2020-12-14 Tracking News

Contents on 14 December '20

IAU Minor Planet Center
- NEOCP Activity -- 57 listings
- New MPECs -- 26 MPECs
Observers -- 47 observers
Impact Risk Monitoring -- twelve objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1236 risk-listed objects, 162 have had news in the last 31 days. Updated at 2200 UTC on 14 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 14 December '20

The MPC's NEO Confirmation Page has 57 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 57 objects listed. Of these, 41 were "one nighters." So far The Tracking News has counted a total of 88 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 14 December '20

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 26 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2020-X153 time-stamped "00:31 UT" - 2020 XU4 - see below
MPEC 2020-X154 time-stamped "00:33 UT" - 2020 XV4 - see below
MPEC 2020-X155 time-stamped "00:43 UT" - 2020 XW4 - see below
MPEC 2020-X156 time-stamped "03:07 UT" - Comet C/2020 X2 (ATLAS) - see below
MPEC 2020-X157 time-stamped "04:29 UT" - 2020 XY4 - see below
MPEC 2020-X158 time-stamped "04:32 UT" - 2020 UM8 - see below
MPEC 2020-X159 time-stamped "04:34 UT" - 2020 XZ4 - see below
MPEC 2020-X160 time-stamped "12:23 UT" - Daily Orbit Update - see below
MPEC 2020-X161 time-stamped "13:03 UT" - 2020 XA5 - see below
MPEC 2020-X162 time-stamped "13:04 UT" - 2020 XB5 - see below
MPEC 2020-X163 time-stamped "13:06 UT" - 2020 XC5 - see below
MPEC 2020-X164 time-stamped "13:08 UT" - 2020 XD5 - see below
MPEC 2020-X165 time-stamped "13:10 UT" - 2020 XE5 - see below
MPEC 2020-X166 time-stamped "13:13 UT" - 2020 XF5 - see below
MPEC 2020-X167 time-stamped "13:14 UT" - 2020 XG5 - see below
MPEC 2020-X168 time-stamped "13:23 UT" - 2020 KK26 - see below
MPEC 2020-X169 time-stamped "16:45 UT" - 2020 XJ5 - see below
MPEC 2020-X170 time-stamped "17:11 UT" - 2020 XK5 - see below
MPEC 2020-X171 time-stamped "18:09 UT" - 2020 XL5 - see below
MPEC 2020-X172 time-stamped "18:13 UT" - 2020 XM5 - see below
MPEC 2020-X173 time-stamped "18:16 UT" - 2020 XN5 - see below
MPEC 2020-X174 time-stamped "19:33 UT" - 2020 XS5 - see below
MPEC 2020-X175 time-stamped "19:55 UT" - 2016 XF18 - see below
MPEC 2020-X176 time-stamped "19:56 UT" - 2017 YA8 - see below
MPEC 2020-X177 time-stamped "19:56 UT" - 2020 FN3 - see below
MPEC 2020-X178 time-stamped "20:21 UT" - 2020 XT5

MPEC 2020-X178 - "20:21 UT" - 2020 XT5

K20X05T 2020 XT5 (H=19.9 ~355m) was picked up at 1150 UT on 7 Dec. by Pan-STARRS 1 (PS1), observing it at Nov. 10.54-59p4 at G=22.75-23.13, Dec. 7.49-52p3 at i=21.18-88, 9.49-53p4 at G=21.75-22.07, and 12.46-48p2 at G=21.90-22.30. This detection was confirmed by program code "!" (10) via ESA Optical Ground Station (ESA OGS) (Dec. 14.19-22p3).

MPEC 2020-X177 - "19:56 UT" - 2020 FN3

K20F03N 2020 FN3 (risk listed, Earth MOID=0.8 LD, H=24.3 ~47m, NHATS target) from Marco Micheli via Cerro Paranal (Dec. 13.34-35p2 at G=24.7 & 14.33-34p3 at G=24.6-25.0)

MPEC 2020-X176 - "19:56 UT" - 2017 YA8

K17Y08A 2017 YA8 (small asteroid, H=22.3 ~117m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Dec. 13.29-31p5 at G=21.7-22.2 & 14.28-29p3 at G=21.4-22.1)

MPEC 2020-X175 - "19:55 UT" - 2016 XF18

K16X18F 2016 XF18 (small asteroid, H=24.1 ~51m) from Holmes/CTIO (Dec. 13.27-29p3 at G=22.2-4 & 14.26-27p3 at G=22.0-22.1)

MPEC 2020-X174 - "19:33 UT" - 2020 XS5

K20X05S 2020 XS5 (Earth MOID=7.5 LD, H=26.54 ~17m) was picked up at 0707 UT on 14 Dec. by the Mt. Lemmon Survey (MLS), observing it at Dec. 9.32-33p3 and 14.30-31p4. This detection was confirmed by Steward Obs. Mt. Lemmon Station (Dec. 14.34p4 & 14.44p4) and Visnjan Obs. (Dec. 14.77p4).

