2020-12-07 Tracking News

Contents on 7 December '20

IAU Minor Planet Center
- NEOCP Activity -- 56 listings
- New MPECs -- 24 MPECs
Observers -- 38 observers
Impact Risk Monitoring -- fourteen objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1233 risk-listed objects, 176 have had news in the last 31 days. Updated at 2003 UTC on 7 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 7 December '20

The MPC's NEO Confirmation Page has 56 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 56 objects listed. Of these, 34 were "one nighters." So far The Tracking News has counted a total of 79 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 7 December '20

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 24 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2020-X34 time-stamped "03:55 UT" - 2020 XP - see below
MPEC 2020-X35 time-stamped "04:01 UT" - 2020 XQ - see below
MPEC 2020-X36 time-stamped "04:04 UT" - 2020 XR - see below
MPEC 2020-X37 time-stamped "04:04 UT" - 2020 XS - see below
MPEC 2020-X38 time-stamped "08:42 UT" - 2011 WC39 - see below
MPEC 2020-X39 time-stamped "08:45 UT" - 2020 XU - see below
MPEC 2020-X40 time-stamped "08:46 UT" - 2020 XV - see below
MPEC 2020-X41 time-stamped "08:46 UT" - 2020 XW - see below
MPEC 2020-X42 time-stamped "08:48 UT" - 2020 XX - see below
MPEC 2020-X43 time-stamped "08:49 UT" - 2020 XY - see below
MPEC 2020-X44 time-stamped "08:51 UT" - 2020 XZ - see below
MPEC 2020-X45 time-stamped "08:51 UT" - 2020 XA1 - see below
MPEC 2020-X46 time-stamped "08:52 UT" - 2020 XB1 - see below
MPEC 2020-X47 time-stamped "08:52 UT" - 2020 XC1 - see below
MPEC 2020-X48 time-stamped "08:53 UT" - 2020 XD1 - see below
MPEC 2020-X49 time-stamped "08:54 UT" - 2020 XE1 - see below
MPEC 2020-X50 time-stamped "10:25 UT" - 2020 XF1 - see below
MPEC 2020-X51 time-stamped "12:16 UT" - Daily Orbit Update - see below
MPEC 2020-X52 time-stamped "16:15 UT" - 2020 XG1 - see below
MPEC 2020-X53 time-stamped "16:19 UT" - 2020 XH1 - see below
MPEC 2020-X54 time-stamped "18:25 UT" - 2020 XJ1 - see below
MPEC 2020-X55 time-stamped "19:30 UT" - 2015 XX377 - see below
MPEC 2020-X56 time-stamped "21:35 UT" - Deletion of 2020 XA1 - see below
MPEC 2020-X57 time-stamped "23:53 UT" - 2020 XK1

MPEC 2020-X57 - "23:53 UT" - 2020 XK1

K20X01K 2020 XK1 (small asteroid, Earth MOID=0.0 LD, H=30.67 ~2m) was picked up at 0236 UT on 7 Dec. by the Mt. Lemmon Survey (MLS), observing it at Dec. 7.11-12p4. This detection was confirmed by Steward Obs. Mt. Lemmon Station (Dec. 7.15-22p16) and ATLAS Mauna Loa (Dec. 7.37p1).

MPEC 2020-X56 - "21:35 UT" - Deletion of 2020 XA1

MPEC 2020-X55 - "19:30 UT" - 2015 XX377

K15Xb7X 2015 XX377 (small asteroid, H=23.7 ~62m) from Pan-STARRS 1 (PS1) (Nov. 17.45-49p4 at G=21.40-83 & Dec. 7.30-33p3 at w=21.45-22.16)

MPEC 2020-X54 - "18:25 UT" - 2020 XJ1

K20X01J 2020 XJ1 (small asteroid, H=23.4 ~71m) was picked up at 1013 UT on 6 Dec. by the Bok Telescope, observing it at Dec. 6.43-44p4 and 7.45-47p4. This detection was confirmed by MLS (Nov. 11.43-44p4 & 22.44-46p4), the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (Dec. 6.50-51p3 & 7.26-27p4), and the Spacewatch 1.8m telescope (Dec. 6.51-53p3 & 7.44-46p3).

MPEC 2020-X53 - "16:19 UT" - 2020 XH1

K20X01H 2020 XH1 (Earth MOID=2.4 LD, H=22.83 ~92m) was picked up at 0758 UT on 6 Dec. by ATLAS Haleakala, observing it at Dec. 6.33-36p4, 7.35p2, and 7.40-45p4. This detection was confirmed by Cerro Tololo Inter-American Obs. (CTIO) (Dec. 7.14-15p6), the Zwicky Transient Facility (ZTF) (Dec. 7.18-19p8), the Catalina Sky Survey (CSS) (Dec. 7.18-20p4), Wiggins Obs. (Dec. 7.34-35p7), Glenlee Obs. (Dec. 7.43-46p11), Arcadia Obs. (Dec. 7.47-49p9), Moriyama Obs. (Dec. 7.54p2), and Swan Hill Obs. (Dec. 7.55p5).

MPEC 2020-X52 - "16:15 UT" - 2020 XG1

K20X01G 2020 XG1 (risk listed, i=51.0°, H=21.7 ~155m) was picked up at 1028 UT on 5 Dec. by MLS, observing it at Dec. 5.44-45p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 5.47p4, 6.22p4 & 7.15p4), the Spacewatch 0.9m telescope (Dec. 5.51-53p2), Squirrel Valley Obs. (Dec. 6.15-17p3), Astronomical Research Obs. Westfield (Dec. 6.16-17p2), and Mountainville Obs. (Dec. 6.25p1 at G=19.0, 6.32p1 at G=19.6 & 7.24-27p2 at G=19.5-25.0).

