2020-12-06 Tracking News

Contents on 6 December '20

IAU Minor Planet Center
- NEOCP Activity -- 52 listings
- New MPECs -- eleven MPECs
Observers -- 29 observers
Impact Risk Monitoring -- thirteen objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1230 risk-listed objects, 176 have had news in the last 31 days. Updated at 1900 UTC on 6 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 6 December '20

The MPC's NEO Confirmation Page has 52 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 52 objects listed. Of these, 32 were "one nighters." So far The Tracking News has counted a total of 62 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 6 December '20

Minor Planet Electronic Circulars

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

MPEC 2020-X23 time-stamped "04:24 UT" - 2015 XB - see below
MPEC 2020-X24 time-stamped "04:26 UT" - 2020 XJ - see below
MPEC 2020-X25 time-stamped "06:50 UT" - 2003 WJ98 - see below
MPEC 2020-X26 time-stamped "08:40 UT" - 2018 XU3 - see below
MPEC 2020-X27 time-stamped "10:21 UT" - 2020 WV5 - see below
MPEC 2020-X28 time-stamped "10:24 UT" - 2020 XK - see below
MPEC 2020-X29 time-stamped "10:26 UT" - 2020 XL - see below
MPEC 2020-X30 time-stamped "12:14 UT" - Daily Orbit Update - see below
MPEC 2020-X31 time-stamped "19:04 UT" - 2020 XM - see below
MPEC 2020-X32 time-stamped "19:06 UT" - 2020 XN - see below
MPEC 2020-X33 time-stamped "19:07 UT" - 2020 XO

MPEC 2020-X33 - "19:07 UT" - 2020 XO

K20X00O 2020 XO (Earth MOID=4.6 LD, H=23.8 ~59m) was picked up at 1037 UT on 5 Dec. by the Bok Telescope, observing it at Dec. 5.44-46p4. This detection was confirmed by Steward Obs. Mt. Lemmon Station (Dec. 5.51-52p4 & 6.29-30p4), Pan-STARRS 2 (PS2) (Dec. 5.57p1), Squirrel Valley Obs. (Dec. 6.10-13p3), Astronomical Research Obs. Westfield (Dec. 6.21-22p3), ROASTERR-1 (Dec. 6.71-73p3), and Clixby Obs. (Dec. 6.75-76p3).

MPEC 2020-X32 - "19:06 UT" - 2020 XN

K20X00N 2020 XN (Earth MOID=3.7 LD, H=24.5 ~43m) was picked up at 0706 UT on 5 Dec. by the Catalina Sky Survey (CSS), observing it at Dec. 5.30-31p4 and 6.34-35p3. This detection was confirmed by Mountainville Obs. (Dec. 5.34-38p2 & 6.11-18p3), the Mt. Lemmon Survey (MLS) (Dec. 5.35-36p4), the Spacewatch 0.9m telescope (Dec. 5.37-40p3), Steward Mt. Lemmon Sta. (Dec. 5.38p4 & 6.11p4), Squirrel Valley Obs. (Dec. 6.03-04p3), ARO Westfield (Dec. 6.08-09p4), and ROASTERR-1 (Dec. 6.78-79p3).

MPEC 2020-X31 - "19:04 UT" - 2020 XM

K20X00M 2020 XM (small asteroid, H=22.1 ~129m) was picked up at 0809 UT on 5 Dec. by Bok Tel., observing it at Dec. 5.34-35p4 and 6.29-31p4. This detection was confirmed by Pan-STARRS 1 (PS1) (Nov. 10.43-46p3 at G=21.33-22.24), MLS (Nov. 16.39-40p4 at G=21.15-22.47), the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (Dec. 5.41-42p4 & 6.14p4), ARO Westfield (Dec. 6.12p2), and Spacewatch 0.9m (Dec. 6.27-29p3).

