2020-12-12 Tracking News

Contents on 12 December '20

IAU Minor Planet Center
- NEOCP Activity -- 84 listings
- New MPECs -- nineteen MPECs
Observers -- 32 observers
Impact Risk Monitoring -- seventeen objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1232 risk-listed objects, 152 have had news in the last 31 days. Updated at 1804 UTC on 12 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 12 December '20

The MPC's NEO Confirmation Page has 84 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 84 objects listed. Of these, 45 were "one nighters." So far The Tracking News has counted a total of 109 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 12 December '20

Minor Planet Electronic Circulars

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

MPEC 2020-X122 time-stamped "02:41 UT" - 2020 XN3 - see below
MPEC 2020-X123 time-stamped "03:40 UT" - 2020 XP3 - see below
MPEC 2020-X124 time-stamped "03:43 UT" - 2020 XQ3 - see below
MPEC 2020-X125 time-stamped "03:44 UT" - 2020 XR3 - see below
MPEC 2020-X126 time-stamped "03:45 UT" - 2020 XS3 - see below
MPEC 2020-X127 time-stamped "12:21 UT" - Daily Orbit Update - see below
MPEC 2020-X128 time-stamped "13:57 UT" - 2020 XT3 - see below
MPEC 2020-X129 time-stamped "13:58 UT" - 2020 XU3 - see below
MPEC 2020-X130 time-stamped "13:59 UT" - 2020 XV3 - see below
MPEC 2020-X131 time-stamped "14:11 UT" - 2020 XW3 - see below
MPEC 2020-X132 time-stamped "14:14 UT" - 2020 XX3 - see below
MPEC 2020-X133 time-stamped "14:15 UT" - 2020 XY3 - see below
MPEC 2020-X134 time-stamped "14:18 UT" - 2020 XZ3 - see below
MPEC 2020-X135 time-stamped "14:19 UT" - 2020 XA4 - see below
MPEC 2020-X136 time-stamped "14:20 UT" - 2020 XB4 - see below
MPEC 2020-X137 time-stamped "16:19 UT" - 2016 YU10 - see below
MPEC 2020-X138 time-stamped "18:07 UT" - 2009 XL8 - see below
MPEC 2020-X139 time-stamped "19:08 UT" - 2020 XC4 - see below
MPEC 2020-X140 time-stamped "19:13 UT" - 2020 XD4

MPEC 2020-X140 - "19:13 UT" - 2020 XD4

K20X04D 2020 XD4 (i=39.6°, H=20.2 ~309m) was picked up at 1015 UT on 9 Dec. by Pan-STARRS 1 (PS1), observing it at Dec. 9.43-47p4 at w=22.16-81. This detection was confirmed by Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Dec. 10.13-15p3 at G=21.5-9, 11.17-18p3 at G=22.2-3 & 12.16-17p3 at G=22.2), Astronomical Research Obs. Westfield (Dec. 10.20-21p3 at V=21.9-22.4), and Pan-STARRS 2 (PS2) (Dec. 10.36-39p2).

MPEC 2020-X139 - "19:08 UT" - 2020 XC4

K20X04C 2020 XC4 (Earth MOID=2.0 LD, H=26.0 ~21m) was picked up at 0235 UT on 9 Dec. by the Mt. Lemmon Survey (MLS), observing it at Dec. 9.11-12p3. This detection was confirmed by Steward Obs. Mt. Lemmon Station (Dec. 9.20p4), PS1 (Dec. 12.23-25p2), Visnjan Obs. (Dec. 12.73p5), Great Shefford Obs. (Dec. 12.73-74p4), Paus Obs. (Dec. 12.74-75p4), and Farra d'Isonzo Obs. (Dec. 12.77-78p3).

MPEC 2020-X138 - "18:07 UT" - 2009 XL8

K09X08L 2009 XL8 (small asteroid, H=22.5 ~107m) from PS2 (Dec. 11.41-44p4) and Steward Mt. Lemmon Sta. (Dec. 12.25p2)

MPEC 2020-X137 - "16:19 UT" - 2016 YU10

K16Y10U 2016 YU10 (H=19.0 ~537m) from program code 5 via ESA Optical Ground Station (ESA OGS) (Dec. 11.12-14p4 & 12.25-26p3)

MPEC 2020-X136 - "14:20 UT" - 2020 XB4

K20X04B 2020 XB4 (small asteroid, H=23.8 ~59m) was picked up at 1024 UT on 9 Dec. by the Bok Telescope, observing it at Dec. 9.43-45p4 at G=21.7-22.3 and 9.51p3 at G=21.5-22.2. This detection was confirmed by ARO Westfield (Dec. 10.26-27p4 at V=21.9-22.2) and the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (Dec. 12.36-37p4 at G=21.41-22.32).

MPEC 2020-X135 - "14:19 UT" - 2020 XA4

K20X04A 2020 XA4 (Q=4.020 AU, H=21.1 ~204m) was picked up at 0804 UT on 9 Dec. by MLS, observing it at Dec. 9.34-35p3 at G=20.98-22.06. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 9.41-43p3), Mt. John Obs. (Dec. 9.60-61p4), PS1 (Dec. 10.44-48p4), and CSS-Kuiper (Dec. 12.25-26p4).

MPEC 2020-X134 - "14:18 UT" - 2020 XZ3

K20X03Z 2020 XZ3 (H=20.7 ~245m) was picked up at 1013 UT on 9 Dec. by MLS, observing it at Dec. 9.43-44p3. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 9.51-52p3 & 12.39-40p4), Mt. John Obs. (Dec. 9.62-63p4), ARO Westfield (Dec. 10.35p2), Holmes/CTIO (Dec. 11.21-22p3), and PS1 (Dec. 11.55-56p2).

MPEC 2020-X133 - "14:15 UT" - 2020 XY3

K20X03Y 2020 XY3 (H=20.3 ~295m) was picked up at 0925 UT on 9 Dec. by Bok Tel., observing it at Dec. 9.39-41p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 9.48p3), ARO Westfield (Dec. 10.14-16p3), program code 2 via ESA Optical Ground Station (ESA OGS) (Dec. 10.94-95p3), PS2 (Dec. 11.45-47p4), and CSS-Kuiper (Dec. 12.26-27p4).

MPEC 2020-X132 - "14:14 UT" - 2020 XX3

K20X03X 2020 XX3 (risk listed, Earth MOID=0.0 LD, H=28.5 ~7m, close passer) was picked up at 0638 UT on 10 Dec. by PS1, observing it at Dec. 10.28-32p4. This detection was confirmed by Xingming Obs. #3 (Dec. 10.80-81p2 & 10.87-88p2), ESA OGS/code 2 (Dec. 10.91-92p3), Visnjan Obs. (Dec. 11.00-01p3), ARO Westfield (Dec. 11.11-12p3), Steward Mt. Lemmon Sta. (Dec. 12.28p2), and the Spacewatch 0.9m telescope (Dec. 12.33-35p3).

