2020-12-22 Tracking News

Contents on 22 December '20

IAU Minor Planet Center
- NEOCP Activity -- 44 listings
- New MPECs -- seventeen MPECs
Observers -- 33 observers
Impact Risk Monitoring -- fifteen objects
Chronology

CHANGES COMING: The Asteroid/Comet Connection Web site will soon focus completely on Earth's Busy Neighborhood reporting. Sometime on or soon after Sunday, December 27th, much of the site will be retired.* The Tracking News will be discontinued and taken down entirely** along with its supporting timeline pages, the archives of its predecessor online publication, Major News About Minor Objects, and our even longer running Consolidated Risk Tables feature. Remaining will be Earth's Busy Neighborhood along with its sky chart, ephemerides, and some supporting pages (e.g. Observatory Links). We do plan to make the Web site easier to use, more interesting as regards close-passing asteroids, and more glitch-free while needing much, much less manual attention here than the current site. -- Webmaster

*There may be some brief chaos when we take down the old site and put up the new. Please check back.
**You can still find the old files at the Internet Archive.

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1247 risk-listed objects, 163 have had news in the last 31 days. Updated at 2101 UTC on 22 Dec.
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 22 December '20

The MPC's NEO Confirmation Page has 44 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 44 objects listed. Of these, 26 were "one nighters." So far The Tracking News has counted a total of 64 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 22 December '20

Minor Planet Electronic Circulars

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

MPEC 2020-Y81 time-stamped "02:54 UT" - 2020 YF2 - see below
MPEC 2020-Y82 time-stamped "02:58 UT" - 2020 YG2 - see below
MPEC 2020-Y83 time-stamped "02:59 UT" - 2020 YH2 - see below
MPEC 2020-Y84 time-stamped "03:07 UT" - 2020 YJ2 - see below
MPEC 2020-Y85 time-stamped "08:23 UT" - 2020 YL2 - see below
MPEC 2020-Y86 time-stamped "08:24 UT" - 2020 YM2 - see below
MPEC 2020-Y87 time-stamped "08:26 UT" - 2020 YN2 - see below
MPEC 2020-Y88 time-stamped "08:27 UT" - 2020 YO2 - see below
MPEC 2020-Y89 time-stamped "08:29 UT" - 2020 YP2 - see below
MPEC 2020-Y90 time-stamped "08:30 UT" - 2020 YQ2 - see below
MPEC 2020-Y91 time-stamped "08:33 UT" - 2020 YR2 - see below
MPEC 2020-Y92 time-stamped "08:34 UT" - 2020 YS2 - see below
MPEC 2020-Y93 time-stamped "08:35 UT" - 2020 YT2 - see below
MPEC 2020-Y94 time-stamped "12:33 UT" - Daily Orbit Update - see below
MPEC 2020-Y95 time-stamped "14:04 UT" - 2020 YV2 - see below
MPEC 2020-Y96 time-stamped "14:05 UT" - 2020 YW2 - see below
MPEC 2020-Y97 time-stamped "14:07 UT" - 2020 YX2

MPEC 2020-Y97 - "14:07 UT" - 2020 YX2

K20Y02X 2020 YX2 (small asteroid, Earth MOID=0.9 LD, H=24.7 ~39m) was picked up at 1101 UT on 20 Dec. by the Mt. Lemmon Survey (MLS), observing it at Dec. 20.46-47p4. This detection was confirmed by Steward Obs. Mt. Lemmon Station (Dec. 20.53p3), program code 1 via Schwarzschild Obs. (Dec. 21.18-19p3 at V=22.2-23.0), Astronomical Research Obs. Westfield (Dec. 22.39p2), and the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (Dec. 22.43-44p3).

MPEC 2020-Y96 - "14:05 UT" - 2020 YW2

K20Y02W 2020 YW2 (i=39.1°, H=20.1 ~323m) was picked up at 1127 UT on 19 Dec. by MLS, observing it at Dec. 19.48-49p4 at G=21.27-22.15. This detection was confirmed by CSS-Kuiper (Dec. 19.54-55p3 at G=21.22-44, 20.42-43p4 at G=21.21-47, 21.42-43p3 at G=22.81-23.00 & 22.44-45p4 at G=20.53-96) and Schwarzschild Obs./code 1 (Dec. 20.21-22p2 at V=21.9-22.4).

MPEC 2020-Y95 - "14:04 UT" - 2020 YV2

K20Y02V 2020 YV2 (small asteroid, Earth MOID=7.2 LD, H=22.7 ~98m) was picked up at 1202 UT on 20 Dec. by MLS, observing it at Dec. 20.50-52p4 at G=20.87-21.23 and 21.53-54p2 at G=21.1-22.1. This detection was confirmed by CSS-Kuiper (Dec. 20.53-54p4, 21.51-52p3 & 22.46-47p3), Steward Mt. Lemmon Sta. (Dec. 20.54p3), Schwarzschild Obs./code 1 (Dec. 21.19p3), and ARO Westfield (Dec. 22.41-42p2).