<< DOU on 6 December '20 >> MPEC 2020-X30 - "12:14 UT" - Daily Orbit Update

Observations of risk-listed objects
K20X00G 2020 XG (small asteroid, arc=2 days, H=28.1 ~8m, close passer, NHATS target) from Bok Tel. (Dec. 6.31-33p3 & 6.40p3)
K20X00F 2020 XF (small asteroid, arc=2 days, H=26.6 ~16m, close passer, NHATS target) from Great Shefford Obs. (Dec. 5.93-94p4) and ARO Westfield (Dec. 6.05p6)
K20X00C 2020 XC (small asteroid, arc=3 days, H=29.0 ~5m, close passer, NHATS target) from Steward Mt. Lemmon Sta. (Dec. 6.11p4)
K20W03Z 2020 WZ3 (small asteroid, arc=13 days, H=26.1 ~20m, NHATS target) from the Spacewatch 1.8m telescope (Dec. 6.41-43p3 at R=22.1-6)
Observations of recently (no longer) risk-listed objects
K20W05L 2020 WL5 (Q=4.053 AU, arc=8 days, H=21.3 ~186m) from Steward Mt. Lemmon Sta. (Dec. 6.12p4)
K20W02S 2020 WS2 (small asteroid, Q=4.674 AU, arc=16 days, H=24.6 ~41m) from Steward Mt. Lemmon Sta. (Dec. 6.44-45p3)
K20W01Q 2020 WQ1 (small asteroid, arc=22 days, H=22.9 ~89m) from Steward Mt. Lemmon Sta. (Dec. 6.34p3)
K20W00G 2020 WG (arc=20 days, H=21.6 ~162m) from PS1 (Dec. 5.35-37p3) and Steward Mt. Lemmon Sta. (Dec. 6.12p4)
Observations of close-passing objects
K20X00H 2020 XH (arc=2 days, H=24.7 ~39m) from Northolt Branch Obs. (Dec. 5.94-95p4) and ARO Westfield (Dec. 6.25p4)
K20W04Z 2020 WZ4 (arc=19 days, H=24.4 ~45m) from Steward Mt. Lemmon Sta. (Dec. 6.25p4) and MLS (Dec. 6.38-40p3)
K20W02B 2020 WB2 (Q=4.695 AU, arc=17 days, H=23.4 ~71m) from MLS (Dec. 5.42-43p4) and Steward Mt. Lemmon Sta. (Dec. 6.33-36p4)
K20W00P 2020 WP (arc=19 days, H=24.2 ~49m) from Spacewatch 1.8m (Dec. 5.53p2)
K20V06Z 2020 VZ6 (arc=21 days, H=25.0 ~34m) from Spacewatch 1.8m (Dec. 5.51-52p3)
K20O05K 2020 OK5 (arc=146 days, H=25.5 ~27m, NHATS target) from Steward Mt. Lemmon Sta. (Dec. 6.46-48p4)
K17X60Q 2017 XQ60 (arc=3 opp, H=24.4 ~45m) from Spacewatch 1.8m (Dec. 6.36-38p3)
K12UH1K 2012 UK171 (arc=3 opp, H=24.4 ~45m, NHATS target) from Spacewatch 1.8m (Dec. 5.47-49p3)
Observation campaigns (NHATS targets, radar support)
K20W03Q 2020 WQ3 (arc=28 days, H=25.8 ~23m, NHATS) from Spacewatch 1.8m (Dec. 6.39-40p3) and Steward Mt. Lemmon Sta. (Dec. 6.41-44p3)
K20W03K 2020 WK3 (arc=14 days, H=25.1 ~32m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 6.30p4)
K20W03F 2020 WF3 (arc=15 days, H=23.7 ~62m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 6.20p4)
K20W01D 2020 WD1 (arc=20 days, H=23.6 ~65m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 6.23-24p4)
K20W00Y 2020 WY (arc=20 days, H=26.2 ~19m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 6.23-24p4)
K20V05X 2020 VX5 (arc=23 days, H=23.4 ~71m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 6.18p3) and Spacewatch 0.9m (Dec. 6.24-26p3)
K20V02E 2020 VE2 (arc=26 days, H=25.3 ~29m, NHATS) from CSS-Kuiper (Dec. 6.16-18p4 at G=21.43-23.13)
K20V01Y 2020 VY1 (arc=26 days, H=25.9 ~22m, NHATS) from Spacewatch 1.8m (Dec. 6.15-16p3) and Steward Mt. Lemmon Sta. (Dec. 6.25-27p4)
K20V01V 2020 VV1 (arc=30 days, H=25.7 ~25m, NHATS) from ARO Westfield (Dec. 5.25-28p3 at V=22.0-22.3)
K20T08J 2020 TJ8 (arc=53 days, H=25.1 ~32m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 6.41p4)
K20S00O 2020 SO (NHATS) from Steward Mt. Lemmon Sta. (Dec. 6.11-12p4) and Spacewatch 0.9m (Dec. 6.12-14p3)
K20F01T 2020 FT1 (arc=2 opp, H=22.5 ~107m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 6.40p4)
K06R01J 2006 RJ1 (arc=4 opp, H=22.2 ~123m, NHATS) from Spacewatch 0.9m (Dec. 6.17-19p3)
E3404 143404 2003 BD44 (radar) from MLS (Dec. 5.35-37p4)
04179 4179 Toutatis (1989 AC) (radar) from ATLAS Mauna Loa (Dec. 5.20-22p4)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20W05E 2020 WE5 (arc=9 days, H=24.0 ~54m) from Mountainville Obs. (Dec. 5.21-29p3)
K20W04V 2020 WV4 (arc=13 days, H=24.4 ~45m) from Steward Mt. Lemmon Sta. (Dec. 6.38-39p3)
K20W04P 2020 WP4 (arc=13 days, H=22.1 ~129m) from Steward Mt. Lemmon Sta. (Dec. 6.18-20p4)
K20W04E 2020 WE4 (arc=13 days, H=23.5 ~68m) from Steward Mt. Lemmon Sta. (Dec. 6.31-32p4)
K20W03O 2020 WO3 (arc=26 days, H=23.1 ~81m) from Steward Mt. Lemmon Sta. (Dec. 6.21-22p4)
K20W03E 2020 WE3 (arc=15 days, H=25.4 ~28m) from Steward Mt. Lemmon Sta. (Dec. 6.24p4)
K20W03C 2020 WC3 (arc=15 days, H=22.4 ~112m) from Steward Mt. Lemmon Sta. (Dec. 6.31p4)
K20W02U 2020 WU2 (Q=4.750 AU, arc=16 days, H=22.8 ~93m) from CSS-Kuiper (Dec. 6.27p4)
K20W02F 2020 WF2 (Q=4.251 AU, arc=17 days, H=22.1 ~129m) from Steward Mt. Lemmon Sta. (Dec. 6.17p4)
K20W01H 2020 WH1 (arc=22 days, H=24.6 ~41m) from CSS-Kuiper (Dec. 6.22-24p4)
K20V07C 2020 VC7 (arc=31 days, H=23.7 ~62m) from ARO Westfield (Dec. 6.02p4) and ATLAS Mauna Loa (Dec. 6.29-32p4)