MPEC 2020-X131 - "14:11 UT" - 2020 XW3

K20X03W 2020 XW3 (small asteroid, Earth MOID=7.9 LD, H=25.66 ~25m) was picked up at 1024 UT on 9 Dec. by Bok Tel., observing it at Dec. 9.43-45p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 9.53p3 & 12.29-31p2), Visnjan Obs. (Dec. 10.02-03p3), ARO Westfield (Dec. 10.22-23p2), and the Spacewatch 1.8m telescope (Dec. 12.28-29p3).

MPEC 2020-X130 - "13:59 UT" - 2020 XV3

K20X03V 2020 XV3 (small asteroid, H=22.9 ~89m) was picked up at 0759 UT on 10 Dec. by PS1, observing it at Dec. 9.42p2 and 10.33-36p3. This detection was confirmed by program code 4 via ESA Optical Ground Station (ESA OGS) (Dec. 10.92-94p3), Holmes/CTIO (Dec. 11.18p3), ARO Westfield (Dec. 11.19-20p3), Steward Mt. Lemmon Sta. (Dec. 12.28p4), and Spacewatch 0.9m (Dec. 12.37-39p3).

MPEC 2020-X129 - "13:58 UT" - 2020 XU3

K20X03U 2020 XU3 (small asteroid, H=22.4 ~112m) was picked up at 0757 UT on 10 Dec. by PS1, observing it at Dec. 8.36-39p4 at G=21.79-23.04 and 10.33-36p3 at w=21.72-84. This detection was confirmed by Holmes/CTIO (Dec. 11.15-16p3), ARO Westfield (Dec. 11.16-18p2), and Spacewatch 0.9m (Dec. 12.36-38p2).

MPEC 2020-X128 - "13:57 UT" - 2020 XT3

K20X03T 2020 XT3 (small asteroid, H=22.6 ~102m) was picked up at 0622 UT on 10 Dec. by PS1, observing it at Dec. 10.27-30p3. This detection was confirmed by MLS (Nov. 21.26-27p3 & Dec. 4.27-29p2) and CSS-Kuiper (Dec. 12.24-25p4 at G=21.58-22.34).

