74-96, and 23.46p1 at G=21.3. This detection was confirmed by Pan-STARRS 2 (PS2) (April 2.51p1) and Steward Obs. Mt. Lemmon Station (April 23.33-36p4).

MPEC 2020-H132 - "19:24 UT" - 2020 HU4

K20H04U 2020 HU4 (borderline-small, Earth MOID=1.9 LD, H=22.0 ~135m) was picked up at 1008 UT on 19 April by PS1, observing it at 2014 April 23.40-43p3 at G=22.1-7, 2014 April 29.44-48p4 at G=22.2-23.2, 2014 May 20.33-36p3 at G=22.4-23.1, 2017 April 27.37-40p3 at G=22.3-5, March 21.57-58p2 at G=21.7-22.2, April 19.42-45p3 at w=21.60-22.61, 20.37-40p3 at w=21.85-22.31, 21.36-39p3 at G=22.3-8, and 22.38-42p4 at G=22.2-9. This detection was confirmed by Lori Allen via DECam (2014 April 23.21-23p5 at V=22.4) and the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (April 21.25-26p3 at G=22.5-23.0).

MPEC 2020-H131 - "13:24 UT" - 2020 HT4

K20H04T 2020 HT4 (risk listed, Q=4.685 AU, H=25.5 ~27m) was picked up at 0627 UT on 21 April by the Mt. Lemmon Survey (MLS), observing it at April 21.27-28p4 and 22.22p3. This detection was confirmed by CSS-Kuiper (April 21.35-36p4 at G=21.0-22.5), Schwarzschild Obs. (April 22.86p4), and Visnjan Obs. (April 22.92-93p2).

MPEC 2020-H130 - "13:19 UT" - 2020 HR4

K20H04R 2020 HR4 (small asteroid, H=23.1 ~81m) was picked up at 1128 UT on 20 April by PS1, observing it at April 20.48-52p3 at w=21.39-22.26. This detection was confirmed by MLS (April 23.36-37p3) and CSS-Kuiper (April 23.44-45p4).