K20V06M 2020 VM6 (arc=23 days, H=22.7 ~98m) from CSS-Kuiper (Dec. 6.25-26p4)
K20V06A 2020 VA6 (arc=21 days, H=23.5 ~68m) from CSS-Kuiper (Dec. 5.13-15p2)
K20V04U 2020 VU4 (arc=31 days, H=24.3 ~47m) from Steward Mt. Lemmon Sta. (Dec. 6.32p4)
K20V03Q 2020 VQ3 (arc=26 days, H=22.9 ~89m) from MLS (Dec. 5.31-32p4) and Steward Mt. Lemmon Sta. (Dec. 6.28-29p4)
K20V03E 2020 VE3 (arc=44 days, H=23.3 ~74m) from ARO Westfield (Dec. 5.22-23p3 at V=21.8-22.3) and CSS-Kuiper (Dec. 6.34-36p4 at G=21.42-22.18)
K20V01X 2020 VX1 (arc=26 days, H=22.9 ~89m) from Spacewatch 0.9m (Dec. 6.17-19p3) and Steward Mt. Lemmon Sta. (Dec. 6.27p4)
K20V01K 2020 VK1 (arc=28 days, H=24.0 ~54m) from Steward Mt. Lemmon Sta. (Dec. 6.19-20p4)
K20V00T 2020 VT (arc=32 days, H=25.2 ~31m) from Steward Mt. Lemmon Sta. (Dec. 6.33p4)
K20V00P 2020 VP (arc=32 days, H=24.4 ~45m) from ARO Westfield (Dec. 5.21-23p3 at V=22.1-3)
K20V00E 2020 VE (arc=51 days, H=23.1 ~81m) from Spacewatch 1.8m (Dec. 6.27-28p3) and CSS-Kuiper (Dec. 6.28-29p4 at G=21.42-22.09)
K20U06T 2020 UT6 (arc=58 days, H=23.1 ~81m) from ARO Westfield (Dec. 5.18-19p3 at V=22.0-22.1) and CSS-Kuiper (Dec. 6.31-33p4 at G=21.81-22.29)
K20U05F 2020 UF5 (arc=49 days, H=24.6 ~41m) from CSS-Kuiper (Dec. 6.20-22p4 at G=22.24-23.37)
K20U00D 2020 UD (arc=58 days, H=23.1 ~81m) from Bok Tel. (Dec. 5.27-28p4)
K20T07Q 2020 TQ7 (arc=78 days, H=22.1 ~129m) from Steward Mt. Lemmon Sta. (Dec. 6.46-47p4)
K20T07N 2020 TN7 (arc=53 days, H=23.6 ~65m) from Steward Mt. Lemmon Sta. (Dec. 6.36p3)
K20T03P 2020 TP3 (arc=68 days, H=22.1 ~129m) from CSS-Kuiper (Dec. 6.20-22p4)
K20T03G 2020 TG3 (Q=4.608 AU, arc=61 days, H=22.5 ~107m) from Steward Mt. Lemmon Sta. (Dec. 6.33-34p4)
K20R03X 2020 RX3 (Q=4.399 AU, arc=87 days, H=22.2 ~123m) from CSS-Kuiper (Dec. 6.29-30p4)
K18X03U 2018 XU3 (arc=2 opp, H=25.4 ~28m) from Steward Mt. Lemmon Sta. (Dec. 6.37p4)
K16A65U 2016 AU65 (q=0.355 AU, arc=3 opp, H=22.7 ~98m) from Bok Tel. (Dec. 6.43-44p4)
K03W98J 2003 WJ98 (arc=3 opp, H=22.9 ~89m) from Spacewatch 0.9m (Dec. 6.23-26p3)
K20W02Y 2020 WY2 (arc=16 days, H=21.9 ~141m) from CSS-Kuiper (Dec. 6.26-27p4)
K20W02E 2020 WE2 (arc=25 days, H=21.9 ~141m) from Steward Mt. Lemmon Sta. (Dec. 6.16p4)
K20W01G 2020 WG1 (arc=53 days, H=22.0 ~135m) from CSS-Kuiper (Dec. 6.15p4)
K20T04M 2020 TM4 (Q=4.140 AU, arc=54 days, H=21.8 ~148m) from PS1 (Dec. 5.45-49p3)
K20S01T 2020 ST1 (arc=95 days, H=22.0 ~135m) from Castelmartini Obs. (Nov. 30.09-10p3)
K12L01D 2012 LD1 (arc=3 opp, H=21.9 ~141m) from MLS (Dec. 5.35-37p4)
K09W11D 2009 WD11 (arc=2 opp, H=22.0 ~135m) from CSS (Dec. 5.26-27p2)
Observations of other objects
K20W05S 2020 WS5 (i=40.9°, Q=4.021 AU, arc=9 days, H=21.0 ~214m) from Steward Mt. Lemmon Sta. (Dec. 6.33p3)
K20W05M 2020 WM5 (Q=4.955 AU, arc=8 days, H=21.3 ~186m) from Steward Mt. Lemmon Sta. (Dec. 6.45p4)
K20W05B 2020 WB5 (arc=15 days, H=20.6 ~257m) from CSS-Kuiper (Dec. 5.50-52p4 at G=21.61-22.53)
K20W05A 2020 WA5 (arc=11 days, H=21.5 ~170m) from Steward Mt. Lemmon Sta. (Dec. 6.36-38p4)
K20W04W 2020 WW4 (arc=13 days, H=21.7 ~155m) from Steward Mt. Lemmon Sta. (Dec. 6.30p3)
K20W00W 2020 WW (arc=19 days, H=21.2 ~195m) from ARO Westfield (Dec. 5.08-09p3 at V=22.2-7)
K20V06Q 2020 VQ6 (arc=21 days, H=21.2 ~195m) from MLS (Dec. 5.42-43p4) and Steward Mt. Lemmon Sta. (Dec. 6.19-20p4)
K20V05Z 2020 VZ5 (arc=22 days, H=21.1 ~204m) from Spacewatch 0.9m (Dec. 5.48-50p2) and Steward Mt. Lemmon Sta. (Dec. 6.38p3)
K20V05C 2020 VC5 (i=42.6°, Q=4.252 AU, arc=23 days, H=20.5 ~269m) from CSS-Kuiper (Dec. 6.25p4)
K20V04D 2020 VD4 (i=38.3°, arc=24 days, H=21.4 ~178m) from ARO Westfield (Dec. 5.11-13p3 at V=22.0-22.2)
K20V03M 2020 VM3 (arc=26 days, H=20.9 ~224m) from Steward Mt. Lemmon Sta. (Dec. 6.41-44p4)
K20U06R 2020 UR6 (arc=85 days, H=20.8 ~234m) from Steward Mt. Lemmon Sta. (Dec. 5.54p4)
K20U06J 2020 UJ6 (arc=55 days, H=19.9 ~355m) from Steward Mt. Lemmon Sta. (Dec. 6.45p4 at G=21.21-22.54)
K20U05K 2020 UK5 (arc=80 days, H=20.9 ~224m) from ARO Westfield (Dec. 5.00-01p3 at V=22.4-5), PS1 (Dec. 5.26-31p4), and CSS-Kuiper (Dec. 6.23-24p4 at G=21.57-23.28)
K20U04R 2020 UR4 (Q=4.171 AU, arc=53 days, H=20.2 ~309m) from ARO Westfield (Dec. 5.04-05p3 at V=21.9-22.1)
K20U03U 2020 UU3 (Q=4.968 AU, arc=74 days, H=21.0 ~214m) from MLS (Dec. 5.08-09p3)
K20U01L 2020 UL1 (arc=58 days, H=20.2 ~309m) from Steward Mt. Lemmon Sta. (Dec. 6.15p4)
K20T06N 2020 TN6 (arc=4 opp, H=19.1 ~513m) from ARO Westfield (Dec. 5.16-18p3 at V=22.0-22.2)
K20T05H 2020 TH5 (arc=54 days, H=21.0 ~214m) from Spacewatch 1.8m (Dec. 6.24-26p3) and PS2 (Dec. 6.26-29p3)