<< DOU on 22 December '20 >> MPEC 2020-Y94 - "12:33 UT" - Daily Orbit Update

Observations of risk-listed objects
K20Y02G 2020 YG2 (small asteroid, Q=4.118 AU, arc=2 days, H=24.7 ~39m) from Steward Mt. Lemmon Sta. (Dec. 22.16p4)
K20Y01E 2020 YE1 (almost small, Q=4.166 AU, arc=4 days, H=22.0 ~135m) from Steward Mt. Lemmon Sta. (Dec. 22.47-49p4)
K20Y01B 2020 YB1 (small asteroid, arc=5 days, H=26.7 ~15m, close passer) from Steward Mt. Lemmon Sta. (Dec. 22.45-46p4)
K20Y01A 2020 YA1 (small asteroid, arc=5 days, H=26.7 ~15m, close passer, NHATS target) from the Spacewatch 0.9m telescope (Dec. 22.45-47p3)
K20Y00N 2020 YN (small asteroid, arc=5 days, H=27.6 ~10m, close passer) from the Spacewatch 1.8m telescope (Dec. 22.30-33p3)
K20X06V 2020 XV6 (small asteroid, q=0.185 AU, arc=7 days, H=22.7 ~98m) from Steward Mt. Lemmon Sta. (Dec. 22.17p4)
K20X06U 2020 XU6 (arc=8 days, H=21.3 ~186m) from Steward Mt. Lemmon Sta. (Dec. 22.28-29p4)
K20X06A 2020 XA6 (small asteroid, arc=8 days, H=24.1 ~51m) from Steward Mt. Lemmon Sta. (Dec. 22.18-19p4)
K20X00F 2020 XF (small asteroid, arc=18 days, H=26.8 ~15m, close passer, NHATS target) from CSS-Kuiper (Dec. 22.09-10p4)
K20M01O 2020 MO1 (small asteroid, arc=2 opp, H=23.4 ~71m) from Marco Micheli via Cerro Paranal (Dec. 19.30-32p3 at G=25.6-26.2)
99942 99942 Apophis (2004 MN4) (NHATS target) from Zijinshan-Beimian Survey (Dec. 19.95-99p3)
Observations of recently (no longer) risk-listed objects
K20X06E 2020 XE6 (arc=10 days, H=19.9 ~355m) from CSS-Kuiper (Dec. 22.27-28p4)
K20X05D 2020 XD5 (arc=11 days, H=20.1 ~323m) from Steward Mt. Lemmon Sta. (Dec. 22.49p4)
K20X02Z 2020 XZ2 (small asteroid, arc=15 days, H=22.4 ~112m) from CSS-Kuiper (Dec. 22.30-31p4 at G=21.48-22.01)
K20X01G 2020 XG1 (i=50.3°, arc=17 days, H=21.7 ~155m) from Steward Mt. Lemmon Sta. (Dec. 22.28-29p3)
Observations of close-passing objects
K20Y02J 2020 YJ2 (arc=1 day, H=27.3 ~12m) from ARO Westfield (Dec. 22.17p5) and Steward Mt. Lemmon Sta. (Dec. 22.22p4)
K20Y01J 2020 YJ1 (arc=3 days, H=24.0 ~54m) from ATLAS Mauna Loa (Dec. 21.38-40p4) and Steward Mt. Lemmon Sta. (Dec. 22.16p4)
K20X01H 2020 XH1 (arc=14 days, H=22.9 ~89m) from the Zwicky Transient Facility (ZTF) (Dec. 20.28p1 & 20.33-35p3)
K20X00H 2020 XH (arc=17 days, H=24.6 ~41m) from ZTF (Dec. 21.43-45p8)
J99R45M 1999 RM45 (arc=6 opp, H=19.4 ~446m) from Spacewatch 0.9m (Dec. 21.45-51p3)
G3899 163899 2003 SD220 (radar support) from ZTF (Dec. 22.09p3)
Observation campaigns (NHATS targets, radar support)
K20Y01H 2020 YH1 (arc=3 days, H=27.1 ~13m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 22.22p4)
K20Y01D 2020 YD1 (arc=4 days, H=24.3 ~47m, NHATS) from CSS-Kuiper (Dec. 22.36-37p3)
K20Y00C 2020 YC (arc=6 days, H=25.9 ~22m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 22.23p4)
K20X06M 2020 XM6 (arc=16 days, H=25.7 ~25m, NHATS) from CSS-Kuiper (Dec. 22.38p3)
K20X02O 2020 XO2 (arc=14 days, H=24.8 ~37m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 22.44p3 at G=20.99-22.61)
K20W00Y 2020 WY (arc=36 days, H=26.2 ~19m, NHATS) from CSS-Kuiper (Dec. 22.31-33p4)
K20U07F 2020 UF7 (arc=94 days, H=24.7 ~39m, NHATS) from MLS (Dec. 22.10-11p3)
K13Y02S 2013 YS2 (arc=2 opp, H=23.6 ~65m, NHATS) from Clixby Obs. (Dec. 20.99-00p5)
K11G60D 2011 GD60 (arc=3 opp, H=21.8 ~148m, NHATS) from ATLAS Mauna Loa (Dec. 21.36-39p4) and Spacewatch 0.9m (Dec. 22.24p2)
04179 4179 Toutatis (1989 AC) (radar) from ATLAS Mauna Loa (Dec. 21.20-23p4)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20Y02F 2020 YF2 (q=0.375 AU, arc=2 days, H=23.1 ~81m) from Farpoint Obs. (Dec. 22.10-12p3) and Steward Mt. Lemmon Sta. (Dec. 22.11-12p3)
K20Y01K 2020 YK1 (arc=3 days, H=25.4 ~28m) from CSS-Kuiper (Dec. 22.11-12p4)
K20Y00V 2020 YV (arc=5 days, H=25.0 ~34m) from Steward Mt. Lemmon Sta. (Dec. 22.24p4)
K20Y00M 2020 YM (arc=4 days, H=26.7 ~15m) from CSS-Kuiper (Dec. 21.52-53p4)
K20Y00D 2020 YD (arc=6 days, H=25.0 ~34m) from Steward Mt. Lemmon Sta. (Dec. 22.24-25p3)
K20X06Q 2020 XQ6 (q=0.325 AU, arc=8 days, H=22.8 ~93m) from Steward Mt. Lemmon Sta. (Dec. 22.44-45p4)
K20X06K 2020 XK6 (arc=8 days, H=25.2 ~31m) from CSS-Kuiper (Dec. 22.24-25p4)
K20X06D 2020 XD6 (arc=8 days, H=25.2 ~31m) from Steward Mt. Lemmon Sta. (Dec. 22.20-22p3)
K20X06C 2020 XC6 (arc=8 days, H=24.6 ~41m) from CSS-Kuiper (Dec. 22.20-21p3 at G=21.24-22.11)
K20X06B 2020 XB6 (i=55.3°, arc=8 days, H=22.6 ~102m) from Steward Mt. Lemmon Sta. (Dec. 22.25-27p3)
K20X05N 2020 XN5 (arc=10 days, H=22.3 ~117m) from CSS-Kuiper (Dec. 22.23-24p4)
K20X04H 2020 XH4 (arc=12 days, H=23.2 ~78m) from Steward Mt. Lemmon Sta. (Dec. 22.45p4)
K20X03V 2020 XV3 (arc=13 days, H=22.8 ~93m) from CSS-Kuiper (Dec. 22.10-11p4)
K20X03U 2020 XU3 (arc=14 days, H=22.3 ~117m) from CSS-Kuiper (Dec. 22.29-30p4 at G=20.97-22.63)
K20X03N 2020 XN3 (arc=17 days, H=22.9 ~89m) from CSS-Kuiper (Dec. 22.08-09p4 at G=20.83-22.09)
K20X03M 2020 XM3 (arc=16 days, H=22.7 ~98m) from Steward Mt. Lemmon Sta. (Dec. 22.40p4)
K20X03C 2020 XC3 (arc=13 days, H=22.5 ~107m) from Steward Mt. Lemmon Sta. (Dec. 22.23p4)
K20X02N 2020 XN2 (arc=14 days, H=23.4 ~71m) from Steward Mt. Lemmon Sta. (Dec. 22.44p4)
K20X00J 2020 XJ (arc=18 days, H=25.2 ~31m) from Spacewatch 0.9m (Dec. 22.27-31p3)
K20W03C 2020 WC3 (arc=31 days, H=22.4 ~112m) from MLS (Dec. 21.15-17p4) and Spacewatch 0.9m (Dec. 22.14-17p2)
K20W02U 2020 WU2 (Q=4.673 AU, arc=32 days, H=22.8 ~93m) from CSS-Kuiper (Dec. 22.18-19p4 at G=21.63-22.15)
K20V06M 2020 VM6 (arc=39 days, H=22.7 ~98m) from CSS-Kuiper (Dec. 22.12-14p3 at G=21.26-22.19)
K20V03Q 2020 VQ3 (arc=41 days, H=22.8 ~93m) from MLS (Dec. 21.15-17p4)
K20U05J 2020 UJ5 (arc=87 days, H=24.2 ~49m) from CSS-Kuiper (Dec. 22.28-29p4)
K20T07T 2020 TT7 (arc=69 days, H=22.3 ~117m) from Spacewatch 0.9m (Dec. 22.27-30p3)
K12XD3E 2012 XE133 (arc=2 opp, H=23.3 ~74m) from Squirrel Valley Obs. (Dec. 22.11-12p3)
K10VD9E 2010 VE139 (arc=51 days, H=22.1 ~129m) from Pan-STARRS 1 (PS1) (2010 Oct. 15.35-36p2)
K03Y01R 2003 YR1 (arc=2 opp, H=22.2 ~123m) from MLS (Dec. 21.13-15p4)
K20X00P 2020 XP (arc=35 days, H=21.8 ~148m) from Spacewatch 0.9m (Dec. 22.09-15p3)
K16T54R 2016 TR54 (arc=5 opp, H=22.0 ~135m) from MLS (Dec. 21.10-12p4)