<< DOU on 7 December '20 >> MPEC 2020-X51 - "12:16 UT" - Daily Orbit Update

Observations of risk-listed objects
K20X00G 2020 XG (small asteroid, arc=3 days, H=28.1 ~8m, close passer, NHATS target) from CSS-Kuiper (Dec. 7.28-29p4 at G=21.30-22.10)
K20X00F 2020 XF (small asteroid, arc=3 days, H=26.7 ~15m, close passer, NHATS target) from Steward Mt. Lemmon Sta. (Dec. 7.07-08p4)
K20X00E 2020 XE (small asteroid, Q=4.477 AU, arc=3 days, H=26.1 ~20m, close passer) from Steward Mt. Lemmon Sta. (Dec. 7.25-26p4), CSS-Kuiper (Dec. 7.29-30p4), and Spacewatch 0.9m (Dec. 7.44-46p3)
K20X00C 2020 XC (small asteroid, arc=4 days, H=29.0 ~5m, close passer, NHATS target) from Steward Mt. Lemmon Sta. (Dec. 7.25p4) and CSS-Kuiper (Dec. 7.28p4)
K20W05U 2020 WU5 (i=42.2°, arc=6 days, H=18.7 ~616m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Dec. 5.28-32p5)
K20W05G 2020 WG5 (small asteroid, arc=9 days, H=27.7 ~10m, close passer, NHATS target) from Spacewatch 0.9m (Dec. 6.42-45p3)
K20W04T 2020 WT4 (small asteroid, arc=13 days, H=27.7 ~10m, NHATS target) from Spacewatch 1.8m (Dec. 7.28-30p2 at R=22.3)
Observations of recently (no longer) risk-listed objects
K20W05L 2020 WL5 (Q=4.081 AU, arc=9 days, H=21.3 ~186m) from Steward Mt. Lemmon Sta. (Dec. 7.19-20p3)
K20W01Q 2020 WQ1 (small asteroid, arc=23 days, H=22.9 ~89m) from Steward Mt. Lemmon Sta. (Dec. 7.45p4)
K20W00G 2020 WG (arc=21 days, H=21.7 ~155m) from PS1 (Dec. 6.39-48p7) and Steward Mt. Lemmon Sta. (Dec. 7.18p4)
K19X00S 2019 XS (small asteroid, arc=5 opp, H=23.7 ~62m, NHATS target) from PS1 (Dec. 7.23-27p3)
Observations of close-passing objects
K20X00H 2020 XH (arc=3 days, H=24.7 ~39m) from Mountainville Obs. (Dec. 6.27-30p2 & 6.35-39p2), Paus Obs. (Dec. 6.95-96p3), and Steward Mt. Lemmon Sta. (Dec. 7.29p4)
K20W04Z 2020 WZ4 (arc=20 days, H=24.4 ~45m) from Steward Mt. Lemmon Sta. (Dec. 7.39-42p4)
K20W02B 2020 WB2 (Q=4.696 AU, arc=18 days, H=23.5 ~68m) from Steward Mt. Lemmon Sta. (Dec. 7.27-29p3)
K20W00P 2020 WP (arc=20 days, H=24.2 ~49m) from Steward Mt. Lemmon Sta. (Dec. 6.52-53p4)
K20T12B 2020 TB12 (arc=53 days, H=21.6 ~162m) from Spacewatch 0.9m (Dec. 7.13-14p3) and Steward Mt. Lemmon Sta. (Dec. 7.24p3)
Observation campaigns (NHATS targets, radar support)
K20W03K 2020 WK3 (arc=15 days, H=25.1 ~32m, NHATS) from MLS (Dec. 6.45-46p4) and Steward Mt. Lemmon Sta. (Dec. 7.18p4)
K20W03F 2020 WF3 (arc=16 days, H=23.7 ~62m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 7.27p4)
K20W01D 2020 WD1 (arc=21 days, H=23.6 ~65m, NHATS) from Spacewatch 0.9m (Dec. 7.35p3) and Steward Mt. Lemmon Sta. (Dec. 7.38-39p4)
K20W00Y 2020 WY (arc=21 days, H=26.2 ~19m, NHATS) from Spacewatch 0.9m (Dec. 7.27-29p3)
K20V01Y 2020 VY1 (arc=27 days, H=25.9 ~22m, NHATS) from Spacewatch 0.9m (Dec. 7.16-18p3)
K20U02S 2020 US2 (arc=48 days, H=23.7 ~62m, NHATS) from ARO Westfield (Dec. 6.12-13p3 at V=22.0-22.3)
K20S00O 2020 SO (NHATS) from ATLAS Haleakala (Dec. 6.27-30p4), Steward Mt. Lemmon Sta. (Dec. 7.07-09p4), and CSS (Dec. 7.12-13p3)
K20P01X 2020 PX1 (arc=119 days, H=23.6 ~65m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 7.46p4)
K11G60D 2011 GD60 (arc=4 opp, H=21.8 ~148m, NHATS) from ATLAS Haleakala (Dec. 6.44-48p4)
K06R01J 2006 RJ1 (arc=4 opp, H=22.2 ~123m, NHATS) from MLS (Dec. 6.25-26p4) and ATLAS Mauna Loa (Dec. 6.32-35p4)
K03Y17S 2003 YS17 (arc=6 opp, H=21.7 ~155m, NHATS) from MLS (Dec. 6.34-36p4)
04179 4179 Toutatis (1989 AC) (radar) from ATLAS Haleakala (Dec. 6.22-25p5)
03200 3200 Phaethon (1983 TB) (radar) from Schiaparelli Obs. (Sept. 30.14-17p3)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20X00L 2020 XL (arc=3 days, H=23.8 ~59m) from CSS-Kuiper (Dec. 7.31p4)
K20X00K 2020 XK (arc=3 days, H=25.1 ~32m) from Steward Mt. Lemmon Sta. (Dec. 7.17p4)
K20X00J 2020 XJ (arc=3 days, H=25.2 ~31m) from Steward Mt. Lemmon Sta. (Dec. 7.17p4)
K20W04R 2020 WR4 (arc=13 days, H=26.0 ~21m) from Steward Mt. Lemmon Sta. (Dec. 7.37p4)
K20W04P 2020 WP4 (arc=14 days, H=22.1 ~129m) from Steward Mt. Lemmon Sta. (Dec. 7.21-24p4)
K20W03O 2020 WO3 (arc=27 days, H=23.1 ~81m) from Steward Mt. Lemmon Sta. (Dec. 7.20p4)
K20W03E 2020 WE3 (arc=16 days, H=25.3 ~29m) from Steward Mt. Lemmon Sta. (Dec. 7.26-27p4)
K20W03C 2020 WC3 (arc=16 days, H=22.4 ~112m) from Steward Mt. Lemmon Sta. (Dec. 7.24p4)
K20W01R 2020 WR1 (arc=18 days, H=24.5 ~43m) from ARO Westfield (Dec. 6.07-09p3 at V=22.2-3)
K20W00K 2020 WK (arc=26 days, H=25.6 ~26m) from CSS-Kuiper (Dec. 7.47-48p4 at G=20.85-22.02)
K20V03E 2020 VE3 (arc=44 days, H=23.3 ~74m) from ARO Westfield (Dec. 6.15-17p2 at V=22.3)
K20V01X 2020 VX1 (arc=27 days, H=22.9 ~89m) from Steward Mt. Lemmon Sta. (Dec. 7.36p4)
K20V00T 2020 VT (arc=33 days, H=25.2 ~31m) from Spacewatch 0.9m (Dec. 7.27-29p3)
K20U06T 2020 UT6 (arc=58 days, H=23.2 ~78m) from ARO Westfield (Dec. 6.19-20p3 at V=22.2-7)
K20T07T 2020 TT7 (arc=54 days, H=22.3 ~117m) from Pan-STARRS 2 (PS2) (Dec. 6.45-48p4) and Spacewatch 0.9m (Dec. 7.33-34p3)
K20T07Q 2020 TQ7 (arc=78 days, H=22.1 ~129m) from PS2 (Dec. 6.58-60p3)
K20T07N 2020 TN7 (arc=54 days, H=23.6 ~65m) from Steward Mt. Lemmon Sta. (Dec. 7.46p3)
K20T03G 2020 TG3 (Q=4.608 AU, arc=62 days, H=22.5 ~107m) from Steward Mt. Lemmon Sta. (Dec. 7.45p3)
K20R11Q 2020 RQ11 (arc=85 days, H=22.2 ~123m) from Spacewatch 0.9m (Dec. 7.15p3)
K20R03X 2020 RX3 (Q=4.399 AU, arc=88 days, H=22.2 ~123m) from ARO Westfield (Dec. 6.15-17p3 at V=22.1-6) and PS1 (Dec. 7.25-27p3)
K20W04X 2020 WX4 (Q=5.572 AU, arc=14 days, H=21.9 ~141m) from Steward Mt. Lemmon Sta. (Dec. 7.27-28p4) and CSS-Kuiper (Dec. 7.29-30p4)
K20W04W 2020 WW4 (arc=14 days, H=21.8 ~148m) from Steward Mt. Lemmon Sta. (Dec. 7.29-30p3)
K20W02E 2020 WE2 (arc=26 days, H=21.9 ~141m) from Steward Mt. Lemmon Sta. (Dec. 7.18-19p4)
K20W01G 2020 WG1 (arc=54 days, H=22.0 ~135m) from PS2 (Dec. 7.23-25p2)
K20T04M 2020 TM4 (Q=4.140 AU, arc=55 days, H=21.8 ~148m) from PS2 (Dec. 6.55-58p3)
K16Y00M 2016 YM (arc=3 opp, H=22.0 ~135m) from North Obs. (Dec. 6.81p3)
K10X68A 2010 XA68 (i=59.3°, arc=3 opp, H=21.9 ~141m) from Spacewatch 1.8m (Dec. 6.54-55p3)
K09W11D 2009 WD11 (arc=2 opp, H=22.0 ~135m) from ATLAS Mauna Loa (Dec. 6.37-39p4) and PS1 (Dec. 7.25-27p2)
Observations of other objects
K20X00Q 2020 XQ (arc=24 days, H=21.5 ~170m) from CSS (Nov. 13.36-37p4)
K20X00P 2020 XP (arc=20 days, H=21.7 ~155m) from Sandlot Obs. (Dec. 7.13-16p4)