K20T04G 2020 TG4 (Q=4.171 AU, arc=77 days, H=20.2 ~309m) from Castelmartini Obs. (Nov. 30.03p3) and MLS (Dec. 5.46-48p4)
K20T01C 2020 TC1 (arc=60 days, H=20.8 ~234m) from CSS-Kuiper (Dec. 6.12-13p4 at G=21.43-22.05)
K20T00X 2020 TX (arc=61 days, H=19.6 ~407m) from CSS-Kuiper (Dec. 6.10-11p4 at G=22.15-23.00)
K20S18K 2020 SK18 (arc=71 days, H=20.4 ~282m) from Steward Mt. Lemmon Sta. (Dec. 6.34p2)
K20R00U 2020 RU (Q=4.833 AU, arc=97 days, H=19.3 ~467m) from the Zwicky Transient Facility (ZTF) (Dec. 5.32-34p2, 5.39p1, 5.45p1 & 5.53p1) and PS1 (Dec. 5.45-47p3)
K20Q07A 2020 QA7 (Q=4.150 AU, arc=100 days, H=20.3 ~295m) from Steward Mt. Lemmon Sta. (Dec. 6.20-22p4)
K20Q06U 2020 QU6 (arc=101 days, H=18.2 ~776m) from Steward Mt. Lemmon Sta. (Dec. 6.15-16p4)
K20Q06Q 2020 QQ6 (Q=4.107 AU, arc=114 days, H=19.8 ~371m) from MLS (Dec. 5.21-22p4)
K20Q06P 2020 QP6 (arc=102 days, H=20.7 ~245m) from CSS-Kuiper (Dec. 6.06-08p4 at G=21.78-22.28)
K20Q04M 2020 QM4 (arc=108 days, H=18.6 ~645m) from PS1 (Dec. 5.41-43p3)
K20P05C 2020 PC5 (Q=4.177 AU, arc=114 days, H=18.5 ~676m) from Steward Mt. Lemmon Sta. (Dec. 6.15-16p4)
K20P04X 2020 PX4 (arc=114 days, H=21.3 ~186m) from ARO Westfield (Dec. 5.00-01p2 at V=22.0-22.1)
K20O08C 2020 OC8 (arc=174 days, H=20.8 ~234m) from Steward Mt. Lemmon Sta. (Dec. 6.27-28p4)
K20O02A 2020 OA2 (arc=161 days, H=21.7 ~155m) from ARO Westfield (Dec. 5.07-09p3 at V=22.1-3)
K20M05E 2020 ME5 (arc=2 opp, H=20.5 ~269m) from Steward Mt. Lemmon Sta. (Dec. 6.20-21p4)
K20L03D 2020 LD3 (arc=173 days, H=20.5 ~269m) from CSS-Kuiper (Dec. 5.54p4)
K20L03B 2020 LB3 (arc=2 opp, H=19.6 ~407m) from MLS (Dec. 5.19-20p4)
K20H06D 2020 HD6 (arc=2 opp, H=19.6 ~407m) from Steward Mt. Lemmon Sta. (Dec. 6.14-15p4)
K18T05S 2018 TS5 (arc=4 opp, H=21.4 ~178m) from MLS (Dec. 5.21-22p4 at G=20.60-22.11)
K18F01Z 2018 FZ1 (arc=2 opp, H=20.9 ~224m) from ARO Westfield (Dec. 5.05-06p2 at V=22.2-4)
K18C02G 2018 CG2 (arc=3 opp, H=19.2 ~490m) from CSS-Kuiper (Dec. 5.52-53p4 at G=21.58-22.01)
K17A05F 2017 AF5 (q=0.124 AU, Q=4.833 AU, arc=4 opp, H=17.7 ~977m) from MLS (Dec. 5.50-51p4)
K16O05P 2016 OP5 (arc=4 opp, H=20.8 ~234m) from PS2 (Dec. 6.27-28p2)
K16N00F 2016 NF (arc=3 opp, H=18.3 ~741m) from PS1 (Dec. 6.22-26p3)
K16L47Y 2016 LY47 (arc=2 opp, H=19.8 ~371m) from Bok Tel. (Dec. 5.36-38p4)
K16E85D 2016 ED85 (Q=5.062 AU, arc=3 opp, H=17.7 ~977m) from MLS (Dec. 5.54-56p4)
K15L21K 2015 LK21 (Q=4.434 AU, arc=3 opp, H=17.6 ~1.02 km) from Spacewatch 0.9m (Dec. 5.48-51p3)
K15B04F 2015 BF4 (arc=6 opp, H=20.5 ~269m) from MLS (Dec. 5.31-33p4)
K13X21Z 2013 XZ21 (arc=3 opp, H=20.4 ~282m) from CSS-Kuiper (Dec. 6.47-48p4)
K13U14X 2013 UX14 (arc=4 opp, H=18.3 ~741m) from Castelmartini Obs. (Nov. 30.02p3)
K13P06Y 2013 PY6 (arc=4 opp, H=19.3 ~467m) from PS2 (Dec. 5.38-42p4)
K12UD6R 2012 UR136 (arc=5 opp, H=19.2 ~490m) from ARO Westfield (Dec. 5.11-12p3 at V=22.6-8)
K11G27O 2011 GO27 (arc=4 opp, H=19.0 ~537m) from MLS (Dec. 5.52-53p4)
K11B59F 2011 BF59 (arc=3 opp, H=19.3 ~467m) from PS1 (Dec. 6.23-27p4)
K10W03F 2010 WF3 (arc=4 opp, H=21.0 ~214m) from MLS (Dec. 5.27-28p4)
K10U07F 2010 UF7 (arc=2 opp, H=19.4 ~446m) from MLS (Dec. 5.52-53p4)
K10OA0L 2010 OL100 (arc=5 opp, H=19.5 ~426m) from Spacewatch 0.9m (Dec. 6.07-08p2)
K09T12K 2009 TK12 (arc=5 opp, H=20.6 ~257m) from PS1 (Dec. 6.24-26p3 at w=21.2-22.3)
K09K08K 2009 KK8 (arc=3 opp, H=18.7 ~616m) from PS1 (Dec. 5.27-30p3)
K09K00K 2009 KK (arc=5 opp, H=20.5 ~269m) from Bok Tel. (Dec. 5.36-38p4 & 6.31-33p4)
K09J01K 2009 JK1 (arc=4 opp, H=19.7 ~389m) from ARO Westfield (Dec. 5.14-16p3 at V=22.0-22.2)
K07VD7X 2007 VX137 (arc=5 opp, H=18.5 ~676m) from MLS (Dec. 5.23-24p4)
K07T18Z 2007 TZ18 (arc=2 opp, H=20.8 ~234m) from PS2 (Dec. 6.26-29p4)
K06H00B 2006 HB (arc=4 opp, H=18.9 ~562m) from ARO Westfield (Dec. 5.03-04p3 at V=22.1-5)
K04U01R 2004 UR1 (arc=4 opp, H=20.5 ~269m) from MLS (Dec. 5.25-27p4)
K04A00C 2004 AC (arc=4 opp, H=18.9 ~562m) from CSS (Dec. 5.41-43p4)
K02T67S 2002 TS67 (arc=6 opp, H=19.1 ~513m) from Castelmartini Obs. (Nov. 30.10-11p3)
K02G08Z 2002 GZ8 (Q=4.633 AU, arc=4 opp, H=18.6 ~645m) from program code 8 via Simeis Obs. (Dec. 4.11-13p8, 5.09-12p4 & 5.16p1)
K00P27Q 2000 PQ27 (arc=3 opp, H=20.0 ~339m) from PS1 (Dec. 5.35-39p3)
J99H01V 1999 HV1 (arc=7 opp, H=17.6 ~1.02 km) from MLS (Dec. 5.37-39p4)
J98W02A 1998 WA2 (Q=4.271 AU, arc=2 opp, H=19.8 ~371m) from PS2 (Dec. 5.39-43p4)
r9940 539940 2017 HW1 from Berthelot Obs. (April 25.89-91p5 & 25.98-05p8)
q5484 525484 2005 GL from MLS (Dec. 5.12-14p4)
p3125 513125 1997 GC32 from Castelmartini Obs. (Nov. 30.07-08p3)
p0190 510190 2011 CX7 from PS1 (Dec. 6.28-31p3)
o5093 505093 2011 VQ5 from ZTF (Dec. 5.30-39p5)
n5511 495511 2014 UD206 from PS2 (Dec. 6.20-24p4)
