2020-12-11 Tracking News

Contents on 11 December '20

IAU Minor Planet Center
- NEOCP Activity -- 89 listings
- New MPECs -- seventeen MPECs
Observers -- 30 observers
Impact Risk Monitoring -- eleven objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1231 risk-listed objects, 147 have had news in the last 31 days. Updated at 1802 UTC on 11 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 11 December '20

The MPC's NEO Confirmation Page has 89 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 89 objects listed. Of these, 54 were "one nighters." So far The Tracking News has counted a total of 116 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 11 December '20

Minor Planet Electronic Circulars

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

MPEC 2020-X105 time-stamped "04:34 UT" - 2020 XY2 - see below
MPEC 2020-X106 time-stamped "12:20 UT" - Daily Orbit Update - see below
MPEC 2020-X107 time-stamped "15:00 UT" - 2018 CK14 - see below
MPEC 2020-X108 time-stamped "16:24 UT" - 2020 VD7 - see below
MPEC 2020-X109 time-stamped "16:26 UT" - 2020 XZ2 - see below
MPEC 2020-X110 time-stamped "16:27 UT" - 2020 XA3 - see below
MPEC 2020-X111 time-stamped "16:28 UT" - 2020 XB3 - see below
MPEC 2020-X112 time-stamped "16:30 UT" - 2020 XC3 - see below
MPEC 2020-X113 time-stamped "16:31 UT" - 2020 XD3 - see below
MPEC 2020-X114 time-stamped "16:32 UT" - 2020 XE3 - see below
MPEC 2020-X115 time-stamped "16:34 UT" - 2020 XF3 - see below
MPEC 2020-X116 time-stamped "16:36 UT" - 2020 XG3 - see below
MPEC 2020-X117 time-stamped "18:58 UT" - 2020 XH3 - see below
MPEC 2020-X118 time-stamped "18:59 UT" - 2020 XJ3 - see below
MPEC 2020-X119 time-stamped "19:02 UT" - 2020 XK3 - see below
MPEC 2020-X120 time-stamped "19:05 UT" - 2020 XL3 - see below
MPEC 2020-X121 time-stamped "20:37 UT" - 2020 XM3

MPEC 2020-X121 - "20:37 UT" - 2020 XM3

K20X03M 2020 XM3 (small asteroid, H=22.7 ~98m) was picked up at 0927 UT on 10 Dec. by Pan-STARRS 2 (PS2), observing it at Dec. 10.39-43p4 and 11.37-39p3. This detection was confirmed by the Mt. Lemmon Survey (MLS) (Dec. 6.43-44p4), Astronomical Research Obs. Westfield (Dec. 11.19-20p2), and Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Dec. 11.21p3).

MPEC 2020-X120 - "19:05 UT" - 2020 XL3

K20X03L 2020 XL3 (Earth MOID=3.7 LD, H=21.2 ~195m) was picked up at 1048 UT on 9 Dec. by the Catalina Sky Survey (CSS), observing it at Dec. 9.45-47p4. This detection was confirmed by Steward Obs. Mt. Lemmon Station (Dec. 9.52-55p6), Xingming Obs. #3 (Dec. 9.82p4), Visnjan Obs. (Dec. 9.95p3), ARO Westfield (Dec. 10.36-37p5 & 11.34-35p3), Sandlot Obs. (Dec. 10.43-44p3), ATLAS Mauna Loa (Dec. 10.57-58p4), and program code "!" (10) via ESA Optical Ground Station (ESA OGS) (Dec. 11.22-23p3).

MPEC 2020-X119 - "19:02 UT" - 2020 XK3

K20X03K 2020 XK3 (borderline-small, i=57.8°, H=21.9 ~141m) was picked up at 0928 UT on 9 Dec. by PS2, observing it at Dec. 9.40-43p4. This detection was confirmed by Visnjan Obs. (Dec. 9.80-81p4, 9.99p3 & 11.75-76p4), ARO Westfield (Dec. 10.11p3), Xingming Obs. #3 (Dec. 10.62p5), Squirrel Valley Obs. (Dec. 11.03-06p3), and program code 1 via Schwarzschild Obs. (Dec. 11.72p2).

MPEC 2020-X118 - "18:59 UT" - 2020 XJ3

K20X03J 2020 XJ3 (Earth MOID=4.0 LD, H=25.4 ~28m) was picked up at 1415 UT on 9 Dec. by Pan-STARRS 1 (PS1), observing it at Dec. 9.59-63p4. This detection was confirmed by Visnjan Obs. (Dec. 10.06-07p5), ARO Westfield (Dec. 10.39p2), Sandlot Obs. (Dec. 10.45-47p3), and program code 2 via ESA Optical Ground Station (ESA OGS) (Dec. 11.23p3).

MPEC 2020-X117 - "18:58 UT" - 2020 XH3

K20X03H 2020 XH3 (H=20.5 ~269m) was picked up at 0745 UT on 9 Dec. by PS1, observing it at Dec. 9.32-36p4 and 10.37-41p4. This detection was confirmed by ARO Westfield (Dec. 10.03-04p4), Farpoint Obs. (Dec. 10.07-09p3), Dave Balam via Plaskett 1.8m Telescope (Dec. 10.11-12p5), Tebbutt Obs. (Dec. 10.13-14p3), Visnjan Obs. (Dec. 10.97p4), Schwarzschild Obs./code 1 (Dec. 11.74p2), and Paus Obs. (Dec. 11.76-77p2).

MPEC 2020-X116 - "16:36 UT" - 2020 XG3

K20X03G 2020 XG3 (small asteroid, H=24.9 ~35m) was picked up at 0951 UT on 9 Dec. by the Bok Telescope, observing it at Dec. 9.41-43p8. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 9.49-50p3), ARO Westfield (Dec. 10.17-18p3 & 11.29-30p2), and Tebbutt Obs. (Dec. 10.23-25p2).

MPEC 2020-X115 - "16:34 UT" - 2020 XF3

K20X03F 2020 XF3 (small asteroid, H=25.1 ~32m) was picked up at 0731 UT on 9 Dec. by MLS, observing it at Dec. 9.31-33p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 9.42-43p2), Mt. John Obs. (Dec. 9.58-59p4 & 10.57-58p3), Visnjan Obs. (Dec. 10.01p3), and ARO Westfield (Dec. 11.25-26p3).