<< DOU on 12 December '20 >> MPEC 2020-X127 - "12:21 UT" - Daily Orbit Update

Observations of risk-listed objects
K20X02V 2020 XV2 (small asteroid, Q=4.598 AU, arc=3 days, H=23.5 ~68m) from MLS (Dec. 12.39-41p4)
K20X02H 2020 XH2 (small asteroid, arc=4 days, H=27.1 ~13m, close passer, NHATS target) from Steward Mt. Lemmon Sta. (Dec. 12.42-43p4)
K20X00Z 2020 XZ (small asteroid, arc=6 days, H=26.1 ~20m) from program code "!" (10) via ESA Optical Ground Station (ESA OGS) (Dec. 11.21p2)
K20X00R 2020 XR (Q=4.036 AU, arc=8 days, H=19.7 ~389m) from ESA OGS/code 2 (Dec. 10.82p3) and Spacewatch 0.9m (Dec. 12.07p3)
K20X00F 2020 XF (small asteroid, arc=7 days, H=26.7 ~15m, close passer, NHATS target) from ESA OGS/code 2 (Dec. 10.84p3)
K20X00C 2020 XC (small asteroid, arc=7 days, H=29.0 ~5m, close passer, NHATS target) from UH/Tholen NEO Follow-Up 2.24m Telescope (Dec. 10.20p1)
K20W05F 2020 WF5 (small asteroid, arc=12 days, H=27.8 ~9m, close passer, NHATS target) from Tholen 2.24m (Dec. 9.62p1 at G=22.97)
K20W04T 2020 WT4 (small asteroid, arc=15 days, H=27.7 ~10m, NHATS target) from Tholen 2.24m (Dec. 9.37-38p2 at G=23.14-35)
K20W00D 2020 WD (small asteroid, arc=24 days, H=28.2 ~8m, close passer, NHATS target) from Tholen 2.24m (Dec. 10.49p1 at G=24.39)
K20S04U 2020 SU4 (small asteroid, arc=78 days, H=23.9 ~56m) from Tholen 2.24m (Dec. 10.53p1 at G=23.52 & 10.62p1 at G=23.44)
Observations of recently (no longer) risk-listed objects
K20X01G 2020 XG1 (i=50.4°, arc=7 days, H=21.7 ~155m) from PS2 (Dec. 11.45-48p4) and Steward Mt. Lemmon Sta. (Dec. 12.44p4)
K20V03X 2020 VX3 (Q=4.480 AU, arc=31 days, H=21.3 ~186m) from PS1 (Dec. 11.46-50p4)
Observations of close-passing objects
K20X02B 2020 XB2 (arc=5 days, H=26.0 ~21m) from Steward Mt. Lemmon Sta. (Dec. 12.44-45p4)
K20X01H 2020 XH1 (arc=5 days, H=22.9 ~89m) from program code "*" (19) via Slooh.com Chile Obs. (Dec. 9.22-25p4 & 11.27-29p4), M. Kumrucu-Lohmiller via Slooh.com Chile Obs. (Dec. 11.21-22p3), and ATLAS Haleakala (Dec. 11.43-47p4)
K20X00O 2020 XO (arc=6 days, H=23.9 ~56m) from ATLAS Mauna Loa (Dec. 11.46-50p4) and program code 1 via Schwarzschild Obs. (Dec. 11.74p3)
K20X00N 2020 XN (arc=7 days, H=24.6 ~41m) from Northolt Branch Obs. (Dec. 11.83-84p4)
K20X00H 2020 XH (arc=8 days, H=24.6 ~41m) from ATLAS Mauna Loa (Dec. 11.52-53p4) and Steward Mt. Lemmon Sta. (Dec. 12.45p4)
K20W05Z 2020 WZ5 (arc=18 days, H=26.2 ~19m) from Steward Mt. Lemmon Sta. (Dec. 12.48-49p4)
K20W04Z 2020 WZ4 (arc=24 days, H=24.3 ~47m) from PS2 (Dec. 11.35-39p4)
K20O05K 2020 OK5 (arc=151 days, H=25.4 ~28m, NHATS target) from ATLAS Mauna Loa (Dec. 11.55-57p4)
o1647 501647 2014 SD224 from LCO McDonald Obs. B (Dec. 11.45p8)
Observation campaigns (NHATS targets, radar support)
K20W00Y 2020 WY (arc=25 days, H=26.2 ~19m, NHATS) from PS2 (Dec. 11.36-39p3)
K20F01T 2020 FT1 (arc=2 opp, H=22.5 ~107m, NHATS) from PS1 (Dec. 11.60-63p4)
K11G60D 2011 GD60 (arc=4 opp, H=21.8 ~148m, NHATS) from the Zwicky Transient Facility (ZTF) (Dec. 11.27-28p3 & 11.37p1)
E3404 143404 2003 BD44 (radar) from PS1 (Dec. 11.28-30p3)
11398 11398 1998 YP11 (radar) from PS2 (Dec. 11.26-30p4) and PS1 (Dec. 11.36-39p3)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20X03P 2020 XP3 (q=0.347 AU, arc=5 days, H=24.7 ~39m) from Steward Mt. Lemmon Sta. (Dec. 12.23p3)
K20X02Q 2020 XQ2 (i=41.8°, arc=3 days, H=22.7 ~98m) from ATLAS Mauna Loa (Dec. 11.43-45p4) and Northolt Branch Obs. (Dec. 11.84-85p3)
K20X02P 2020 XP2 (arc=5 days, H=22.1 ~129m) from Steward Mt. Lemmon Sta. (Dec. 12.46p4)
K20X02N 2020 XN2 (arc=4 days, H=23.3 ~74m) from GINOP-KHK (Dec. 11.84p3)
K20X01P 2020 XP1 (arc=6 days, H=24.3 ~47m) from Steward Mt. Lemmon Sta. (Dec. 12.43p4)
K20X00Y 2020 XY (arc=7 days, H=25.6 ~26m) from PS2 (Dec. 11.44-47p4) and Steward Mt. Lemmon Sta. (Dec. 12.44p4)
K20X00U 2020 XU (arc=6 days, H=22.9 ~89m) from PS2 (Dec. 11.45-47p4)
K20X00J 2020 XJ (arc=8 days, H=25.2 ~31m) from Steward Mt. Lemmon Sta. (Dec. 12.43-44p3)
K20W04P 2020 WP4 (arc=19 days, H=22.1 ~129m) from Steward Mt. Lemmon Sta. (Dec. 12.47-48p4)
K20V07C 2020 VC7 (arc=37 days, H=23.9 ~56m) from Paus Obs. (Dec. 11.81-83p3)
K20V01X 2020 VX1 (arc=31 days, H=22.9 ~89m) from PS2 (Dec. 11.30-34p4)
K20V01E 2020 VE1 (arc=37 days, H=22.8 ~93m) from ARO Westfield (Dec. 11.11p3 at V=22.1-4)
K20U06T 2020 UT6 (arc=63 days, H=23.1 ~81m) from PS1 (Dec. 11.26-30p4 at w=21.9-22.2)
K18X03U 2018 XU3 (arc=2 opp, H=25.4 ~28m) from Schwarzschild Obs./code 1 (Dec. 11.83p3)
K20W04W 2020 WW4 (arc=19 days, H=21.8 ~148m) from Steward Mt. Lemmon Sta. (Dec. 12.47p2)
K20W01G 2020 WG1 (arc=58 days, H=22.0 ~135m) from ARO Westfield (Dec. 11.03-05p3 at V=21.9-22.2)
K20S01T 2020 ST1 (arc=105 days, H=22.0 ~135m) from Althuraya Astronomy Ctr. (Nov. 18.77-79p4)
K16Y00M 2016 YM (arc=3 opp, H=22.0 ~135m) from ATLAS Mauna Loa (Dec. 11.49-51p3)
Observations of other objects
K20X03L 2020 XL3 (arc=3 days, H=21.3 ~186m) from Bok Tel. (Dec. 12.44-46p4)
K20X02M 2020 XM2 (Q=4.060 AU, arc=6 days, H=19.6 ~407m) from Steward Mt. Lemmon Sta. (Dec. 12.45p4)