K20W05S 2020 WS5 (i=40.9°, Q=4.036 AU, arc=10 days, H=21.0 ~214m) from CSS (Dec. 6.43-44p4) and Steward Mt. Lemmon Sta. (Dec. 7.43-44p4)
K20W05A 2020 WA5 (arc=12 days, H=21.5 ~170m) from Steward Mt. Lemmon Sta. (Dec. 7.29-30p4)
K20W03M 2020 WM3 (i=40.3°, arc=16 days, H=18.5 ~676m) from Steward Mt. Lemmon Sta. (Dec. 6.50p3)
K20W01Z 2020 WZ1 (i=45.2°, arc=20 days, H=20.4 ~282m) from Steward Mt. Lemmon Sta. (Dec. 7.30p3)
K20W01M 2020 WM1 (arc=20 days, H=21.3 ~186m) from CSS-Kuiper (Dec. 7.32p4)
K20W00W 2020 WW (arc=21 days, H=21.2 ~195m) from PS2 (Dec. 7.21-25p4 at w=21.21-22.05)
K20W00S 2020 WS (Q=4.126 AU, arc=71 days, H=19.9 ~355m) from PS2 (Dec. 7.21-25p4)
K20V05Z 2020 VZ5 (arc=22 days, H=21.1 ~204m) from Spacewatch 0.9m (Dec. 6.52-53p2)
K20V05C 2020 VC5 (i=42.6°, Q=4.252 AU, arc=23 days, H=20.5 ~269m) from MLS (Dec. 6.19-20p4 at G=21.17-22.41)
K20V03N 2020 VN3 (arc=26 days, H=20.2 ~309m) from Steward Mt. Lemmon Sta. (Dec. 6.50p4)
K20U05K 2020 UK5 (arc=80 days, H=20.9 ~224m) from ARO Westfield (Dec. 6.04-06p3 at V=22.0-22.2)
K20U04R 2020 UR4 (Q=4.171 AU, arc=54 days, H=20.2 ~309m) from ARO Westfield (Dec. 6.02-03p3 at V=22.1-4)
K20U01V 2020 UV1 (arc=52 days, H=20.1 ~323m) from Steward Mt. Lemmon Sta. (Dec. 7.42-43p4)
K20T05H 2020 TH5 (arc=55 days, H=21.1 ~204m) from Spacewatch 0.9m (Dec. 7.20-22p3)
K20T00X 2020 TX (arc=61 days, H=19.6 ~407m) from ARO Westfield (Dec. 5.99-00p2 at V=22.2)
K20S01C 2020 SC1 (arc=84 days, H=21.2 ~195m) from Steward Mt. Lemmon Sta. (Dec. 7.36-37p4)
K20R00U 2020 RU (Q=4.833 AU, arc=99 days, H=19.2 ~490m) from ZTF (Dec. 6.24p1, 6.30p1 & 6.36-39p3), PS1 (Dec. 6.52-53p2), PS2 (Dec. 6.56-58p3), and Steward Mt. Lemmon Sta. (Dec. 7.46-48p4)
K20Q07A 2020 QA7 (Q=4.150 AU, arc=100 days, H=20.2 ~309m) from ATLAS Mauna Loa (Dec. 6.42-45p7)
K20Q06Q 2020 QQ6 (Q=4.107 AU, arc=116 days, H=19.8 ~371m) from PS2 (Dec. 7.21-24p4)
K20Q04M 2020 QM4 (arc=109 days, H=18.6 ~645m) from PS1 (Dec. 6.39-41p3)
K20P05C 2020 PC5 (Q=4.177 AU, arc=114 days, H=18.5 ~676m) from ATLAS Haleakala (Dec. 6.29-31p4)
K20O08C 2020 OC8 (arc=174 days, H=20.8 ~234m) from CSS (Dec. 6.32-34p4) and ATLAS Haleakala (Dec. 6.38-40p4)
K20O04G 2020 OG4 (arc=4 opp, H=18.6 ~645m) from PS1 (Dec. 7.23-27p4)
K20O02A 2020 OA2 (arc=162 days, H=21.7 ~155m) from PS1 (Dec. 6.40-43p3 at i=21.56-22.10)
K20N01Q 2020 NQ1 (Q=4.092 AU, arc=148 days, H=20.4 ~282m) from ARO Westfield (Dec. 5.99-00p3 at V=22.0-22.2)
K20L07Z 2020 LZ7 from PS1 (June 15.58-60p4 first detection, 30.57-60p4, Aug. 10.34-37p4, 16.38-41p4 & Oct. 11.23-27p4), ATLAS Mauna Loa (Aug. 18.48-50p4), Purple Mtn. Obs. Xuyi Station (Aug. 23.63-66p3), and MLS (Oct. 10.16-18p3)
K20L02A 2020 LA2 (Q=7.490 AU, arc=175 days, H=19.8 ~371m) from Steward Mt. Lemmon Sta. (Dec. 7.38-43p4)
K20H06D 2020 HD6 (arc=2 opp, H=19.6 ~407m) from MLS (Dec. 6.11-12p4)
K20G03N 2020 GN3 (arc=260 days, H=19.1 ~513m) from Spacewatch 0.9m (Dec. 6.10-12p3) and Steward Mt. Lemmon Sta. (Dec. 6.13-14p4)
K18G04X 2018 GX4 (arc=4 opp, H=19.2 ~490m) from ATLAS Mauna Loa (Dec. 6.48-56p5)
K18C13V 2018 CV13 (arc=3 opp, H=21.0 ~214m) from Steward Mt. Lemmon Sta. (Dec. 7.31-32p4)
K17W16C 2017 WC16 (arc=2 opp, H=19.0 ~537m) from Steward Mt. Lemmon Sta. (Dec. 7.44-45p4)
K17S19E 2017 SE19 (arc=3 opp, H=19.8 ~371m) from CSS (Dec. 6.26-27p4)
K17E22R 2017 ER22 (arc=5 opp, H=19.5 ~426m) from Steward Mt. Lemmon Sta. (Dec. 6.51-52p3)
K17B05P 2017 BP5 (arc=3 opp, H=20.3 ~295m) from Steward Mt. Lemmon Sta. (Dec. 7.47p4)
K17A05F 2017 AF5 (q=0.124 AU, Q=4.833 AU, arc=4 opp, H=17.7 ~977m) from Steward Mt. Lemmon Sta. (Dec. 6.53-54p3)
K16J33U 2016 JU33 (arc=3 opp, H=20.8 ~234m) from PS1 (Dec. 7.25-27p3)
K16E85D 2016 ED85 (Q=5.062 AU, arc=3 opp, H=17.7 ~977m) from CSS (Dec. 6.52-53p2)
K16E84L 2016 EL84 (arc=4 opp, H=19.7 ~389m) from Steward Mt. Lemmon Sta. (Dec. 6.53-54p3)
K15B04F 2015 BF4 (arc=6 opp, H=20.5 ~269m) from CSS (Dec. 6.30-32p4)
K14L26Q 2014 LQ26 (Q=5.150 AU, arc=2 opp, H=18.3 ~741m) from MLS (Dec. 6.40-42p4)
K13V09Z 2013 VZ9 (arc=2 opp, H=19.8 ~371m) from MLS (Dec. 6.36-38p4)
K13U14X 2013 UX14 (arc=4 opp, H=18.3 ~741m) from ATLAS Mauna Loa (Dec. 6.43-45p4)
K13U00Y 2013 UY (arc=2 opp, H=20.8 ~234m) from MLS (Dec. 6.08-10p4 at G=21.22-22.12)
K13P06Y 2013 PY6 (arc=4 opp, H=19.3 ~467m) from MLS (Dec. 6.29-31p4), CSS (Dec. 6.32-33p4), and ATLAS Mauna Loa (Dec. 6.36-37p6)
K12S22A 2012 SA22 (arc=3 opp, H=18.1 ~812m) from ATLAS Mauna Loa (Dec. 6.44-46p4)
K11W02L 2011 WL2 (arc=6 opp, H=20.8 ~234m) from Spacewatch 0.9m (Dec. 7.32-33p3)
K10W03F 2010 WF3 (arc=4 opp, H=21.0 ~214m) from PS2 (Dec. 7.22-25p4)
K10VJ8U 2010 VU198 (arc=3 opp, H=18.6 ~645m) from PS2 (Dec. 6.45-47p3)
K10V12A 2010 VA12 (i=37.4°, q=0.199 AU, arc=3 opp, H=19.5 ~426m) from PS1 (Dec. 7.21-22p3)
K08CB8Z 2008 CZ118 (arc=4 opp, H=18.5 ~676m) from ZTF (Dec. 4.13-15p2, 4.27p1, 6.16p1 & 6.23p1)
K07VD7X 2007 VX137 (arc=5 opp, H=18.5 ~676m) from PS2 (Dec. 7.20-24p4)
K04U01R 2004 UR1 (arc=4 opp, H=20.5 ~269m) from PS2 (Dec. 7.21-25p4)
K04L03U 2004 LU3 (arc=5 opp, H=18.4 ~708m) from CSS (Dec. 6.32-34p4)
K03Y00J 2003 YJ (arc=4 opp, H=20.3 ~295m) from ATLAS Haleakala (Dec. 6.42-46p4)
K03B47K 2003 BK47 (Q=4.689 AU, arc=5 opp, H=17.8 ~933m) from ATLAS Haleakala (Dec. 6.59-61p4)
K02G08Z 2002 GZ8 (Q=4.633 AU, arc=4 opp, H=18.7 ~616m) from CSS (Dec. 6.49-51p4)
J99V15X 1999 VX15 (Q=4.807 AU, arc=2 opp, H=18.8 ~589m) from ATLAS Haleakala (Dec. 6.46-52p4)
J98W02A 1998 WA2 (Q=4.271 AU, arc=2 opp, H=19.9 ~355m) from MLS (Dec. 6.34-36p4)
r0938 530938 2011 XE from ATLAS Haleakala (Dec. 6.28-31p4)
q3804 523804 2000 YF29 from PS1 (Dec. 7.30-33p8)
p7103 517103 2013 EM20 from MLS (Dec. 6.51-53p4)
p3125 513125 1997 GC32 from CSS (Dec. 6.42-44p4) and MLS (Dec. 6.44-46p4)
o6779 506779 2006 YY2 from ATLAS Haleakala (Dec. 6.44-45p4)
o0080 500080 2011 WV134 from MLS (Dec. 6.29-31p4)
n6001 496001 2007 VR183 from MLS (Dec. 6.21-22p4), PS1 (Dec. 6.33-36p4), and PS2 (Dec. 7.21-25p4)
n5891 495891 2004 VS60 from MLS (Dec. 6.08-10p4)
m2718 482718 2013 ET9 from PS1 (Dec. 6.29-32p3 at w=22.0-22.3)
m0824 480824 1999 JO6 from MLS (Dec. 6.29-31p4) and CSS (Dec. 6.30-32p3)
l7465 477465 2009 XZ1 from PS1 (Dec. 6.35-37p2)
l4554 474554 2003 YQ94 from Castelmartini Obs. (Nov. 22.76-77p3), MLS (Dec. 6.11-12p4), and CSS (Dec. 6.15-16p4)
l0678 470678 2008 SS251 from PS1 (Dec. 6.34-37p3)
j9386 459386 2012 KJ11 from ZTF (Dec. 6.10-12p3 & 6.18p2)