m6001 486001 2012 MR7 from MLS (Dec. 4.11-12p3)
m2505 482505 2012 TQ78 from CSS (Dec. 5.37-39p4)
m0823 480823 1998 YW5 from MLS (Dec. 5.33-34p3 at G=20.90-22.09)
k5749 465749 2009 WO6 from Castelmartini Obs. (Nov. 30.17p3)
j2307 452307 Manawydan (1997 XV11) from PS2 (Dec. 5.39-43p7)
i3972 443972 2003 TN1 from PS1 (Dec. 6.23-26p4 at w=21.6-22.4)
h5404 435404 2008 AT28 from Castelmartini Obs. (Nov. 30.14p3)
h5302 435302 2007 US6 from PS1 (Dec. 6.22-23p2)
g8086 428086 2006 NM from CSS (Dec. 5.25-27p4)
g0302 420302 2011 XZ1 from MLS (Dec. 5.19-20p4)
f5027 415027 2011 SG5 from PS1 (Dec. 5.21-24p3)
f4960 414960 2011 CS4 from MLS (Dec. 5.10-12p3) and PS1 (Dec. 5.23-25p3)
f3002 413002 1999 VG22 from PS2 (Dec. 6.21-24p4)
c0929 380929 2006 HU30 from PS2 (Dec. 5.34-36p3) and PS1 (Dec. 5.41-43p3)
c0359 380359 2002 TN30 from CSS (Dec. 5.41-43p4)
c0321 380321 2002 HF8 from Bok Tel. (Dec. 5.38-39p3)
b3579 373579 2002 AW11 from PS2 (Dec. 5.44-48p4)
Z1331 351331 2004 XH29 from MLS (Dec. 5.26p2 at G=21.71-22.01)
Y5705 345705 2006 VB14 from ZTF (Dec. 5.12-14p4)
V9988 319988 2007 DK from MLS (Dec. 5.17-18p4)
V5020 315020 2007 BG49 from PS2 (Dec. 6.23-25p3 at w=22.0-22.1)
U3262 303262 2004 RJ84 from MLS (Dec. 5.10-12p4), ZTF (Dec. 5.11-13p4), and PS1 (Dec. 5.22-25p3)
S3729 283729 2002 UX from Castelmartini Obs. (Nov. 30.13-14p3)
R5714 275714 2000 YH4 from W.F. Cashwell via Slooh.com Chile Obs. (Dec. 5.07-11p3)
R5611 275611 1999 XX262 from MLS (Dec. 5.50-51p4)
Q2623 262623 2006 WY2 from MLS (Dec. 5.52-53p4)
O1596 241596 1998 XM2 from Castelmartini Obs. (Nov. 30.08-09p3)
N7551 237551 2000 WQ19 from MLS (Dec. 5.14-16p4)
K2435 202435 2005 XH8 from MLS (Dec. 5.45-47p4)
J9145 199145 2005 YY128 from Bok Tel. (Dec. 5.52-54p4)
J4126 194126 2001 SG276 from Spacewatch 0.9m (Dec. 5.18-21p3)
G3692 163692 2003 CY18 from PS2 (Dec. 6.26-29p4)
G3364 163364 2002 OD20 from CSS (Dec. 5.25-27p4)
G2173 162173 Ryugu (1999 JU3) from Hirao Obs. (Dec. 5.39-40p3)
G2039 162039 1996 JG from Castelmartini Obs. (Nov. 30.16-17p3)
F9402 159402 1999 AP10 from Kuban State Univ. Obs. (Dec. 4.80-96p103)
F4330 154330 2002 VX94 from CSS (Dec. 5.25-27p4)
F3306 153306 2001 JL1 from MLS (Dec. 5.19-20p4)
F3220 153220 2000 YN29 from Bok Tel. (Dec. 5.40-42p4)
F3201 153201 2000 WO107 from Althuraya Astronomy Ctr. (Nov. 29.79-80p2)
F2978 152978 2000 GJ147 from ZTF (Dec. 5.19p2 & 5.26-27p2) and CSS (Dec. 5.23-25p4)
E5656 145656 4788 P-L from PS1 (Dec. 5.26-31p4)
E4411 144411 2004 EW9 from CSS (Dec. 5.23-25p4)
E3624 143624 2003 HM16 from PS1 (Dec. 6.28-32p4)
E0158 140158 2001 SX169 from PS1 (Dec. 5.27-30p3)
D8947 138947 2001 BA40 from Castelmartini Obs. (Nov. 30.11p2)
D8852 138852 2000 WN10 from MLS (Dec. 5.23-24p4)
96744 96744 1999 OW3 from PS1 (Dec. 5.27-30p3)
89355 89355 2001 VS78 from Castelmartini Obs. (Nov. 30.18p3)
88188 88188 2000 XH44 from ZTF (Dec. 5.30p1, 5.36-39p2, 5.44p1 & 5.53p1) and Golden Ears Obs. (Dec. 6.31p2)
85628 85628 1998 KV2 from Berthelot Obs. (April 25.91p1 & 25.95-98p5)
68359 68359 2001 OZ13 from ZTF (Dec. 5.19p2, 5.24-28p2 & 5.35p1)
66272 66272 1999 JW6 from Castelmartini Obs. (Nov. 29.99-00p3) and CSS (Dec. 5.28-29p4)
53435 53435 1999 VM40 from Golden Ears Obs. (Dec. 6.30p3)
36284 36284 2000 DM8 from CSS (Dec. 5.06-08p4)
27002 27002 1998 DV9 from PS2 (Dec. 6.26-29p4)
23183 23183 2000 OY21 from MLS (Dec. 5.52-53p4)
21374 21374 1997 WS22 from ZTF (Dec. 1.43p1, 1.47p1, 5.37p1 & 5.45p1)
20460 20460 Robwhiteley (1999 LO28) from ZTF (Dec. 1.12p2 & 5.12-14p3)
19764 19764 2000 NF5 from PS2 (Dec. 5.26-29p4)
17182 17182 1999 VU from PS2 (Dec. 6.21-25p4)
16834 16834 1997 WU22 from CSS (Dec. 5.25-27p4)
10115 10115 1992 SK from CSS (Dec. 5.19-21p4), PS1 (Dec. 5.35-43p7), and PS2 (Dec. 5.36-37p2)
08037 8037 1993 HO1 from MLS (Dec. 5.50-51p4)
08014 8014 1990 MF from CSS (Dec. 5.28-29p3) and MLS (Dec. 5.35-36p4)
07025 7025 1993 QA from SATINO-1 (Aug. 20.97-99p3)
06455 6455 1992 HE from PS1 (Dec. 5.58-59p2)
05836 5836 1993 MF from CSS (Dec. 5.32-34p4)
05131 5131 1990 BG from MLS (Dec. 5.50-51p4)
04947 4947 Ninkasi (1988 TJ1) from PS2 (Dec. 5.21-25p3)
04688 4688 1980 WF from PS2 (Dec. 5.26-29p4 & 6.20-23p3)
04486 4486 Mithra (1987 SB) from MLS (Dec. 5.27-29p4)
03908 3908 Nyx (1980 PA) from PS1 (Dec. 6.23-26p3)
03691 3691 Bede (1982 FT) from PS1 (Dec. 6.23-26p4)
03288 3288 Seleucus (1982 DV) from PS1 (Dec. 6.23-26p3)
02212 2212 Hephaistos (1978 SB) from CSS (Dec. 5.21-23p4) and MLS (Dec. 5.27-28p4)
01981 1981 Midas (1973 EA) from ATLAS Mauna Loa (Dec. 5.21-22p3)
01943 1943 Anteros (1973 EC) from IAS Obs. Hakos (Dec. 3.06-08p2)
01862 1862 Apollo (1932 HA) from MLS (Dec. 5.50-51p4)