<< DOU on 23 April '20 >> MPEC 2020-H129 - "12:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K20H00N 2020 HN (small asteroid, arc=6 days, H=28.5 ~7m, close passer, NHATS target) from PS1 (April 22.38-42p4)
K20H00E 2020 HE (small asteroid, q=0.146 AU, Q=4.888 AU, arc=6 days, H=23.6 ~65m) from PS1 (April 22.29-33p3 at w=21.7-22.1)
K20G03A 2020 GA3 (small asteroid, arc=3 days, H=25.1 ~32m, close passer) from Schiaparelli Obs. (April 17.07-10p3)
K20G02Y 2020 GY2 (small asteroid, arc=8 days, H=23.6 ~65m) from KLENOT (April 22.94-95p6)
K20F03T 2020 FT3 (small asteroid, arc=32 days, H=23.2 ~78m, NHATS target) from CSS-Kuiper (April 23.14-15p4 at G=21.4-23.4)
K20B03K 2020 BK3 (small asteroid, arc=28 days, H=26.9 ~14m, close passer) from SATINO-1 (Jan. 22.96-97p3)
Observations of recently (no longer) risk-listed objects
K20H01M 2020 HM1 (Q=4.628 AU, arc=6 days, H=21.0 ~214m) from Schwarzschild Obs. (April 22.88-89p3)
K20G02H 2020 GH2 (close passer) from Schiaparelli Obs. (April 12.06-08p3)
K20F06M 2020 FM6 (almost small, arc=28 days, H=21.9 ~141m) from program code 1 via Kitab Obs. (April 21.80-81p5 & 22.83p4) and ATLAS Haleakala (April 22.47-49p4)
Observations of close-passing objects
K20H03X 2020 HX3 (arc=4 days, H=27.0 ~13m) from Schwarzschild Obs. (April 22.97p3), M57 Obs. (April 23.01-02p3), ESA Optical Ground Station (ESA OGS) (April 23.14p2), and Aorangi Iti Obs. (April 23.41p2)
K20H03U 2020 HU3 (arc=2 days, H=26.0 ~21m) from Dettelbach Vineyard Obs. (April 23.05p3) and Great Shefford Obs. (April 23.09-10p4)
K20H03T 2020 HT3 (arc=2 days, H=25.2 ~31m) from Schiaparelli Obs. (April 22.92-93p3) and Dettelbach Vineyard Obs. (April 22.99-01p3)
K20H02U 2020 HU2 (arc=6 days, H=26.4 ~18m) from PS1 (April 22.33-37p4), Schwarzschild Obs. (April 22.85p3), KLENOT (April 22.86p3), and Visnjan Obs. (April 22.91p3)
K20H02N 2020 HN2 (arc=2 days, H=25.7 ~25m) from PS2 (April 22.36-38p3)
K20G02N 2020 GN2 (arc=4 days, H=25.6 ~26m) from Schiaparelli Obs. (April 15.88p5)
K20G02F 2020 GF2 (arc=3 days, H=26.0 ~21m) from Schiaparelli Obs. (April 11.98p5)
K20G02A 2020 GA2 (i=42.8°, arc=10 days, H=21.2 ~195m) from Schiaparelli Obs. (April 11.99p5)
K19C04T 2019 CT4 from UH/Tholen NEO Follow-Up 2.24m Telescope (2019 Aug. 29.42p1 at G=24.70 & 2019 Aug. 30.53p1 at G=24.62)
K14J25O 2014 JO25 (q=0.234 AU, arc=5 opp, H=17.8 ~933m, radar support) from ATLAS Haleakala (April 22.46-49p4)
c8945 388945 2008 TZ3 from Tentlingen Obs. (April 22.02-03p2), Pin Oak Obs. (April 22.11-15p3), and ATLAS Mauna Loa (April 22.41-43p4)
Observation campaigns (NHATS targets, radar support)
K20B16R 2020 BR16 (arc=120 days, H=24.3 ~47m, NHATS) from PS1 (April 22.49-52p3)
K19T02F 2019 TF2 (arc=2 opp, H=26.4 ~18m, NHATS) from PS1 (April 22.53-57p4 at w=22.07-13)
K06F36H 2006 FH36 (arc=3 opp, H=23.0 ~85m, NHATS) from ATLAS Haleakala (April 22.37-39p5)
J0166 190166 2005 UP156 (radar) from PS1 (April 22.29-33p4), Herrenberg Obs. (April 22.83-84p5), and Wishing Star Obs. (April 23.11-12p3)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small asteroids (H>22.0)
K20H03W 2020 HW3 (i=45.6°, arc=3 days, H=22.1 ~129m) from Dettelbach Vineyard Obs. (April 23.06-09p6)
K20H03Q 2020 HQ3 (arc=2 days, H=25.4 ~28m) from Schwarzschild Obs. (April 21.94p3)
K20H03F 2020 HF3 (arc=4 days, H=24.4 ~45m) from MLS (April 23.27-29p4)
K20H02O 2020 HO2 (arc=2 days, H=24.3 ~47m) from PS1 (April 22.35-37p3)
K20H02M 2020 HM2 (arc=20 days, H=25.6 ~26m) from PS1 (April 22.49-52p3)
K20H02J 2020 HJ2 (arc=4 days, H=24.7 ~39m) from Steward Mt. Lemmon Sta. (April 23.44-45p3)
K20H02F 2020 HF2 (arc=4 days, H=23.7 ~62m) from MLS (April 22.34-36p4)
K20H02C 2020 HC2 (arc=5 days, H=22.1 ~129m) from MLS (April 22.22-24p4)
K20H01U 2020 HU1 (i=43.4°, arc=4 days, H=23.4 ~71m) from Steward Mt. Lemmon Sta. (April 23.17-18p4)
K20H01T 2020 HT1 (arc=5 days, H=25.8 ~23m) from Steward Mt. Lemmon Sta. (April 23.23p4)
K20H01R 2020 HR1 (arc=4 days, H=24.4 ~45m) from PS2 (April 22.44-47p3)
K20H01O 2020 HO1 (arc=5 days, H=26.9 ~14m) from Steward Mt. Lemmon Sta. (April 23.20p4)
K20H01N 2020 HN1 (Q=4.065 AU, arc=6 days, H=25.4 ~28m) from PS1 (April 22.43-46p4)
K20H01J 2020 HJ1 (arc=6 days, H=24.3 ~47m) from PS1 (April 22.39-42p4)
K20H00Y 2020 HY (arc=5 days, H=22.8 ~93m) from Dettelbach Vineyard Obs. (April 23.02-03p3)
K20H00U 2020 HU (arc=6 days, H=24.9 ~35m) from PS1 (April 22.38-40p3 at w=21.8-22.1)
K20H00P 2020 HP (arc=32 days, H=24.2 ~49m) from Steward Mt. Lemmon Sta. (April 23.19-20p3)
K20H00M 2020 HM (arc=6 days, H=24.3 ~47m) from Steward Mt. Lemmon Sta. (April 23.18p4)
K20H00L 2020 HL (arc=6 days, H=24.9 ~35m) from PS1 (April 22.33-37p4)
K20G03K 2020 GK3 (arc=7 days, H=22.6 ~102m) from PS1 (April 22.38-42p4)
K20G02T 2020 GT2 (arc=5 days, H=25.2 ~31m) from Schiaparelli Obs. (April 15.89-90p5)
K20G02M 2020 GM2 (arc=9 days, H=23.6 ~65m) from Schiaparelli Obs. (April 16.06-07p3)
K20G00S 2020 GS (arc=20 days, H=23.7 ~62m) from PS1 (April 22.44-47p3) and ATLAS Haleakala (April 22.49-52p4)
K20G00D 2020 GD (arc=29 days, H=22.1 ~129m) from Steward Mt. Lemmon Sta. (April 23.18-19p4 at G=21.6-22.4)
K20F07A 2020 FA7 (arc=38 days, H=22.2 ~123m) from Peschiera del Garda Obs. (April 22.83-85p4), Dettelbach Vineyard Obs. (April 22.86-87p3), and Wishing Star Obs. (April 23.08p3)
K20F05X 2020 FX5 (arc=26 days, H=24.0 ~54m) from Schiaparelli Obs. (April 11.96-97p2 & 15.98-99p2)
K20F05F 2020 FF5 (arc=29 days, H=24.9 ~35m) from PS1 (April 22.53-57p4)
K20F03X 2020 FX3 (arc=19 days, H=24.0 ~54m) from Schiaparelli Obs. (April 9.82-83p2)
K20F03A 2020 FA3 (arc=32 days, H=23.2 ~78m) from Dettelbach Vineyard Obs. (April 22.88-89p3) and Mirasteilas Obs. (April 22.89-91p3)
K20F02O 2020 FO2 (arc=89 days, H=22.4 ~112m) from Dettelbach Vineyard Obs. (April 22.91-92p3)
K19X01L 2019 XL1 (arc=141 days, H=22.2 ~123m) from PS1 (April 22.39-42p4)