j2307 452307 Manawydan (1997 XV11) from MLS (Dec. 6.33-36p4) and ATLAS Mauna Loa (Dec. 6.39-42p4)
j0263 450263 2003 WD158 from MLS (Dec. 6.38-40p4)
i8972 448972 2011 YV15 from PS2 (Dec. 7.21-25p4)
g8086 428086 2006 NM from ATLAS Mauna Loa (Dec. 6.35-38p4)
f8797 418797 2008 VF from Castelmartini Obs. (Nov. 22.84-85p3) and CSS (Dec. 6.21-23p4)
f7612 417612 2006 WQ29 from MLS (Dec. 6.27-29p4)
f6694 416694 2004 YR32 from ATLAS Mauna Loa (Dec. 6.55-62p4)
f5029 415029 2011 UL21 from CSS (Dec. 6.44-46p4) and ATLAS Mauna Loa (Dec. 6.51-56p4)
f5027 415027 2011 SG5 from MLS (Dec. 6.08-10p4)
f4903 414903 2010 XT45 from PS1 (Dec. 7.30-33p4)
f4586 414586 2009 UV18 from MLS (Dec. 6.27-28p4), CSS (Dec. 6.28-29p4), ATLAS Haleakala (Dec. 6.34-37p4), and PS2 (Dec. 7.26-29p4)
c2395 382395 1990 SM from ZTF (Dec. 4.55-57p4)
c1677 381677 2009 BJ81 from PS1 (Dec. 6.34-37p3 at w=21.9-22.1)
c0929 380929 2006 HU30 from PS2 (Dec. 6.35-43p8) and PS1 (Dec. 6.40-48p11)
b8124 378124 2006 VT2 from MLS (Dec. 6.25-27p4) and PS2 (Dec. 7.26-29p4)
b3579 373579 2002 AW11 from ZTF (Dec. 6.24-33p5) and MLS (Dec. 6.38-40p4)
Z5046 355046 2006 SO19 from MLS (Dec. 6.38-40p4)
Y5705 345705 2006 VB14 from ATLAS Mauna Loa (Dec. 6.24-29p4)
X3889 333889 1998 SV4 from PS1 (Dec. 7.20-22p4)
V6695 316695 1996 TE9 from ATLAS Mauna Loa (Dec. 6.24-28p3)
U5090 305090 2007 VQ4 from ATLAS Mauna Loa (Dec. 6.60-62p4)
S3729 283729 2002 UX from ATLAS Mauna Loa (Dec. 6.47-48p4)
R5714 275714 2000 YH4 from ATLAS Haleakala (Dec. 6.28-31p4)
R4138 274138 2008 FU6 from ATLAS Haleakala (Dec. 6.54-55p4)
Q7494 267494 2002 JB9 from PS1 (Dec. 6.59-62p4)
O1596 241596 1998 XM2 from ATLAS Mauna Loa (Dec. 6.52-55p4)
L6707 216707 2004 XP164 from ATLAS Haleakala (Dec. 6.58-60p4)
I6822 186822 2004 FE31 from ATLAS Haleakala (Dec. 6.31-35p4)
G3364 163364 2002 OD20 from ATLAS Mauna Loa (Dec. 6.34-37p4)
G3014 163014 2001 UA5 from CSS (Dec. 6.13-15p4)
G2173 162173 Ryugu (1999 JU3) from Castelmartini Obs. (Nov. 22.81p3), Southern Utsunomiya (Dec. 5.53-54p2), Spacewatch 0.9m (Dec. 6.10-12p2), ZTF (Dec. 6.11p2 & 6.20p2), and CSS (Dec. 6.15-16p4)
G2039 162039 1996 JG from CSS (Dec. 6.47-49p4) and ATLAS Mauna Loa (Dec. 6.48-52p4)
F9402 159402 1999 AP10 from PS2 (Dec. 6.59-62p4)
F5140 155140 2005 UD from PS1 (Dec. 6.39-48p8)
F4330 154330 2002 VX94 from ATLAS Mauna Loa (Dec. 6.35-38p4)
F4302 154302 2002 UQ3 from ATLAS Haleakala (Dec. 6.27-29p3)
F3201 153201 2000 WO107 from Castelmartini Obs. (Nov. 30.12-13p3), Kuban State Univ. Obs. (Dec. 1.77-85p8, 3.63-76p34, 4.64-69p38 & 4.75-79p55), Northolt Branch Obs. (Dec. 1.98p3 & 5.96p5), and AAAA Buenos Aires Obs. (Dec. 6.03-05p2)
F2978 152978 2000 GJ147 from ATLAS Mauna Loa (Dec. 6.34-36p4) and PS1 (Dec. 7.24-27p3)
F2756 152756 1999 JV3 from MLS (Dec. 6.49-50p4)
E4411 144411 2004 EW9 from PS1 (Dec. 7.23-27p6)
E3649 143649 2003 QQ47 from ZTF (Dec. 6.55-56p4)
D8947 138947 2001 BA40 from ATLAS Mauna Loa (Dec. 6.50-57p6)
D8095 138095 2000 DK79 from ATLAS Haleakala (Dec. 6.21-23p4)
D7925 137925 2000 BJ19 from MLS (Dec. 6.51-53p4)
D7052 137052 Tjelvar (1998 VO33) from ZTF (Dec. 6.55-57p9)
D7032 137032 1998 UO1 from Castelmartini Obs. (Nov. 22.78-79p3), MLS (Dec. 6.08-10p4), and CSS (Dec. 6.10-12p4)
99907 99907 1989 VA from Castelmartini Obs. (Nov. 22.80p3)
90075 90075 2002 VU94 from Castelmartini Obs. (Nov. 22.79-80p3) and CSS (Dec. 6.13-14p4)
88264 88264 2001 KN20 from MLS (Dec. 6.29-31p4) and PS2 (Dec. 7.27-30p4)
88188 88188 2000 XH44 from CSS (Dec. 6.47-48p4)
87684 87684 2000 SY2 from ATLAS Haleakala (Dec. 6.25-28p4)
86666 86666 2000 FL10 from ZTF (Dec. 5.08p1 & 7.07-09p3)
85275 85275 1994 LY from ATLAS Haleakala (Dec. 6.37-40p4)
68359 68359 2001 OZ13 from ATLAS Haleakala (Dec. 6.34-37p4) and PS1 (Dec. 7.29-32p4)
66272 66272 1999 JW6 from ATLAS Mauna Loa (Dec. 6.38-41p4)
65717 65717 1993 BX3 from ATLAS Haleakala (Dec. 6.37-39p4)
55532 55532 2001 WG2 from MLS (Dec. 6.36-38p4) and CSS (Dec. 6.36-38p3)
53435 53435 1999 VM40 from ZTF (Dec. 2.38-39p2 & 2.45p2) and CSS (Dec. 6.49-51p4)
36183 36183 1999 TX16 from ATLAS Haleakala (Dec. 6.21-23p4)
35107 35107 1991 VH from ATLAS Haleakala (Dec. 6.21-23p4)
31669 31669 1999 JT6 from ZTF (Dec. 6.55-57p4)
23183 23183 2000 OY21 from CSS (Dec. 6.51-53p4) and ATLAS Mauna Loa (Dec. 6.58-61p4)
21374 21374 1997 WS22 from ZTF (Dec. 4.43p2, 4.51p1 & 6.45p2) and CSS (Dec. 6.49-51p3)
19764 19764 2000 NF5 from MLS (Dec. 6.15-16p4)
17182 17182 1999 VU from MLS (Dec. 6.10-12p4)
16834 16834 1997 WU22 from ATLAS Mauna Loa (Dec. 6.35-38p4) and PS1 (Dec. 7.23-27p4)
12538 12538 1998 OH from ATLAS Haleakala (Dec. 6.49-50p4)
11405 11405 1999 CV3 from ATLAS Haleakala (Dec. 6.21-23p4)
10115 10115 1992 SK from ATLAS Mauna Loa (Dec. 6.30-34p4), PS2 (Dec. 6.35-38p4), and PS1 (Dec. 6.39-43p4)
09172 9172 Abhramu (1989 OB) from CSS (Dec. 6.13-14p2)
09058 9058 1992 JB from MLS (Dec. 6.23-24p4) and PS1 (Dec. 6.34-36p3)
08037 8037 1993 HO1 from ATLAS Mauna Loa (Dec. 6.56-59p4)
08014 8014 1990 MF from ATLAS Mauna Loa (Dec. 6.38-40p4)
07977 7977 1977 QQ5 from SATINO-1 (July 9.92-93p6) and ATLAS Haleakala (Dec. 6.19-22p4)
07753 7753 1988 XB from Berthelot Obs. (Dec. 2.92-02p11) and ATLAS Mauna Loa (Dec. 6.47-48p4)
07350 7350 1993 VA from ZTF (Dec. 6.55-57p4)
05836 5836 1993 MF from ATLAS Mauna Loa (Dec. 6.44-46p4)
05645 5645 1990 SP from ATLAS Mauna Loa (Dec. 6.62-65p4)
05587 5587 1990 SB from CSS (Dec. 6.34-36p4)
05131 5131 1990 BG from ATLAS Mauna Loa (Dec. 6.56-59p4)
04953 4953 1990 MU from ATLAS Haleakala (Dec. 6.25-28p4)
04688 4688 1980 WF from MLS (Dec. 6.15-16p4)
04503 4503 Cleobulus (1989 WM) from ATLAS Mauna Loa (Dec. 6.31-35p3)
04486 4486 Mithra (1987 SB) from PS2 (Dec. 7.21-25p3)
04055 4055 Magellan (1985 DO2) from ATLAS Haleakala (Dec. 6.37-40p4)
03908 3908 Nyx (1980 PA) from CSS (Dec. 6.13-14p3)
03671 3671 Dionysus (1984 KD) from MLS (Dec. 6.29-31p4) and PS2 (Dec. 7.27-30p3)
02368 2368 Beltrovata (1977 RA) from ATLAS Mauna Loa (Dec. 6.50-53p4)
02329 2329 Orthos (1976 WA) from ZTF (Dec. 6.55-57p5)
02212 2212 Hephaistos (1978 SB) from CSS (Dec. 6.28-30p4) and PS2 (Dec. 7.22-25p4)
01981 1981 Midas (1973 EA) from CSS (Dec. 6.08-10p4)
01866 1866 Sisyphus (1972 XA) from ATLAS Mauna Loa (Dec. 6.62-65p4)
01580 1580 Betulia (1950 KA) from ATLAS Mauna Loa (Dec. 6.40-43p4)
01036 1036 Ganymed (1924 TD) from ATLAS Haleakala (Dec. 6.49-50p4)
00887 887 Alinda (1918 DB) from ATLAS Haleakala (Dec. 6.26-28p4)