MPEC 2020-X29 - "10:26 UT" - 2020 XL

K20X00L 2020 XL (small asteroid, H=23.76 ~60m) was picked up at 0630 UT on 4 Dec. by MLS, observing it at Dec. 4.27-29p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 4.38p3), ARO Westfield (Dec. 5.08-09p2), and CSS-Kuiper (Dec. 5.13-14p4 & 6.13-14p4).

MPEC 2020-X28 - "10:24 UT" - 2020 XK

K20X00K 2020 XK (small asteroid, H=25.14 ~32m) was picked up at 0931 UT on 4 Dec. by MLS, observing it at Dec. 4.40-41p3 and 4.48p3. This detection was confirmed by PS2 (Dec. 4.50-52p3), Steward Mt. Lemmon Sta. (Dec. 5.14p4 & 6.19p4), Spacewatch 0.9m (Dec. 5.37-39p2), and ARO Westfield (Dec. 6.14p3).

MPEC 2020-X27 - "10:21 UT" - 2020 WV5

K20W05V 2020 WV5 (H=20.09 ~325m) was picked up at 1007 UT on 22 Nov. by MLS, observing it at Nov. 22.42-44p4. This detection was confirmed by Bok Tel. (Dec. 5.44-46p4), CSS-Kuiper (Dec. 5.52-53p4), ARO Westfield (Dec. 6.22-24p3), Steward Mt. Lemmon Sta. (Dec. 6.28-29p4), and Spacewatch 1.8m (Dec. 6.29-30p3).

MPEC 2020-X26 - "08:40 UT" - 2018 XU3

K18X03U 2018 XU3 (small asteroid, H=25.5 ~27m) from PS1 (Dec. 2.52p1), PS2 (Dec. 5.43p1), and MLS (Dec. 6.31-33p4)

MPEC 2020-X25 - "06:50 UT" - 2003 WJ98

K03W98J 2003 WJ98 (small asteroid, H=22.9 ~89m) from PS1 (2014 April 8.55-57p2 at G=22.41-81, 2014 May 8.38-40p2 at G=21.87-22.37 & 2014 May 10.38-41p3 at G=22.25-23.00), MLS (Dec. 6.15-16p4), and Steward Mt. Lemmon Sta. (Dec. 6.25-26p4)

MPEC 2020-X24 - "04:26 UT" - 2020 XJ

K20X00J 2020 XJ (small asteroid, H=25.2 ~31m) was picked up at 0733 UT on 4 Dec. by MLS, observing it at Dec. 4.31-33p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 4.40-41p3, 5.10p4 & 6.13p3), ARO Westfield (Dec. 5.05-06p3), Sandlot Obs. (Dec. 5.19-27p5), and Squirrel Valley Obs. (Dec. 6.06-08p3).

MPEC 2020-X23 - "04:24 UT" - 2015 XB

K15X00B 2015 XB (small asteroid, H=24.1 ~51m) from MLS (Dec. 3.19-20p4 & 5.17-18p4), CSS-Kuiper (Dec. 5.27p4), ARO Westfield (Dec. 6.03-04p3), and Steward Mt. Lemmon Sta. (Dec. 6.09-10p4)

Observers on 6 December '20

A total of 29 observers appear in today's MPECs.