K12L01D 2012 LD1 (arc=3 opp, H=21.9 ~141m) from MLS (Dec. 21.15-17p4)
Observations of other objects
K20Y00S 2020 YS (arc=15 days, H=21.5 ~170m) from Steward Mt. Lemmon Sta. (Dec. 22.29-31p3)
K20X07C 2020 XC7 (arc=7 days, H=20.5 ~269m) from Steward Mt. Lemmon Sta. (Dec. 22.22-23p4)
K20X04W 2020 XW4 (arc=13 days, H=21.2 ~195m) from Steward Mt. Lemmon Sta. (Dec. 21.42p2 & 21.50p1) and Spacewatch 0.9m (Dec. 22.42-44p2)
K20X04A 2020 XA4 (arc=13 days, H=21.1 ~204m) from Steward Mt. Lemmon Sta. (Dec. 22.41-42p3)
K20X03Y 2020 XY3 (arc=13 days, H=20.4 ~282m) from CSS-Kuiper (Dec. 22.14-16p4)
K20X03L 2020 XL3 (arc=13 days, H=21.2 ~195m) from Steward Mt. Lemmon Sta. (Dec. 22.25-27p3)
K20X01N 2020 XN1 (i=36.8°, Q=4.001 AU, arc=34 days, H=19.6 ~407m) from Steward Mt. Lemmon Sta. (Dec. 22.44p4)
K20X01F 2020 XF1 (i=51.9°, arc=17 days, H=21.7 ~155m) from CSS-Kuiper (Dec. 22.17-18p4 at G=21.27-22.29)
K20W05S 2020 WS5 (i=41.0°, Q=4.063 AU, arc=24 days, H=20.7 ~245m) from Northolt Branch Obs. (Dec. 20.85-86p3)
K20W05M 2020 WM5 (Q=4.825 AU, arc=24 days, H=20.5 ~269m) from ZTF (Dec. 19.41p6, 19.50p6 & 21.43-45p8) and Steward Mt. Lemmon Sta. (Dec. 22.32-35p4)
K20W04X 2020 WX4 (Q=5.568 AU, arc=29 days, H=21.7 ~155m) from CSS-Kuiper (Dec. 22.45-47p3)
K20W02H 2020 WH2 (Q=4.566 AU, arc=33 days, H=20.0 ~339m) from Spacewatch 1.8m (Dec. 21.54-55p3)
K20W01Z 2020 WZ1 (i=45.2°, arc=35 days, H=20.4 ~282m) from Steward Mt. Lemmon Sta. (Dec. 22.45p4)
K20W00G 2020 WG (Q=4.014 AU, arc=36 days, H=21.7 ~155m) from Steward Mt. Lemmon Sta. (Dec. 22.39-40p3)
K20V06Q 2020 VQ6 (arc=36 days, H=21.2 ~195m) from the Catalina Sky Survey (CSS) (Dec. 21.25-26p3)
K20V03M 2020 VM3 (arc=41 days, H=20.8 ~234m) from ZTF (Dec. 19.34p2, 19.39-41p4, 19.49-50p4 & 21.37-44p10)
K20T04G 2020 TG4 (Q=4.171 AU, arc=93 days, H=20.0 ~339m) from ZTF (Dec. 15.36p1, 20.28p2 & 20.35p2), Zijinshan-Beimian Survey (Dec. 19.81-83p2), and ATLAS Mauna Loa (Dec. 21.26-27p2, 21.32p1 & 21.37p1)
K20R00U 2020 RU (Q=4.833 AU, arc=113 days, H=19.2 ~490m) from ZTF (Dec. 19.30p2, 19.36p2, 20.24p1, 20.37p1, 20.44-47p2, 21.31-34p6 & 21.43-44p4)
K20Q05F 2020 QF5 (arc=129 days, H=21.6 ~162m) from MLS (Dec. 21.27-29p3 at G=20.96-22.40)
K20P01D 2020 PD1 (Q=4.135 AU, arc=183 days, H=19.2 ~490m) from Spacewatch 0.9m (Dec. 22.18-20p3)
K20O08C 2020 OC8 (arc=190 days, H=20.7 ~245m) from MLS (Dec. 21.18-20p3), ATLAS Mauna Loa (Dec. 21.31-34p4), and Spacewatch 0.9m (Dec. 22.20-22p3)
K20M05E 2020 ME5 (arc=2 opp, H=20.5 ~269m) from MLS (Dec. 21.13-15p4)
K20M03Z 2020 MZ3 (Q=4.359 AU, arc=205 days, H=20.0 ~339m) from Spacewatch 0.9m (Dec. 21.47-54p3)
K18G04X 2018 GX4 (arc=3 opp, H=19.2 ~490m) from Clixby Obs. (Dec. 20.93-94p6)
K17S19E 2017 SE19 (arc=3 opp, H=19.8 ~371m) from NEOWISE (Dec. 18.35p1, 18.48p1, 18.61p1, 18.74p1, 18.81p1, 18.87p1, 18.94p1, 19.01p1, 19.07p1, 19.20p1 & 19.33p1), MLS (Dec. 21.08-09p4), and ATLAS Mauna Loa (Dec. 21.25-29p4)
K17A05F 2017 AF5 (q=0.124 AU, Q=4.833 AU, arc=4 opp, H=17.7 ~977m) from Spacewatch 0.9m (Dec. 22.43-45p3)
K16V05R 2016 VR5 (arc=3 opp, H=19.1 ~513m) from MLS (Dec. 21.34-35p4)
K16UA1J 2016 UJ101 (arc=2 opp, H=20.5 ~269m) from Spacewatch 1.8m (Dec. 22.08-11p2)
K16O05P 2016 OP5 (arc=4 opp, H=20.9 ~224m) from CSS (Dec. 21.20-21p3)
K16EF6E 2016 EE156 (Q=4.660 AU, arc=4 opp, H=17.9 ~891m) from Spacewatch 0.9m (Dec. 22.25-26p3)
K16E85D 2016 ED85 (Q=5.062 AU, arc=3 opp, H=17.7 ~977m) from ATLAS Mauna Loa (Dec. 21.63-66p4)
K16C32B 2016 CB32 (Q=4.713 AU, arc=3 opp, H=18.7 ~616m) from ATLAS Mauna Loa (Dec. 21.53-56p4)
K16B01N 2016 BN1 (arc=3 opp, H=20.6 ~257m) from MLS (Dec. 21.34-35p4)
K15XQ1J 2015 XJ261 (arc=4 opp, H=19.6 ~407m) from MLS (Dec. 21.37-38p4)
K15B04F 2015 BF4 (arc=6 opp, H=20.4 ~282m) from ATLAS Mauna Loa (Dec. 21.27-30p4)
K15A45S 2015 AS45 (Q=5.237 AU, arc=4 opp, H=17.4 ~1.12 km) from ATLAS Mauna Loa (Dec. 21.56-58p4)
K14Wa5G 2014 WG365 (arc=3 opp, H=20.1 ~323m) from Foxfire Village Obs. (Dec. 22.02-08p3)
K14L26R 2014 LR26 (Q=5.114 AU, arc=2 opp, H=18.7 ~616m) from Spacewatch 1.8m (Dec. 21.48-52p3)
K14J57H 2014 JH57 (Q=6.247 AU, arc=5 opp, H=16.4 ~1.78 km) from ZTF (Dec. 21.57p6)
K13U14X 2013 UX14 (arc=4 opp, H=18.2 ~776m) from Pin Oak Obs. (Dec. 22.11-17p3)
K13P06Y 2013 PY6 (arc=4 opp, H=19.3 ~467m) from CSS (Dec. 21.23-24p4)
K11W39D 2011 WD39 (i=59.5°, arc=4 opp, H=19.3 ~467m) from MLS (Dec. 21.16-17p3)
K11W02L 2011 WL2 (arc=5 opp, H=20.8 ~234m) from Spacewatch 0.9m (Dec. 22.25-26p3)
K09H82D 2009 HD82 (arc=4 opp, H=21.6 ~162m) from Spacewatch 0.9m (Dec. 22.18-19p3)
K07T08G 2007 TG8 (Q=4.305 AU, arc=3 opp, H=18.5 ~676m) from CSS (Dec. 21.49-50p4)
K07F03K 2007 FK3 (arc=3 opp, H=19.2 ~490m) from MLS (Dec. 21.47-49p4)
K06WC9G 2006 WG129 (arc=3 opp, H=20.5 ~269m) from MLS (Dec. 21.51-53p4)
K04Q17D 2004 QD17 (arc=5 opp, H=19.8 ~371m) from MLS (Dec. 21.08-10p4)
K03Y01M 2003 YM1 (arc=3 opp, H=18.1 ~812m) from ZTF (Dec. 16.38p1, 16.44-47p2, 20.36p1 & 20.45p1) and CSS (Dec. 21.34-35p4)
K03Y00J 2003 YJ (arc=4 opp, H=20.4 ~282m) from ATLAS Mauna Loa (Dec. 21.28-33p4)
K03U05B 2003 UB5 (Q=4.176 AU, arc=3 opp, H=19.3 ~467m) from NEOWISE (Dec. 20.02p1, 20.15p1, 20.28p1, 20.41p1, 20.54p1, 20.67p1, 20.74p1, 20.80p1, 20.87p1, 20.93p1, 20.99p1, 21.06p1, 21.13p1 & 21.26p1)
K03B47K 2003 BK47 (Q=4.689 AU, arc=5 opp, H=17.8 ~933m) from ATLAS Mauna Loa (Dec. 21.52-55p8)
K02L03G 2002 LG3 (Q=4.124 AU, arc=3 opp, H=19.9 ~355m) from MLS (Dec. 21.37-38p4) and ATLAS Mauna Loa (Dec. 21.52-53p4)
K01Y03V 2001 YV3 (arc=3 opp, H=20.3 ~295m) from CSS (Dec. 21.31-33p4) and ATLAS Mauna Loa (Dec. 21.48-49p3)
J99V15X 1999 VX15 (Q=4.807 AU, arc=2 opp, H=18.6 ~645m) from ZTF (Dec. 19.31-34p4 & 21.33-36p4) and ATLAS Mauna Loa (Dec. 21.45-50p6)
r0871 530871 2011 WS2 from ZTF (Dec. 22.08-09p4)
q3804 523804 2000 YF29 from MLS (Dec. 21.10-12p4)
q3633 523633 2009 XR2 from ATLAS Mauna Loa (Dec. 21.56-57p3)
p3125 513125 1997 GC32 from ATLAS Mauna Loa (Dec. 21.32-37p4)
o8767 508767 1993 BD2 from CSS (Dec. 21.42-43p2)
o6779 506779 2006 YY2 from MLS (Dec. 21.25-26p4) and ATLAS Mauna Loa (Dec. 21.43-45p4)
o5093 505093 2011 VQ5 from ZTF (Dec. 19.33-38p12, 20.24p1, 20.35p1, 20.45p2, 21.34-37p4 & 21.44-45p4)
n7094 497094 2004 AH from CSS (Dec. 21.33-35p4) and ATLAS Mauna Loa (Dec. 21.47-51p4)