MPEC 2020-X50 - "10:25 UT" - 2020 XF1

K20X01F 2020 XF1 (borderline-small, i=52.2°, H=21.72 ~153m) was picked up at 0628 UT on 5 Dec. by MLS, observing it at Dec. 5.27-29p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 5.35p4, 6.06-07p4 & 7.09p3), ARO Westfield (Dec. 6.06p2), Spacewatch 0.9m (Dec. 6.16-18p3), Golden Ears Obs. (Dec. 6.18-20p3), Holmes/CTIO (Dec. 7.11-12p3), and Tebbutt Obs. (Dec. 7.12-13p3).

MPEC 2020-X49 - "08:54 UT" - 2020 XE1

K20X01E 2020 XE1 (Earth MOID=0.7 LD, H=26.77 ~15m) was picked up at 0924 UT on 5 Dec. by CSS, observing it at Dec. 5.39-41p3. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 5.45p4) and PS1 (Dec. 5.56-59p4 & 6.54-57p3).

MPEC 2020-X48 - "08:53 UT" - 2020 XD1

K20X01D 2020 XD1 (H=27.14 ~13m, NHATS) was picked up at 0838 UT on 6 Dec. by MLS, observing it at Dec. 6.36-38p4 at G=20.44-22.04. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 6.42-43p4 & 7.11-12p4) and Tebbutt Obs. (Dec. 7.22-24p3).

MPEC 2020-X47 - "08:52 UT" - 2020 XC1

K20X01C 2020 XC1 (Earth MOID=5.1 LD, H=26.91 ~14m, NHATS target) was picked up at 0626 UT on 6 Dec. by MLS, observing it at Dec. 6.27-28p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 6.30-31p3 & 6.36p4), Holmes/CTIO (Dec. 7.13-14p4), and Tebbutt Obs. (Dec. 7.17-19p3).

MPEC 2020-X46 - "08:52 UT" - 2020 XB1

K20X01B 2020 XB1 (Earth MOID=6.2 LD, H=26.08 ~21m) was picked up at 0630 UT on 6 Dec. by MLS, observing it at Dec. 6.27-29p3. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 6.31p4, 6.36p4 & 7.12p4), ROASTERR-1 (Dec. 6.82-83p3), Galilei Obs. (Dec. 7.01-03p3), and Tebbutt Obs. (Dec. 7.20-22p3).

MPEC 2020-X45 - "08:51 UT" - 2020 XA1

K20X01A 2020 XA1 (Earth MOID=3.5 LD, H=27.40 ~11m, NHATS) was picked up at 1044 UT on 6 Dec. by CSS, observing it at Dec. 6.45-46p4. This detection was confirmed by ATLAS Mauna Loa (Dec. 6.48-53p4), Steward Mt. Lemmon Sta. (Dec. 6.52-54p4 & 7.29-30p4), Moriyama Obs. (Dec. 6.61-62p3), ROASTERR-1 (Dec. 6.80-81p2), Clixby Obs. (Dec. 6.85p3), and Paus Obs. (Dec. 6.93-94p4).

MPEC 2020-X44 - "08:51 UT" - 2020 XZ

K20X00Z 2020 XZ (risk listed, Earth MOID=5.3 LD, H=26.16 ~20m) was picked up at 1054 UT on 5 Dec. by MLS, observing it at Dec. 5.45-47p3 and 6.29p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 7.23p3).

MPEC 2020-X43 - "08:49 UT" - 2020 XY

K20X00Y 2020 XY (small asteroid, H=25.60 ~26m) was picked up at 0906 UT on 5 Dec. by Bok Tel., observing it at Dec. 5.38-39p4. This detection was confirmed by Spacewatch 0.9m (Dec. 6.30-37p6 & 7.30-31p3) and Steward Mt. Lemmon Sta. (Dec. 7.13p4).