MPEC 2020-X173 - "18:16 UT" - 2020 XN5

K20X05N 2020 XN5 (small asteroid, H=22.39 ~113m) was picked up at 0917 UT on 12 Dec. by PS1, observing it at Dec. 12.39-41p3 at w=21.27-22.14. This detection was confirmed by Holmes/CTIO (Dec. 13.12-14p3 & 14.16-17p3), Mt. John Obs. (Dec. 13.53-54p3 & 14.52p3), and Visnjan Obs. (Dec. 13.94p2).

MPEC 2020-X172 - "18:13 UT" - 2020 XM5

K20X05M 2020 XM5 (H=20.43 ~278m) was picked up at 1216 UT on 11 Dec. by PS1, observing it at Dec. 11.51-54p4 at w=22.07-37. This detection was confirmed by the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (Dec. 12.38-39p3 at G=20.99-22.59), Visnjan Obs. (Dec. 14.08-10p3 at G=22.4-5), and Holmes/CTIO (Dec. 14.34-35p3 at G=22.2-3).

MPEC 2020-X171 - "18:09 UT" - 2020 XL5

K20X05L 2020 XL5 (H=20.08 ~326m) was picked up at 1449 UT on 12 Dec. by PS1, observing it at Dec. 12.62-64p3. This detection was confirmed by MLS (Nov. 26.51-52p3 at G=20.5-22.4), Visnjan Obs. (Dec. 13.15-18p4), program code 2 via ESA Optical Ground Station (ESA OGS) (Dec. 13.22-23p2 & 14.24p1), and Holmes/CTIO (Dec. 14.33-34p3).

MPEC 2020-X170 - "17:11 UT" - 2020 XK5

K20X05K 2020 XK5 (small asteroid, Q=4.055 AU, H=23.64 ~63m) was picked up at 0918 UT on 12 Dec. by PS1, observing it at Dec. 12.39-41p3 at w=21.70-22.15. This detection was confirmed by Holmes/CTIO (Dec. 13.09-10p3 & 14.19-21p3) and Mt. John Obs. (Dec. 13.55-56p3 & 14.53-54p3).

MPEC 2020-X169 - "16:45 UT" - 2020 XJ5

K20X05J 2020 XJ5 (small asteroid, Earth MOID=6.9 LD, H=25.50 ~27m) was picked up at 0953 UT on 9 Dec. by the Bok Telescope, observing it at Dec. 9.41-45p6 at G=21.9-22.2. This detection was confirmed by Astronomical Research Obs. Westfield (Dec. 10.18-19p3 at V=22.1-2), CSS-Kuiper (Dec. 12.33-35p3 at G=21.58-22.04), and the Spacewatch 1.8m telescope (Dec. 14.34-36p3 at G=22.2-23.2).

MPEC 2020-X168 - "13:23 UT" - 2020 KK26

K20K26K 2020 KK26 (H=19.1 ~513m) from PS1 (2015 Jan. 15.38-42p3 at G=21.71-92, 2015 Feb. 20.22p1 at G=21.66, 2015 Feb. 23.23p1 at G=20.88, 2016 Feb. 3.52-55p3 at G=23.14-52, 2016 March 7.49-54p4 at G=22.39-87, 2016 March 10.36-39p4 at G=22.46-23.49, 2017 Dec. 23.36-40p3 at G=21.29-22.36, 2018 Jan. 5.35-39p3 at G=21.80-22.88, 2018 Jan. 12.37-41p4 at G=21.40-22.79 & Sept. 5.59-61p4 at G=21.68-22.29) and Pan-STARRS 2 (PS2) (Sept. 27.59-60p2 at G=21.75-23.19)

MPEC 2020-X167 - "13:14 UT" - 2020 XG5

K20X05G 2020 XG5 (Earth MOID=2.8 LD, H=27.0 ~13m) was picked up at 1141 UT on 12 Dec. by PS1, observing it at Dec. 12.49-52p4. This detection was confirmed by program code 4 via ESA Optical Ground Station (ESA OGS) (Dec. 12.97-98p3), Visnjan Obs. (Dec. 13.03-04p5), ESA OGS/code 2 (Dec. 14.05-06p3), Schiaparelli Obs. (Dec. 14.07-09p2), and Steward Mt. Lemmon Sta. (Dec. 14.26p4).