MPEC 2020-X114 - "16:32 UT" - 2020 XE3

K20X03E 2020 XE3 (risk listed, Q=4.278 AU, Earth MOID=0.9 LD, H=24.8 ~37m) was picked up at 0608 UT on 8 Dec. by PS1, observing it at Dec. 8.26-29p3. This detection was confirmed by MLS (Dec. 6.28-29p2), Steward Mt. Lemmon Sta. (Dec. 9.13-14p3), Tebbutt Obs. (Dec. 10.20p2), and ESA OGS/code 2 (Dec. 10.87-89p3).

MPEC 2020-X113 - "16:31 UT" - 2020 XD3

K20X03D 2020 XD3 (small asteroid, H=25.4 ~28m) was picked up at 0455 UT on 9 Dec. by MLS, observing it at Dec. 9.21-22p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 9.29-30p4), Mt. John Obs. (Dec. 9.55-56p4), Holmes/CTIO (Dec. 10.07-08p3), PS1 (Dec. 10.32-35p3), and ARO Westfield (Dec. 11.12-13p4).

MPEC 2020-X112 - "16:30 UT" - 2020 XC3

K20X03C 2020 XC3 (small asteroid, H=22.4 ~112m) was picked up at 0229 UT on 9 Dec. by MLS, observing it at Dec. 9.10-12p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 9.20p4), Mt. John Obs. (Dec. 9.48p2), Holmes/CTIO (Dec. 10.06p3), PS2 (Dec. 10.22-25p4), Xingming Obs. #3 (Dec. 10.62p2), Squirrel Valley Obs. (Dec. 10.99-01p3), and ARO Westfield (Dec. 11.05p3).

MPEC 2020-X111 - "16:28 UT" - 2020 XB3

K20X03B 2020 XB3 (Earth MOID=1.4 LD, H=27.5 ~11m) was picked up at 0527 UT on 9 Dec. by MLS, observing it at Dec. 9.23-24p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 9.32p3), Mt. John Obs. (Dec. 9.56-57p6 & 10.53p4), program code 4 via ESA Optical Ground Station (ESA OGS) (Dec. 10.96p3), Visnjan Obs. (Dec. 10.98p5), and ARO Westfield (Dec. 11.24-25p4).

MPEC 2020-X110 - "16:27 UT" - 2020 XA3

K20X03A 2020 XA3 (small asteroid, Earth MOID=2.0 LD, H=24.4 ~45m) was picked up at 0845 UT on 8 Dec. by PS1, observing it at Dec. 8.36-39p3. This detection was confirmed by Holmes/CTIO (Dec. 9.15p2 & 11.13-14p3), Steward Mt. Lemmon Sta. (Dec. 9.24-25p2), ARO Westfield (Dec. 10.12-13p4), and ESA OGS/code 4 (Dec. 10.86-87p3).

MPEC 2020-X109 - "16:26 UT" - 2020 XZ2

K20X02Z 2020 XZ2 (risk listed, Earth MOID=0.5 LD, H=22.3 ~117m) was picked up at 0809 UT on 7 Dec. by PS1, observing it at Dec. 7.34-38p3 and 11.36-39p4. This detection was confirmed by Holmes/CTIO (Dec. 9.16-17p3, 10.10-11p3 & 11.16-17p3), ESA OGS/code 4 (Dec. 10.90-91p3), and ARO Westfield (Dec. 11.21p2 at V=22.0-22.2).

MPEC 2020-X108 - "16:24 UT" - 2020 VD7

K20V07D 2020 VD7 (H=21.0 ~214m) was picked up at 1041 UT on 11 Nov. by MLS, observing it at Nov. 11.45-46p4 and 23.48-49p3. This detection was confirmed by Bok Tel. (Dec. 9.48-50p4), Steward Mt. Lemmon Sta. (Dec. 9.54-55p3), Visnjan Obs. (Dec. 10.04-05p3), and ARO Westfield (Dec. 10.20-21p2 & 11.31-33p3).

MPEC 2020-X107 - "15:00 UT" - 2018 CK14

K18C14K 2018 CK14 (H=19.4 ~446m) from Holmes/CTIO (Dec. 9.20-23p3 at G=22.6-9 & 10.24-27p3 at G=22.7-23.0)