K19G00O 2019 GO (arc=149 days, H=23.9 ~56m) from Tholen 2.24m (2019 Aug. 29.38p1 at G=24.61)
Observations of other objects
K20H02E 2020 HE2 (arc=5 days, H=21.2 ~195m) from Steward Mt. Lemmon Sta. (April 23.20-21p4)
K20H01F 2020 HF1 (arc=6 days, H=19.0 ~537m) from ATLAS Haleakala (April 22.40-42p4)
K20H00R 2020 HR (arc=20 days, H=21.0 ~214m) from PS1 (April 22.38-42p3)
K20G03F 2020 GF3 (arc=19 days, H=19.7 ~389m) from ATLAS Mauna Loa (April 22.45-47p4) and Dettelbach Vineyard Obs. (April 22.98-99p3)
K20G02D 2020 GD2 (arc=172 days, H=20.5 ~269m) from Schiaparelli Obs. (April 12.09-10p5 & 15.90-91p5), Peschiera del Garda Obs. (April 22.88-89p5), Saarbruecken Rastpfuhl Obs. (April 22.89p2), and Dettelbach Vineyard Obs. (April 22.93-94p3)
K20G02B 2020 GB2 (q=0.117 AU, Q=4.559 AU, arc=23 days, H=21.1 ~204m) from Schiaparelli Obs. (April 12.03-04p2)
K20F06R 2020 FR6 (arc=29 days, H=21.4 ~178m) from MLS (April 22.22-24p4)
K20F06F 2020 FF6 (arc=30 days, H=20.5 ~269m) from PS1 (April 22.48-50p3)
K20F06E 2020 FE6 (arc=32 days, H=19.9 ~355m) from Purple Mtn. Obs. Xuyi Station (April 22.69-71p3)
K20F05R 2020 FR5 (arc=26 days, H=21.0 ~214m) from iTelescope Obs. Siding Spring (April 19.56-63p3)
K20E00M 2020 EM (arc=48 days, H=19.8 ~371m) from MLS (April 22.24-26p4)
K20D04M 2020 DM4 (arc=56 days, H=21.7 ~155m) from ATLAS Haleakala (April 22.34-36p4) and Woogaroo Obs. (April 22.46-48p3)
K20B13P 2020 BP13 (arc=86 days, H=21.3 ~186m) from CSS-Kuiper (April 23.17-18p4)
K20B05O 2020 BO5 (arc=93 days, H=21.0 ~214m) from ATLAS Haleakala (April 22.40-43p6)
K20B04A 2020 BA4 (arc=92 days, H=20.2 ~309m) from MLS (April 22.17-19p4)
K20A02Z 2020 AZ2 (arc=107 days, H=21.2 ~195m) from PS1 (April 22.33-36p3)
K19Y07G 2019 YG7 (Q=4.977 AU, arc=125 days, H=18.6 ~645m) from MLS (April 22.13-15p4)
K19Y02D 2019 YD2 (arc=2 opp, H=21.7 ~155m) from MLS (April 22.31-33p3)
K19X01G 2019 XG1 (Q=4.163 AU, arc=2 opp, H=19.2 ~490m) from Tentlingen Obs. (April 21.95-98p4), MLS (April 22.27-28p4), and Herrenberg Obs. (April 22.85p4)
K19U10F 2019 UF10 (arc=12 days, H=19.1 ~513m) from program code "," (21) via Faulkes Telescope North (2019 Oct. 25.49p4)
K18K02L 2018 KL2 (arc=3 opp, H=21.7 ~155m) from PS1 (April 22.29-32p3 at w=22.2-4)
K17M04X 2017 MX4 (arc=4 opp, H=20.8 ~234m) from Astronomical Research Obs. Westfield (April 22.11-12p3 at V=22.2-3)
K17K04T 2017 KT4 (i=46.8°, arc=4 opp, H=17.2 ~1.23 km) from Schiaparelli Obs. (April 10.11-13p3)
K17J02K 2017 JK2 (q=0.293 AU, arc=3 opp, H=19.9 ~355m) from MLS (April 22.43-44p4 at G=21.3-22.1)
K17F90E 2017 FE90 (arc=3 opp, H=19.6 ~407m) from ATLAS Haleakala (April 22.37-39p4)
K17F65E 2017 FE65 (arc=4 opp, H=20.6 ~257m) from ARO Westfield (April 22.08-09p3 at V=22.0-22.3)
K16W01E 2016 WE1 (arc=4 opp, H=19.5 ~426m) from NEAT's Mt. Palomar telescope (2002 Nov. 23.26-28p2)
K15TE3X 2015 TX143 (arc=6 opp, H=19.8 ~371m) from Schiaparelli Obs. (April 9.92-94p3), the Catalina Sky Survey (CSS) (April 22.26-27p4), and Wishing Star Obs. (April 23.09-10p3)
K15L21K 2015 LK21 (Q=4.435 AU, arc=3 opp, H=17.4 ~1.12 km) from Steward Mt. Lemmon Sta. (April 23.48-49p4)
K15H10B 2015 HB10 (arc=4 opp, H=18.2 ~776m) from PS1 (April 22.43-46p4)
K15FX2P 2015 FP332 (i=36.5°, Q=4.790 AU, arc=5 opp, H=17.3 ~1.17 km) from Guidestar Obs. (April 23.01-03p3)
K15FB8T 2015 FT118 (arc=3 opp, H=20.5 ~269m) from MLS (April 22.34-36p4)
K14J54S 2014 JS54 (q=0.220 AU, arc=3 opp, H=21.2 ~195m) from Steward Mt. Lemmon Sta. (April 23.42-43p4)
K14H04O 2014 HO4 (arc=4 opp, H=19.2 ~490m) from Schiaparelli Obs. (April 12.11-14p3) and Guidestar Obs. (April 22.97-99p3)
K12TP9B 2012 TB259 (arc=2 opp, H=21.3 ~186m) from PS2 (April 22.30-34p3)
K12Q50E 2012 QE50 (arc=5 opp, H=18.9 ~562m) from PS1 (April 22.29-33p4)
K11O04V 2011 OV4 (arc=4 opp, H=18.6 ~645m) from PS1 (April 22.33-34p2 at w=22.4-7)
K11F02Z 2011 FZ2 (Q=4.750 AU, arc=4 opp, H=17.5 ~1.07 km) from ATLAS Mauna Loa (April 22.58-61p4)
K10X11D 2010 XD11 (q=0.326 AU, Q=4.098 AU, arc=4 opp, H=17.9 ~891m) from CSS (April 22.21-23p4)
K10F06C 2010 FC6 (arc=5 opp, H=20.1 ~323m) from PS2 (April 22.50-53p3)
K10E43J 2010 EJ43 (arc=4 opp, H=20.9 ~224m) from PS1 (April 22.43-47p4)
K09W07Z 2009 WZ7 (arc=3 opp, H=19.8 ~371m) from Xuyi Sta. (April 22.81-84p3)
K07H82X 2007 HX82 (Q=4.101 AU, arc=3 opp, H=20.4 ~282m) from PS1 (April 22.47-50p3)
K06X02F 2006 XF2 (arc=2 opp, H=19.9 ~355m) from PS2 (April 22.39-43p2)
K06P17Y 2006 PY17 (arc=6 opp, H=19.2 ~490m) from PS1 (April 22.35-37p2)
K04U01R 2004 UR1 (arc=3 opp, H=20.5 ~269m) from PS1 (April 22.38-41p3 at w=22.4)
K03SF4J 2003 SJ154 (arc=4 opp, H=18.9 ~562m) from MLS (April 22.24-26p4 at G=21.0-22.5)
K03J14N 2003 JN14 (arc=3 opp, H=19.5 ~426m) from PS1 (April 22.38-42p4)
K02S00Q 2002 SQ (arc=6 opp, H=19.6 ~407m) from MLS (April 22.33-36p4)
K01G02S 2001 GS2 (arc=3 opp, H=20.6 ~257m) from ATLAS Haleakala (April 22.41-43p4)
K00L00K 2000 LK (q=0.121 AU, Q=4.247 AU, arc=5 opp, H=18.3 ~741m) from PS1 (April 22.30-32p2 at w=22.0-22.2)
r9940 539940 2017 HW1 from ATLAS Mauna Loa (April 22.48-50p4) and Schiaparelli Obs. (April 22.99-04p5)
p9354 519354 2011 KR12 from PS1 (April 22.38-40p3)
p6155 516155 2016 DP from PS2 (April 22.25-28p3)
p3125 513125 1997 GC32 from Xuyi Sta. (April 22.68-71p3)
o0094 500094 2012 BC20 from Schiaparelli Obs. (April 10.05p2) and CSS (April 22.22-23p4)
n5323 495323 2014 JG78 from PS1 (April 22.52-55p3)
n4880 494880 2008 SQ7 from ATLAS Mauna Loa (April 22.41-43p4)
m3878 483878 2005 YS165 from CSS (April 22.34-36p2)
m3471 483471 2002 LS32 from PS1 (April 22.38-41p3 at w=22.2-4)
l1240 471240 2011 BT15 from PS1 (April 22.30-32p3 at w=22.1-3)
k8910 468910 2014 KQ76 from ATLAS Mauna Loa (April 22.52-54p4)
j5591 455591 2004 SV26 from PS1 (April 22.39-42p4 at w=22.1-4)
j0185 450185 2001 WJ2 from PS1 (April 22.48-52p3)