MPEC 2020-X166 - "13:13 UT" - 2020 XF5

K20X05F 2020 XF5 (Earth MOID=6.2 LD, H=25.4 ~28m) was picked up at 0956 UT on 11 Dec. by PS1, observing it at Dec. 11.40-43p3 and 12.37-39p3. This detection was confirmed by ESA OGS/code 2 (Dec. 12.85p3), Holmes/CTIO (Dec. 13.05-06p3), and Mt. John Obs. (Dec. 14.46p3).

MPEC 2020-X165 - "13:10 UT" - 2020 XE5

K20X05E 2020 XE5 (small asteroid, H=24.6 ~41m) was picked up at 1032 UT on 10 Dec. by PS1, observing it at Dec. 10.44-48p4. This detection was confirmed by Holmes/CTIO (Dec. 11.22-23p3 & 13.19-20p3), Mt. John Obs. (Dec. 13.59-60p3), and CSS-Kuiper (Dec. 14.30-31p4 at G=21.27-22.14).

MPEC 2020-X164 - "13:08 UT" - 2020 XD5

K20X05D 2020 XD5 (risk listed, H=20.0 ~339m) was picked up at 1209 UT on 11 Dec. by PS1, observing it at Dec. 11.51-54p4. This detection was confirmed by ESA OGS/code "!" (10) (Dec. 12.20-22p3), Steward Mt. Lemmon Sta. (Dec. 12.34-35p4 at G=20.66-22.10 & 14.32p4 at G=20.38-21.77), Visnjan Obs. (Dec. 13.10-11p5), and program code 1 via Schwarzschild Obs. (Dec. 14.02p3).

MPEC 2020-X163 - "13:06 UT" - 2020 XC5

K20X05C 2020 XC5 (Q=4.159 AU, H=20.9 ~224m) was picked up at 0744 UT on 12 Dec. by ATLAS Mauna Loa, observing it at Dec. 12.32-34p4. This detection was confirmed by the Catalina Sky Survey (CSS) (Dec. 12.24p2), Mt. John Obs. (Dec. 12.56p4, 13.49-50p4 & 14.47p4), Visnjan Obs. (Dec. 12.80-81p4 & 13.83p3), Schiaparelli Obs. (Dec. 12.87-88p3), Holmes/CTIO (Dec. 13.04-05p5 & 14.08-09p4), and Farra d'Isonzo Obs. (Dec. 13.85-87p2).

MPEC 2020-X162 - "13:04 UT" - 2020 XB5

K20X05B 2020 XB5 (small asteroid, H=24.1 ~51m) was picked up at 1019 UT on 9 Dec. by Bok Tel., observing it at Dec. 9.43-45p3. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 9.50-51p2 at G=21.70-22.40), ARO Westfield (Dec. 10.28-29p3 at V=22.0-22.2), Spacewatch 1.8m (Dec. 12.32p2), and Visnjan Obs. (Dec. 13.96-98p3 at G=21.9-22.1).

MPEC 2020-X161 - "13:03 UT" - 2020 XA5

K20X05A 2020 XA5 (small asteroid, Earth MOID=9.9 LD, H=24.1 ~51m) was picked up at 1104 UT on 9 Dec. by PS1, observing it at Dec. 9.44-47p7. This detection was confirmed by ESA OGS/code 2 (Dec. 10.98-01p3), Visnjan Obs. (Dec. 13.87-89p3), ESA OGS/code 4 (Dec. 13.96-99p3), and CSS-Kuiper (Dec. 14.20-21p4 at G=21.19-22.35).