m3547 483547 2003 WM25 from ZTF (Dec. 21.40-46p8)
m3468 483468 2002 JY8 from MLS (Dec. 21.27-29p4)
k5749 465749 2009 WO6 from ZTF (Dec. 19.41p6, 19.50p6 & 21.43-45p4)
j2307 452307 Manawydan (1997 XV11) from ATLAS Mauna Loa (Dec. 21.34-38p4)
h8902 438902 2009 WF104 from ZTF (Dec. 16.41p1, 20.38p2 & 20.45p2)
h5404 435404 2008 AT28 from ZTF (Dec. 16.34-38p2, 20.29p2 & 20.36p1)
f7217 417217 2005 YS from Squirrel Valley Obs. (Dec. 22.07-09p3)
f6694 416694 2004 YR32 from CSS (Dec. 21.38-39p3)
f5029 415029 2011 UL21 from ATLAS Haleakala (Dec. 21.61-63p4)
f4903 414903 2010 XT45 from ATLAS Mauna Loa (Dec. 21.27-28p4)
f4586 414586 2009 UV18 from ATLAS Mauna Loa (Dec. 21.30-35p4)
e3039 403039 2008 AE from MLS (Dec. 21.47-49p4)
c0128 380128 1997 WB21 from CSS (Dec. 21.30-31p3)
b3579 373579 2002 AW11 from Zijinshan-Beimian Survey (Dec. 19.84-88p3)
a1532 361532 2007 HF44 from MLS (Dec. 21.54-55p4)
Z1370 351370 2005 EY from ZTF (Dec. 15.28p1)
Z1340 351340 2004 YC5 from CSS (Dec. 21.06-10p7)
Y5705 345705 2006 VB14 from CSS (Dec. 21.13-15p4)
U5090 305090 2007 VQ4 from CSS (Dec. 21.51-52p3)
U2156 302156 2001 SF286 from MLS (Dec. 21.20-22p4)
S3729 283729 2002 UX from ZTF (Dec. 19.35p2, 19.39p2 & 21.35-36p4)
O2216 242216 2003 RN10 from ZTF (Dec. 19.14p3, 19.20-22p6 & 19.27p6)
O1662 241662 2000 KO44 from ZTF (Dec. 20.29p2 & 20.34p2) and ATLAS Mauna Loa (Dec. 21.46-50p4)
O1596 241596 1998 XM2 from MLS (Dec. 21.27-29p4) and ATLAS Mauna Loa (Dec. 21.43-45p4)
L6707 216707 2004 XP164 from MLS (Dec. 21.41-43p4) and ATLAS Mauna Loa (Dec. 21.54-58p8)
K2435 202435 2005 XH8 from CSS (Dec. 21.27-28p4)
J0208 190208 2006 AQ from CSS (Dec. 21.44-46p2)
I6822 186822 2004 FE31 from ATLAS Mauna Loa (Dec. 21.28-32p4) and Foxfire Village Obs. (Dec. 22.03p1 & 22.09p1)
H7255 177255 2003 WC25 from ZTF (Dec. 21.07-08p2 & 22.09p2)
G3902 163902 2003 SW222 from Pin Oak Obs. (Dec. 22.10-16p3)
G3364 163364 2002 OD20 from CSS (Dec. 21.18-20p4)
G2781 162781 2000 XL44 from ZTF (Dec. 20.50-54p4) and ATLAS Mauna Loa (Dec. 21.58-60p4)
G2173 162173 Ryugu (1999 JU3) from Kelmis Obs. (Oct. 5.77-79p2, 13.82-85p3, 23.76-78p2, Nov. 3.74p1, 3.84p1, 4.74p1, 4.80p1, 12.76-78p2, 29.74p1, 29.78p1 & Dec. 9.76-77p2)
F9856 159856 2004 JW6 from MLS (Dec. 21.15-17p4)
F9402 159402 1999 AP10 from program code 1 via Kitab Obs. (Sept. 22.61p1, 22.73p1, 22.80-82p2 & 22.93p1) and Bredenkamp Obs. (Dec. 18.97p1, 19.11p1 & 19.23p1)
F2941 152941 2000 FM10 from NEOWISE (Dec. 19.36p1, 19.49p1, 19.63p1, 19.76p1, 19.82p1, 19.89p1, 19.95p1 & 20.08p1) and CSS (Dec. 21.47-48p4)
F2931 152931 2000 EA107 from ZTF (Dec. 20.56p2 & 21.57p6)
E3992 143992 2004 AF from MLS (Dec. 21.49-51p4)
E1079 141079 2001 XS30 from ZTF (Dec. 20.29p2, 20.34p2 & 21.33-39p8) and ATLAS Mauna Loa (Dec. 21.46-49p3)
D8859 138859 2000 WN63 from CSS (Dec. 21.46-48p3)
D7805 137805 1999 YK5 from CSS (Dec. 21.06-08p4)
D7062 137062 1998 WM from ZTF (Dec. 20.56-57p10)
D6635 136635 1994 VA1 from MLS (Dec. 21.45-47p3)
B1253 111253 2001 XU10 from MLS (Dec. 21.47-49p4)
90147 90147 2002 YK14 from ATLAS Haleakala (Dec. 21.63-66p4)
89355 89355 2001 VS78 from ZTF (Dec. 19.37-43p9 & 19.49-53p6) and CSS (Dec. 21.33-35p4)
88188 88188 2000 XH44 from ZTF (Dec. 19.30-38p12, 19.42p3, 20.25p1, 20.32p1, 20.37p1, 20.45p2, 21.29-37p8 & 21.44-45p4) and ATLAS Haleakala (Dec. 21.63-67p5)
86039 86039 1999 NC43 from ZTF (Dec. 22.07-08p4)
85275 85275 1994 LY from ZTF (Dec. 19.24-26p8 & 21.25-26p4) and ATLAS Mauna Loa (Dec. 21.34-38p4)
68359 68359 2001 OZ13 from MLS (Dec. 21.10-12p4) and ATLAS Mauna Loa (Dec. 21.29-33p4)
65717 65717 1993 BX3 from Pin Oak Obs. (Dec. 22.15-18p2)
55532 55532 2001 WG2 from ATLAS Mauna Loa (Dec. 21.27-31p4)
53430 53430 1999 TY16 from ZTF (Dec. 21.10-15p8)
35396 35396 1997 XF11 from MLS (Dec. 21.49-51p4)
31669 31669 1999 JT6 from ZTF (Dec. 21.56-57p10)
29075 29075 1950 DA from CSS (Dec. 21.47-48p4)
26760 26760 2001 KP41 from SATINO-1 (March 4.00-02p3)
25916 25916 2001 CP44 from Transit Dreams Obs. (Dec. 22.25-27p3)
23183 23183 2000 OY21 from CSS (Dec. 21.46-48p4)
22771 22771 1999 CU3 from MLS (Dec. 21.53-55p4)
22753 22753 1998 WT from CSS (Dec. 21.34-35p3)
21374 21374 1997 WS22 from ZTF (Dec. 20.37p2) and ATLAS Haleakala (Dec. 21.64-66p4)
21088 21088 Chelyabinsk (1992 BL2) from CSS (Dec. 21.36-37p4)
19764 19764 2000 NF5 from Kitab Obs./code 1 (Sept. 24.62-63p2, 24.82p1, 24.95p1 & 24.99p1)
16834 16834 1997 WU22 from CSS (Dec. 21.21p2)
10150 10150 1994 PN from ZTF (Dec. 20.37-45p5), CSS (Dec. 21.32-33p2), and ATLAS Mauna Loa (Dec. 21.49-54p4)
09058 9058 1992 JB from MLS (Dec. 21.08-10p4)
08567 8567 1996 HW1 from CSS (Dec. 21.36-37p4) and ATLAS Mauna Loa (Dec. 21.47-51p3)
08037 8037 1993 HO1 from CSS (Dec. 21.46-48p4) and ATLAS Mauna Loa (Dec. 21.62-66p7)
07753 7753 1988 XB from Bredenkamp Obs. (Dec. 18.92-97p3)
07350 7350 1993 VA from ZTF (Dec. 20.55-56p6 & 21.56-57p10)
06053 6053 1993 BW3 from CSS (Dec. 21.06-08p8)
05863 5863 Tara (1983 RB) from MLS (Dec. 21.22-24p4)
05836 5836 1993 MF from CSS (Dec. 21.27-28p4) and ATLAS Mauna Loa (Dec. 21.31-35p4)
05645 5645 1990 SP from CSS (Dec. 21.53-55p4)
05587 5587 1990 SB from ZTF (Dec. 16.21p1, 16.25p1, 16.32p1, 16.37p1, 17.12p2, 17.17-19p4, 17.27p2, 19.24p2 & 19.29p2), MLS (Dec. 21.16-17p4), and ATLAS Mauna Loa (Dec. 21.34-38p4)
05131 5131 1990 BG from CSS (Dec. 21.49-51p4)
04503 4503 Cleobulus (1989 WM) from NEOWISE (Dec. 18.29p1 & 18.42p1), ZTF (Dec. 19.15p2, 19.19p2 & 21.15-19p4), and ATLAS Mauna Loa (Dec. 21.25-29p4)
04055 4055 Magellan (1985 DO2) from ZTF (Dec. 15.21p1, 15.30p1, 17.17p3, 17.23p3, 19.25-26p6, 21.19p2 & 21.23-25p4) and ATLAS Mauna Loa (Dec. 21.38-40p4)
03360 3360 Syrinx (1981 VA) from ZTF (Dec. 19.30-32p4 & 21.29-33p4)
03199 3199 Nefertiti (1982 RA) from ATLAS Mauna Loa (Dec. 21.62-65p4)
03122 3122 Florence (1981 ET3) from ATLAS Mauna Loa (Dec. 21.62-65p4)
02368 2368 Beltrovata (1977 RA) from AHS Obs. (Dec. 21.40-42p3)
01943 1943 Anteros (1973 EC) from ATLAS Mauna Loa (Dec. 21.62-65p4)
01916 1916 Boreas (1953 RA) from MLS (Dec. 21.54-55p4)
01685 1685 Toro (1948 OA) from ATLAS Mauna Loa (Dec. 21.62-65p4)
01036 1036 Ganymed (1924 TD) from ZTF (Dec. 16.37p1, 20.36p2 & 20.42p2)