<< DOU on 11 December '20 >> MPEC 2020-X106 - "12:20 UT" - Daily Orbit Update

Observations of risk-listed objects
K20X02H 2020 XH2 (small asteroid, arc=2 days, H=27.0 ~13m, close passer, NHATS target) from Holmes/CTIO (Dec. 10.22p3)
K20X00E 2020 XE (small asteroid, Q=4.470 AU, arc=6 days, H=26.2 ~19m, close passer) from UH/Tholen NEO Follow-Up 2.24m Telescope (Dec. 10.48p1 at G=22.57)
K20W03Z 2020 WZ3 (small asteroid, arc=17 days, H=26.2 ~19m, NHATS target) from ARO Westfield (Dec. 6.22p3 at V=22.2-3) and Tholen 2.24m (Dec. 10.47-48p2 at G=22.75-81)
K20U00J 2020 UJ (small asteroid, arc=13 days, H=24.2 ~49m) from MLS (Oct. 9.22-23p2 at G=21.9-22.3)
Observations of recently (no longer) risk-listed objects
K20X01G 2020 XG1 (almost small, i=50.5°, arc=5 days, H=21.8 ~148m) from ATLAS Mauna Loa (Dec. 10.43-45p4)
K20W01Q 2020 WQ1 (small asteroid, arc=26 days, H=22.9 ~89m) from Holmes/CTIO (Dec. 10.28-29p3)
Observations of close-passing objects
K20X01H 2020 XH1 (arc=5 days, H=22.8 ~93m) from Holmes/CTIO (Dec. 10.20-21p6), ATLAS Haleakala (Dec. 10.42-46p4), ATLAS Mauna Loa (Dec. 10.44-46p4), and Foxfire Village Obs. (Dec. 11.07p3)
K20W05W 2020 WW5 (arc=20 days, H=28.6 ~6m, NHATS target) from PS1 (Dec. 10.48-50p3)
K20W04Z 2020 WZ4 (arc=23 days, H=24.4 ~45m) from Holmes/CTIO (Dec. 10.19-20p3)
K20W03A 2020 WA3 (arc=19 days, H=26.6 ~16m, NHATS target) from ARO Westfield (Dec. 10.23-24p3 at V=22.3)
K20W02B 2020 WB2 (Q=4.696 AU, arc=18 days, H=23.4 ~71m) from Castelmartini Obs. (Nov. 23.14-15p3)
K15XG9Y 2015 XY169 (arc=2 opp, H=25.5 ~27m, NHATS target) from ATLAS Mauna Loa (Dec. 10.50p1, 10.55p1 & 10.61p1)
o1647 501647 2014 SD224 from LCO Tenerife Aqawan A#1 (Dec. 10.18-26p4)
D6617 136617 1994 CC from PS2 (Dec. 10.45-47p3)
Observation campaigns (NHATS targets, radar support)
K20X02T 2020 XT2 (arc=15 days, H=24.9 ~35m, NHATS) from MLS (Nov. 25.21-23p4)
K20X02O 2020 XO2 (arc=2 days, H=24.7 ~39m, NHATS) from PS2 (Dec. 10.36-38p2 at w=19.62-22.63) and ATLAS Haleakala (Dec. 10.41-46p4)
K20W03K 2020 WK3 (arc=18 days, H=25.0 ~34m, NHATS) from Holmes/CTIO (Dec. 10.30-31p3)
K20W03F 2020 WF3 (arc=19 days, H=23.7 ~62m, NHATS) from PS2 (Dec. 10.30-34p3)
K20S00O 2020 SO (NHATS) from ATLAS Haleakala (Dec. 11.29-31p4)
K19X00S 2019 XS (arc=5 opp, H=23.7 ~62m, NHATS) from PS1 (Dec. 10.38-42p4)
K13Y02S 2013 YS2 (arc=2 opp, H=23.5 ~68m, NHATS) from ATLAS Mauna Loa (Dec. 10.42-45p5)
K11G60D 2011 GD60 (arc=4 opp, H=21.8 ~148m, NHATS) from the Zwicky Transient Facility (ZTF) (Dec. 10.19p1, 10.25-28p2 & 10.37-38p2) and ATLAS Haleakala (Dec. 10.45-48p6)
K06R01J 2006 RJ1 (arc=4 opp, H=22.2 ~123m, NHATS) from PS2 (Dec. 10.26-29p4)
E3404 143404 2003 BD44 (radar) from PS1 (Dec. 10.27-31p4)
11398 11398 1998 YP11 (radar) from ZTF (Dec. 10.19-21p2, 10.26p1 & 10.32p1)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20X02S 2020 XS2 (Q=4.172 AU, arc=6 days, H=24.9 ~35m) from PS1 (Dec. 10.26-29p3 & 11.22-26p4)
K20X02Q 2020 XQ2 (i=42.0°, arc=3 days, H=22.7 ~98m) from ZTF (Dec. 11.28-30p4)
K20X02K 2020 XK2 (arc=3 days, H=23.2 ~78m) from Holmes/CTIO (Dec. 10.14-16p3) and PS1 (Dec. 10.33-36p4 at w=21.9-22.3)
K20X00U 2020 XU (arc=5 days, H=23.0 ~85m) from ATLAS Mauna Loa (Dec. 10.43-45p4)
K20X00M 2020 XM (arc=30 days, H=22.1 ~129m) from PS1 (Dec. 10.27-29p2)
K20W05T 2020 WT5 (arc=10 days, H=22.2 ~123m) from Holmes/CTIO (Dec. 10.11-13p3)
K20W04N 2020 WN4 (arc=28 days, H=22.5 ~107m) from PS2 (Dec. 10.55-58p7)
K20W04E 2020 WE4 (arc=17 days, H=23.5 ~68m) from Holmes/CTIO (Dec. 10.24-25p3)