<< DOU on 14 December '20 >> MPEC 2020-X160 - "12:23 UT" - Daily Orbit Update

Observations of risk-listed objects
K20X04F 2020 XF4 (small asteroid, arc=9 days, H=27.5 ~11m, close passer, NHATS target) from North Obs. (Dec. 12.94-95p3), ATLAS Mauna Loa (Dec. 13.47-49p4), Visnjan Obs. (Dec. 13.81-82p6), Schwarzschild Obs./code 1 (Dec. 14.03p3), ESA OGS/code 2 (Dec. 14.08p3), and Steward Mt. Lemmon Sta. (Dec. 14.27p4)
K20X03X 2020 XX3 (small asteroid, arc=4 days, H=28.4 ~7m, close passer, NHATS target) from the Spacewatch 0.9m telescope (Dec. 13.43p3), Forti Obs. (Dec. 13.75-77p3), Schwarzschild Obs./code 1 (Dec. 13.80p3), ESA OGS/code 2 (Dec. 13.85-86p3), and Steward Mt. Lemmon Sta. (Dec. 14.19-20p4)
K20X03E 2020 XE3 (small asteroid, Q=4.400 AU, arc=8 days, H=24.8 ~37m) from CSS-Kuiper (Dec. 14.13p3) and Spacewatch 0.9m (Dec. 14.19-22p3)
K20X02Z 2020 XZ2 (small asteroid, arc=7 days, H=22.3 ~117m) from ESA OGS/code 2 (Dec. 13.86-87p3) and Spacewatch 0.9m (Dec. 14.14-15p3)
K20X00F 2020 XF (small asteroid, arc=10 days, H=26.7 ~15m, close passer, NHATS target) from Steward Mt. Lemmon Sta. (Dec. 14.11p2)
K20U03Q 2020 UQ3 (small asteroid, arc=58 days, H=23.8 ~59m) from UH/Tholen NEO Follow-Up 2.24m Telescope (Dec. 10.27p1 at G=24.94)
Observations of recently (no longer) risk-listed objects
K20X02V 2020 XV2 (small asteroid, Q=4.592 AU, arc=5 days, H=23.5 ~68m) from Steward Mt. Lemmon Sta. (Dec. 14.30p4) and Spacewatch 0.9m (Dec. 14.43-44p3)
K20X02H 2020 XH2 (small asteroid, arc=6 days, H=27.1 ~13m, close passer, NHATS target) from ESA OGS/code 2 (Dec. 14.07-08p3) and Steward Mt. Lemmon Sta. (Dec. 14.25p4)
K20X01G 2020 XG1 (i=50.4°, arc=9 days, H=21.7 ~155m) from Spacewatch 0.9m (Dec. 13.45p2) and Steward Mt. Lemmon Sta. (Dec. 14.24p4)
K20X00R 2020 XR (Q=4.026 AU, arc=3 opp, H=19.8 ~371m) from MLS (2016 Dec. 1.06-07p3 & 2017 Jan. 7.07-08p2) and Spacewatch 0.9m (Dec. 14.07-08p3)
K20W05L 2020 WL5 (arc=16 days, H=21.3 ~186m) from Steward Mt. Lemmon Sta. (Dec. 14.15-16p4)
K20W00G 2020 WG (Q=4.015 AU, arc=28 days, H=21.7 ~155m) from Steward Mt. Lemmon Sta. (Dec. 14.21p4)
Observations of close-passing objects
K20X04Z 2020 XZ4 (arc=3 days, H=24.6 ~41m, NHATS target) from Schwarzschild Obs./code 1 (Dec. 14.12p3) and Steward Mt. Lemmon Sta. (Dec. 14.27p4)
K20X04V 2020 XV4 (arc=2 days, H=25.4 ~28m) from Schwarzschild Obs./code 1 (Dec. 14.01p4)
K20X04C 2020 XC4 (arc=5 days, H=26.0 ~21m, NHATS target) from Northolt Branch Obs. (Dec. 12.82-84p3) and Steward Mt. Lemmon Sta. (Dec. 14.17p4)