K20X01N 2020 XN1 (i=36.8°, Q=4.007 AU, arc=23 days, H=19.8 ~371m) from ATLAS Haleakala (Dec. 11.45-49p4)
K20X00Q 2020 XQ (arc=28 days, H=21.4 ~178m) from PS2 (Dec. 11.40-44p4)
K20W05M 2020 WM5 (Q=4.837 AU, arc=14 days, H=20.9 ~224m) from ATLAS Mauna Loa (Dec. 11.58p3) and Steward Mt. Lemmon Sta. (Dec. 12.45-46p4)
K20W05A 2020 WA5 (arc=16 days, H=21.5 ~170m) from ATLAS Mauna Loa (Dec. 11.50-57p4)
K20W02T 2020 WT2 (arc=22 days, H=21.0 ~214m) from Steward Mt. Lemmon Sta. (Dec. 12.44p4)
K20W01L 2020 WL1 (arc=25 days, H=19.9 ~355m) from PS1 (Dec. 11.51-54p3)
K20V03M 2020 VM3 (arc=31 days, H=20.8 ~234m) from ZTF (Dec. 11.39-43p3 & 11.49p2)
K20O08C 2020 OC8 (arc=179 days, H=20.8 ~234m) from ATLAS Haleakala (Dec. 11.38-40p4)
K20N01Q 2020 NQ1 (Q=4.092 AU, arc=153 days, H=20.4 ~282m) from ARO Westfield (Dec. 11.00-03p3 at V=22.0-22.2)
K20H04J 2020 HJ4 (arc=2 opp, H=20.0 ~339m) from Spacewatch 1.8m (Dec. 12.07p2 at R=21.6-22.4)
K19B01O 2019 BO1 (arc=3 opp, H=19.6 ~407m) from PS2 (Dec. 11.49-52p4)
K18V00X 2018 VX (arc=3 opp, H=21.0 ~214m) from PS1 (Dec. 11.45-49p3)
K18G04X 2018 GX4 (arc=4 opp, H=19.2 ~490m) from ATLAS Mauna Loa (Dec. 11.49-54p4)
K17S19E 2017 SE19 (arc=3 opp, H=19.8 ~371m) from ATLAS Haleakala (Dec. 11.32-34p4)
K16O05P 2016 OP5 (arc=4 opp, H=20.9 ~224m) from ATLAS Haleakala (Dec. 11.32-34p4)
K16C32B 2016 CB32 (Q=4.713 AU, arc=3 opp, H=18.7 ~616m) from PS1 (Dec. 11.52-54p3)
K15B04F 2015 BF4 (arc=6 opp, H=20.5 ~269m) from ATLAS Haleakala (Dec. 11.36-40p8)
K14WK1D 2014 WD201 (arc=4 opp, H=19.2 ~490m) from PS1 (Dec. 11.28-30p3)
K14QT6K 2014 QK296 (arc=5 opp, H=18.4 ~708m) from PS1 (Dec. 11.59-61p3)
K14L26Q 2014 LQ26 (Q=5.150 AU, arc=2 opp, H=18.3 ~741m) from PS2 (Dec. 11.35-39p4)
K14J57H 2014 JH57 (Q=6.247 AU, arc=5 opp, H=16.2 ~1.95 km) from ZTF (Dec. 10.55-57p4)
K13U14X 2013 UX14 (arc=4 opp, H=18.3 ~741m) from Visnjan Obs. (Dec. 11.81-82p8)
K13P06Y 2013 PY6 (arc=4 opp, H=19.4 ~446m) from Blue Mountains Obs. (Dec. 8.55-59p6), PS1 (Dec. 11.26-30p4), and ATLAS Haleakala (Dec. 11.38-41p4)
K13B27G 2013 BG27 (arc=5 opp, H=20.4 ~282m) from PS1 (Dec. 11.38-39p2)
K10X58X 2010 XX58 (q=0.305 AU, Q=4.172 AU, arc=3 opp, H=18.5 ~676m) from PS1 (Dec. 11.45-49p3)
K09K08K 2009 KK8 (arc=3 opp, H=18.7 ~616m) from PS2 (Dec. 12.21-25p4)
K07X10B 2007 XB10 (i=41.3°, arc=5 opp, H=17.7 ~977m) from PS2 (Dec. 11.45-46p3)
K04Q17D 2004 QD17 (arc=5 opp, H=19.8 ~371m) from PS2 (Dec. 12.21-25p4)
K04L03U 2004 LU3 (arc=5 opp, H=18.4 ~708m) from ZTF (Dec. 11.16p1, 11.21p2 & 11.25-28p2) and ATLAS Haleakala (Dec. 11.38-40p4)
K03Y01M 2003 YM1 (arc=3 opp, H=18.1 ~812m) from PS2 (Dec. 11.49-52p2)
K03Y00J 2003 YJ (arc=4 opp, H=20.3 ~295m) from ATLAS Haleakala (Dec. 11.39-41p6)
K03Q10Q 2003 QQ10 (arc=2 opp, H=19.5 ~426m) from PS2 (Dec. 11.40-43p3)
K03B47K 2003 BK47 (Q=4.689 AU, arc=5 opp, H=17.8 ~933m) from ATLAS Haleakala (Dec. 11.57-58p4)
K02G08Z 2002 GZ8 (Q=4.633 AU, arc=4 opp, H=18.7 ~616m) from ATLAS Mauna Loa (Dec. 11.56-58p4)
K01Y03V 2001 YV3 (arc=3 opp, H=20.4 ~282m) from Steward Mt. Lemmon Sta. (Dec. 12.47p3)
J99V15X 1999 VX15 (Q=4.807 AU, arc=2 opp, H=18.8 ~589m) from ATLAS Haleakala (Dec. 11.45-47p4)
J99H01V 1999 HV1 (arc=7 opp, H=17.5 ~1.07 km) from PS1 (Dec. 11.27-31p4)
J98W02A 1998 WA2 (Q=4.271 AU, arc=2 opp, H=19.8 ~371m) from PS2 (Dec. 11.31-35p3)
J98M24R 1998 MR24 (arc=5 opp, H=19.2 ~490m) from PS2 (Dec. 11.21-24p3)
J93H00C 1993 HC (arc=2 opp, H=20.6 ~257m) from PS2 (Dec. 11.25-27p3)
r0938 530938 2011 XE from Blue Mountains Obs. (Dec. 7.46-47p4 & 8.46-47p4)
q5364 525364 2005 CL7 from Spacewatch 1.8m (2017 March 2.53p2)
q3804 523804 2000 YF29 from PS2 (Dec. 11.26-29p4)
q3633 523633 2009 XR2 from ATLAS Haleakala (Dec. 11.61-63p4)
p8640 518640 2008 KZ5 from Tholen 2.24m (2010 Feb. 21.46p2 at G=23.79-24.01)
p3170 513170 2004 KH15 from Spacewatch 1.8m (2017 April 21.15-16p2)
o6459 506459 2002 AL14 from ATLAS Haleakala (Dec. 11.62-65p4)
o5093 505093 2011 VQ5 from ZTF (Dec. 11.37-43p3 & 11.49p1) and ATLAS Mauna Loa (Dec. 11.54-62p4)
n7094 497094 2004 AH from ATLAS Haleakala (Dec. 11.51-55p4)
n0581 490581 2009 WZ104 from Spacewatch 1.8m (2016 Dec. 9.09-11p2)
m8450 488450 1994 JX from PS1 (Dec. 11.59-63p3 at w=22.0-22.5)
m6001 486001 2012 MR7 from Spacewatch 1.8m (2017 Jan. 28.12p2)
m2505 482505 2012 TQ78 from ATLAS Mauna Loa (Dec. 11.64-66p4)
m0858 480858 2001 PT9 from Spacewatch 1.8m (2016 Dec. 30.23-24p2)
m0824 480824 1999 JO6 from PS2 (Dec. 11.23-25p3)
k5749 465749 2009 WO6 from ATLAS Mauna Loa (Dec. 11.53-55p4) and PS1 (Dec. 11.60-62p3)
j5185 455185 2000 EB107 from PS1 (Dec. 11.56-58p3)
j2307 452307 Manawydan (1997 XV11) from PS2 (Dec. 11.31-34p4) and ATLAS Haleakala (Dec. 11.39-41p4)
j0263 450263 2003 WD158 from ATLAS Haleakala (Dec. 11.41-44p4)
i9107 449107 2012 VJ82 from ATLAS Haleakala (Dec. 11.57-59p4)
h5404 435404 2008 AT28 from ATLAS Haleakala (Dec. 11.46-50p4)
g3022 423022 2003 TJ2 from PS1 (Dec. 11.59-62p4)
f8797 418797 2008 VF from PS2 (Dec. 12.21-25p6)
f7217 417217 2005 YS from ATLAS Mauna Loa (Dec. 11.32-38p8)
f5029 415029 2011 UL21 from ATLAS Mauna Loa (Dec. 11.49-51p4)