MPEC 2020-Y93 - "08:35 UT" - 2020 YT2

K20Y02T 2020 YT2 (H=20.99 ~215m) was picked up at 1000 UT on 20 Dec. by MLS, observing it at Dec. 20.42-43p4. This detection was confirmed by CSS-Kuiper (Dec. 20.52-53p4 at G=21.30-22.40, 21.31p4 at G=21.32-59 & 22.32p4 at G=20.91-21.87) and Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Dec. 22.22-23p3).

MPEC 2020-Y92 - "08:34 UT" - 2020 YS2

K20Y02S 2020 YS2 (risk listed, Earth MOID=0.2 LD, H=31.06 ~2m, close passer, NHATS target) was picked up at 1101 UT on 21 Dec. by ATLAS Mauna Loa, observing it at Dec. 21.46-50p4 and 21.64p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 22.18p4) and ARO Westfield (Dec. 22.26p3).

MPEC 2020-Y91 - "08:33 UT" - 2020 YR2

K20Y02R 2020 YR2 (risk listed, Earth MOID=0.0 LD, H=28.52 ~7m, close passer, NHATS target) was picked up at 0810 UT on 21 Dec. by MLS, observing it at Dec. 21.34-36p3. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 21.43-44p4 & 22.34p4), Holmes/CTIO (Dec. 22.23p3), and ARO Westfield (Dec. 22.29-30p3).

MPEC 2020-Y90 - "08:30 UT" - 2020 YQ2

K20Y02Q 2020 YQ2 (small asteroid, H=24.78 ~37m) was picked up at 0515 UT on 20 Dec. by MLS, observing it at Dec. 20.22-24p3. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 20.32-33p4 at G=20.56-22.02, 21.15-16p4 at G=20.07-21.25 & 22.14-15p4 at G=20.84-21.50) and Holmes/CTIO (Dec. 22.15p3).

MPEC 2020-Y89 - "08:29 UT" - 2020 YP2

K20Y02P 2020 YP2 (small asteroid, H=24.86 ~36m) was picked up at 0442 UT on 20 Dec. by MLS, observing it at Dec. 20.20-21p4. This detection was confirmed by CSS-Kuiper (Dec. 20.31-32p4 & 21.14-15p4), Holmes/CTIO (Dec. 22.11-13p3), and Steward Mt. Lemmon Sta. (Dec. 22.13-14p4).