K20X03J 2020 XJ3 (arc=5 days, H=25.5 ~27m, NHATS target) from Schwarzschild Obs./code 1 (Dec. 13.98p3 & 14.12-13p3) and Steward Mt. Lemmon Sta. (Dec. 14.39p2)
K20X01H 2020 XH1 (arc=8 days, H=22.9 ~89m) from Holmes/CTIO (Dec. 14.20-21p4) and Steward Mt. Lemmon Sta. (Dec. 14.33-36p4)
K20X01C 2020 XC1 (arc=8 days, H=27.0 ~13m, NHATS target) from Schwarzschild Obs./code 1 (Dec. 14.11p4)
K20X01B 2020 XB1 (arc=8 days, H=26.2 ~19m) from Schwarzschild Obs./code 1 (Dec. 14.04p2 at V=21.3-23.0)
K20X00O 2020 XO (arc=7 days, H=24.0 ~54m) from Northolt Branch Obs. (Dec. 12.89-90p4)
K20X00N 2020 XN (arc=8 days, H=24.5 ~43m) from Schwarzschild Obs./code 1 (Dec. 11.74p3) and Northolt Branch Obs. (Dec. 12.87-88p5)
K20T00V 2020 TV (arc=6 days, H=25.6 ~26m) from ARO Westfield (Oct. 13.09-11p3 at V=21.9-22.4)
K15XG9Y 2015 XY169 (arc=2 opp, H=25.6 ~26m, NHATS target) from CSS (Dec. 13.39-41p2)
K13T00D 2013 TD (arc=2 opp, H=26.6 ~16m) from ARO Westfield (Oct. 13.36-39p3 at V=22.0-22.3)
K12UH1K 2012 UK171 (arc=3 opp, H=24.4 ~45m, NHATS target) from Spacewatch 0.9m (Dec. 14.27-28p3)
Observation campaigns (NHATS targets, radar support)
K20X04J 2020 XJ4 (arc=94 days, H=24.7 ~39m, NHATS) from PS1 (Sept. 10.31-34p3 at G=21.69-22.52, Oct. 11.22-26p2 at G=22.23-51 & 18.24-26p3 at G=21.19-70) and PS2 (Nov. 8.22-25p4 at G=21.57-22.26)
K20X03W 2020 XW3 (arc=5 days, H=25.7 ~25m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 14.27p2)
K20X02W 2020 XW2 (arc=7 days, H=25.0 ~34m, NHATS) from CSS-Kuiper (Dec. 14.12p3 at G=21.06-22.36)
K20X02T 2020 XT2 (arc=19 days, H=24.7 ~39m, NHATS) from Holmes/CTIO (Dec. 14.19-20p3)
K20X02O 2020 XO2 (arc=6 days, H=24.7 ~39m, NHATS) from Holmes/CTIO (Dec. 14.17-18p3) and Steward Mt. Lemmon Sta. (Dec. 14.20p4)
K20X01D 2020 XD1 (arc=7 days, H=27.1 ~13m, NHATS) from ESA OGS/code 2 (Dec. 13.10-11p2)
K20X00W 2020 XW (arc=9 days, H=24.6 ~41m, NHATS) from Farra d'Isonzo Obs. (Dec. 13.76-79p4), Schwarzschild Obs./code 1 (Dec. 13.80p3), and Steward Mt. Lemmon Sta. (Dec. 14.13p4)
K20W03F 2020 WF3 (arc=23 days, H=23.7 ~62m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 14.29p4)
K20W01D 2020 WD1 (arc=28 days, H=23.6 ~65m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 14.28-29p4)
K20V02Z 2020 VZ2 (arc=33 days, H=24.9 ~35m, NHATS) from Holmes/CTIO (Dec. 14.15-16p3 at G=22.1-2)
K20S00O 2020 SO (NHATS) from Steward Mt. Lemmon Sta. (Dec. 14.15p4)
-- NHATS target table
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20X04H 2020 XH4 (arc=4 days, H=23.2 ~78m) from Steward Mt. Lemmon Sta. (Dec. 14.31-32p4)
K20X04E 2020 XE4 (arc=2 days, H=25.5 ~27m) from Schwarzschild Obs./code 1 (Dec. 13.78p4)