f4903 414903 2010 XT45 from PS2 (Dec. 11.26-30p4)
f4586 414586 2009 UV18 from ATLAS Haleakala (Dec. 11.34-37p4)
b8160 378160 2006 WX1 from ATLAS Mauna Loa (Dec. 11.37-40p4)
b4855 374855 2006 VQ13 from PS1 (Dec. 11.55-57p3)
b3579 373579 2002 AW11 from ZTF (Dec. 7.18-21p5), PS2 (Dec. 11.38-39p2), and ATLAS Haleakala (Dec. 11.41-44p4)
Z1340 351340 2004 YC5 from ATLAS Haleakala (Dec. 11.21-23p4)
Y9074 349074 2007 BM8 from PS2 (Dec. 11.53-56p4)
R4138 274138 2008 FU6 from ATLAS Haleakala (Dec. 11.51-52p4)
O1596 241596 1998 XM2 from ATLAS Haleakala (Dec. 11.53-54p3)
L6707 216707 2004 XP164 from ATLAS Haleakala (Dec. 11.57-59p4)
I9040 189040 2000 MU1 from Spacewatch 0.9m (Dec. 8.35-37p3 & 9.49-50p2)
G3902 163902 2003 SW222 from ATLAS Mauna Loa (Dec. 11.43-45p4)
G3243 163243 2002 FB3 from ZTF (Dec. 11.55-57p5)
G3014 163014 2001 UA5 from ATLAS Haleakala (Dec. 11.25-28p4)
G2186 162186 1999 OP3 from PS2 (Dec. 11.53-56p4)
G2173 162173 Ryugu (1999 JU3) from ATLAS Haleakala (Dec. 11.25-28p8)
F9923 159923 2004 YJ32 from PS1 (Dec. 11.50-52p3)
F9402 159402 1999 AP10 from ATLAS Mauna Loa (Dec. 11.56-57p4)
F5340 155340 2006 SK198 from ZTF (Dec. 11.56p3)
F4330 154330 2002 VX94 from ATLAS Mauna Loa (Dec. 11.37-39p4)
F4302 154302 2002 UQ3 from Blue Mountains Obs. (Dec. 7.49p4, 7.56-57p4, 8.49p4 & 8.54p4)
F3201 153201 2000 WO107 from Althuraya Astronomy Ctr. (Dec. 10.61-65p3)
F2931 152931 2000 EA107 from ZTF (Dec. 10.55-57p4 & 11.55-57p4)
E5656 145656 4788 P-L from PS2 (Dec. 12.21-23p3)
E4411 144411 2004 EW9 from ZTF (Dec. 11.16-19p2 & 11.25p2)
E3649 143649 2003 QQ47 from ZTF (Dec. 11.55-57p4)
E1079 141079 2001 XS30 from ATLAS Haleakala (Dec. 11.54-61p4)
D8175 138175 2000 EE104 from ATLAS Mauna Loa (Dec. 11.52-53p4)
D8095 138095 2000 DK79 from Blue Mountains Obs. (Dec. 7.44-45p4, 7.50p3, 8.44-45p2 & 8.50p3)
D7924 137924 2000 BD19 from ZTF (Dec. 10.55-57p4)
D7805 137805 1999 YK5 from ATLAS Haleakala (Dec. 11.20-22p3)
D7099 137099 1998 YW3 from PS2 (Dec. 11.52-56p4)
D7062 137062 1998 WM from ZTF (Dec. 11.55-57p4)
D7052 137052 Tjelvar (1998 VO33) from ZTF (Dec. 11.56-57p4)
89355 89355 2001 VS78 from ZTF (Dec. 11.38-40p2 & 11.46p3)
88188 88188 2000 XH44 from ZTF (Dec. 11.24p1, 11.37-43p3 & 11.49p1) and ATLAS Mauna Loa (Dec. 11.47-48p3)
87684 87684 2000 SY2 from Blue Mountains Obs. (Dec. 7.48p4, 8.48p4 & 8.53p4)
86039 86039 1999 NC43 from ZTF (Dec. 11.07-09p5) and ATLAS Haleakala (Dec. 11.21-22p3)
85867 85867 1999 BY9 from PS2 (Dec. 11.21-24p3)
85490 85490 1997 SE5 from PS1 (Dec. 11.51-54p6 at w=21.6-22.1)
85275 85275 1994 LY from Blue Mountains Obs. (Dec. 7.64-69p8 & 8.62-66p8)
68950 68950 2002 QF15 from ZTF (Dec. 11.07-09p4 & 12.09p1)
68359 68359 2001 OZ13 from Blue Mountains Obs. (Dec. 7.60-62p4 & 8.57-61p6), ZTF (Dec. 11.17-26p5 & 11.37p1), PS2 (Dec. 11.25-29p4), and ATLAS Haleakala (Dec. 11.35-37p4)
66272 66272 1999 JW6 from ATLAS Mauna Loa (Dec. 11.39-41p3) and PS2 (Dec. 11.40-43p3)
65717 65717 1993 BX3 from Blue Mountains Obs. (Dec. 7.59-62p8 & 8.56-60p8)
55532 55532 2001 WG2 from PS2 (Dec. 11.31-35p4) and ATLAS Haleakala (Dec. 11.40-42p4)
53435 53435 1999 VM40 from ATLAS Mauna Loa (Dec. 11.53-55p4)
31669 31669 1999 JT6 from ZTF (Dec. 11.55-57p5)
30825 30825 1990 TG1 from ATLAS Haleakala (Dec. 11.23-25p7)
26310 26310 1998 TX6 from PS1 (Dec. 11.26-30p4)
25916 25916 2001 CP44 from PS2 (Dec. 11.53-56p4)
24445 24445 2000 PM8 from ZTF (Dec. 11.55-57p5)
21374 21374 1997 WS22 from ATLAS Mauna Loa (Dec. 11.53-54p4)
12538 12538 1998 OH from AAAA Buenos Aires Obs. (Dec. 12.10p1 & 12.15p1)
10150 10150 1994 PN from ATLAS Haleakala (Dec. 11.45-50p4)
09172 9172 Abhramu (1989 OB) from SATINO-1 (Aug. 20.82-83p2) and ATLAS Haleakala (Dec. 11.25-27p4)
08567 8567 1996 HW1 from ATLAS Haleakala (Dec. 11.55-56p4)
05620 5620 Jasonwheeler (1990 OA) from PS1 (Dec. 11.51-54p3)
05587 5587 1990 SB from Blue Mountains Obs. (Dec. 8.63p4) and ATLAS Haleakala (Dec. 11.39-41p4)
04953 4953 1990 MU from Blue Mountains Obs. (Dec. 7.47p4, 7.53p3, 8.47p4 & 8.52p4)
04947 4947 Ninkasi (1988 TJ1) from ATLAS Haleakala (Dec. 11.26-28p4)
04503 4503 Cleobulus (1989 WM) from Tentlingen Obs. (Dec. 10.88-94p3) and ATLAS Haleakala (Dec. 11.32-34p4)
04055 4055 Magellan (1985 DO2) from Blue Mountains Obs. (Dec. 7.63-68p8 & 8.64-65p4)
03908 3908 Nyx (1980 PA) from ATLAS Haleakala (Dec. 11.25-28p4)
03691 3691 Bede (1982 FT) from ZTF (Dec. 11.09-13p3 & 11.18p1)
03552 3552 Don Quixote (1983 SA) from PS1 (Dec. 11.59-63p4)
02329 2329 Orthos (1976 WA) from ZTF (Dec. 11.56-57p4)
02212 2212 Hephaistos (1978 SB) from PS2 (Dec. 11.21-24p4)
01981 1981 Midas (1973 EA) from ATLAS Haleakala (Dec. 11.22-25p4)
01943 1943 Anteros (1973 EC) from ATLAS Haleakala (Dec. 11.63-66p4)
01685 1685 Toro (1948 OA) from ATLAS Haleakala (Dec. 11.63-66p4)
01036 1036 Ganymed (1924 TD) from ATLAS Haleakala (Dec. 11.54-60p4) and AAAA Buenos Aires Obs. (Dec. 12.17-19p2)
00887 887 Alinda (1918 DB) from Blue Mountains Obs. (Dec. 7.45-46p4, 7.51-52p4, 8.45-46p4 & 8.50-51p4)
00433 433 Eros (1898 DQ) from ATLAS Haleakala (Dec. 11.64-67p4)