h6324 436324 2010 GZ6 from ATLAS Mauna Loa (April 22.46-48p4)
h3992 433992 2000 HD74 from ATLAS Mauna Loa (April 22.54-56p4) and Xuyi Sta. (April 22.79-80p2)
g5450 425450 2010 EV45 from ATLAS Mauna Loa (April 22.40-42p4)
f6584 416584 2004 JB12 from MLS (April 22.25-26p4 at G=21.9-22.2)
f6231 416231 2003 AJ73 from ATLAS Mauna Loa (April 22.31-33p4)
f3989 413989 2007 EL88 from Schiaparelli Obs. (April 9.96-97p4), Northolt Branch Obs. (April 21.95-96p2), and CSS (April 22.18-19p3)
f1655 411655 2011 WW4 from PS1 (April 22.33-37p3)
d2704 392704 2012 AE1 from PS1 (April 22.38-40p6)
c8838 388838 2008 EZ5 from Schiaparelli Obs. (April 10.01-02p3)
c7505 387505 1998 KN3 from PS1 (April 22.28-32p4 at w=21.9-22.5)
b3428 373428 1999 TC5 from ATLAS Mauna Loa (April 22.40-43p4) and Herrenberg Obs. (April 22.86-87p3)
a8664 368664 2005 JA22 from MLS (April 22.33-36p4)
a3067 363067 2000 CO101 from MLS (April 22.13-15p4)
Y9063 349063 2006 XA from WISE (April 21.15p1, 21.68p1, 21.74p2, 21.81p1, 21.87p2, 22.00p1 & 22.07p1) and ATLAS Haleakala (April 22.57-59p4)
X3555 333555 2005 VY17 from Schiaparelli Obs. (April 10.06-07p3) and CSS (April 22.32-34p4)
X0659 330659 2008 GG2 from MLS (April 22.34-36p4)
R7142 277142 2005 LG8 from PS1 (April 22.38-41p4)
R6732 276732 2004 EV9 from Schiaparelli Obs. (April 9.99-00p3)
R6274 276274 2002 SS41 from ATLAS Mauna Loa (April 22.41-44p4)
R5976 275976 2001 XV10 from PS1 (April 22.43-46p8)
R5714 275714 2000 YH4 from MLS (April 22.36-38p4)
Q5196 265196 2004 BW58 from PS1 (April 22.54-56p2 at w=21.7-22.2)
P2793 252793 2002 FW5 from ATLAS Mauna Loa (April 22.42-45p5)
P0614 250614 2005 GG from PS2 (April 22.44-48p7)
N8456 238456 2004 RK from PS1 (April 22.58-61p4)
M8368 228368 2000 WK10 from Schiaparelli Obs. (April 10.03-04p3)
I9973 189973 2003 XE11 from PS1 (April 22.43-47p4)
G9675 169675 2002 JM97 from ATLAS Haleakala (April 22.57-59p3)
G3694 163694 2003 DP13 from MLS (April 22.15-17p4)
G3692 163692 2003 CY18 from ATLAS Mauna Loa (April 22.36-38p4)
G3679 163679 2002 XG84 from PS1 (April 22.38-42p4)
G3373 163373 2002 PZ39 from program code 1 via UAS-ISON Obs. (Feb. 13.17p1)
G2157 162157 1999 CV8 from ARO Westfield (April 22.39-40p4 at V=22.1-4) and PS1 (April 22.58-61p3 at w=21.9-22.4)
F9635 159635 2002 CZ46 from MLS (April 22.31-33p4)
F9608 159608 2002 AC2 from ATLAS Mauna Loa (April 22.61-62p4)
F9533 159533 2001 HH31 from MLS (April 22.29-31p4)
F5341 155341 2006 SA218 from PS1 (April 22.59-62p4)
F4229 154229 2002 JN97 from Xuyi Sta. (April 22.69-71p3)
F4029 154029 2002 CY46 from MLS (April 22.15-17p4)
F4020 154020 2002 CA10 from MLS (April 22.33-36p4 at G=21.3-22.6)
E4861 144861 2004 LA12 from PS2 (April 22.35-38p8)
E4411 144411 2004 EW9 from MASTER-II Sutherland (April 21.76p1 & 21.80p1)
E3527 143527 2003 EN16 from MLS (April 22.18-19p4)
E2555 142555 2002 TB58 from ATLAS Haleakala (April 22.39-42p4)
E1670 141670 2002 JS100 from MLS (April 22.27-28p3)
E1525 141525 2002 FV5 from Schafsweide Obs. (April 19.94-95p2, 20.90-91p2 & 21.91-92p2)
E1053 141053 2001 XT1 from PS1 (April 22.42-46p4) and ATLAS Haleakala (April 22.45-48p4)
D8847 138847 2000 VE62 from Pin Oak Obs. (April 22.08p1 & 22.13-14p2)
D8524 138524 2000 OJ8 from PS1 (April 22.38-42p4)
D7064 137064 1998 WP5 from Saarbruecken Rastpfuhl Obs. (April 22.86-87p2)
D6618 136618 1994 CN2 from PS1 (April 22.29-31p3)
B5052 115052 2003 RD6 from Tentlingen Obs. (April 21.90-93p4), MLS (April 22.20-21p4), and ATLAS Mauna Loa (April 22.37-39p4)
99935 99935 2002 AV4 from ATLAS Haleakala (April 22.42-45p8)
90367 90367 2003 LC5 from Schiaparelli Obs. (April 10.09-10p3) and CSS (April 22.26-27p4)
90075 90075 2002 VU94 from MLS (April 22.13-14p4)
89830 89830 2002 CE from CSS (April 22.24-25p4)
86067 86067 1999 RM28 from CSS (April 22.33-34p4)
68063 68063 2000 YJ66 from PS1 (April 22.33-37p4)
54686 54686 2001 DU8 from ATLAS Mauna Loa (April 22.44-47p4)
52768 52768 1998 OR2 from UAS-ISON Obs./code 1 (April 13.13-15p3 & 14.14-18p5), Wickede Obs. (April 20.84p9, 21.83-84p8 & 22.85p6), Pin Oak Obs. (April 22.07-12p3), MLS (April 22.16p1), program code 1 via Kuban State Univ. Obs. (April 22.71-92p44), Saarbruecken Rastpfuhl Obs. (April 22.81p2), San Vito Obs. (April 22.82-83p8), Compustar Obs. (April 22.87-91p3), Landehen Obs. (April 22.87-89p5), West Park Obs. (April 22.88-90p5), Clixby Obs. (April 22.88-89p4), and Wishing Star Obs. (April 23.06-07p3)
39796 39796 1997 TD from MLS (April 22.22-24p4)
37655 37655 Illapa (1994 PM) from PS1 (April 22.58-60p3)
34613 34613 2000 UR13 from ATLAS Mauna Loa (April 22.30-32p4)
30825 30825 1990 TG1 from ATLAS Mauna Loa (April 22.25-27p4)
26760 26760 2001 KP41 from MLS (April 22.25-26p4)
21277 21277 1996 TO5 from MLS (April 22.36-38p4)
19764 19764 2000 NF5 from ATLAS Haleakala (April 22.60-62p4)
18172 18172 2000 QL7 from MLS (April 22.15-17p4) and ATLAS Mauna Loa (April 22.32-34p4)
11405 11405 1999 CV3 from ATLAS Mauna Loa (April 22.28-29p4)
11284 11284 Belenus (1990 BA) from ATLAS Haleakala (April 22.49-51p4)
11066 11066 Sigurd (1992 CC1) from Herrenberg Obs. (April 22.82p3)
09400 9400 1994 TW1 from CSS (April 22.18-19p4)
08566 8566 1996 EN from Tentlingen Obs. (April 21.85-88p4) and ATLAS Mauna Loa (April 22.33-35p4)
07358 7358 Oze (1995 YA3) from PS1 (April 22.28-32p4)
06047 6047 1991 TB1 from ATLAS Mauna Loa (April 22.31-34p5)
05660 5660 1974 MA from Campo dos Amarais Obs. (April 22.03-04p3)
05626 5626 1991 FE from ATLAS Mauna Loa (April 22.32-34p4)
04954 4954 Eric (1990 SQ) from ATLAS Haleakala (April 22.42-44p4)
03352 3352 McAuliffe (1981 CW) from ATLAS Haleakala (April 22.60-61p4)
01981 1981 Midas (1973 EA) from CSS (April 22.15-17p3)
01685 1685 Toro (1948 OA) from ATLAS Haleakala (April 22.61-62p4)
01627 1627 Ivar (1929 SH) from Schiaparelli Obs. (April 9.91-95p4) and ATLAS Mauna Loa (April 22.31-33p4)