MPEC 2020-X42 - "08:48 UT" - 2020 XX

K20X00X 2020 XX (Earth MOID=3.9 LD, H=26.6 ~16m, NHATS target) was picked up at 0625 UT on 5 Dec. by MLS, observing it at Dec. 5.27-28p3. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 5.34p4, 6.10p4 & 7.09-10p3), ARO Westfield (Dec. 6.07-08p3), and Tebbutt Obs. (Dec. 7.14-15p3).

MPEC 2020-X41 - "08:46 UT" - 2020 XW

K20X00W 2020 XW (Earth MOID=4.5 LD, H=24.52 ~42m, NHATS) was picked up at 0305 UT on 5 Dec. by MLS, observing it at Dec. 5.13-14p3. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 5.23-24p4, 6.07p4 & 7.07p4), ARO Westfield (Dec. 5.99-00p3), and Sandlot Obs. (Dec. 6.05p1 & 6.10-11p2).

MPEC 2020-X40 - "08:46 UT" - 2020 XV

K20X00V 2020 XV (small asteroid, H=23.84 ~58m) was picked up at 1030 UT on 5 Dec. by MLS, observing it at Dec. 5.44-45p4. This detection was confirmed by CSS-Kuiper (Dec. 5.49p4), ARO Westfield (Dec. 6.15p2), Steward Mt. Lemmon Sta. (Dec. 6.22p4 & 7.17p4), and Sandlot Obs. (Dec. 6.29-30p3).

MPEC 2020-X39 - "08:45 UT" - 2020 XU

K20X00U 2020 XU (small asteroid, Earth MOID=6.8 LD, H=23.00 ~85m) was picked up at 1026 UT on 5 Dec. by MLS, observing it at Dec. 5.43-45p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 5.50p4, 6.19p4 & 7.17p3), ARO Westfield (Dec. 6.17-18p2), Mountainville Obs. (Dec. 6.19-26p3), Squirrel Valley Obs. (Dec. 6.19-21p3), ATLAS Mauna Loa (Dec. 6.45-49p4), and Paus Obs. (Dec. 6.90-92p4).

MPEC 2020-X38 - "08:42 UT" - 2011 WC39

K11W39C 2011 WC39 (small asteroid, H=22.96 ~87m) from PS1 (July 23.50p1 at G=22.52 & Dec. 5.26-31p4 at G=20.42-86), MLS (Dec. 7.15-17p4), and CSS-Kuiper (Dec. 7.25-26p4)

MPEC 2020-X37 - "04:04 UT" - 2020 XS

K20X00S 2020 XS (i=50.1°, H=21.2 ~195m) was picked up at 0535 UT on 4 Dec. by MLS, observing it at Dec. 4.23-25p4. This detection was confirmed by Spacewatch 1.8m (Dec. 4.30-32p3), Steward Mt. Lemmon Sta. (Dec. 4.36p2, 5.08p4, 6.09p4 & 7.10p4), ARO Westfield (Dec. 5.06-07p2), Sandlot Obs. (Dec. 5.14-16p3), and Spacewatch 0.9m (Dec. 5.33-34p2).

MPEC 2020-X36 - "04:04 UT" - 2020 XR

K20X00R 2020 XR (risk listed, Q=4.022 AU, Earth MOID=0.0 LD, H=19.6 ~407m) was picked up at 0505 UT on 4 Dec. by PS2, observing it at Dec. 4.21-25p4. This detection was confirmed by ARO Westfield (Dec. 5.02p2 & 6.01p2), Sandlot Obs. (Dec. 5.04-08p3, 6.02-03p2 & 7.02-06p3), Holmes/CTIO (Dec. 5.04-05p3 & 7.07p3), Steward Mt. Lemmon Sta. (Dec. 5.06p4, 6.07p4 & 7.06p4), Golden Ears Obs. (Dec. 5.08-09p2), and Spacewatch 0.9m (Dec. 6.09-11p3).

MPEC 2020-X35 - "04:01 UT" - 2020 XQ

K20X00Q 2020 XQ (Earth MOID=8.3 LD, H=21.7 ~155m) was picked up at 1034 UT on 4 Dec. by MLS, observing it at Dec. 4.44-46p4. This detection was confirmed by CSS (Nov. 16.34p2), Steward Mt. Lemmon Sta. (Dec. 4.48-49p3, 5.12p4, 6.13p4 & 7.14p4), Paus Obs. (Dec. 4.82-84p4), ARO Westfield (Dec. 5.11-12p3), and Golden Ears Obs. (Dec. 5.13-15p2).

MPEC 2020-X34 - "03:55 UT" - 2020 XP

K20X00P 2020 XP (borderline-small, H=21.8 ~148m) was picked up at 0617 UT on 5 Dec. by PS2, observing it at Dec. 5.26-29p4. This detection was confirmed by MLS (Nov. 17.10-11p2 & Dec. 6.19-20p4), Steward Mt. Lemmon Sta. (Dec. 6.06p4 & 7.06p4), Spacewatch 0.9m (Dec. 6.13-14p3), Sandlot Obs. (Dec. 6.14-18p3), Tebbutt Obs. (Dec. 7.06-08p3), and Holmes/CTIO (Dec. 7.08-09p3).

Observers on 7 December '20

A total of 38 observers appear in today's MPECs.