K20W03E 2020 WE3 (arc=19 days, H=25.3 ~29m) from Holmes/CTIO (Dec. 10.22-23p3)
K20W02U 2020 WU2 (Q=4.699 AU, arc=20 days, H=22.8 ~93m) from Holmes/CTIO (Dec. 10.16-18p3) and PS1 (Dec. 10.33-36p4 at w=21.5-22.1)
K20W01N 2020 WN1 (arc=4 days, H=26.1 ~20m) from ARO Westfield (Nov. 18.30-31p3)
K20W00K 2020 WK (arc=29 days, H=25.6 ~26m) from ARO Westfield (Dec. 10.25-26p2 at V=22.2-4)
K20V07C 2020 VC7 (arc=36 days, H=23.9 ~56m) from Foxfire Village Obs. (Dec. 11.04p3)
K20V02B 2020 VB2 (arc=30 days, H=23.0 ~85m) from Holmes/CTIO (Dec. 10.20-22p3 at G=21.9-22.2)
K20V01X 2020 VX1 (arc=30 days, H=22.9 ~89m) from Holmes/CTIO (Dec. 10.18-19p3)
K20V01U 2020 VU1 (arc=35 days, H=25.6 ~26m) from PS1 (Dec. 10.44-48p4 at w=22.04-33)
K20U02J 2020 UJ2 (Q=4.033 AU, arc=54 days, H=23.7 ~62m) from ARO Westfield (Dec. 10.34-36p3 at V=22.2-5)
K20T07N 2020 TN7 (arc=57 days, H=23.6 ~65m) from PS2 (Dec. 10.48-53p3)
K20T03G 2020 TG3 (Q=4.608 AU, arc=65 days, H=22.5 ~107m) from Castelmartini Obs. (Nov. 23.09-10p3) and Holmes/CTIO (Dec. 10.27p3)
K20R04S 2020 RS4 (arc=91 days, H=23.7 ~62m) from Holmes/CTIO (Dec. 10.34p2 at G=22.2)
K18S02B 2018 SB2 (q=0.367 AU, arc=15 days, H=24.2 ~49m) from CSS (2018 Sept. 18.39p1)
K18S01P 2018 SP1 (arc=22 days, H=23.1 ~81m) from MLS (2018 Sept. 12.31-32p3 at G=20.5-22.1)
K17W14G 2017 WG14 (q=0.317 AU, arc=20 days, H=24.5 ~43m) from CSS (2017 Nov. 17.23-24p3)
K16T54R 2016 TR54 (arc=5 opp, H=22.1 ~129m) from PS1 (Dec. 10.33-36p3)
K16L09D 2016 LD9 (arc=2 opp, H=22.4 ~112m) from Balam/Plaskett (Dec. 10.18p4) and PS1 (Dec. 11.22-25p4)
K05W00Z 2005 WZ (arc=2 opp, H=22.9 ~89m) from ARO Westfield (Dec. 10.31-33p3 at V=22.1-2)
K20S01T 2020 ST1 (arc=105 days, H=22.0 ~135m) from Castelmartini Obs. (Nov. 23.17p3) and Holmes/CTIO (Dec. 10.31-32p3)
Observations of other objects
K20X02R 2020 XR2 (arc=17 days, H=21.3 ~186m) from PS1 (Dec. 10.28-31p3)
K20X01N 2020 XN1 (i=36.8°, Q=4.009 AU, arc=22 days, H=19.8 ~371m) from Holmes/CTIO (Dec. 10.23-24p3) and ATLAS Mauna Loa (Dec. 10.45-47p6)
K20X00S 2020 XS (i=51.4°, arc=6 days, H=21.2 ~195m) from Holmes/CTIO (Dec. 10.12-13p3)
K20W06A 2020 WA6 (arc=2 opp, H=20.0 ~339m) from PS2 (Dec. 11.31-35p4)
K20W05S 2020 WS5 (i=40.8°, Q=4.013 AU, arc=13 days, H=20.9 ~224m) from Holmes/CTIO (Dec. 10.25p3) and ATLAS Haleakala (Dec. 10.42-43p4)
K20W04J 2020 WJ4 (arc=26 days, H=20.9 ~224m) from ZTF (Dec. 10.40-49p4)
K20W01M 2020 WM1 (arc=23 days, H=21.3 ~186m) from Holmes/CTIO (Dec. 10.27-28p3)
K20W01L 2020 WL1 (arc=24 days, H=19.9 ~355m) from Holmes/CTIO (Dec. 10.34-35p3)
K20V06Q 2020 VQ6 (arc=25 days, H=21.2 ~195m) from ZTF (Dec. 10.26p2 & 10.32p2) and PS2 (Dec. 10.31-34p3)
K20U07G 2020 UG7 (arc=2 opp, H=19.3 ~467m) from PS1 (Dec. 11.21-25p4)
K20U04R 2020 UR4 (Q=4.171 AU, arc=58 days, H=20.2 ~309m) from ARO Westfield (Dec. 10.05-07p3 at V=21.7-22.1)
K20U01V 2020 UV1 (arc=55 days, H=20.1 ~323m) from PS1 (Dec. 10.43-47p4)
K20T07C 2020 TC7 (arc=57 days, H=19.6 ~407m) from Holmes/CTIO (Dec. 10.09-10p3)
K20T04G 2020 TG4 (Q=4.171 AU, arc=82 days, H=20.1 ~323m) from Castelmartini Obs. (Nov. 23.10-11p3) and ATLAS Mauna Loa (Dec. 10.46-48p4)
K20S03F 2020 SF3 (Q=4.371 AU, arc=91 days, H=21.5 ~170m) from PS1 (Dec. 10.27-31p4)
K20R00U 2020 RU (Q=4.833 AU, arc=102 days, H=19.2 ~490m) from ZTF (Dec. 10.27p1, 10.35-36p2 & 10.51p2)
K20Q07A 2020 QA7 (Q=4.150 AU, arc=104 days, H=20.2 ~309m) from PS2 (Dec. 10.30-35p4)
K20P01B 2020 PB1 (arc=133 days, H=21.0 ~214m) from ARO Westfield (Dec. 10.39-40p3 at V=22.1-3)