MPEC 2020-H128 - "11:49 UT" - 2011 HO4

K11H04O 2011 HO4 (H=20.5 ~269m) from PS2 (April 16.56-59p3), PS1 (April 22.59-61p3), and CSS-Kuiper (April 23.48p4)

MPEC 2020-H127 - "11:41 UT" - 2020 HQ4

K20H04Q 2020 HQ4 (risk listed, Earth MOID=0.7 LD, H=26.9 ~14m, close passer) was picked up at 0335 UT on 22 April by MLS, observing it at April 22.15-17p4 and 23.19-21p4. This detection was confirmed by Steward Mt. Lemmon Sta. (April 22.21-26p8 & 23.13-14p4), Schwarzschild Obs. (April 22.83p4), Great Shefford Obs. (April 22.85-88p4), Visnjan Obs. (April 22.86-87p6), Schiaparelli Obs. (April 22.88-89p2), and Tebbutt Obs. (April 23.14-16p3).

MPEC 2020-H126 - "11:40 UT" - 2020 HP4

K20H04P 2020 HP4 (Earth MOID=6.0 LD, H=26.6 ~16m) was picked up at 0846 UT on 22 April by MLS, observing it at April 22.37-38p4. This detection was confirmed by Steward Mt. Lemmon Sta. (April 22.40-43p7 & 23.17p4), CSS-Kuiper (April 22.48p4), KLENOT (April 22.84p8 & 22.89p5), Oberfrauendorf Obs. (April 22.85p3), Schwarzschild Obs. (April 22.86p3), Rokycany Obs. (April 22.86-87p4), Farra d'Isonzo Obs. (April 22.87-88p3), Guidestar Obs. (April 22.87-88p3), ROASTERR-1 (April 22.87-89p3), Pascoli Obs. (April 22.91-92p2), Hoyerswerda Obs. (April 22.91p3), Northolt Branch Obs. (April 22.93p2), Great Shefford Obs. (April 22.93-94p5), Schiaparelli Obs. (April 22.94p3), Visnjan Obs. (April 22.96-97p5), Clixby Obs. (April 23.00p3), Tebbutt Obs. (April 23.26-28p3), and Aorangi Iti Obs. (April 23.40p4).

MPEC 2020-H125 - "10:30 UT" - 2020 HO4

K20H04O 2020 HO4 (small asteroid, H=24.8 ~37m) was picked up at 0549 UT on 22 April by MLS, observing it at April 22.24-26p4. This detection was confirmed by PS2 (April 21.26-28p3), Steward Mt. Lemmon Sta. (April 22.33-34p4 & 23.14-15p4), Schwarzschild Obs. (April 22.87p3), and Visnjan Obs. (April 22.94p2).

MPEC 2020-H124 - "10:30 UT" - 2020 HN4

K20H04N 2020 HN4 (Earth MOID=8.9 LD, H=25.5 ~27m) was picked up at 0900 UT on 21 April by MLS, observing it at April 21.38-39p3. This detection was confirmed by Steward Mt. Lemmon Sta. (April 21.42p4, 21.48-49p4, 22.43-44p4 & 23.28-29p2), PS1 (April 21.53-56p4), KLENOT (April 21.97p5), Schwarzschild Obs. (April 21.97p3 & 23.07p3), Great Shefford Obs. (April 22.01p1 & 22.06p1), and Visnjan Obs. (April 22.04p4).

MPEC 2020-H123 - "10:29 UT" - 2020 HM4

K20H04M 2020 HM4 (risk listed, Earth MOID=0.4 LD, H=24.6 ~41m) was picked up at 0901 UT on 20 April by PS1, observing it at April 20.38-41p4 at w=21.31-22.24 and 22.38-42p4 at w=21.33-22.11. This detection was confirmed by Steward Mt. Lemmon Sta. (April 23.25-26p4).

MPEC 2020-H122 - "10:27 UT" - 2020 HL4

K20H04L 2020 HL4 (small asteroid, H=24.5 ~43m) was picked up at 1131 UT on 22 April by PS1, observing it at April 20.55-56p2 and 22.48-52p3. This detection was confirmed by Visnjan Obs. (April 23.04-05p4), Schwarzschild Obs. (April 23.06p3), and Steward Mt. Lemmon Sta. (April 23.35p3).

MPEC 2020-H121 - "10:25 UT" - 2020 HK4

K20H04K 2020 HK4 (Q=4.527 AU, H=20.1 ~323m) was picked up at 0830 UT on 19 April by PS1, observing it at April 19.35-39p3 at w=22.15-28, 20.32-34p3 at G=21.9-22.3, and 22.30-32p3 at w=22.22-37. This detection was confirmed by PS2 (April 19.44-48p4 at G=21.4-22.8) and ARO Westfield (April 22.17-19p4 at V=22.4-7).

MPEC 2020-H120 - "10:23 UT" - 2020 HJ4

K20H04J 2020 HJ4 (risk listed, Earth MOID=0.1 LD, H=20.0 ~339m) was picked up at 1106 UT on 19 April by PS1, observing it at April 19.46-50p4 at w=21.94-22.74, 20.37-41p4 at w=21.74-22.20, 21.38-40p3 at w=21.70-22.13, and 22.39-41p3 at w=22.26-34. This detection was confirmed by CSS-Kuiper (April 21.29-31p4 at G=21.8-22.7) and ARO Westfield (April 22.23p3 at V=22.2-3).

MPEC 2020-H119 - "10:21 UT" - 2020 HH4

K20H04H 2020 HH4 (small asteroid, H=22.2 ~123m) was picked up at 1302 UT on 20 April by PS1, observing it at April 20.54-57p3. This detection was confirmed by Schwarzschild Obs. (April 21.10p3 at V=19.8-20.1, 22.06p2 at V=21.3-7 & 23.08p3 at V=22.1-23.5), Steward Mt. Lemmon Sta. (April 21.38p4), ARO Westfield (April 22.37-38p4), and Visnjan Obs. (April 23.11-12p3).

MPEC 2020-H118 - "10:18 UT" - 2020 HG4

K20H04G 2020 HG4 (small asteroid, H=26.2 ~19m) was picked up at 0801 UT on 22 April by MLS, observing it at April 22.33-36p4. This detection was confirmed by PS2 (April 19.45-48p4 & 21.40-44p4), Steward Mt. Lemmon Sta. (April 22.42-43p4 & 23.22p4), and Schwarzschild Obs. (April 22.92p3).

MPEC 2020-H117 - "10:17 UT" - 2020 HF4

K20H04F 2020 HF4 (Earth MOID=0.4 LD, H=27.5 ~11m) was picked up at 1100 UT on 18 April by PS2, observing it at April 18.46-48p3. This detection was confirmed by PS1 (April 22.52-56p4), ESA OGS (April 22.99p2), Schwarzschild Obs. (April 23.05-06p3 at V=21.7-23.5), Visnjan Obs. (April 23.07-08p5), and MLS (April 23.40-41p3).

MPEC 2020-H116 - "10:14 UT" - 2020 HE4

K20H04E 2020 HE4 (small asteroid, H=23.7 ~62m) was picked up at 0732 UT on 21 April by PS2, observing it at April 16.36-38p3 and 21.31-33p3. This detection was confirmed by ARO Westfield (April 22.15-16p3), PS1 (April 22.34-37p3), Schwarzschild Obs. (April 22.89-90p3), Visnjan Obs. (April 22.95-96p3), and Steward Mt. Lemmon Sta. (April 23.24p3).

MPEC 2020-H115 - "10:09 UT" - 2020 HD4

K20H04D 2020 HD4 (small asteroid, H=24.7 ~39m) was picked up at 1014 UT on 20 April by PS2, observing it at April 20.43-45p3. This detection was confirmed by PS1 (April 15.43-44p2 & 19.43-44p2), Schwarzschild Obs. (April 20.94p3 & 21.93-94p3), Steward Mt. Lemmon Sta. (April 21.41p3), and Visnjan Obs. (April 22.98p3).