MPEC 2020-Y88 - "08:27 UT" - 2020 YO2

K20Y02O 2020 YO2 (H=20.60 ~257m) was picked up at 0822 UT on 20 Dec. by MLS, observing it at Dec. 20.35-36p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 20.51-52p4, 21.31-33p4 & 22.30-31p3), Sandlot Obs. (Dec. 21.37-41p2), and Holmes/CTIO (Dec. 22.19-20p3).

MPEC 2020-Y87 - "08:26 UT" - 2020 YN2

K20Y02N 2020 YN2 (Earth MOID=0.7 LD, H=28.41 ~7m) was picked up at 0453 UT on 21 Dec. by MLS, observing it at Dec. 20.24-26p4 and 21.20-22p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 21.29-30p4 & 21.37-38p4), Tebbutt Obs. (Dec. 22.12-15p4), and ARO Westfield (Dec. 22.13p3).

MPEC 2020-Y86 - "08:24 UT" - 2020 YM2

K20Y02M 2020 YM2 (small asteroid, H=24.29 ~47m) was picked up at 0547 UT on 20 Dec. by MLS, observing it at Dec. 20.24-26p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 20.37-38p3, 21.16p4 & 22.16p4), E. Schwab via Calar Alto Schmidt (Dec. 20.88-90p3), Tebbutt Obs. (Dec. 21.19-21p3 & 22.15-17p3), ARO Westfield (Dec. 22.15p2), and Holmes/CTIO (Dec. 22.16-18p4).

MPEC 2020-Y85 - "08:23 UT" - 2020 YL2

K20Y02L 2020 YL2 (Earth MOID=1.4 LD, H=25.04 ~33m) was picked up at 1213 UT on 21 Dec. by ATLAS Mauna Loa, observing it at Dec. 21.51-58p3. This detection was confirmed by CSS (Dec. 19.39-40p3), program code 4 via Calar Alto Schmidt (Dec. 21.86-87p5), Transit Dreams Obs. (Dec. 22.19-21p3), Holmes/CTIO (Dec. 22.20p3), Steward Mt. Lemmon Sta. (Dec. 22.20-21p4), and ARO Westfield (Dec. 22.25-26p3).

MPEC 2020-Y84 - "03:07 UT" - 2020 YJ2

K20Y02J 2020 YJ2 (Earth MOID=0.7 LD, H=27.3 ~12m) was picked up at 1029 UT on 21 Dec. by Kiso Obs., observing it at Dec. 21.44p2, 21.52-57p16, 21.62-63p4, and 21.70-74p6. This detection was confirmed by Dax Obs. (Dec. 21.77-78p3), Calar Alto Schmidt/code 4 (Dec. 21.83p6), and Squirrel Valley Obs. (Dec. 22.04-06p3).

MPEC 2020-Y83 - "02:59 UT" - 2020 YH2

K20Y02H 2020 YH2 (H=21.7 ~155m) was picked up at 0303 UT on 20 Dec. by MLS, observing it at Dec. 20.13-14p4 at G=21.14-22.04 and 21.13p3 at G=22.00-22.14. This detection was confirmed by CSS-Kuiper (Dec. 20.24-25p3 at G=21.10-84 & 22.07-08p4 at G=21.09-22.03).

MPEC 2020-Y82 - "02:58 UT" - 2020 YG2

K20Y02G 2020 YG2 (risk listed, Q=4.120 AU, Earth MOID=1.5 LD, H=24.7 ~39m) was picked up at 0437 UT on 20 Dec. by MLS, observing it at Dec. 20.19-20p3. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 20.32p4 & 21.12p4), Calar Alto Schmidt/Schwab (Dec. 20.80-82p4), ARO Westfield (Dec. 21.05-07p3 & 22.06p2), and Tebbutt Obs. (Dec. 21.14-16p3 & 22.10-11p3).

MPEC 2020-Y81 - "02:54 UT" - 2020 YF2

K20Y02F 2020 YF2 (small asteroid, q=0.372 AU, Earth MOID=3.6 LD, H=23.2 ~78m) was picked up at 0406 UT on 20 Dec. by MLS, observing it at Dec. 20.17-19p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 20.31p4 & 21.11-12p3), Calar Alto Schmidt/Schwab (Dec. 20.75-78p4), ARO Westfield (Dec. 21.03-05p3), Tebbutt Obs. (Dec. 21.10-12p3 & 22.07-09p3), and Sandlot Obs. (Dec. 21.14-18p3).