K20K03N 2020 KN3 (Q=5.237 AU, arc=2 opp, H=19.6 ~407m) from ARO Westfield (Dec. 10.31-33p3 at V=22.1-3)
K20A00K 2020 AK (arc=2 opp, H=19.2 ~490m) from ARO Westfield (Oct. 8.13-14p3 at V=22.0-22.2)
K18C13V 2018 CV13 (arc=3 opp, H=21.0 ~214m) from PS1 (Dec. 10.53-57p4)
K18B01J 2018 BJ1 from MLS (2018 Jan. 14.34-35p3)
K17W29C 2017 WC29 (arc=3 opp, H=17.9 ~891m) from ARO Westfield (Dec. 10.30-32p3 at V=22.1-2)
K16O05P 2016 OP5 (arc=4 opp, H=20.9 ~224m) from Foxfire Village Obs. (Dec. 11.02-03p3)
K16L47Y 2016 LY47 (arc=2 opp, H=19.8 ~371m) from PS1 (Dec. 10.27-31p4)
K16J34N 2016 JN34 (i=45.2°, arc=3 opp, H=20.4 ~282m) from PS1 (Dec. 10.38-42p4)
K16GL6U 2016 GU216 (Q=4.225 AU, arc=4 opp, H=18.6 ~645m) from PS1 (Dec. 10.38-40p3 at w=22.4-6)
K15XQ1J 2015 XJ261 (arc=4 opp, H=19.5 ~426m) from PS1 (Dec. 10.54-57p3)
K14UB6R 2014 UR116 (arc=6 opp, H=19.8 ~371m) from PS1 (Dec. 11.21-25p4)
K14HI7M 2014 HM187 (arc=5 opp, H=21.4 ~178m) from PS2 (Dec. 10.31-33p3)
K13U14X 2013 UX14 (arc=4 opp, H=18.3 ~741m) from Castelmartini Obs. (Nov. 23.13-14p3)
K13P06Y 2013 PY6 (arc=4 opp, H=19.3 ~467m) from Blue Mountains Obs. (Dec. 7.58-61p3)
K13M05X 2013 MX5 (arc=3 opp, H=18.9 ~562m) from PS1 (Dec. 11.21-25p4 at w=21.7-22.1)
K12S22A 2012 SA22 (arc=3 opp, H=18.1 ~812m) from ATLAS Mauna Loa (Dec. 10.44-48p3)
K12H33Z 2012 HZ33 (arc=3 opp, H=20.4 ~282m) from PS2 (Dec. 10.49-52p3)
K11Q09G 2011 QG9 (Q=4.358 AU, arc=3 opp, H=20.5 ~269m) from ZTF (Dec. 10.31-32p2, 10.39p1 & 10.51p1)
K11B00A 2011 BA (arc=5 opp, H=20.0 ~339m) from ARO Westfield (Dec. 10.26-28p3 at V=22.0-22.2)
K10VJ8U 2010 VU198 (arc=3 opp, H=18.6 ~645m) from PS1 (Dec. 10.44-47p3)
K09K00K 2009 KK (arc=5 opp, H=20.5 ~269m) from PS1 (Dec. 10.27-31p4)
K07Y58Z 2007 YZ58 (arc=6 opp, H=19.6 ~407m) from PS1 (Dec. 10.33-37p3 at w=21.9-22.2)
K07W03V 2007 WV3 (arc=3 opp, H=19.8 ~371m) from PS1 (Dec. 10.59-63p4)
K07F03K 2007 FK3 (arc=3 opp, H=19.0 ~537m) from PS2 (Dec. 10.59-63p4)
K04L03U 2004 LU3 (arc=5 opp, H=18.4 ~708m) from PS1 (Dec. 10.33-36p4)
K03Y00J 2003 YJ (arc=4 opp, H=20.3 ~295m) from ATLAS Haleakala (Dec. 10.40-45p4)
K03B47K 2003 BK47 (Q=4.689 AU, arc=5 opp, H=17.8 ~933m) from ATLAS Haleakala (Dec. 10.57-58p4)
K02T67S 2002 TS67 (arc=6 opp, H=19.1 ~513m) from Castelmartini Obs. (Nov. 23.18-19p2) and ATLAS Mauna Loa (Dec. 10.49-50p3)
J99V15X 1999 VX15 (Q=4.807 AU, arc=2 opp, H=18.8 ~589m) from ATLAS Haleakala (Dec. 10.42-44p4 & 10.50p1)
J99H01V 1999 HV1 (arc=7 opp, H=17.5 ~1.07 km) from ZTF (Dec. 6.26-29p3 & 6.37p1) and PS1 (Dec. 10.48-52p7)
r7467 537467 2015 ME54 from PS1 (Dec. 10.33-36p3 at w=22.0-22.2)
r0938 530938 2011 XE from ATLAS Haleakala (Dec. 10.31-33p4)
p3125 513125 1997 GC32 from Castelmartini Obs. (Nov. 23.17-18p3)
p1777 511777 2015 EZ from PS1 (Dec. 10.32-36p6)
o6779 506779 2006 YY2 from ATLAS Haleakala (Dec. 10.42-44p4)
o5093 505093 2011 VQ5 from ZTF (Dec. 6.29-34p5 & 6.39p1)
m0934 480934 2003 LX5 from PS1 (Dec. 10.26-30p4 at w=21.9-22.3 & 11.22-25p4 at w=21.9-22.2)
m0824 480824 1999 JO6 from ZTF (Dec. 10.21-22p2, 10.26p1 & 10.32p1)
l4554 474554 2003 YQ94 from Foxfire Village Obs. (Dec. 11.01-06p3)
k5749 465749 2009 WO6 from Castelmartini Obs. (Nov. 23.22p3)
j2307 452307 Manawydan (1997 XV11) from Castelmartini Obs. (Nov. 23.08p3)
j0263 450263 2003 WD158 from ATLAS Haleakala (Dec. 10.41-45p4)
g4532 424532 2008 EZ97 from PS1 (Dec. 10.27-30p3 at w=22.7-9)
f6694 416694 2004 YR32 from ATLAS Mauna Loa (Dec. 10.52-53p4)
f4903 414903 2010 XT45 from ZTF (Dec. 6.16p1, 6.22-25p2 & 6.38p1)
f3192 413192 2002 VY94 from ZTF (Dec. 9.55p1 & 10.55-57p5)