MPEC 2020-H114 - "01:35 UT" - 2020 HY3

K20H03Y 2020 HY3 (small asteroid, H=23.1 ~81m) was picked up at 1135 UT on 21 April by PS1, observing it at April 18.51-53p2 and 21.48-52p4. This detection was confirmed by PS2 (April 17.60-62p2), Steward Mt. Lemmon Sta. (April 22.32p4), and Visnjan Obs. (April 23.01-02p3).

MPEC 2020-H113 - "00:08 UT" - 2020 HX3

K20H03X 2020 HX3 (Earth MOID=0.4 LD, H=27.0 ~13m) was picked up at 1117 UT on 19 April by PS1, observing it at April 19.47-51p3 and 22.44-46p3. This detection was confirmed by ATLAS Haleakala (April 22.46-49p4), Rokycany Obs. (April 22.88p3), KLENOT (April 22.93p6), Pascoli Obs. (April 22.94-95p3), Great Shefford Obs. (April 22.95-96p4), and Visnjan Obs. (April 22.99p7).

MPEC 2020-H112 - "00:05 UT" - 2020 HW3

K20H03W 2020 HW3 (small asteroid, i=45.5°, H=22.0 ~135m) was picked up at 1203 UT on 20 April by ATLAS Mauna Loa, observing it at April 20.50-53p7. This detection was confirmed by ATLAS Haleakala (April 22.52-54p4), JAXA Space Tracking & Communications Center (JAXA STCC) (April 22.71p3), Oberfrauendorf Obs. (April 22.92p7), Rokycany Obs. (April 22.93p5), ROASTERR-1 (April 22.97p4), Pascoli Obs. (April 22.97-98p5), and KLENOT (April 22.97p6).

Observers on 23 April '20

A total of 56 observers appear in today's MPECs.