K20X03V 2020 XV3 (arc=5 days, H=22.8 ~93m) from Steward Mt. Lemmon Sta. (Dec. 14.23-24p4)
K20X03S 2020 XS3 (arc=6 days, H=25.0 ~34m) from Schwarzschild Obs./code 1 (Dec. 13.83p4) and Steward Mt. Lemmon Sta. (Dec. 14.13p4)
K20X03R 2020 XR3 (arc=9 days, H=22.7 ~98m) from Steward Mt. Lemmon Sta. (Dec. 14.41p2)
K20X03M 2020 XM3 (arc=8 days, H=22.7 ~98m) from Steward Mt. Lemmon Sta. (Dec. 14.24p2)
K20X03F 2020 XF3 (arc=5 days, H=25.3 ~29m) from Schwarzschild Obs./code 1 (Dec. 14.03p4)
K20X03D 2020 XD3 (arc=5 days, H=25.4 ~28m) from Schwarzschild Obs./code 1 (Dec. 13.82p3) and Steward Mt. Lemmon Sta. (Dec. 14.19p3)
K20X03C 2020 XC3 (arc=5 days, H=22.5 ~107m) from Holmes/CTIO (Dec. 14.04-05p3) and Steward Mt. Lemmon Sta. (Dec. 14.11p4)
K20X03A 2020 XA3 (arc=6 days, H=24.4 ~45m) from Steward Mt. Lemmon Sta. (Dec. 14.20p4)
K20X02S 2020 XS2 (Q=4.170 AU, arc=9 days, H=24.9 ~35m) from Steward Mt. Lemmon Sta. (Dec. 14.28-29p4)
K20X02Q 2020 XQ2 (i=41.9°, arc=6 days, H=22.7 ~98m) from Northolt Branch Obs. (Dec. 12.86p3) and Steward Mt. Lemmon Sta. (Dec. 14.09p4)
K20X02P 2020 XP2 (arc=7 days, H=22.1 ~129m) from Schwarzschild Obs./code 1 (Dec. 14.05p4 & 14.13p3)
K20X02N 2020 XN2 (arc=6 days, H=23.3 ~74m) from Steward Mt. Lemmon Sta. (Dec. 14.20-21p4)
K20X02L 2020 XL2 (arc=17 days, H=24.0 ~54m) from Spacewatch 0.9m (Dec. 14.39-42p3 at R=21.6-22.3)
K20X02K 2020 XK2 (arc=7 days, H=23.2 ~78m) from CSS-Kuiper (Dec. 14.17-18p4)
K20X02J 2020 XJ2 (arc=7 days, H=24.1 ~51m) from Steward Mt. Lemmon Sta. (Dec. 14.19p3) and Spacewatch 0.9m (Dec. 14.24-25p3)
K20X02E 2020 XE2 (arc=7 days, H=24.4 ~45m) from Spacewatch 0.9m (Dec. 14.25-26p3)
K20X01R 2020 XR1 (arc=8 days, H=23.7 ~62m) from ESA OGS/code 4 (Dec. 13.84-85p2) and Steward Mt. Lemmon Sta. (Dec. 14.12-13p4)
K20X00K 2020 XK (arc=10 days, H=25.0 ~34m) from Spacewatch 1.8m (Dec. 13.52-53p3) and Schwarzschild Obs./code 1 (Dec. 14.04p3)
K20W05T 2020 WT5 (arc=14 days, H=22.2 ~123m) from Holmes/CTIO (Dec. 14.15-16p3)
K20W04H 2020 WH4 (Q=4.521 AU, arc=30 days, H=25.0 ~34m) from CSS-Kuiper (Dec. 14.31-34p4)
K20W03C 2020 WC3 (arc=23 days, H=22.4 ~112m) from Steward Mt. Lemmon Sta. (Dec. 14.28p4)
K20W00X 2020 WX (arc=28 days, H=23.6 ~65m) from Bok Tel. (Dec. 14.21-23p4 at G=22.2-9)
K20V07C 2020 VC7 (arc=39 days, H=24.0 ~54m) from Forti Obs. (Dec. 13.74p3)
K20V06E 2020 VE6 (arc=30 days, H=23.7 ~62m) from Schwarzschild Obs./code 1 (Dec. 13.81p3) and Steward Mt. Lemmon Sta. (Dec. 14.22-23p4)
K20T07Q 2020 TQ7 (arc=85 days, H=22.1 ~129m) from CSS (Dec. 13.48-50p4)
K20T06Z 2020 TZ6 (Q=4.624 AU, arc=8 days, H=23.8 ~59m) from ARO Westfield (Oct. 13.17-18p3)