MPEC 2020-X126 - "03:45 UT" - 2020 XS3

K20X03S 2020 XS3 (small asteroid, H=25.0 ~34m) was picked up at 0631 UT on 10 Dec. by PS1, observing it at Dec. 10.27-31p4. This detection was confirmed by PS2 (Dec. 8.40-44p4), Visnjan Obs. (Dec. 10.99p4), ARO Westfield (Dec. 11.19p3), and Schwarzschild Obs./code 1 (Dec. 11.76p3).

MPEC 2020-X125 - "03:44 UT" - 2020 XR3

K20X03R 2020 XR3 (small asteroid, H=22.7 ~98m) was picked up at 0850 UT on 8 Dec. by PS1, observing it at Dec. 8.37-39p3. This detection was confirmed by PS2 (Dec. 5.46p1, 7.33-34p2 & 11.34p1), Steward Mt. Lemmon Sta. (Dec. 9.21-23p4), Holmes/CTIO (Dec. 9.21-23p3), and ARO Westfield (Dec. 10.13-15p3).

MPEC 2020-X124 - "03:43 UT" - 2020 XQ3

K20X03Q 2020 XQ3 (small asteroid, H=24.9 ~35m) was picked up at 0533 UT on 7 Dec. by PS1, observing it at Dec. 7.23-27p3 at w=22.17-45 and 11.22-26p3 at G=21.90-22.04. This detection was confirmed by Spacewatch 1.8m (Dec. 8.36-38p3 at R=21.8-22.1), Tholen 2.24m (Dec. 9.22-23p2 at G=22.37-55), Spacewatch 0.9m (Dec. 9.32-36p2 at R=21.8-22.5), and ARO Westfield (Dec. 10.14p2 at V=22.1-4).

MPEC 2020-X123 - "03:40 UT" - 2020 XP3

K20X03P 2020 XP3 (small asteroid, q=0.348 AU, Earth MOID=1.8 LD, H=24.7 ~39m) was picked up at 0807 UT on 10 Dec. by PS1, observing it at Dec. 10.34-36p3. This detection was confirmed by PS2 (Dec. 7.35-39p4 & 11.29-30p3), ESA OGS/code 2 (Dec. 10.85-86p3), Holmes/CTIO (Dec. 11.11-12p3), Visnjan Obs. (Dec. 11.73p3), and Schwarzschild Obs./code 1 (Dec. 11.73p2 & 11.86p4).

MPEC 2020-X122 - "02:41 UT" - 2020 XN3

K20X03N 2020 XN3 (small asteroid, Earth MOID=9.3 LD, H=22.9 ~89m) was picked up at 0751 UT on 9 Dec. by PS1, observing it at Dec. 5.36-40p3, 6.39-42p3, and 9.33-36p3. This detection was confirmed by ARO Westfield (Dec. 10.05-06p3), Tebbutt Obs. (Dec. 10.06p1 & 10.12p1), ESA OGS/code 4 (Dec. 10.85p3), Schwarzschild Obs./code 1 (Dec. 11.75p2), Visnjan Obs. (Dec. 11.78-79p4), and Steward Mt. Lemmon Sta. (Dec. 12.06-07p4 at G=20.54-22.07).

Observers on 12 December '20

A total of 32 observers appear in today's MPECs.