Code	Observer / observatory
`R57`	Aorangi Iti Obs. in New Zealand, 2 in MPECs 2020-H126 & 2020-H129 -- 2020 HX3, 2020 HP4
`H21`	Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2020-H116, 2020-H119, 2020-H120, 2020-H121 & 2020-H129 -- 2020 HK4, 2020 HJ4, 2020 HH4, 2020 HE4, 2017 MX4, 2017 FE65, 162157
`T05`	ATLAS Haleakala in Hawaii, 21 in MPECs 2020-H112, 2020-H113 & 2020-H129 -- 2020 HX3, 2020 HW3, 2020 HF1, 2020 GS, 2020 FM6, 2020 DM4, 2020 BO5, 2017 FE90, 2014 JO25, 2006 FH36, 2001 GS2, 99935, 349063, 19764, 169675, 142555, 141053, 11284, 4954, 3352, 1685
`T08`	ATLAS Mauna Loa in Hawaii, 26 in MPECs 2020-H112 & 2020-H129 -- 2020 HW3, 2020 GF3, 2011 FZ2, 54686, 539940, 494880, 468910, 436324, 433992, 425450, 416231, 388945, 373428, 34613, 30825, 276274, 252793, 18172, 163692, 159608, 115052, 11405, 8566, 6047, 5626, 1627
`X74`	Campo dos Amarais Obs., 1 in MPEC 2020-H129 -- 5660
`703`	Catalina Sky Survey (CSS) in Arizona, 11 in MPEC 2020-H129 -- 2015 TX143, 2010 XD11, 90367, 89830, 86067, 500094, 483878, 413989, 333555, 9400, 1981
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 8 in MPECs 2020-H120, 2020-H126, 2020-H128, 2020-H129, 2020-H130, 2020-H131 & 2020-H132 -- 2020 HU4, 2020 HT4, 2020 HR4, 2020 HP4, 2020 HJ4, 2020 FT3, 2020 BP13, 2011 HO4
`Z99`	Clixby Obs. in England, 2 in MPECs 2020-H126 & 2020-H129 -- 2020 HP4, 52768
`L59`	Compustar Obs., 1 in MPEC 2020-H129 -- 52768
`W845`	Lori Allen via DECam in Chile, 1 in MPEC 2020-H132 -- 2020 HU4
`K87`	Dettelbach Vineyard Obs. in Germany, 9 in MPEC 2020-H129 -- 2020 HY, 2020 HW3, 2020 HU3, 2020 HT3, 2020 GF3, 2020 GD2, 2020 FO2, 2020 FA7, 2020 FA3
`J04`	ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2020-H117 & 2020-H129 -- 2020 HX3, 2020 HF4
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2020-H126 -- 2020 HP4
`F65,`	program code "," (21) via Faulkes Telescope North in Hawaii, 1 in MPEC 2020-H129 -- 2019 UF10
`J95`	Great Shefford Obs. in England, 5 in MPECs 2020-H113, 2020-H124, 2020-H126, 2020-H127 & 2020-H129 -- 2020 HX3, 2020 HU3, 2020 HQ4, 2020 HP4, 2020 HN4
`A17`	Guidestar Obs. in Germany, 3 in MPECs 2020-H126 & 2020-H129 -- 2020 HP4, 2015 FP332, 2014 HO4
`240`	Herrenberg Obs. in Germany, 4 in MPEC 2020-H129 -- 2019 XG1, 373428, 190166, 11066
`C43`	Hoyerswerda Obs. in Germany, 1 in MPEC 2020-H126 -- 2020 HP4
`Q62`	iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-H129 -- 2020 FR5
`P93`	JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2020-H112 -- 2020 HW3
`1861`	program code 1 via Kitab Obs., 1 in MPEC 2020-H129 -- 2020 FM6
`246`	KLENOT in the Czech Republic, 6 in MPECs 2020-H112, 2020-H113, 2020-H124, 2020-H126 & 2020-H129 -- 2020 HX3, 2020 HW3, 2020 HU2, 2020 HP4, 2020 HN4, 2020 GY2
`C401`	program code 1 via Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-H129 -- 52768
`Z43`	Landehen Obs., 1 in MPEC 2020-H129 -- 52768
`K38`	M57 Obs. in Italy, 1 in MPEC 2020-H129 -- 2020 HX3
`K95`	MASTER-II Sutherland in South Africa, 1 in MPEC 2020-H129 -- 144411
`B67`	Mirasteilas Obs. in Switzerland, 1 in MPEC 2020-H129 -- 2020 FA3
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 40 in MPECs 2020-H117, 2020-H118, 2020-H124, 2020-H125, 2020-H126, 2020-H127, 2020-H129, 2020-H130 & 2020-H131 -- 2020 HT4, 2020 HR4, 2020 HQ4, 2020 HP4, 2020 HO4, 2020 HN4, 2020 HG4, 2020 HF4, 2020 HF3, 2020 HF2, 2020 HC2, 2020 FR6, 2020 EM, 2020 BA4, 2019 YG7, 2019 YD2, 2019 XG1, 2017 JK2, 2015 FT118, 2003 SJ154, 2002 SQ, 90075, 52768, 416584, 39796, 368664, 363067, 330659, 275714, 26760, 21277, 18172, 163694, 159635, 159533, 154029, 154020, 143527, 141670, 115052
`644`	NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2020-H129 -- 2016 WE1
`Z80`	Northolt Branch Obs. in England, 2 in MPECs 2020-H126 & 2020-H129 -- 2020 HP4, 413989
`G34`	Oberfrauendorf Obs. in Germany, 2 in MPECs 2020-H112 & 2020-H126 -- 2020 HW3, 2020 HP4
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 67 in MPECs 2020-H113, 2020-H114, 2020-H115, 2020-H116, 2020-H117, 2020-H119, 2020-H120, 2020-H121, 2020-H122, 2020-H123, 2020-H124, 2020-H128, 2020-H129, 2020-H130, 2020-H132 & 2020-H133 -- 2020 HY3, 2020 HX3, 2020 HU4, 2020 HU2, 2020 HU, 2020 HR4, 2020 HR, 2020 HO2, 2020 HN4, 2020 HN1, 2020 HN, 2020 HM4, 2020 HM2, 2020 HL4, 2020 HL, 2020 HK4, 2020 HJ4, 2020 HJ1, 2020 HH4, 2020 HF4, 2020 HE4, 2020 HE, 2020 HD4, 2020 GS, 2020 GN3, 2020 GK3, 2020 FF6, 2020 FF5, 2020 BR16, 2020 AZ2, 2019 XL1, 2019 TF2, 2018 KL2, 2015 HB10, 2012 QE50, 2011 OV4, 2011 HO4, 2010 EJ43, 2007 HX82, 2006 PY17, 2004 UR1, 2003 JN14, 2000 LK, 68063, 519354, 495323, 483471, 471240, 455591, 450185, 411655, 392704, 387505, 37655, 277142, 275976, 265196, 238456, 190166, 189973, 163679, 162157, 155341, 141053, 138524, 136618, 7358
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 17 in MPECs 2020-H114, 2020-H115, 2020-H116, 2020-H117, 2020-H118, 2020-H121, 2020-H125, 2020-H128, 2020-H129 & 2020-H133 -- 2020 HY3, 2020 HR1, 2020 HO4, 2020 HN2, 2020 HK4, 2020 HG4, 2020 HF4, 2020 HE4, 2020 HD4, 2020 GN3, 2012 TB259, 2011 HO4, 2010 FC6, 2006 XF2, 516155, 250614, 144861
`K63`	Pascoli Obs. in Italy, 3 in MPECs 2020-H112, 2020-H113 & 2020-H126 -- 2020 HX3, 2020 HW3, 2020 HP4
`A53`	Peschiera del Garda Obs. in Italy, 2 in MPEC 2020-H129 -- 2020 GD2, 2020 FA7
`V93`	Pin Oak Obs., 3 in MPEC 2020-H129 -- 52768, 388945, 138847
`D29`	Purple Mtn. Obs. Xuyi Station in China, 5 in MPEC 2020-H129 -- 2020 FE6, 2009 WZ7, 513125, 433992, 154229
`L04`	ROASTERR-1 in Romania, 2 in MPECs 2020-H112 & 2020-H126 -- 2020 HW3, 2020 HP4
`K61`	Rokycany Obs. in the Czech Republic, 3 in MPECs 2020-H112, 2020-H113 & 2020-H126 -- 2020 HX3, 2020 HW3, 2020 HP4
`L40`	Saarbruecken Rastpfuhl Obs., 3 in MPEC 2020-H129 -- 2020 GD2, 52768, 137064
`233`	San Vito Obs. in Italy, 1 in MPEC 2020-H129 -- 52768
`C95`	SATINO-1 in France, 1 in MPEC 2020-H129 -- 2020 BK3
`L38`	Schafsweide Obs., 1 in MPEC 2020-H129 -- 141525
`204`	Schiaparelli Obs. in Italy, 26 in MPECs 2020-H126, 2020-H127 & 2020-H129 -- 2020 HT3, 2020 HQ4, 2020 HP4, 2020 GT2, 2020 GN2, 2020 GM2, 2020 GH2, 2020 GF2, 2020 GD2, 2020 GB2, 2020 GA3, 2020 GA2, 2020 FX5, 2020 FX3, 2017 KT4, 2015 TX143, 2014 HO4, 90367, 539940, 500094, 413989, 388838, 333555, 276732, 228368, 1627
`033`	Schwarzschild Obs. in Germany, 15 in MPECs 2020-H115, 2020-H116, 2020-H117, 2020-H118, 2020-H119, 2020-H122, 2020-H124, 2020-H125, 2020-H126, 2020-H127, 2020-H129 & 2020-H131 -- 2020 HX3, 2020 HU2, 2020 HT4, 2020 HQ4, 2020 HQ3, 2020 HP4, 2020 HO4, 2020 HN4, 2020 HM1, 2020 HL4, 2020 HH4, 2020 HG4, 2020 HF4, 2020 HE4, 2020 HD4
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 22 in MPECs 2020-H114, 2020-H115, 2020-H116, 2020-H118, 2020-H119, 2020-H122, 2020-H123, 2020-H124, 2020-H125, 2020-H126, 2020-H127, 2020-H129 & 2020-H133 -- 2020 HY3, 2020 HU1, 2020 HT1, 2020 HQ4, 2020 HP4, 2020 HP, 2020 HO4, 2020 HO1, 2020 HN4, 2020 HM4, 2020 HM, 2020 HL4, 2020 HJ2, 2020 HH4, 2020 HG4, 2020 HE4, 2020 HE2, 2020 HD4, 2020 GN3, 2020 GD, 2015 LK21, 2014 JS54
`858`	Tebbutt Obs. in New Mexico, 2 in MPECs 2020-H126 & 2020-H127 -- 2020 HQ4, 2020 HP4
`A16`	Tentlingen Obs. in Switzerland, 4 in MPEC 2020-H129 -- 2019 XG1, 388945, 115052, 8566
`V261`	program code 1 via UAS-ISON Obs., 2 in MPEC 2020-H129 -- 52768, 163373
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2020-H129 -- 2019 GO, 2019 CT4
`L01`	Visnjan Obs. in Croatia, 13 in MPECs 2020-H113, 2020-H114, 2020-H115, 2020-H116, 2020-H117, 2020-H119, 2020-H122, 2020-H124, 2020-H125, 2020-H126, 2020-H127, 2020-H129 & 2020-H131 -- 2020 HY3, 2020 HX3, 2020 HU2, 2020 HT4, 2020 HQ4, 2020 HP4, 2020 HO4, 2020 HN4, 2020 HL4, 2020 HH4, 2020 HF4, 2020 HE4, 2020 HD4
`Z92`	West Park Obs. in England, 1 in MPEC 2020-H129 -- 52768
`G33`	Wickede Obs. in Germany, 1 in MPEC 2020-H129 -- 52768
`C51`	WISE in Earth polar orbit, 1 in MPEC 2020-H129 -- 349063
`I15`	Wishing Star Obs. in Rhode Island, 4 in MPEC 2020-H129 -- 2020 FA7, 2015 TX143, 52768, 190166
`Q78`	Woogaroo Obs., 1 in MPEC 2020-H129 -- 2020 DM4

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

Impact Risk Monitoring on 23 April '20

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2359 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 HT4	JPL Sentry	1730	2035-2100	3	8.19117e-07	-5.86	-5.89	0	JPL: Computed at 07:27 today Pacific time based on 17 observations spanning 1.6601 days (2020-Apr-21.26935 to 2020-Apr-22.929478). Diameter approximately 0.028 km. from weighted mean H=25.45.
2020 HT4	NEODyS	1730	2035	2	6.76e-06	-4.96	-4.97	0	NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2020-04-21.270 to 2020-04-22.930."