Code	Observer / observatory
`M46`	Althuraya Astronomy Ctr., 1 in MPEC 2020-X30 -- 153201
`H21`	Astronomical Research Obs. Westfield in Illinois, 26 in MPECs 2020-X23, 2020-X24, 2020-X27, 2020-X28, 2020-X29, 2020-X30, 2020-X31, 2020-X32 & 2020-X33 -- 2020 XO, 2020 XN, 2020 XM, 2020 XL, 2020 XK, 2020 XJ, 2020 XH, 2020 XF, 2020 WW, 2020 WV5, 2020 VV1, 2020 VP, 2020 VE3, 2020 VD4, 2020 VC7, 2020 UT6, 2020 UR4, 2020 UK5, 2020 TN6, 2020 PX4, 2020 OA2, 2018 FZ1, 2015 XB, 2012 UR136, 2009 JK1, 2006 HB
`T08`	ATLAS Mauna Loa in Hawaii, 3 in MPEC 2020-X30 -- 2020 VC7, 4179, 1981
`L54`	Berthelot Obs., 2 in MPEC 2020-X30 -- 85628, 539940
`V00`	Bok Telescope in Arizona, 11 in MPECs 2020-X27, 2020-X30, 2020-X31 & 2020-X33 -- 2020 XO, 2020 XM, 2020 XG, 2020 WV5, 2020 UD, 2016 LY47, 2016 AU65, 2009 KK, 380321, 199145, 153220
`160`	Castelmartini Obs. in Italy, 13 in MPEC 2020-X30 -- 2020 TG4, 2020 ST1, 2013 UX14, 2002 TS67, 89355, 66272, 513125, 465749, 435404, 283729, 241596, 162039, 138947
`703`	Catalina Sky Survey (CSS) in Arizona, 17 in MPECs 2020-X30 & 2020-X32 -- 2020 XN, 2009 WD11, 2004 AC, 66272, 482505, 428086, 380359, 36284, 16834, 163364, 154330, 152978, 144411, 10115, 8014, 5836, 2212
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 26 in MPECs 2020-X23, 2020-X27, 2020-X29, 2020-X30 & 2020-X31 -- 2020 XM, 2020 XL, 2020 WY2, 2020 WV5, 2020 WU2, 2020 WH1, 2020 WG1, 2020 WB5, 2020 VM6, 2020 VE3, 2020 VE2, 2020 VE, 2020 VC5, 2020 VA6, 2020 UT6, 2020 UK5, 2020 UF5, 2020 TX, 2020 TP3, 2020 TC1, 2020 RX3, 2020 QP6, 2020 LD3, 2018 CG2, 2015 XB, 2013 XZ21
`Z99`	Clixby Obs. in England, 1 in MPEC 2020-X33 -- 2020 XO
`U55`	Golden Ears Obs., 2 in MPEC 2020-X30 -- 88188, 53435
`J95`	Great Shefford Obs. in England, 1 in MPEC 2020-X30 -- 2020 XF
`P87`	Hirao Obs., 1 in MPEC 2020-X30 -- 162173
`221`	IAS Obs. Hakos in Namibia, 1 in MPEC 2020-X30 -- 1943
`C40`	Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-X30 -- 159402
`V01`	Mountainville Obs. in Utah, 2 in MPECs 2020-X30 & 2020-X32 -- 2020 XN, 2020 WE5
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 50 in MPECs 2020-X23, 2020-X24, 2020-X25, 2020-X26, 2020-X27, 2020-X28, 2020-X29, 2020-X30, 2020-X31 & 2020-X32 -- 2020 XN, 2020 XM, 2020 XL, 2020 XK, 2020 XJ, 2020 WZ4, 2020 WV5, 2020 WB2, 2020 VQ6, 2020 VQ3, 2020 UU3, 2020 TG4, 2020 QQ6, 2020 LB3, 2018 XU3, 2018 TS5, 2017 AF5, 2016 ED85, 2015 XB, 2015 BF4, 2012 LD1, 2011 GO27, 2010 WF3, 2010 UF7, 2007 VX137, 2004 UR1, 2003 WJ98, 1999 HV1, 525484, 486001, 480823, 420302, 414960, 351331, 319988, 303262, 275611, 262623, 237551, 23183, 202435, 153306, 143404, 138852, 8037, 8014, 5131, 4486, 2212, 1862
`Z80`	Northolt Branch Obs. in England, 1 in MPEC 2020-X30 -- 2020 XH
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 29 in MPECs 2020-X25, 2020-X26, 2020-X30 & 2020-X31 -- 2020 XM, 2020 WG, 2020 UK5, 2020 TM4, 2020 RU, 2020 QM4, 2018 XU3, 2016 NF, 2011 BF59, 2009 TK12, 2009 KK8, 2003 WJ98, 2000 PQ27, 96744, 510190, 443972, 435302, 415027, 414960, 380929, 303262, 145656, 143624, 140158, 10115, 6455, 3908, 3691, 3288
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 21 in MPECs 2020-X26, 2020-X28, 2020-X30 & 2020-X33 -- 2020 XO, 2020 XK, 2020 TH5, 2018 XU3, 2016 OP5, 2013 PY6, 2007 TZ18, 1998 WA2, 495511, 452307, 413002, 380929, 373579, 315020, 27002, 19764, 17182, 163692, 10115, 4947, 4688
`L04`	ROASTERR-1 in Romania, 2 in MPECs 2020-X32 & 2020-X33 -- 2020 XO, 2020 XN
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2020-X24 -- 2020 XJ
`C95`	SATINO-1 in France, 1 in MPEC 2020-X30 -- 7025
`0948`	program code 8 via Simeis Obs. in Ukraine, 1 in MPEC 2020-X30 -- 2002 GZ8
`W88!`	W.F. Cashwell in Nevada via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-X30 -- 275714
`691`	Spacewatch 0.9m telescope in Arizona, 12 in MPECs 2020-X28, 2020-X30, 2020-X31 & 2020-X32 -- 2020 XN, 2020 XM, 2020 XK, 2020 VZ5, 2020 VX5, 2020 VX1, 2020 SO, 2015 LK21, 2010 OL100, 2006 RJ1, 2003 WJ98, 194126
`291`	Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2020-X27 & 2020-X30 -- 2020 WZ3, 2020 WV5, 2020 WQ3, 2020 WP, 2020 VZ6, 2020 VY1, 2020 VE, 2020 TH5, 2017 XQ60, 2012 UK171
`W34`	Squirrel Valley Obs. in North Carolina, 3 in MPECs 2020-X24, 2020-X32 & 2020-X33 -- 2020 XO, 2020 XN, 2020 XJ
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 60 in MPECs 2020-X23, 2020-X24, 2020-X25, 2020-X27, 2020-X28, 2020-X29, 2020-X30, 2020-X32 & 2020-X33 -- 2020 XO, 2020 XN, 2020 XL, 2020 XK, 2020 XJ, 2020 XC, 2020 WZ4, 2020 WY, 2020 WW4, 2020 WV5, 2020 WV4, 2020 WS5, 2020 WS2, 2020 WQ3, 2020 WQ1, 2020 WP4, 2020 WO3, 2020 WM5, 2020 WL5, 2020 WK3, 2020 WG, 2020 WF3, 2020 WF2, 2020 WE4, 2020 WE3, 2020 WE2, 2020 WD1, 2020 WC3, 2020 WB2, 2020 WA5, 2020 VZ5, 2020 VY1, 2020 VX5, 2020 VX1, 2020 VU4, 2020 VT, 2020 VQ6, 2020 VQ3, 2020 VM3, 2020 VK1, 2020 UR6, 2020 UL1, 2020 UJ6, 2020 TQ7, 2020 TN7, 2020 TJ8, 2020 TG3, 2020 SO, 2020 SK18, 2020 QU6, 2020 QA7, 2020 PC5, 2020 OK5, 2020 OC8, 2020 ME5, 2020 HD6, 2020 FT1, 2018 XU3, 2015 XB, 2003 WJ98
`I41`	Zwicky Transient Facility (ZTF) in southern California, 9 in MPEC 2020-X30 -- 2020 RU, 88188, 68359, 505093, 345705, 303262, 21374, 20460, 152978

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

Impact Risk Monitoring on 6 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 XG	NEODyS	1900	2081-2120	142	7.55e-05	-5.89	-6.6	n/a	NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2020-12-04.338 to 2020-12-06.399."
2020 XG	JPL Sentry	1735	2081-2120	66	8.83781358e-05	-5.81	-6.39	0	JPL: Computed at 06:23 today Pacific time based on 21 observations spanning 2.0612 days (2020-Dec-04.336897 to 2020-Dec-06.3981). Diameter approximately 0.008 km. from weighted mean H=28.09.