Code	Observer / observatory
`834`	AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2020-X51 -- 153201
`E23`	Arcadia Obs. in New South Wales, 1 in MPEC 2020-X53 -- 2020 XH1
`H21`	Astronomical Research Obs. Westfield in Illinois, 18 in MPECs 2020-X35, 2020-X36, 2020-X37, 2020-X39, 2020-X40, 2020-X41, 2020-X42, 2020-X50, 2020-X51 & 2020-X52 -- 2020 XX, 2020 XW, 2020 XV, 2020 XU, 2020 XS, 2020 XR, 2020 XQ, 2020 XG1, 2020 XF1, 2020 WR1, 2020 VE3, 2020 UT6, 2020 US2, 2020 UR4, 2020 UK5, 2020 TX, 2020 RX3, 2020 NQ1
`T05`	ATLAS Haleakala in Hawaii, 31 in MPECs 2020-X51 & 2020-X53 -- 2020 XH1, 2020 SO, 2020 PC5, 2020 OC8, 2011 GD60, 2003 YJ, 2003 BK47, 1999 VX15, 87684, 85275, 68359, 65717, 530938, 506779, 414586, 36183, 35107, 275714, 274138, 216707, 186822, 154302, 138095, 12538, 11405, 7977, 4953, 4179, 4055, 1036, 887
`T08`	ATLAS Mauna Loa in Hawaii, 39 in MPECs 2020-X39, 2020-X45, 2020-X51 & 2020-X57 -- 2020 XU, 2020 XK1, 2020 XA1, 2020 QA7, 2020 LZ7, 2018 GX4, 2013 UX14, 2013 PY6, 2012 SA22, 2009 WD11, 2006 RJ1, 66272, 452307, 428086, 416694, 415029, 345705, 316695, 305090, 283729, 241596, 23183, 16834, 163364, 162039, 154330, 152978, 138947, 10115, 8037, 8014, 7753, 5836, 5645, 5131, 4503, 2368, 1866, 1580
`L54`	Berthelot Obs., 1 in MPEC 2020-X51 -- 7753
`V00`	Bok Telescope in Arizona, 2 in MPECs 2020-X43 & 2020-X54 -- 2020 XY, 2020 XJ1
`160`	Castelmartini Obs. in Italy, 7 in MPEC 2020-X51 -- 99907, 90075, 474554, 418797, 162173, 153201, 137032
`703`	Catalina Sky Survey (CSS) in Arizona, 34 in MPECs 2020-X35, 2020-X45, 2020-X49, 2020-X51 & 2020-X53 -- 2020 XQ, 2020 XH1, 2020 XE1, 2020 XA1, 2020 WS5, 2020 SO, 2020 OC8, 2017 SE19, 2016 ED85, 2015 BF4, 2013 PY6, 2004 LU3, 2002 GZ8, 90075, 88188, 55532, 53435, 513125, 480824, 474554, 418797, 415029, 414586, 23183, 21374, 163014, 162173, 162039, 137032, 9172, 5587, 3908, 2212, 1981
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 10 in MPECs 2020-X38, 2020-X40, 2020-X51 & 2020-X54 -- 2020 XV, 2020 XL, 2020 XJ1, 2020 XG, 2020 XE, 2020 XC, 2020 WX4, 2020 WM1, 2020 WK, 2011 WC39
`807`	Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2020-X53 -- 2020 XH1
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPECs 2020-X34, 2020-X36, 2020-X47, 2020-X50 & 2020-X51 -- 2020 XR, 2020 XP, 2020 XF1, 2020 XC1, 2020 WU5
`Z99`	Clixby Obs. in England, 1 in MPEC 2020-X45 -- 2020 XA1
`X31`	Galilei Obs., 1 in MPEC 2020-X46 -- 2020 XB1
`Q70`	Glenlee Obs., 1 in MPEC 2020-X53 -- 2020 XH1
`U55`	Golden Ears Obs., 3 in MPECs 2020-X35, 2020-X36 & 2020-X50 -- 2020 XR, 2020 XQ, 2020 XF1
`C40`	Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-X51 -- 153201
`900`	Moriyama Obs. in Japan, 2 in MPECs 2020-X45 & 2020-X53 -- 2020 XH1, 2020 XA1
`V01`	Mountainville Obs. in Utah, 3 in MPECs 2020-X39, 2020-X51 & 2020-X52 -- 2020 XU, 2020 XH, 2020 XG1
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 52 in MPECs 2020-X34, 2020-X35, 2020-X37, 2020-X38, 2020-X39, 2020-X40, 2020-X41, 2020-X42, 2020-X44, 2020-X46, 2020-X47, 2020-X48, 2020-X50, 2020-X51, 2020-X52, 2020-X54 & 2020-X57 -- 2020 XZ, 2020 XX, 2020 XW, 2020 XV, 2020 XU, 2020 XS, 2020 XQ, 2020 XP, 2020 XK1, 2020 XJ1, 2020 XG1, 2020 XF1, 2020 XD1, 2020 XC1, 2020 XB1, 2020 WK3, 2020 VC5, 2020 LZ7, 2020 HD6, 2014 LQ26, 2013 VZ9, 2013 UY, 2013 PY6, 2011 WC39, 2006 RJ1, 2003 YS17, 1998 WA2, 88264, 55532, 517103, 513125, 500080, 496001, 495891, 480824, 474554, 452307, 450263, 417612, 415027, 414586, 378124, 373579, 355046, 19764, 17182, 152756, 137925, 137032, 9058, 4688, 3671
`J69`	North Obs. in England, 1 in MPEC 2020-X51 -- 2016 YM
`Z80`	Northolt Branch Obs. in England, 1 in MPEC 2020-X51 -- 153201
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 31 in MPECs 2020-X38, 2020-X49, 2020-X51 & 2020-X55 -- 2020 XE1, 2020 WG, 2020 RX3, 2020 RU, 2020 QM4, 2020 OG4, 2020 OA2, 2020 LZ7, 2019 XS, 2016 JU33, 2015 XX377, 2011 WC39, 2010 VA12, 2009 WD11, 68359, 523804, 496001, 482718, 477465, 470678, 414903, 381677, 380929, 333889, 267494, 16834, 155140, 152978, 144411, 10115, 9058
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 25 in MPECs 2020-X34, 2020-X36 & 2020-X51 -- 2020 XR, 2020 XP, 2020 WW, 2020 WS, 2020 WG1, 2020 TT7, 2020 TQ7, 2020 TM4, 2020 RU, 2020 QQ6, 2010 WF3, 2010 VU198, 2007 VX137, 2004 UR1, 88264, 496001, 448972, 414586, 380929, 378124, 159402, 10115, 4486, 3671, 2212
`B49`	Paus Obs. in Spain, 4 in MPECs 2020-X35, 2020-X39, 2020-X45 & 2020-X51 -- 2020 XU, 2020 XQ, 2020 XH, 2020 XA1
`D29`	Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2020-X51 -- 2020 LZ7
`L04`	ROASTERR-1 in Romania, 2 in MPECs 2020-X45 & 2020-X46 -- 2020 XB1, 2020 XA1
`H36`	Sandlot Obs. in Kansas, 5 in MPECs 2020-X34, 2020-X36, 2020-X37, 2020-X40, 2020-X41 & 2020-X51 -- 2020 XW, 2020 XV, 2020 XS, 2020 XR, 2020 XP
`C95`	SATINO-1 in France, 1 in MPEC 2020-X51 -- 7977
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2020-X51 -- 3200
`Q21`	Southern Utsunomiya in Japan, 1 in MPEC 2020-X51 -- 162173
`691`	Spacewatch 0.9m telescope in Arizona, 20 in MPECs 2020-X34, 2020-X36, 2020-X37, 2020-X43, 2020-X50, 2020-X51 & 2020-X52 -- 2020 XY, 2020 XS, 2020 XR, 2020 XP, 2020 XG1, 2020 XF1, 2020 XE, 2020 WY, 2020 WG5, 2020 WD1, 2020 VZ5, 2020 VY1, 2020 VT, 2020 TT7, 2020 TH5, 2020 TB12, 2020 RQ11, 2020 GN3, 2011 WL2, 162173
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2020-X37, 2020-X51 & 2020-X54 -- 2020 XS, 2020 XJ1, 2020 WT4, 2010 XA68
`W34`	Squirrel Valley Obs. in North Carolina, 2 in MPECs 2020-X39 & 2020-X52 -- 2020 XU, 2020 XG1
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 63 in MPECs 2020-X34, 2020-X35, 2020-X36, 2020-X37, 2020-X39, 2020-X40, 2020-X41, 2020-X42, 2020-X43, 2020-X44, 2020-X45, 2020-X46, 2020-X47, 2020-X48, 2020-X49, 2020-X50, 2020-X51, 2020-X52 & 2020-X57 -- 2020 XZ, 2020 XY, 2020 XX, 2020 XW, 2020 XV, 2020 XU, 2020 XS, 2020 XR, 2020 XQ, 2020 XP, 2020 XK1, 2020 XK, 2020 XJ, 2020 XH, 2020 XG1, 2020 XF1, 2020 XF, 2020 XE1, 2020 XE, 2020 XD1, 2020 XC1, 2020 XC, 2020 XB1, 2020 XA1, 2020 WZ4, 2020 WZ1, 2020 WX4, 2020 WW4, 2020 WS5, 2020 WR4, 2020 WQ1, 2020 WP4, 2020 WP, 2020 WO3, 2020 WM3, 2020 WL5, 2020 WK3, 2020 WG, 2020 WF3, 2020 WE3, 2020 WE2, 2020 WD1, 2020 WC3, 2020 WB2, 2020 WA5, 2020 VX1, 2020 VN3, 2020 UV1, 2020 TN7, 2020 TG3, 2020 TB12, 2020 SO, 2020 SC1, 2020 RU, 2020 PX1, 2020 LA2, 2020 GN3, 2018 CV13, 2017 WC16, 2017 ER22, 2017 BP5, 2017 AF5, 2016 EL84
`Q38`	Swan Hill Obs., 1 in MPEC 2020-X53 -- 2020 XH1
`858`	Tebbutt Obs. in New Mexico, 6 in MPECs 2020-X34, 2020-X42, 2020-X46, 2020-X47, 2020-X48 & 2020-X50 -- 2020 XX, 2020 XP, 2020 XF1, 2020 XD1, 2020 XC1, 2020 XB1
`718`	Wiggins Obs. in Utah, 1 in MPEC 2020-X53 -- 2020 XH1
`I41`	Zwicky Transient Facility (ZTF) in southern California, 15 in MPECs 2020-X51 & 2020-X53 -- 2020 XH1, 2020 RU, 2008 CZ118, 86666, 53435, 459386, 382395, 373579, 31669, 21374, 162173, 143649, 137052, 7350, 2329

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

Impact Risk Monitoring on 7 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 XG1	JPL Sentry	1800	2034-2034	1	3.100e-10	-7.11	-7.11	0	JPL: Computed at 09:32 today Pacific time based on 27 observations spanning 1.8349 days (2020-Dec-05.436795 to 2020-Dec-07.27171). Diameter approximately 0.140 km. from weighted mean H=21.91.

2020 XZ	NEODyS	1731	2088	1	4.07e-08	-8.12	-8.12	0	NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2020-12-05.455 to 2020-12-07.235."
2020 XZ	JPL Sentry	1730	2058-2058	1	7.624e-07	-6.58	-6.58	0	JPL: Computed at 01:59 today Pacific time based on 10 observations spanning 1.7795 days (2020-Dec-05.454555 to 2020-Dec-07.234055). Diameter approximately 0.022 km. from weighted mean H=25.98.