2020 HQ4	JPL Sentry	1730	2059-2120	50	0.0001078615681	-5.12	-5.59	0	JPL: Computed at 06:13 today Pacific time based on 39 observations spanning 1.0589 days (2020-Apr-22.14953 to 2020-Apr-23.20842). Diameter approximately 0.014 km. from weighted mean H=26.85.
2020 HQ4	NEODyS	1730	2059-2118	133	1.41e-04	-5.03	-5.57	0	NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2020-04-22.150 to 2020-04-23.209."

2020 HM4	JPL Sentry	1730	2059-2116	4	8.256e-07	-5.77	-6.22	0	JPL: Computed at 04:29 today Pacific time based on 12 observations spanning 2.8819 days (2020-Apr-20.3758 to 2020-Apr-23.25765). Diameter approximately 0.037 km. from weighted mean H=24.85.
2020 HM4	NEODyS	1730	2059-2116	5	1.38e-06	-5.57	-6.05	0	NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2020-04-20.377 to 2020-04-23.258."

2020 HJ4	JPL Sentry	1730	2042-2118	92	1.02647592e-05	-2.67	-3.63	0	JPL: Computed at 04:34 today Pacific time based on 21 observations spanning 2.9472 days (2020-Apr-19.463036 to 2020-Apr-22.410214). Diameter approximately 0.315 km. from weighted mean H=20.16.
2020 HJ4	NEODyS	1730	2042-2118	97	7.79e-06	-2.79	-3.66	0	NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2020-04-19.464 to 2020-04-22.411."

2020 HN	JPL Sentry	1730	2055-2119	19	3.1914241e-05	-6.34	-6.54	0	JPL: Computed at 08:05 today Pacific time based on 29 observations spanning 6.1373 days (2020-Apr-16.27939 to 2020-Apr-22.416691). Diameter approximately 0.006 km. from weighted mean H=28.58.
2020 HN	NEODyS	1730	2055-2118	51	2.31e-05	-6.56	-6.97	0	NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2020-04-16.280 to 2020-04-22.417."

2020 HE	JPL Sentry	1730	R E M O V E D						JPL: Risk listing removed at 1433 UTC today
2020 HE	NEODyS	1730	R E M O V E D						-

2020 GA3	JPL Sentry	1730	2054-2119	17	4.502756e-06	-5.45	-5.81	0	JPL: Computed at 07:57 today Pacific time based on 36 observations spanning 3.0309 days (2020-Apr-15.41021 to 2020-Apr-18.44112). Diameter approximately 0.033 km. from weighted mean H=25.05.
2020 GA3	NEODyS	1730	2054-2118	16	1.13e-06	-6.00	-6.56	0	NEODyS: "Based on 36 optical observations (of which 1 are rejected as outliers) from 2020-04-15.411 to 2020-04-18.442."

2020 GY2	JPL Sentry	1730	2093-2118	4	8.4217e-07	-5.49	-5.59	0	JPL: Computed at 07:30 today Pacific time based on 60 observations spanning 7.5990 days (2020-Apr-15.34915 to 2020-Apr-22.94816). Diameter approximately 0.064 km. from weighted mean H=23.62.
2020 GY2	NEODyS	1730	2093-2117	5	5.34e-07	-5.67	-5.68	0	NEODyS: "Based on 60 optical observations (of which 0 are rejected as outliers) from 2020-04-15.350 to 2020-04-22.949."

2020 FT3	JPL Sentry	1730	2089-2119	13	3.691599e-05	-3.78	-3.80	0	JPL: Computed at 07:33 today Pacific time based on 36 observations spanning 31.845 days (2020-Mar-22.30472 to 2020-Apr-23.14969). Diameter approximately 0.080 km. from weighted mean H=23.13.
2020 FT3	NEODyS	1730	2089-2118	28	2.31e-05	-4.00	-4.05	0	NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2020-03-22.306 to 2020-04-23.150."

2020 BK3	JPL Sentry	1730	2091-2105	6	6.149804e-05	-5.33	-5.34	0	JPL: Computed at 07:35 today Pacific time based on 99 observations spanning 28.090 days (2020-Jan-22.395303 to 2020-Feb-19.485235). Diameter approximately 0.014 km. from weighted mean H=26.93.
2020 BK3	NEODyS	1730	2091-2105	7	5.98e-05	-5.35	-5.36	0	NEODyS: "Based on 99 optical observations (of which 0 are rejected as outliers) from 2020-01-22.396 to 2020-02-19.486."

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 23 April '20

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

2033	Grabbed MPEC 2020-H133 - 2020 GN3 - see above
1927	Grabbed MPEC 2020-H132 - 2020 HU4 - see above
1730	Noted that JPL Sentry has updated its 2020 BK3 risk assessment - see above Noted that NEODyS has updated its 2020 BK3 risk assessment - see above Noted that JPL Sentry has updated its 2020 FT3 risk assessment - see above Noted that NEODyS has updated its 2020 FT3 risk assessment - see above Noted that JPL Sentry has updated its 2020 GA3 risk assessment - see above Noted that NEODyS has updated its 2020 GA3 risk assessment - see above Noted that JPL Sentry has updated its 2020 GY2 risk assessment - see above Noted that NEODyS has updated its 2020 GY2 risk assessment - see above Noted that JPL Sentry has removed 2020 HE as an impact risk - see above Noted that NEODyS has removed 2020 HE as an impact risk - see above Noted that JPL Sentry has posted 2020 HJ4 as an impact risk - see above Noted that NEODyS has posted 2020 HJ4 as an impact risk - see above Noted that JPL Sentry has posted 2020 HM4 as an impact risk - see above Noted that NEODyS has posted 2020 HM4 as an impact risk - see above Noted that JPL Sentry has updated its 2020 HN risk assessment - see above Noted that NEODyS has updated its 2020 HN risk assessment - see above Noted that JPL Sentry has posted 2020 HQ4 as an impact risk - see above Noted that NEODyS has posted 2020 HQ4 as an impact risk - see above Noted that JPL Sentry has posted 2020 HT4 as an impact risk - see above Noted that NEODyS has posted 2020 HT4 as an impact risk - see above Grabbed MPEC 2020-H115 - 2020 HD4 - see above Grabbed MPEC 2020-H116 - 2020 HE4 - see above Grabbed MPEC 2020-H117 - 2020 HF4 - see above Grabbed MPEC 2020-H118 - 2020 HG4 - see above Grabbed MPEC 2020-H119 - 2020 HH4 - see above Grabbed MPEC 2020-H120 - 2020 HJ4 - see above Grabbed MPEC 2020-H121 - 2020 HK4 - see above Grabbed MPEC 2020-H122 - 2020 HL4 - see above Grabbed MPEC 2020-H123 - 2020 HM4 - see above Grabbed MPEC 2020-H124 - 2020 HN4 - see above Grabbed MPEC 2020-H125 - 2020 HO4 - see above Grabbed MPEC 2020-H126 - 2020 HP4 - see above Grabbed MPEC 2020-H127 - 2020 HQ4 - see above Grabbed MPEC 2020-H128 - 2011 HO4 - see above Grabbed MPEC 2020-H129 - Daily Orbit Update - see above Grabbed MPEC 2020-H130 - 2020 HR4 - see above Grabbed MPEC 2020-H131 - 2020 HT4 - see above
0142	Grabbed MPEC 2020-H114 - 2020 HY3 - see above
0009	Grabbed MPEC 2020-H112 - 2020 HW3 - see above Grabbed MPEC 2020-H113 - 2020 HX3 - see above

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