K20S05T 2020 ST5 (arc=52 days, H=23.3 ~74m) from ARO Westfield (Sept. 19.27-29p3 at V=22.2-6)
K20S01P 2020 SP1 (arc=29 days, H=23.1 ~81m) from ARO Westfield (Oct. 13.10-11p3 at V=22.1-5)
K20R08S 2020 RS8 (arc=11 days, H=24.7 ~39m) from ARO Westfield (Sept. 16.19-21p3)
K20R06K 2020 RK6 (arc=13 days, H=25.3 ~29m) from ARO Westfield (Sept. 16.11-13p3)
K18X03U 2018 XU3 (arc=2 opp, H=25.4 ~28m) from Schwarzschild Obs./code 1 (Dec. 13.81p3)
K12XD3E 2012 XE133 (arc=2 opp, H=23.4 ~71m) from CSS (Dec. 13.46-47p3)
K20X03K 2020 XK3 (i=58.0°, arc=5 days, H=21.8 ~148m) from Holmes/CTIO (Dec. 14.11-12p3) and Steward Mt. Lemmon Sta. (Dec. 14.18p4)
K20X01F 2020 XF1 (i=51.9°, arc=9 days, H=21.8 ~148m) from Mt. John Obs. (Dec. 13.48-49p3), Holmes/CTIO (Dec. 14.10-11p3), and Steward Mt. Lemmon Sta. (Dec. 14.11-12p3)
K20X00P 2020 XP (arc=27 days, H=21.8 ~148m) from Holmes/CTIO (Dec. 14.05-06p3) and Steward Mt. Lemmon Sta. (Dec. 14.20-21p4)
K20S02H 2020 SH2 (i=44.2°, arc=31 days, H=22.0 ~135m) from ARO Westfield (Oct. 13.04-06p2 at V=22.0-22.1)
Observations of other objects
K20X03L 2020 XL3 (arc=5 days, H=21.2 ~195m) from Steward Mt. Lemmon Sta. (Dec. 14.26p4)
K20X03H 2020 XH3 (arc=5 days, H=20.5 ~269m) from Steward Mt. Lemmon Sta. (Dec. 14.13-15p3)
K20X01M 2020 XM1 (arc=8 days, H=21.5 ~170m) from CSS-Kuiper (Dec. 14.09-10p4 at G=20.79-22.55)
K20X00S 2020 XS (i=51.4°, arc=10 days, H=21.2 ~195m) from Holmes/CTIO (Dec. 14.12-14p3) and CSS-Kuiper (Dec. 14.14-15p4)
K20W05V 2020 WV5 (arc=22 days, H=20.1 ~323m) from Steward Mt. Lemmon Sta. (Dec. 14.33-36p4)
K20W05S 2020 WS5 (i=40.9°, Q=4.036 AU, arc=17 days, H=20.8 ~234m) from ATLAS Mauna Loa (Dec. 13.47-48p3) and Holmes/CTIO (Dec. 14.22p5)
K20W05M 2020 WM5 (Q=4.833 AU, arc=16 days, H=20.9 ~224m) from CSS (Dec. 13.46-48p4) and Steward Mt. Lemmon Sta. (Dec. 14.36-38p4)
K20W05A 2020 WA5 (arc=18 days, H=21.5 ~170m) from CSS (Dec. 13.32-36p7)
K20W02H 2020 WH2 (Q=4.561 AU, arc=26 days, H=20.1 ~323m) from Steward Mt. Lemmon Sta. (Dec. 14.37-38p4)
K20V05C 2020 VC5 (i=42.6°, Q=4.252 AU, arc=31 days, H=20.5 ~269m) from Holmes/CTIO (Dec. 14.07-09p3)
K20V00A 2020 VA (Q=4.445 AU, arc=55 days, H=21.1 ~204m) from Holmes/CTIO (Dec. 14.12-13p3 at G=22.5-8)
K20U01L 2020 UL1 (arc=66 days, H=20.1 ~323m) from Holmes/CTIO (Dec. 14.06-07p3)
K20R33Q 2020 RQ33 (arc=95 days, H=21.4 ~178m) from Holmes/CTIO (Dec. 14.07-10p3 at G=22.5)
K20R07H 2020 RH7 (i=43.8°, arc=63 days, H=20.1 ~323m) from ARO Westfield (Sept. 16.25-26p3)
K20R00U 2020 RU (Q=4.833 AU, arc=105 days, H=19.2 ~490m) from CSS (Dec. 13.37-39p4)