d5207 395207 2010 HQ80 from PS1 (Dec. 10.33-36p3)
c0359 380359 2002 TN30 from ZTF (Dec. 6.46-49p2, 6.54p1, 10.39p1, 10.44p1 & 10.51p1)
c0321 380321 2002 HF8 from PS1 (Dec. 10.28-32p3)
c0128 380128 1997 WB21 from ZTF (Dec. 10.35-36p2 & 10.50p2)
b3579 373579 2002 AW11 from ATLAS Haleakala (Dec. 10.42-46p4)
X7084 337084 1998 SE36 from PS1 (Dec. 10.53-57p4)
S3729 283729 2002 UX from Castelmartini Obs. (Nov. 23.21p2) and ATLAS Mauna Loa (Dec. 10.50p3)
R5714 275714 2000 YH4 from ATLAS Haleakala (Dec. 10.32-34p4)
O1662 241662 2000 KO44 from ATLAS Haleakala (Dec. 10.50-51p4)
O1596 241596 1998 XM2 from Castelmartini Obs. (Nov. 23.19-20p2) and ATLAS Haleakala (Dec. 10.44-46p4)
I9040 189040 2000 MU1 from PS1 (Dec. 10.55-57p3)
I6822 186822 2004 FE31 from ATLAS Haleakala (Dec. 10.34-36p4)
I5716 185716 1998 SF35 from MASTER OAFA Obs. (Dec. 10.08p1 & 10.17p1)
G3364 163364 2002 OD20 from PS1 (Dec. 11.21-25p4)
G2781 162781 2000 XL44 from ZTF (Dec. 10.46-48p2 & 10.54p2)
G2210 162210 1999 SM5 from PS1 (Dec. 11.21-25p4 at w=21.8-22.1)
F9856 159856 2004 JW6 from PS1 (Dec. 10.33-36p4)
F9402 159402 1999 AP10 from ZTF (Dec. 6.46-49p6) and program code 1 via Kuban State Univ. Obs. (Dec. 10.84-86p3 & 10.93-95p3)
F5340 155340 2006 SK198 from ZTF (Dec. 9.55p1 & 10.55-56p4)
F4302 154302 2002 UQ3 from ATLAS Haleakala (Dec. 10.28-30p4)
F3201 153201 2000 WO107 from Squirrel Valley Obs. (Dec. 11.08-09p3) and PS1 (Dec. 11.22-26p3)
E3649 143649 2003 QQ47 from ZTF (Dec. 9.55p1 & 10.55-57p4)
D8947 138947 2001 BA40 from ATLAS Mauna Loa (Dec. 10.48-50p3)
D8095 138095 2000 DK79 from ATLAS Haleakala (Dec. 10.23-25p4)
D7052 137052 Tjelvar (1998 VO33) from ZTF (Dec. 10.56-57p4)
D6635 136635 1994 VA1 from PS2 (Dec. 10.60-63p3)
B2221 112221 2002 KH4 from PS1 (Dec. 11.21-24p4)
88188 88188 2000 XH44 from ZTF (Dec. 6.24p1, 6.30p1, 6.49p1, 10.27p1 & 10.35-39p2) and PS2 (Dec. 10.50-53p3)
87684 87684 2000 SY2 from ATLAS Haleakala (Dec. 10.28-30p4)
85275 85275 1994 LY from ATLAS Haleakala (Dec. 10.36-38p4)
66272 66272 1999 JW6 from Castelmartini Obs. (Nov. 23.11-12p3)
65717 65717 1993 BX3 from ATLAS Haleakala (Dec. 10.34-36p4)
55532 55532 2001 WG2 from ATLAS Haleakala (Dec. 10.39-41p4)
53435 53435 1999 VM40 from Kuban State Univ. Obs./code 1 (Dec. 10.74-84p46)
36183 36183 1999 TX16 from ATLAS Haleakala (Dec. 10.22-23p3)
35107 35107 1991 VH from ATLAS Haleakala (Dec. 10.23-25p4)
31669 31669 1999 JT6 from ZTF (Dec. 9.55-57p6 & 10.55-57p5)
22753 22753 1998 WT from PS2 (Dec. 10.44-48p4)
12538 12538 1998 OH from ATLAS Haleakala (Dec. 10.51-52p4)
11405 11405 1999 CV3 from ATLAS Haleakala (Dec. 10.23-25p4)
09058 9058 1992 JB from SATINO-1 (Oct. 17.86-87p2)
08566 8566 1996 EN from ATLAS Haleakala (Dec. 10.24-27p4)
08014 8014 1990 MF from PS1 (Dec. 10.27-31p3)
07977 7977 1977 QQ5 from ATLAS Haleakala (Dec. 10.19-22p4)
05863 5863 Tara (1983 RB) from ZTF (Dec. 10.25-28p2 & 10.37-38p2)
05836 5836 1993 MF from ZTF (Dec. 6.27p1, 6.40p1, 10.26p2 & 10.32p1) and PS2 (Dec. 10.31-35p4)
05587 5587 1990 SB from PS1 (Dec. 10.33-37p4) and ATLAS Haleakala (Dec. 10.37-39p4)
04953 4953 1990 MU from ATLAS Haleakala (Dec. 10.26-28p4)
04055 4055 Magellan (1985 DO2) from ATLAS Haleakala (Dec. 10.35-38p8)
01980 1980 Tezcatlipoca (1950 LA) from ATLAS Haleakala (Dec. 10.61-64p4)
01943 1943 Anteros (1973 EC) from ATLAS Haleakala (Dec. 10.64-66p4)
01685 1685 Toro (1948 OA) from ATLAS Haleakala (Dec. 10.63-66p4)
01036 1036 Ganymed (1924 TD) from ATLAS Haleakala (Dec. 10.50-52p4)
00887 887 Alinda (1918 DB) from ATLAS Haleakala (Dec. 10.27-29p4)