Observers on 22 December '20

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

Code	Observer / observatory
`U71`	AHS Obs., 1 in MPEC 2020-Y94 -- 2368
`H21`	Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2020-Y81, 2020-Y82, 2020-Y85, 2020-Y86, 2020-Y87, 2020-Y91, 2020-Y92, 2020-Y94, 2020-Y95 & 2020-Y97 -- 2020 YX2, 2020 YV2, 2020 YS2, 2020 YR2, 2020 YN2, 2020 YM2, 2020 YL2, 2020 YJ2, 2020 YG2, 2020 YF2
`T05`	ATLAS Haleakala in Hawaii, 4 in MPEC 2020-Y94 -- 90147, 88188, 415029, 21374
`T08`	ATLAS Mauna Loa in Hawaii, 44 in MPECs 2020-Y85, 2020-Y92 & 2020-Y94 -- 2020 YS2, 2020 YL2, 2020 YJ1, 2020 TG4, 2020 OC8, 2017 SE19, 2016 ED85, 2016 CB32, 2015 BF4, 2015 AS45, 2011 GD60, 2003 YJ, 2003 BK47, 2002 LG3, 2001 YV3, 1999 VX15, 85275, 68359, 55532, 523633, 513125, 506779, 497094, 452307, 414903, 414586, 241662, 241596, 216707, 186822, 162781, 141079, 10150, 8567, 8037, 5836, 5587, 4503, 4179, 4055, 3199, 3122, 1943, 1685
`L65`	Bredenkamp Obs., 2 in MPEC 2020-Y94 -- 159402, 7753
`Z842`	E. Schwab via Calar Alto Schmidt in Spain, 3 in MPECs 2020-Y81, 2020-Y82 & 2020-Y86 -- 2020 YM2, 2020 YG2, 2020 YF2
`Z844`	program code 4 via Calar Alto Schmidt in Spain, 2 in MPECs 2020-Y84 & 2020-Y85 -- 2020 YL2, 2020 YJ2
`703`	Catalina Sky Survey (CSS) in Arizona, 33 in MPECs 2020-Y85 & 2020-Y94 -- 2020 YL2, 2020 VQ6, 2016 OP5, 2013 PY6, 2007 TG8, 2003 YM1, 2001 YV3, 89355, 508767, 497094, 416694, 380128, 351340, 345705, 305090, 29075, 23183, 22753, 21088, 202435, 190208, 16834, 163364, 152941, 138859, 137805, 10150, 8567, 8037, 6053, 5836, 5645, 5131
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 26 in MPECs 2020-Y83, 2020-Y89, 2020-Y93, 2020-Y94, 2020-Y95, 2020-Y96 & 2020-Y97 -- 2020 YX2, 2020 YW2, 2020 YV2, 2020 YT2, 2020 YP2, 2020 YM, 2020 YK1, 2020 YH2, 2020 YD1, 2020 XZ2, 2020 XY3, 2020 XV3, 2020 XU3, 2020 XN5, 2020 XN3, 2020 XM6, 2020 XK6, 2020 XF1, 2020 XF, 2020 XE6, 2020 XC6, 2020 WY, 2020 WX4, 2020 WU2, 2020 VM6, 2020 UJ5
`309&`	Marco Micheli via Cerro Paranal in Chile, 1 in MPEC 2020-Y94 -- 2020 MO1
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPECs 2020-Y85, 2020-Y86, 2020-Y88, 2020-Y89, 2020-Y90, 2020-Y91 & 2020-Y93 -- 2020 YT2, 2020 YR2, 2020 YQ2, 2020 YP2, 2020 YO2, 2020 YM2, 2020 YL2
`Z99`	Clixby Obs. in England, 2 in MPEC 2020-Y94 -- 2018 GX4, 2013 YS2
`958`	Dax Obs. in France, 1 in MPEC 2020-Y84 -- 2020 YJ2
`734`	Farpoint Obs. in Kansas, 1 in MPEC 2020-Y94 -- 2020 YF2
`W46`	Foxfire Village Obs., 2 in MPEC 2020-Y94 -- 2014 WG365, 186822
`K85`	Kelmis Obs., 1 in MPEC 2020-Y94 -- 162173
`381`	Kiso Obs. in Japan, 1 in MPEC 2020-Y84 -- 2020 YJ2
`1861`	program code 1 via Kitab Obs., 2 in MPEC 2020-Y94 -- 19764, 159402
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 50 in MPECs 2020-Y81, 2020-Y82, 2020-Y83, 2020-Y86, 2020-Y87, 2020-Y88, 2020-Y89, 2020-Y90, 2020-Y91, 2020-Y93, 2020-Y94, 2020-Y95, 2020-Y96 & 2020-Y97 -- 2020 YX2, 2020 YW2, 2020 YV2, 2020 YT2, 2020 YR2, 2020 YQ2, 2020 YP2, 2020 YO2, 2020 YN2, 2020 YM2, 2020 YH2, 2020 YG2, 2020 YF2, 2020 WC3, 2020 VQ3, 2020 UF7, 2020 QF5, 2020 OC8, 2020 ME5, 2017 SE19, 2016 VR5, 2016 TR54, 2016 BN1, 2015 XJ261, 2012 LD1, 2011 WD39, 2007 FK3, 2006 WG129, 2004 QD17, 2003 YR1, 2002 LG3, 68359, 523804, 506779, 483468, 403039, 361532, 35396, 302156, 241596, 22771, 216707, 159856, 143992, 136635, 111253, 9058, 5863, 5587, 1916
`C51`	NEOWISE in Earth polar orbit, 4 in MPEC 2020-Y94 -- 2017 SE19, 2003 UB5, 152941, 4503
`Z80`	Northolt Branch Obs. in England, 1 in MPEC 2020-Y94 -- 2020 WS5
`F51`	Pan-STARRS 1 in Hawaii, 1 in MPEC 2020-Y94 -- 2010 VE139
`V93`	Pin Oak Obs., 3 in MPEC 2020-Y94 -- 2013 UX14, 65717, 163902
`H36`	Sandlot Obs. in Kansas, 2 in MPECs 2020-Y81 & 2020-Y88 -- 2020 YO2, 2020 YF2
`C95`	SATINO-1 in France, 1 in MPEC 2020-Y94 -- 26760
`0331`	program code 1 via Schwarzschild Obs. in Germany, 3 in MPECs 2020-Y95, 2020-Y96 & 2020-Y97 -- 2020 YX2, 2020 YW2, 2020 YV2
`691`	Spacewatch 0.9m telescope in Arizona, 15 in MPEC 2020-Y94 -- 2020 YA1, 2020 XW4, 2020 XP, 2020 XJ, 2020 WC3, 2020 TT7, 2020 PD1, 2020 OC8, 2020 MZ3, 2017 AF5, 2016 EE156, 2011 WL2, 2011 GD60, 2009 HD82, 1999 RM45
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2020-Y94 -- 2020 YN, 2020 WH2, 2016 UJ101, 2014 LR26
`W34`	Squirrel Valley Obs. in North Carolina, 3 in MPECs 2020-Y84 & 2020-Y94 -- 2020 YJ2, 2012 XE133, 417217
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 42 in MPECs 2020-Y81, 2020-Y82, 2020-Y85, 2020-Y86, 2020-Y87, 2020-Y88, 2020-Y89, 2020-Y90, 2020-Y91, 2020-Y92, 2020-Y94, 2020-Y95 & 2020-Y97 -- 2020 YX2, 2020 YV2, 2020 YV, 2020 YS2, 2020 YS, 2020 YR2, 2020 YQ2, 2020 YP2, 2020 YO2, 2020 YN2, 2020 YM2, 2020 YL2, 2020 YJ2, 2020 YJ1, 2020 YH1, 2020 YG2, 2020 YF2, 2020 YE1, 2020 YD, 2020 YC, 2020 YB1, 2020 XW4, 2020 XV6, 2020 XU6, 2020 XQ6, 2020 XO2, 2020 XN2, 2020 XN1, 2020 XM3, 2020 XL3, 2020 XH4, 2020 XG1, 2020 XD6, 2020 XD5, 2020 XC7, 2020 XC3, 2020 XB6, 2020 XA6, 2020 XA4, 2020 WZ1, 2020 WM5, 2020 WG
`858`	Tebbutt Obs. in New Mexico, 4 in MPECs 2020-Y81, 2020-Y82, 2020-Y86 & 2020-Y87 -- 2020 YN2, 2020 YM2, 2020 YG2, 2020 YF2
`W33`	Transit Dreams Obs., 2 in MPECs 2020-Y85 & 2020-Y94 -- 2020 YL2, 25916
`N56`	Zijinshan-Beimian Survey, 3 in MPEC 2020-Y94 -- 2020 TG4, 99942, 373579
`I41`	Zwicky Transient Facility (ZTF) in southern California, 39 in MPEC 2020-Y94 -- 2020 XH1, 2020 XH, 2020 WM5, 2020 VM3, 2020 TG4, 2020 RU, 2014 JH57, 2003 YM1, 1999 VX15, 89355, 88188, 86039, 85275, 53430, 530871, 505093, 483547, 465749, 438902, 435404, 351370, 31669, 283729, 242216, 241662, 21374, 177255, 163899, 162781, 152931, 141079, 137062, 10150, 7350, 5587, 4503, 4055, 3360, 1036

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

Impact Risk Monitoring on 22 December '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 YS2	JPL Sentry	1700	2093-2093	1	2.619e-07	-9.86	-9.86	0	JPL: Computed at 02:05 today Pacific time based on 15 observations spanning .80417 days (2020-Dec-21.459571 to 2020-Dec-22.263742). Diameter approximately 0.002 km. from weighted mean H=30.98.
2020 YS2	NEODyS	1700	2092-2095	2	6.79e-09	-11.49	-11.52	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2020-12-21.460 to 2020-12-22.265."

2020 YR2	JPL Sentry	1700	2023-2040	4	3.225309e-06	-6.09	-6.09	0	JPL: Computed at 02:03 today Pacific time based on 17 observations spanning 1.0033 days (2020-Dec-21.340932 to 2020-Dec-22.34419). Diameter approximately 0.007 km. from weighted mean H=28.48.
2020 YR2	NEODyS	1700	2023-2057	24	2.31e-06	-6.25	-6.25	0	NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2020-12-21.342 to 2020-12-22.345."

2020 YG2	JPL Sentry	1700	2067-2109	4	2.12343e-07	-6.75	-6.87	0	JPL #2 for the day: Computed at 07:02 today Pacific time based on 30 observations spanning 1.9643 days (2020-Dec-20.19277 to 2020-Dec-22.157113). Diameter approximately 0.040 km. from weighted mean H=24.63.
2020 YG2	NEODyS	1700	2067-2117	4	2.39e-07	-6.72	-6.78	0	NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2020-12-20.194 to 2020-12-22.158."

2020 YA2	NEODyS	1700	2101-2120	30	2.27e-05	-6.67	-6.82	n/a	NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2020-12-20.241 to 2020-12-21.141."

2020 YM1	NEODyS	1700	2091-2120	62	4.73e-05	-7.00	-7.29	n/a	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2020-12-19.435 to 2020-12-21.204."