Code	Observer / observatory
`834`	AAAA Buenos Aires Obs. in Argentina, 2 in MPEC 2020-X127 -- 12538, 1036
`M46`	Althuraya Astronomy Ctr., 2 in MPEC 2020-X127 -- 2020 ST1, 153201
`H21`	Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2020-X122, 2020-X124, 2020-X125, 2020-X126, 2020-X127, 2020-X129, 2020-X130, 2020-X131, 2020-X132, 2020-X133, 2020-X134, 2020-X136 & 2020-X140 -- 2020 XZ3, 2020 XY3, 2020 XX3, 2020 XW3, 2020 XV3, 2020 XU3, 2020 XS3, 2020 XR3, 2020 XQ3, 2020 XN3, 2020 XD4, 2020 XB4, 2020 WG1, 2020 VE1, 2020 NQ1
`T05`	ATLAS Haleakala in Hawaii, 44 in MPEC 2020-X127 -- 2020 XN1, 2020 XH1, 2020 OC8, 2017 SE19, 2016 OP5, 2015 BF4, 2013 PY6, 2004 LU3, 2003 YJ, 2003 BK47, 1999 VX15, 86039, 68359, 55532, 523633, 506459, 497094, 452307, 450263, 449107, 435404, 414586, 373579, 351340, 30825, 274138, 241596, 216707, 163014, 162173, 141079, 137805, 10150, 9172, 8567, 5587, 4947, 4503, 3908, 1981, 1943, 1685, 1036, 433
`T08`	ATLAS Mauna Loa in Hawaii, 23 in MPEC 2020-X127 -- 2020 XQ2, 2020 XO, 2020 XH, 2020 WM5, 2020 WA5, 2020 OK5, 2018 GX4, 2016 YM, 2002 GZ8, 88188, 66272, 53435, 505093, 482505, 465749, 417217, 415029, 378160, 21374, 163902, 159402, 154330, 138175
`Q68`	Blue Mountains Obs. in New South Wales, 12 in MPEC 2020-X127 -- 2013 PY6, 87684, 85275, 68359, 65717, 530938, 154302, 138095, 5587, 4953, 4055, 887
`V00`	Bok Telescope in Arizona, 4 in MPECs 2020-X127, 2020-X131, 2020-X133 & 2020-X136 -- 2020 XY3, 2020 XW3, 2020 XL3, 2020 XB4
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 4 in MPECs 2020-X128, 2020-X133, 2020-X135 & 2020-X136 -- 2020 XY3, 2020 XT3, 2020 XB4, 2020 XA4
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2020-X123, 2020-X125, 2020-X129, 2020-X130, 2020-X134 & 2020-X140 -- 2020 XZ3, 2020 XV3, 2020 XU3, 2020 XR3, 2020 XP3, 2020 XD4
`J04!`	program code "!" (10) via ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2020-X127 -- 2020 XZ
`J042`	program code 2 via ESA Optical Ground Station (ESA OGS) in the Canary Islands, 5 in MPECs 2020-X123, 2020-X127, 2020-X132 & 2020-X133 -- 2020 XY3, 2020 XX3, 2020 XR, 2020 XP3, 2020 XF
`J044`	program code 4 via ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2020-X122 & 2020-X130 -- 2020 XV3, 2020 XN3
`J045`	program code 5 via ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2020-X137 -- 2016 YU10
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2020-X139 -- 2020 XC4
`K88`	GINOP-KHK in Hungary, 1 in MPEC 2020-X127 -- 2020 XN2
`J95`	Great Shefford Obs. in England, 1 in MPEC 2020-X139 -- 2020 XC4
`V39`	LCO McDonald Obs. B in Texas, 1 in MPEC 2020-X127 -- 501647
`474`	Mt. John Obs. in New Zealand, 2 in MPECs 2020-X134 & 2020-X135 -- 2020 XZ3, 2020 XA4
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2020-X127, 2020-X128, 2020-X134, 2020-X135 & 2020-X139 -- 2020 XZ3, 2020 XV2, 2020 XT3, 2020 XC4, 2020 XA4
`Z80`	Northolt Branch Obs. in England, 2 in MPEC 2020-X127 -- 2020 XQ2, 2020 XN
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 37 in MPECs 2020-X122, 2020-X123, 2020-X124, 2020-X125, 2020-X126, 2020-X127, 2020-X128, 2020-X129, 2020-X130, 2020-X132, 2020-X134, 2020-X135, 2020-X139 & 2020-X140 -- 2020 XZ3, 2020 XX3, 2020 XV3, 2020 XU3, 2020 XT3, 2020 XS3, 2020 XR3, 2020 XQ3, 2020 XP3, 2020 XN3, 2020 XD4, 2020 XC4, 2020 XA4, 2020 WL1, 2020 VX3, 2020 UT6, 2020 FT1, 2018 VX, 2016 CB32, 2014 WD201, 2014 QK296, 2013 PY6, 2013 BG27, 2010 XX58, 1999 HV1, 85490, 488450, 465749, 455185, 423022, 374855, 26310, 159923, 143404, 11398, 5620, 3552
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 40 in MPECs 2020-X123, 2020-X125, 2020-X126, 2020-X127, 2020-X133, 2020-X138 & 2020-X140 -- 2020 XY3, 2020 XY, 2020 XU, 2020 XS3, 2020 XR3, 2020 XQ, 2020 XP3, 2020 XG1, 2020 XD4, 2020 WZ4, 2020 WY, 2020 VX1, 2019 BO1, 2014 LQ26, 2009 XL8, 2009 KK8, 2007 XB10, 2004 QD17, 2003 YM1, 2003 QQ10, 1998 WA2, 1998 MR24, 1993 HC, 85867, 68359, 66272, 55532, 523804, 480824, 452307, 418797, 414903, 373579, 349074, 25916, 162186, 145656, 137099, 11398, 2212
`B49`	Paus Obs. in Spain, 2 in MPECs 2020-X127 & 2020-X139 -- 2020 XC4, 2020 VC7
`C95`	SATINO-1 in France, 1 in MPEC 2020-X127 -- 9172
`0331`	program code 1 via Schwarzschild Obs. in Germany, 5 in MPECs 2020-X122, 2020-X123, 2020-X126 & 2020-X127 -- 2020 XS3, 2020 XP3, 2020 XO, 2020 XN3, 2018 XU3
`W88*`	program code "*" (19) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-X127 -- 2020 XH1
`W885`	M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-X127 -- 2020 XH1
`691`	Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2020-X124, 2020-X127, 2020-X129, 2020-X130 & 2020-X132 -- 2020 XX3, 2020 XV3, 2020 XU3, 2020 XR, 2020 XQ3, 189040
`291`	Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2020-X124, 2020-X127 & 2020-X131 -- 2020 XW3, 2020 XQ3, 2020 HJ4, 525364, 513170, 490581, 486001, 480858
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 26 in MPECs 2020-X122, 2020-X125, 2020-X127, 2020-X130, 2020-X131, 2020-X132, 2020-X133, 2020-X134, 2020-X135, 2020-X138 & 2020-X139 -- 2020 XZ3, 2020 XY3, 2020 XY, 2020 XX3, 2020 XW3, 2020 XV3, 2020 XR3, 2020 XP3, 2020 XP2, 2020 XP1, 2020 XN3, 2020 XM2, 2020 XJ, 2020 XH2, 2020 XH, 2020 XG1, 2020 XC4, 2020 XB2, 2020 XA4, 2020 WZ5, 2020 WW4, 2020 WT2, 2020 WP4, 2020 WM5, 2009 XL8, 2001 YV3
`858`	Tebbutt Obs. in New Mexico, 1 in MPEC 2020-X122 -- 2020 XN3
`A16`	Tentlingen Obs. in Switzerland, 1 in MPEC 2020-X127 -- 4503
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 7 in MPECs 2020-X124 & 2020-X127 -- 2020 XQ3, 2020 XC, 2020 WT4, 2020 WF5, 2020 WD, 2020 SU4, 518640
`L01`	Visnjan Obs. in Croatia, 7 in MPECs 2020-X122, 2020-X123, 2020-X126, 2020-X127, 2020-X131, 2020-X132 & 2020-X139 -- 2020 XX3, 2020 XW3, 2020 XS3, 2020 XP3, 2020 XN3, 2020 XC4, 2013 UX14
`N88`	Xingming Obs. #3, 1 in MPEC 2020-X132 -- 2020 XX3
`I41`	Zwicky Transient Facility (ZTF) in southern California, 23 in MPEC 2020-X127 -- 2020 VM3, 2014 JH57, 2011 GD60, 2004 LU3, 89355, 88188, 86039, 68950, 68359, 505093, 373579, 31669, 24445, 163243, 155340, 152931, 144411, 143649, 137924, 137062, 137052, 3691, 2329

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

Impact Risk Monitoring on 12 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 XX3	NEODyS	1921	2057-2120	256	7.63e-03	-3.93	-4.35	n/a	NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2020-12-10.277 to 2020-12-12.348."
2020 XX3	JPL Sentry	1700	2057-2118	167	0.0019618678212	-4.56	-4.69	0	JPL: Computed at 07:45 today Pacific time based on 22 observations spanning 2.0705 days (2020-Dec-10.276407 to 2020-Dec-12.34692). Diameter approximately 0.007 km. from weighted mean H=28.57.

2020 XZ2	NEODyS	1921	2039-2079	25	1.0e-07	-5.50	-5.69	0	NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2020-12-07.341 to 2020-12-11.395."

2020 XV2	NEODyS	1921	R E M O V E D						-

2020 XH2	JPL Sentry	1700	R E M O V E D						JPL: Risk listing removed at 1432 UTC today

2020 XZ	JPL Sentry	1700	R E M O V E D						JPL: Risk listing removed at 1359 UTC today

2020 XR	NEODyS	1921	2028	1	1.69e-05	-1.44	-1.44	1	NEODyS: "Based on 58 optical observations (of which 1 are rejected as outliers) from 2020-12-04.213 to 2020-12-12.074."
2020 XR	JPL Sentry	1803	2028-2028	2	3.890821e-05	-1.07	-1.07	1	JPL: Computed at 09:28 today Pacific time based on 55 observations spanning 7.8612 days (2020-Dec-04.212236 to 2020-Dec-12.07342). Diameter approximately 0.390 km. from weighted mean H=19.71.

2020 XF	NEODyS	1921	2056-2120	542	1.06e-03	-4.00	-4.16	n/a	NEODyS: "Based on 64 optical observations (of which 0 are rejected as outliers) from 2020-12-04.328 to 2020-12-10.844."
2020 XF	JPL Sentry	1803	2056-2120	129	0.000359780862	-4.52	-5.04	0	JPL #2 for the day: Computed at 09:54 today Pacific time based on 64 observations spanning 6.5164 days (2020-Dec-04.32683 to 2020-Dec-10.843187). Diameter approximately 0.016 km. from weighted mean H=26.66.