MPEC 2020-X105 - "04:34 UT" - 2020 XY2

K20X02Y 2020 XY2 (small asteroid, H=23.2 ~78m) was picked up at 0840 UT on 8 Dec. by PS1, observing it at Nov. 19.42-44p3 and Dec. 8.36-38p3. This detection was confirmed by PS2 (Nov. 14.37-40p4), MLS (Nov. 17.32-33p4 at G=21.9-22.3 & Dec. 6.32-33p3 at G=21.5-22.2), Holmes/CTIO (Dec. 9.09-11p3 at V=21.6-22.2), Farpoint Obs. (Dec. 10.22-25p3 at G=21.4-22.1), and ARO Westfield (Dec. 11.14p2 at V=22.1-2).

Observers on 11 December '20

A total of 30 observers appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 26 in MPECs 2020-X105, 2020-X106, 2020-X108, 2020-X109, 2020-X110, 2020-X111, 2020-X112, 2020-X113, 2020-X115, 2020-X116, 2020-X117, 2020-X118, 2020-X119, 2020-X120 & 2020-X121 -- 2020 XZ2, 2020 XY2, 2020 XM3, 2020 XL3, 2020 XK3, 2020 XJ3, 2020 XH3, 2020 XG3, 2020 XF3, 2020 XD3, 2020 XC3, 2020 XB3, 2020 XA3, 2020 WZ3, 2020 WN1, 2020 WK, 2020 WA3, 2020 VD7, 2020 UR4, 2020 UJ2, 2020 PB1, 2020 KN3, 2020 AK, 2017 WC29, 2011 BA, 2005 WZ
`T05`	ATLAS Haleakala in Hawaii, 36 in MPEC 2020-X106 -- 2020 XO2, 2020 XH1, 2020 WS5, 2020 SO, 2011 GD60, 2003 YJ, 2003 BK47, 1999 VX15, 87684, 85275, 65717, 55532, 530938, 506779, 450263, 373579, 36183, 35107, 275714, 241662, 241596, 186822, 154302, 138095, 12538, 11405, 8566, 7977, 5587, 4953, 4055, 1980, 1943, 1685, 1036, 887
`T08`	ATLAS Mauna Loa in Hawaii, 13 in MPECs 2020-X106 & 2020-X120 -- 2020 XU, 2020 XN1, 2020 XL3, 2020 XH1, 2020 XG1, 2020 TG4, 2015 XY169, 2013 YS2, 2012 SA22, 2002 TS67, 416694, 283729, 138947
`Q68`	Blue Mountains Obs. in New South Wales, 1 in MPEC 2020-X106 -- 2013 PY6
`V00`	Bok Telescope in Arizona, 2 in MPECs 2020-X108 & 2020-X116 -- 2020 XG3, 2020 VD7
`160`	Castelmartini Obs. in Italy, 12 in MPEC 2020-X106 -- 2020 WB2, 2020 TG4, 2020 TG3, 2020 ST1, 2013 UX14, 2002 TS67, 66272, 513125, 465749, 452307, 283729, 241596
`703`	Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2020-X106 & 2020-X120 -- 2020 XL3, 2018 SB2, 2017 WG14
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 28 in MPECs 2020-X105, 2020-X106, 2020-X107, 2020-X109, 2020-X110, 2020-X112, 2020-X113 & 2020-X121 -- 2020 XZ2, 2020 XY2, 2020 XS, 2020 XN1, 2020 XM3, 2020 XK2, 2020 XH2, 2020 XH1, 2020 XD3, 2020 XC3, 2020 XA3, 2020 WZ4, 2020 WU2, 2020 WT5, 2020 WS5, 2020 WQ1, 2020 WM1, 2020 WL1, 2020 WK3, 2020 WE4, 2020 WE3, 2020 VX1, 2020 VB2, 2020 TG3, 2020 TC7, 2020 ST1, 2020 RS4, 2018 CK14
`J04!`	program code "!" (10) via ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2020-X120 -- 2020 XL3
`J042`	program code 2 via ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2020-X114 & 2020-X118 -- 2020 XJ3, 2020 XE3
`J044`	program code 4 via ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPECs 2020-X109, 2020-X110 & 2020-X111 -- 2020 XZ2, 2020 XB3, 2020 XA3
`734`	Farpoint Obs. in Kansas, 2 in MPECs 2020-X105 & 2020-X117 -- 2020 XY2, 2020 XH3
`W46`	Foxfire Village Obs., 4 in MPEC 2020-X106 -- 2020 XH1, 2020 VC7, 2016 OP5, 474554
`C401`	program code 1 via Kuban State Univ. Obs. in Russia, 2 in MPEC 2020-X106 -- 53435, 159402
`Z21`	LCO Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2020-X106 -- 501647
`W92`	MASTER OAFA Obs., 1 in MPEC 2020-X106 -- 185716
`474`	Mt. John Obs. in New Zealand, 4 in MPECs 2020-X111, 2020-X112, 2020-X113 & 2020-X115 -- 2020 XF3, 2020 XD3, 2020 XC3, 2020 XB3
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2020-X105, 2020-X106, 2020-X108, 2020-X111, 2020-X112, 2020-X113, 2020-X114, 2020-X115 & 2020-X121 -- 2020 XY2, 2020 XT2, 2020 XM3, 2020 XF3, 2020 XE3, 2020 XD3, 2020 XC3, 2020 XB3, 2020 VD7, 2020 UJ, 2018 SP1, 2018 BJ1
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 49 in MPECs 2020-X105, 2020-X106, 2020-X109, 2020-X110, 2020-X113, 2020-X114, 2020-X117 & 2020-X118 -- 2020 XZ2, 2020 XY2, 2020 XS2, 2020 XR2, 2020 XM, 2020 XK2, 2020 XJ3, 2020 XH3, 2020 XE3, 2020 XD3, 2020 XA3, 2020 WW5, 2020 WU2, 2020 VU1, 2020 UV1, 2020 UG7, 2020 SF3, 2019 XS, 2018 CV13, 2016 TR54, 2016 LY47, 2016 LD9, 2016 JN34, 2016 GU216, 2015 XJ261, 2014 UR116, 2013 MX5, 2010 VU198, 2009 KK, 2007 YZ58, 2007 WV3, 2004 LU3, 1999 HV1, 537467, 511777, 480934, 424532, 395207, 380321, 337084, 189040, 163364, 162210, 159856, 153201, 143404, 112221, 8014, 5587
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 20 in MPECs 2020-X105, 2020-X106, 2020-X112, 2020-X119 & 2020-X121 -- 2020 XY2, 2020 XO2, 2020 XM3, 2020 XK3, 2020 XC3, 2020 WN4, 2020 WF3, 2020 WA6, 2020 VQ6, 2020 TN7, 2020 QA7, 2014 HM187, 2012 HZ33, 2007 FK3, 2006 RJ1, 88188, 22753, 136635, 136617, 5836
`B49`	Paus Obs. in Spain, 1 in MPEC 2020-X117 -- 2020 XH3
`6581`	Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPECs 2020-X106 & 2020-X117 -- 2020 XH3, 2016 LD9
`H36`	Sandlot Obs. in Kansas, 2 in MPECs 2020-X118 & 2020-X120 -- 2020 XL3, 2020 XJ3
`C95`	SATINO-1 in France, 1 in MPEC 2020-X106 -- 9058
`0331`	program code 1 via Schwarzschild Obs. in Germany, 2 in MPECs 2020-X117 & 2020-X119 -- 2020 XK3, 2020 XH3
`W34`	Squirrel Valley Obs. in North Carolina, 3 in MPECs 2020-X106, 2020-X112 & 2020-X119 -- 2020 XK3, 2020 XC3, 153201
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 9 in MPECs 2020-X108, 2020-X110, 2020-X111, 2020-X112, 2020-X113, 2020-X114, 2020-X115, 2020-X116 & 2020-X120 -- 2020 XL3, 2020 XG3, 2020 XF3, 2020 XE3, 2020 XD3, 2020 XC3, 2020 XB3, 2020 XA3, 2020 VD7
`858`	Tebbutt Obs. in New Mexico, 3 in MPECs 2020-X114, 2020-X116 & 2020-X117 -- 2020 XH3, 2020 XG3, 2020 XE3
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2020-X106 -- 2020 XE, 2020 WZ3
`L01`	Visnjan Obs. in Croatia, 7 in MPECs 2020-X108, 2020-X111, 2020-X115, 2020-X117, 2020-X118, 2020-X119 & 2020-X120 -- 2020 XL3, 2020 XK3, 2020 XJ3, 2020 XH3, 2020 XF3, 2020 XB3, 2020 VD7
`N88`	Xingming Obs. #3, 3 in MPECs 2020-X112, 2020-X119 & 2020-X120 -- 2020 XL3, 2020 XK3, 2020 XC3
`I41`	Zwicky Transient Facility (ZTF) in southern California, 23 in MPEC 2020-X106 -- 2020 XQ2, 2020 WJ4, 2020 VQ6, 2020 RU, 2011 QG9, 2011 GD60, 1999 HV1, 88188, 505093, 480824, 414903, 413192, 380359, 380128, 31669, 162781, 159402, 155340, 143649, 137052, 11398, 5863, 5836

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

Impact Risk Monitoring on 11 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 XE3	JPL Sentry	1730	2097-2097	1	9.381e-09	-8.20	-8.20	0	JPL: Computed at 09:27 today Pacific time based on 12 observations spanning 4.6037 days (2020-Dec-06.28728 to 2020-Dec-10.891026). Diameter approximately 0.037 km. from weighted mean H=24.79.