2020 YE1	NEODyS	1731	R E M O V E D						-

2020 YB1	NEODyS	2101	2073-2120	44	2.51e-05	-5.57	-6.07	n/a	NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2020-12-17.531 to 2020-12-22.465."
2020 YB1	JPL Sentry	1700	2073-2120	19	1.8763583e-05	-5.71	-6.18	0	JPL: Computed at 07:08 today Pacific time based on 37 observations spanning 4.9333 days (2020-Dec-17.530488 to 2020-Dec-22.463802). Diameter approximately 0.015 km. from weighted mean H=26.81.

2020 YA1	NEODyS	1731	2099-2116	15	5.97e-06	-6.54	-6.73	0	NEODyS #2 for the day: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2020-12-17.405 to 2020-12-22.469."
2020 YA1	JPL Sentry	1700	2088-2113	5	6.8144e-06	-6.47	-6.77	0	JPL: Computed at 07:11 today Pacific time based on 37 observations spanning 5.0643 days (2020-Dec-17.404234 to 2020-Dec-22.4685). Diameter approximately 0.015 km. from weighted mean H=26.74.

2020 YN	NEODyS	1731	2046-2054	4	3.39e-05	-5.33	-5.35	0	NEODyS: "Based on 32 optical observations (of which 2 are rejected as outliers) from 2020-12-17.253 to 2020-12-22.332."
2020 YN	JPL Sentry	1700	2046-2047	4	9.0920106e-05	-4.91	-4.92	0	JPL: Computed at 07:11 today Pacific time based on 30 observations spanning 5.0740 days (2020-Dec-17.25699 to 2020-Dec-22.33095). Diameter approximately 0.010 km. from weighted mean H=27.68.

2020 XV6	JPL Sentry	1700	2099-2105	4	6.2696e-07	-4.76	-5.10	0	JPL: Computed at 07:10 today Pacific time based on 94 observations spanning 7.0493 days (2020-Dec-15.120177 to 2020-Dec-22.169524). Diameter approximately 0.096 km. from weighted mean H=22.73.
2020 XV6	NEODyS	1700	2099-2105	5	9.23e-07	-4.61	-4.96	0	NEODyS: "Based on 94 optical observations (of which 1 are rejected as outliers) from 2020-12-15.121 to 2020-12-22.170."

2020 XU6	NEODyS	1731	R E M O V E D						-
2020 XU6	JPL Sentry	1700	2050-2117	10	3.05412e-08	-5.95	-6.37	0	JPL: Computed at 06:44 today Pacific time based on 36 observations spanning 7.9325 days (2020-Dec-14.362132 to 2020-Dec-22.29467). Diameter approximately 0.180 km. from weighted mean H=21.39.

2020 XA6	JPL Sentry	1700	2062-2073	4	1.731e-06	-5.04	-5.42	0	JPL: Computed at 07:10 today Pacific time based on 87 observations spanning 8.0615 days (2020-Dec-14.124162 to 2020-Dec-22.185699). Diameter approximately 0.052 km. from weighted mean H=24.07.
2020 XA6	NEODyS	1700	2062-2073	8	7.47e-07	-5.42	-5.73	0	NEODyS: "Based on 87 optical observations (of which 2 are rejected as outliers) from 2020-12-14.125 to 2020-12-22.186."

2020 XF	NEODyS	2101	2056-2120	536	1.36e-03	-3.87	-4.04	n/a	NEODyS: "Based on 90 optical observations (of which 1 are rejected as outliers) from 2020-12-04.328 to 2020-12-22.100."
2020 XF	JPL Sentry	1700	2056-2120	142	0.000372552925	-4.52	-5.02	0	JPL: Computed at 07:07 today Pacific time based on 90 observations spanning 17.772 days (2020-Dec-04.32683 to 2020-Dec-22.098803). Diameter approximately 0.015 km. from weighted mean H=26.70.

2020 MO1	NEODyS	1731	R E M O V E D						-
2020 MO1	JPL Sentry	1700	R E M O V E D						JPL: Risk listing removed at 1443 UTC today

2009 XQ2	JPL Sentry	0600	2084-2114	2	2.614e-10	-8.95	-9.18	0	JPL: Computed at 11:50 April 10th of 2017 Pacific time based on 16 observations spanning .10157 days (2009-Dec-13.19944 to 2009-Dec-13.30101). Diameter approximately 0.051 km. from weighted mean H=24.12.

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 22 December '20

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

2101	Noted that NEODyS has updated its 2020 XF risk assessment - see above Noted that NEODyS has updated its 2020 YB1 risk assessment - see above
1731	Noted that NEODyS has removed 2020 MO1 as an impact risk - see above Noted that NEODyS has removed 2020 XU6 as an impact risk - see above Noted that NEODyS has updated its 2020 YA1 risk assessment - see above Noted that NEODyS has removed 2020 YE1 as an impact risk - see above Noted that NEODyS has updated its 2020 YN risk assessment - see above
1700	Noted that JPL Sentry has removed 2020 MO1 as an impact risk - see above Noted that JPL Sentry has updated its 2020 XA6 risk assessment - see above Noted that NEODyS has updated its 2020 XA6 risk assessment - see above Noted that JPL Sentry has updated its 2020 XF risk assessment - see above Noted that JPL Sentry has updated its 2020 XU6 risk assessment - see above Noted that JPL Sentry has updated its 2020 XV6 risk assessment - see above Noted that NEODyS has updated its 2020 XV6 risk assessment - see above Noted that JPL Sentry has updated its 2020 YA1 risk assessment - see above Noted that NEODyS has updated its 2020 YA1 risk assessment - see above Noted that NEODyS has posted 2020 YA2 as an impact risk - see above Noted that JPL Sentry has updated its 2020 YB1 risk assessment - see above Noted that JPL Sentry has updated its 2020 YG2 risk assessment - see above Noted that NEODyS has posted 2020 YG2 as an impact risk - see above Noted that NEODyS has posted 2020 YM1 as an impact risk - see above Noted that JPL Sentry has updated its 2020 YN risk assessment - see above Noted that JPL Sentry has posted 2020 YR2 as an impact risk - see above Noted that NEODyS has posted 2020 YR2 as an impact risk - see above Noted that JPL Sentry has posted 2020 YS2 as an impact risk - see above Noted that NEODyS has posted 2020 YS2 as an impact risk - see above Grabbed MPEC 2020-Y85 - 2020 YL2 - see above Grabbed MPEC 2020-Y86 - 2020 YM2 - see above Grabbed MPEC 2020-Y87 - 2020 YN2 - see above Grabbed MPEC 2020-Y88 - 2020 YO2 - see above Grabbed MPEC 2020-Y89 - 2020 YP2 - see above Grabbed MPEC 2020-Y90 - 2020 YQ2 - see above Grabbed MPEC 2020-Y91 - 2020 YR2 - see above Grabbed MPEC 2020-Y92 - 2020 YS2 - see above Grabbed MPEC 2020-Y93 - 2020 YT2 - see above Grabbed MPEC 2020-Y94 - Daily Orbit Update - see above Grabbed MPEC 2020-Y95 - 2020 YV2 - see above Grabbed MPEC 2020-Y96 - 2020 YW2 - see above Grabbed MPEC 2020-Y97 - 2020 YX2 - see above
0600	Noted that JPL Sentry has updated its 2009 XQ2 risk assessment - see above Noted that JPL Sentry has posted 2020 YG2 as an impact risk - see above
0530	Grabbed MPEC 2020-Y81 - 2020 YF2 - see above Grabbed MPEC 2020-Y82 - 2020 YG2 - see above Grabbed MPEC 2020-Y83 - 2020 YH2 - see above Grabbed MPEC 2020-Y84 - 2020 YJ2 - see above

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