2020 XR	NEODyS	1730	2028-2103	3	3.85e-06	-2.05	-2.05	0	NEODyS: "Based on 39 optical observations (of which 1 are rejected as outliers) from 2020-12-04.213 to 2020-12-07.075."
2020 XR	JPL Sentry	0615	2028-2103	8	3.9951974e-06	-2.05	-2.06	0	JPL: Computed at 21:28 Dec. 6th Pacific time based on 38 observations spanning 2.8615 days (2020-Dec-04.212236 to 2020-Dec-07.07374). Diameter approximately 0.400 km. from weighted mean H=19.64.

2020 XG	NEODyS	2002	2081-2120	144	7.43e-05	-5.90	-6.57	n/a	NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2020-12-04.338 to 2020-12-07.292."
2020 XG	JPL Sentry	1730	2081-2120	64	8.48485349e-05	-5.83	-6.42	0	JPL: Computed at 06:22 today Pacific time based on 25 observations spanning 2.9539 days (2020-Dec-04.336897 to 2020-Dec-07.290787). Diameter approximately 0.008 km. from weighted mean H=28.09.

2020 XF	NEODyS	2002	2056-2120	659	1.16e-03	-3.92	-4.06	n/a	NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2020-12-04.328 to 2020-12-07.078."
2020 XF	JPL Sentry	1730	2056-2120	145	0.00036657584	-4.51	-5.09	0	JPL: Computed at 06:45 today Pacific time based on 44 observations spanning 2.7500 days (2020-Dec-04.32683 to 2020-Dec-07.076859). Diameter approximately 0.016 km. from weighted mean H=26.64.

2020 XE	NEODyS	2001	2040-2063	6	2.22e-05	-4.48	-4.48	0	NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2020-12-04.398 to 2020-12-07.459."
2020 XE	JPL Sentry	1730	2040-2059	4	1.42133349e-05	-4.66	-4.66	0	JPL: Computed at 06:01 today Pacific time based on 41 observations spanning 3.0609 days (2020-Dec-04.397182 to 2020-Dec-07.4581). Diameter approximately 0.020 km. from weighted mean H=26.15.

2020 XC	NEODyS	2001	2085-2117	3	7.55e-07	-8.41	-8.42	0	NEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2020-12-03.363 to 2020-12-07.282."
2020 XC	JPL Sentry	1730	2085-2085	1	6.753e-07	-8.44	-8.44	0	JPL: Computed at 06:26 today Pacific time based on 43 observations spanning 3.9185 days (2020-Dec-03.36221 to 2020-Dec-07.280713). Diameter approximately 0.005 km. from weighted mean H=29.01.

2020 WU5	NEODyS	2002	2059	1	1.52e-10	-6.48	-6.48	0	NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2020-11-29.762 to 2020-12-05.325."
2020 WU5	JPL Sentry	1730	2040-2115	9	6.3501e-09	-4.90	-5.18	0	JPL: Computed at 06:05 today Pacific time based on 29 observations spanning 5.5627 days (2020-Nov-29.76136 to 2020-Dec-05.3241). Diameter approximately 0.590 km. from weighted mean H=18.78.

2020 WG5	NEODyS	2002	2086-2120	34	1.8e-04	-5.37	-5.45	n/a	NEODyS: "Based on 49 optical observations (of which 2 are rejected as outliers) from 2020-11-27.253 to 2020-12-06.450."
2020 WG5	JPL Sentry	1730	2086-2120	14	0.000168629755	-5.40	-5.49	0	JPL: Computed at 06:09 today Pacific time based on 47 observations spanning 9.1815 days (2020-Nov-27.251726 to 2020-Dec-06.43324). Diameter approximately 0.010 km. from weighted mean H=27.69.

2020 WT4	JPL Sentry	1730	2062-2119	6	6.94914e-06	-6.82	-7.04	0	JPL: Computed at 06:16 today Pacific time based on 28 observations spanning 10.929 days (2020-Nov-24.190527 to 2020-Dec-05.11929). Diameter approximately 0.010 km. from weighted mean H=27.74.

2020 HW7	JPL Sentry	0615	2044-2090	5	1.32388e-06	-6.82	-6.89	0	JPL: Computed at 07:03 Aug. 21st Pacific time based on 23 observations spanning 3.8439 days (2020-Apr-26.364714 to 2020-Apr-30.2086). Diameter approximately 0.012 km. from weighted mean H=27.20.

2015 VO142	JPL Sentry	0615	2065-2118	10	6.865301e-06	-7.42	-7.68	0	JPL: Computed at 08:30 April 20th of 2019 Pacific time based on 113 observations spanning 15.570 days (2015-Nov-06.497654 to 2015-Nov-22.06765). Diameter approximately 0.005 km. from weighted mean H=28.98.

2010 XQ	JPL Sentry	0615	2021-2116	69	2.06259e-07	-6.60	-7.29	0	JPL: Computed at 20:02 April 8th of 2017 Pacific time based on 15 observations spanning .12618 days (2010-Dec-02.30871 to 2010-Dec-02.43489). Diameter approximately 0.031 km. from weighted mean H=25.17.

2007 YM	JPL Sentry	0615	2021-2115	246	4.2864482e-06	-5.69	-6.30	0	JPL: Computed at 20:16 April 8th of 2017 Pacific time based on 12 observations spanning .12805 days (2007-Dec-17.39661 to 2007-Dec-17.52466). Diameter approximately 0.018 km. from weighted mean H=26.33.

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 7 December '20

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

2358	Grabbed MPEC 2020-X57 - 2020 XK1 - see above
2150	Grabbed MPEC 2020-X56 - Deletion of 2020 XA1 - see above
2002	Noted that NEODyS has updated its 2020 WG5 risk assessment - see above Noted that NEODyS has updated its 2020 WU5 risk assessment - see above Noted that NEODyS has updated its 2020 XF risk assessment - see above Noted that NEODyS has updated its 2020 XG risk assessment - see above
2001	Noted that NEODyS has updated its 2020 XC risk assessment - see above Noted that NEODyS has updated its 2020 XE risk assessment - see above Grabbed MPEC 2020-X54 - 2020 XJ1 - see above Grabbed MPEC 2020-X55 - 2015 XX377 - see above
1800	Noted that JPL Sentry has posted 2020 XG1 as an impact risk - see above
1730	Noted that JPL Sentry has updated its 2020 WG5 risk assessment - see above Noted that JPL Sentry has updated its 2020 WT4 risk assessment - see above Noted that JPL Sentry has updated its 2020 WU5 risk assessment - see above Noted that JPL Sentry has updated its 2020 XC risk assessment - see above Noted that JPL Sentry has updated its 2020 XE 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 XG risk assessment - see above Noted that NEODyS has posted 2020 XR as an impact risk - see above Noted that JPL Sentry has posted 2020 XZ as an impact risk - see above Noted that NEODyS has posted 2020 XZ as an impact risk - see above Grabbed MPEC 2020-X38 - 2011 WC39 - see above Grabbed MPEC 2020-X39 - 2020 XU - see above Grabbed MPEC 2020-X40 - 2020 XV - see above Grabbed MPEC 2020-X41 - 2020 XW - see above Grabbed MPEC 2020-X42 - 2020 XX - see above Grabbed MPEC 2020-X43 - 2020 XY - see above Grabbed MPEC 2020-X44 - 2020 XZ - see above Grabbed MPEC 2020-X45 - 2020 XA1 - see above Grabbed MPEC 2020-X46 - 2020 XB1 - see above Grabbed MPEC 2020-X47 - 2020 XC1 - see above Grabbed MPEC 2020-X48 - 2020 XD1 - see above Grabbed MPEC 2020-X49 - 2020 XE1 - see above Grabbed MPEC 2020-X50 - 2020 XF1 - see above Grabbed MPEC 2020-X51 - Daily Orbit Update - see above Grabbed MPEC 2020-X52 - 2020 XG1 - see above Grabbed MPEC 2020-X53 - 2020 XH1 - see above
0615	Noted that JPL Sentry has updated its 2007 YM risk assessment - see above Noted that JPL Sentry has updated its 2010 XQ risk assessment - see above Noted that JPL Sentry has updated its 2015 VO142 risk assessment - see above Noted that JPL Sentry has updated its 2020 HW7 risk assessment - see above Noted that JPL Sentry has posted 2020 XR as an impact risk - see above Grabbed MPEC 2020-X34 - 2020 XP - see above Grabbed MPEC 2020-X35 - 2020 XQ - see above Grabbed MPEC 2020-X36 - 2020 XR - see above Grabbed MPEC 2020-X37 - 2020 XS - see above

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