2020 XZ2	JPL Sentry	1800	2039-2069	16	6.89839e-08	-5.66	-5.85	0	JPL: Computed at 09:30 today Pacific time based on 21 observations spanning 4.0542 days (2020-Dec-07.340176 to 2020-Dec-11.394359). Diameter approximately 0.106 km. from weighted mean H=22.54.

2020 XV2	NEODyS	1730	2070-2089	2	4.53e-10	-8.86	-8.99	0	NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2020-12-09.313 to 2020-12-10.565."

2020 XH2	NEODyS	1730	R E M O V E D						-
2020 XH2	JPL Sentry	1730	2113-2113	1	4.630e-08	-8.74	-8.74	0	JPL: Computed at 06:09 today Pacific time based on 17 observations spanning 1.8646 days (2020-Dec-08.356953 to 2020-Dec-10.22151). Diameter approximately 0.013 km. from weighted mean H=27.00.

2020 XE	JPL Sentry	1730	2040-2040	2	8.24957e-06	-4.94	-4.95	0	JPL: Computed at 06:21 today Pacific time based on 49 observations spanning 6.0862 days (2020-Dec-04.397182 to 2020-Dec-10.483382). Diameter approximately 0.019 km. from weighted mean H=26.25.
2020 XE	NEODyS	1730	2040-2075	5	1.26e-05	-4.76	-4.76	0	NEODyS: "Based on 49 optical observations (of which 0 are rejected as outliers) from 2020-12-04.398 to 2020-12-10.484."

2020 WZ3	JPL Sentry	1730	2088-2120	16	2.57989e-05	-5.57	-6.15	0	JPL: Computed at 06:09 today Pacific time based on 51 observations spanning 17.126 days (2020-Nov-23.352624 to 2020-Dec-10.479077). Diameter approximately 0.019 km. from weighted mean H=26.21.
2020 WZ3	NEODyS	1730	2088-2120	25	5.03e-05	-5.28	-5.77	n/a	NEODyS: "Based on 51 optical observations (of which 0 are rejected as outliers) from 2020-11-23.353 to 2020-12-10.480."

2020 UJ	JPL Sentry	1730	2043-2043	1	2.283e-09	-7.81	-7.81	0	JPL: Computed at 06:00 today Pacific time based on 25 observations spanning 12.901 days (2020-Oct-09.2184 to 2020-Oct-22.119114). Diameter approximately 0.050 km. from weighted mean H=24.16.

2018 XX3	JPL Sentry	1730	2088-2112	4	1.202727e-06	-8.55	-8.65	0	JPL: Computed at 08:25 Dec. 25th of 2018 Pacific time based on 24 observations spanning 11.822 days (2018-Dec-13.30812 to 2018-Dec-25.13006). Diameter approximately 0.004 km. from weighted mean H=29.68.

2010 WW8	JPL Sentry	1730	2021-2112	81	1.35367e-07	-6.98	-7.43	0	JPL: Computed at 11:07 April 9th of 2017 Pacific time based on 12 observations spanning .06622 days (2010-Nov-30.37333 to 2010-Nov-30.43955). Diameter approximately 0.018 km. from weighted mean H=26.41.

2007 XB23	JPL Sentry	1730	2078-2115	10	6.694924e-07	-7.48	-7.77	0	JPL: Computed at 20:27 April 6th of 2017 Pacific time based on 10 observations spanning .91734 days (2007-Dec-14.56193 to 2007-Dec-15.47927). Diameter approximately 0.013 km. from weighted mean H=27.07.

2002 XV90	JPL Sentry	1730	2101-2114	7	4.758016e-07	-6.81	-7.05	0	JPL: Computed at 19:38 April 10th of 2017 Pacific time based on 16 observations spanning 18.826 days (2002-Dec-13.44472 to 2003-Jan-01.27031). Diameter approximately 0.031 km. from weighted mean H=25.21.

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 11 December '20

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

2103	Grabbed MPEC 2020-X117 - 2020 XH3 - see above Grabbed MPEC 2020-X118 - 2020 XJ3 - see above Grabbed MPEC 2020-X119 - 2020 XK3 - see above Grabbed MPEC 2020-X120 - 2020 XL3 - see above Grabbed MPEC 2020-X121 - 2020 XM3 - see above
1800	Noted that JPL Sentry has posted 2020 XZ2 as an impact risk - see above
1730	Noted that JPL Sentry has updated its 2002 XV90 risk assessment - see above Noted that JPL Sentry has updated its 2007 XB23 risk assessment - see above Noted that JPL Sentry has updated its 2010 WW8 risk assessment - see above Noted that JPL Sentry has updated its 2018 XX3 risk assessment - see above Noted that JPL Sentry has updated its 2020 UJ risk assessment - see above Noted that JPL Sentry has updated its 2020 WZ3 risk assessment - see above Noted that NEODyS has updated its 2020 WZ3 risk assessment - see above Noted that JPL Sentry has updated its 2020 XE risk assessment - see above Noted that NEODyS has updated its 2020 XE risk assessment - see above Noted that JPL Sentry has posted 2020 XE3 as an impact risk - see above Noted that JPL Sentry has updated its 2020 XH2 risk assessment - see above Noted that NEODyS has removed 2020 XH2 as an impact risk - see above Noted that NEODyS has posted 2020 XV2 as an impact risk - see above Grabbed MPEC 2020-X106 - Daily Orbit Update - see above Grabbed MPEC 2020-X107 - 2018 CK14 - see above Grabbed MPEC 2020-X108 - 2020 VD7 - see above Grabbed MPEC 2020-X109 - 2020 XZ2 - see above Grabbed MPEC 2020-X110 - 2020 XA3 - see above Grabbed MPEC 2020-X111 - 2020 XB3 - see above Grabbed MPEC 2020-X112 - 2020 XC3 - see above Grabbed MPEC 2020-X113 - 2020 XD3 - see above Grabbed MPEC 2020-X114 - 2020 XE3 - see above Grabbed MPEC 2020-X115 - 2020 XF3 - see above Grabbed MPEC 2020-X116 - 2020 XG3 - see above
0531	Grabbed MPEC 2020-X105 - 2020 XY2 - see above

http://www.HohmannTransfer.com/mn/20/20346_1211.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>.