2020 XF	NEODyS	1900	2056-2120	606	7.13e-04	-4.19	-4.48	n/a	NEODyS: "Based on 40 optical observations (of which 0 are rejected as outliers) from 2020-12-04.328 to 2020-12-06.051."
2020 XF	JPL Sentry	1735	2056-2119	135	0.000368628446	-4.51	-5.14	0	JPL: Computed at 06:26 today Pacific time based on 40 observations spanning 1.7236 days (2020-Dec-04.32683 to 2020-Dec-06.050446). Diameter approximately 0.016 km. from weighted mean H=26.65.

2020 XE	NEODyS	1900	2040-2063	5	7.39e-06	-4.89	-4.9	0	NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2020-12-04.398 to 2020-12-05.296."

2020 XC	NEODyS	1900	2075-2094	3	5.49e-07	-8.55	-8.56	0	NEODyS: "Based on 35 optical observations (of which 0 are rejected as outliers) from 2020-12-03.363 to 2020-12-06.114."
2020 XC	JPL Sentry	1735	2075-2085	2	5.68e-07	-8.51	-8.57	0	JPL: Computed at 06:26 today Pacific time based on 35 observations spanning 2.7505 days (2020-Dec-03.36221 to 2020-Dec-06.112705). Diameter approximately 0.005 km. from weighted mean H=29.01.

2020 WG5	NEODyS	1900	2086-2120	33	2.65e-04	-5.20	-5.31	n/a	NEODyS: "Based on 46 optical observations (of which 1 are rejected as outliers) from 2020-11-27.253 to 2020-12-05.278."

2020 WF5	NEODyS	1900	2082-2118	35	1.03e-05	-6.59	-7.35	0	NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2020-11-27.232 to 2020-12-05.445."

2020 WT4	NEODyS	1900	2068-2119	12	6.96e-06	-6.86	-7.12	0	NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2020-11-24.191 to 2020-12-05.120."

2020 WZ3	NEODyS	1900	2101-2119	11	8.45e-06	-6.05	-6.47	0	NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2020-11-23.353 to 2020-12-06.426."
2020 WZ3	JPL Sentry	1735	2089-2119	13	1.2555e-05	-5.88	-6.36	0	JPL: Computed at 06:08 today Pacific time based on 41 observations spanning 13.073 days (2020-Nov-23.352624 to 2020-Dec-06.42517). Diameter approximately 0.020 km. from weighted mean H=26.19.

2017 WF30	JPL Sentry	1735	2020-2119	967	2.0071548e-06	-6.00	-6.96	0	JPL: Computed at 13:42 Dec. 18th of 2019 Pacific time based on 8 observations spanning .17008 days (2017-Nov-28.27313 to 2017-Nov-28.44321). Diameter approximately 0.018 km. from weighted mean H=26.38.

2010 XQ	JPL Sentry	1735	2021-2116	69	2.06259e-07	-6.61	-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	1735	2020-2115	247	4.3315282e-06	-5.65	-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=26.34.

2005 XA8	JPL Sentry	1735	2063-2086	21	3.58134692e-05	-4.78	-5.22	0	JPL: Computed at 19:21 April 14th of 2017 Pacific time based on 61 observations spanning 17.964 days (2005-Dec-06.31929 to 2005-Dec-24.28292). Diameter approximately 0.025 km. from weighted mean H=25.64.

2005 TM173	JPL Sentry	1735	2021-2116	146	9.395122e-07	-5.34	-6.23	0	JPL: Computed at 08:06 April 8th of 2017 Pacific time based on 6 observations spanning 1.9467 days (2005-Oct-09.20072 to 2005-Oct-11.14743). 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 6 December '20

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

2036	Grabbed MPEC 2020-X31 - 2020 XM - see above Grabbed MPEC 2020-X32 - 2020 XN - see above Grabbed MPEC 2020-X33 - 2020 XO - see above
1900	Noted that NEODyS has updated its 2020 WF5 risk assessment - see above Noted that NEODyS has updated its 2020 WG5 risk assessment - see above Noted that NEODyS has updated its 2020 WT4 risk assessment - see above Noted that NEODyS has updated its 2020 WZ3 risk assessment - see above Noted that NEODyS has posted 2020 XC as an impact risk - see above Noted that NEODyS has posted 2020 XE as an impact risk - see above Noted that NEODyS has posted 2020 XF as an impact risk - see above Noted that NEODyS has posted 2020 XG as an impact risk - see above
1735	Noted that JPL Sentry has updated its 2005 TM173 risk assessment - see above Noted that JPL Sentry has updated its 2005 XA8 risk assessment - see above 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 2017 WF30 risk assessment - see above Noted that JPL Sentry has updated its 2020 WZ3 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 updated its 2020 XG risk assessment - see above Grabbed MPEC 2020-X25 - 2003 WJ98 - see above Grabbed MPEC 2020-X26 - 2018 XU3 - see above Grabbed MPEC 2020-X27 - 2020 WV5 - see above Grabbed MPEC 2020-X28 - 2020 XK - see above Grabbed MPEC 2020-X29 - 2020 XL - see above Grabbed MPEC 2020-X30 - Daily Orbit Update - see above
0530	Grabbed MPEC 2020-X23 - 2015 XB - see above Grabbed MPEC 2020-X24 - 2020 XJ - see above

http://www.HohmannTransfer.com/mn/20/20341_1206.htm
Publisher information, privacy statement, and disclaimer.
This page is © Copyright 2020 Columbine of Maine - All Rights Reserved
Any mentioned trademarks are the property of their respective owners.
Various tabular formats and data used on this page are acknowledged as belonging to JPL, MPC, NEODyS, and/or others.
Do NOT copy, mirror, or embed this page, but you are welcome to link to it, and you may embed the RSS news feed. All information here is subject to very frequent change during the day of news compilation. Individuals may make copies for their own private, non-commercial use. Please report broken links or other problems with this page to <webmaster@hohmanntransfer.com>.