2020 XC	NEODyS	1921	2085	1	7.09e-07	-8.42	-8.42	0	NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2020-12-03.363 to 2020-12-10.204."
2020 XC	JPL Sentry	1700	2085-2085	1	6.132e-07	-8.47	-8.47	0	JPL: Computed at 06:06 today Pacific time based on 48 observations spanning 6.8410 days (2020-Dec-03.36221 to 2020-Dec-10.203223). Diameter approximately 0.005 km. from weighted mean H=28.99.

2020 WF5	NEODyS	1921	2078-2118	36	1.24e-05	-6.51	-7.27	0	NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2020-11-27.232 to 2020-12-09.622."
2020 WF5	JPL Sentry	1700	2082-2118	21	1.720948e-05	-6.35	-7.10	0	JPL: Computed at 06:05 today Pacific time based on 33 observations spanning 12.390 days (2020-Nov-27.231322 to 2020-Dec-09.621335). Diameter approximately 0.010 km. from weighted mean H=27.75.

2020 WT4	NEODyS	1921	2062-2119	15	1.7e-06	-7.40	-7.64	0	NEODyS: "Based on 32 optical observations (of which 2 are rejected as outliers) from 2020-11-24.191 to 2020-12-09.380."
2020 WT4	JPL Sentry	1700	2062-2116	11	3.02501e-06	-7.10	-7.48	0	JPL: Computed at 06:14 today Pacific time based on 31 observations spanning 15.189 days (2020-Nov-24.190527 to 2020-Dec-09.379532). Diameter approximately 0.010 km. from weighted mean H=27.76.

2020 WD	NEODyS	1921	2055-2120	13	5.29e-05	-6.14	-6.32	n/a	NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2020-11-16.345 to 2020-12-10.496."
2020 WD	JPL Sentry	1700	2055-2120	6	8.86867e-05	-5.96	-6.17	0	JPL: Computed at 06:03 today Pacific time based on 32 observations spanning 24.150 days (2020-Nov-16.344565 to 2020-Dec-10.494752). Diameter approximately 0.008 km. from weighted mean H=28.21.

2020 SU4	NEODyS	1921	R E M O V E D						-
2020 SU4	JPL Sentry	1700	R E M O V E D						JPL: Risk listing removed at 1400 UTC today

2014 WZ365	JPL Sentry	1700	2047-2047	1	2.831e-10	-9.65	-9.65	0	JPL: Computed at 21:17 April 16th of 2017 Pacific time based on 23 observations spanning 3.9974 days (2014-Nov-27.367456 to 2014-Dec-01.36484). Diameter approximately 0.025 km. from weighted mean H=25.70.

2013 XS21	JPL Sentry	1700	2079-2111	10	7.79656e-06	-7.49	-7.79	0	JPL: Computed at 00:15 April 10th of 2017 Pacific time based on 25 observations spanning 1.6583 days (2013-Dec-12.48055 to 2013-Dec-14.13884). Diameter approximately 0.004 km. from weighted mean H=29.38.

2010 XC	JPL Sentry	1700	2021-2111	324	2.9148124e-06	-7.27	-7.94	0	JPL: Computed at 07:23 April 7th of 2017 Pacific time based on 8 observations spanning .05836 days (2010-Dec-01.30659 to 2010-Dec-01.36495). Diameter approximately 0.005 km. from weighted mean H=29.11.

2008 VS4	JPL Sentry	1700	2021-2114	308	5.751628e-07	-5.39	-6.30	0	JPL: Computed at 00:23 April 8th of 2017 Pacific time based on 10 observations spanning .08330 days (2008-Nov-07.413 to 2008-Nov-07.4963). Diameter approximately 0.049 km. from weighted mean H=24.21.

2004 XG29	JPL Sentry	1700	2112-2114	2	2.4861e-07	-7.24	-7.37	0	JPL: Computed at 23:14 April 13th of 2017 Pacific time based on 131 observations spanning 36.293 days (2004-Dec-10.06219 to 2005-Jan-15.35504). Diameter approximately 0.029 km. from weighted mean H=25.36.

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 12 December '20

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

1922	Grabbed MPEC 2020-X140 - 2020 XD4 - see above
1921	Noted that NEODyS has removed 2020 SU4 as an impact risk - see above Noted that NEODyS has updated its 2020 WD risk assessment - see above Noted that NEODyS has updated its 2020 WF5 risk assessment - see above Noted that NEODyS has updated its 2020 WT4 risk assessment - see above Noted that NEODyS has updated its 2020 XC risk assessment - see above Noted that NEODyS has updated its 2020 XF risk assessment - see above Noted that NEODyS has updated its 2020 XR risk assessment - see above Noted that NEODyS has removed 2020 XV2 as an impact risk - see above Noted that NEODyS has posted 2020 XX3 as an impact risk - see above Noted that NEODyS has posted 2020 XZ2 as an impact risk - see above
1911	Grabbed MPEC 2020-X139 - 2020 XC4 - see above
1900	Grabbed MPEC 2020-X138 - 2009 XL8 - see above
1803	Noted that JPL Sentry has updated its 2020 XF risk assessment - see above Noted that JPL Sentry has updated its 2020 XR risk assessment - see above
1700	Noted that JPL Sentry has updated its 2004 XG29 risk assessment - see above Noted that JPL Sentry has updated its 2008 VS4 risk assessment - see above Noted that JPL Sentry has updated its 2010 XC risk assessment - see above Noted that JPL Sentry has updated its 2013 XS21 risk assessment - see above Noted that JPL Sentry has updated its 2014 WZ365 risk assessment - see above Noted that JPL Sentry has removed 2020 SU4 as an impact risk - see above Noted that JPL Sentry has updated its 2020 WD risk assessment - see above Noted that JPL Sentry has updated its 2020 WF5 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 XC risk assessment - see above Noted that JPL Sentry has updated its 2020 XF risk assessment - see above Noted that JPL Sentry has removed 2020 XH2 as an impact risk - see above Noted that JPL Sentry has posted 2020 XX3 as an impact risk - see above Noted that JPL Sentry has removed 2020 XZ as an impact risk - see above Grabbed MPEC 2020-X127 - Daily Orbit Update - see above Grabbed MPEC 2020-X128 - 2020 XT3 - see above Grabbed MPEC 2020-X129 - 2020 XU3 - see above Grabbed MPEC 2020-X130 - 2020 XV3 - see above Grabbed MPEC 2020-X131 - 2020 XW3 - see above Grabbed MPEC 2020-X132 - 2020 XX3 - see above Grabbed MPEC 2020-X133 - 2020 XY3 - see above Grabbed MPEC 2020-X134 - 2020 XZ3 - see above Grabbed MPEC 2020-X135 - 2020 XA4 - see above Grabbed MPEC 2020-X136 - 2020 XB4 - see above Grabbed MPEC 2020-X137 - 2016 YU10 - see above
0600	Grabbed MPEC 2020-X122 - 2020 XN3 - see above Grabbed MPEC 2020-X123 - 2020 XP3 - see above Grabbed MPEC 2020-X124 - 2020 XQ3 - see above Grabbed MPEC 2020-X125 - 2020 XR3 - see above Grabbed MPEC 2020-X126 - 2020 XS3 - see above

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