K20Q06Q 2020 QQ6 (Q=4.107 AU, arc=122 days, H=19.8 ~371m) from Visnjan Obs. (Dec. 13.84-86p4)
K20M02F 2020 MF2 (Q=4.267 AU, arc=139 days, H=19.7 ~389m) from ARO Westfield (Oct. 13.04-05p3 at V=21.9-22.1)
K18G04X 2018 GX4 (arc=4 opp, H=19.2 ~490m) from Bok Tel. (Dec. 13.42-43p4)
K15B04F 2015 BF4 (arc=6 opp, H=20.5 ~269m) from Forti Obs. (Dec. 13.72-73p3)
K14X08G 2014 XG8 (i=57.1°, arc=5 opp, H=17.5 ~1.07 km) from Pleasant Groves Obs. (Dec. 8.35-38p3)
K14W07O 2014 WO7 (arc=3 opp, H=20.5 ~269m) from ARO Westfield (Oct. 13.13-14p2 at V=22.1)
K14J57H 2014 JH57 (Q=6.247 AU, arc=5 opp, H=16.2 ~1.95 km) from the Zwicky Transient Facility (ZTF) (Dec. 13.55-57p5)
K13U14X 2013 UX14 (arc=4 opp, H=18.3 ~741m) from Piobbico Obs. (Dec. 13.90-91p2) and HOB Obs. (Dec. 13.97-99p2)
K02G08Z 2002 GZ8 (Q=4.633 AU, arc=4 opp, H=18.8 ~589m) from Northolt Branch Obs. (Dec. 12.91-92p5), CSS (Dec. 13.46-48p4), and Piobbico Obs. (Dec. 13.96p2)
J99V15X 1999 VX15 (Q=4.807 AU, arc=2 opp, H=18.7 ~616m) from ATLAS Mauna Loa (Dec. 13.49-51p6)
p3125 513125 1997 GC32 from ATLAS Mauna Loa (Dec. 13.47-49p4)
m2505 482505 2012 TQ78 from HOB Obs. (Dec. 13.80-82p3)
l4554 474554 2003 YQ94 from Castelmartini Obs. (Dec. 13.80p2)
k5749 465749 2009 WO6 from CSS (Dec. 13.43-45p4)
j0263 450263 2003 WD158 from ATLAS Mauna Loa (Dec. 13.43-45p3)
h8902 438902 2009 WF104 from CSS (Dec. 13.39-40p4)
g8086 428086 2006 NM from CSS (Dec. 13.15p1)
c0359 380359 2002 TN30 from CSS (Dec. 13.53-54p4)
a1532 361532 2007 HF44 from Bok Tel. (Dec. 13.50-51p4)
a0502 360502 2003 EO16 from Mt. John Obs. (Dec. 13.43p2)
Y5705 345705 2006 VB14 from Castelmartini Obs. (Dec. 13.76-77p3)
O1596 241596 1998 XM2 from ATLAS Mauna Loa (Dec. 13.49-51p3)
M3456 223456 2003 UB10 from Bok Tel. (Dec. 13.50-52p4)
L6707 216707 2004 XP164 from ATLAS Mauna Loa (Dec. 13.54-58p4)
J0208 190208 2006 AQ from Bok Tel. (Dec. 13.48-49p4)
G3902 163902 2003 SW222 from Wickede Obs. (Dec. 13.72-73p5)
G3364 163364 2002 OD20 from ARO Westfield (Oct. 13.36-39p3)
F9402 159402 1999 AP10 from CSS (Dec. 13.43-45p3) and AstroColauri Obs. (Dec. 13.85-88p3)
F4330 154330 2002 VX94 from CSS (Dec. 13.13-15p4)
F3201 153201 2000 WO107 from San Marcello Pistoiese Obs. (Dec. 13.95-99p2 & 14.07p1)
F2978 152978 2000 GJ147 from CSS (Dec. 13.13-15p3)
F2931 152931 2000 EA107 from ZTF (Dec. 13.55-57p4)
E3649 143649 2003 QQ47 from ZTF (Dec. 12.56p1 & 13.55-56p3)
E2348 142348 2002 RX211 from Bok Tel. (Dec. 13.48-49p4)
D8859 138859 2000 WN63 from CSS (Dec. 13.53-54p4)
D7805 137805 1999 YK5 from Castelmartini Obs. (Dec. 13.72-73p2)
D7032 137032 1998 UO1 from Castelmartini Obs. (Nov. 23.75p3)
99935 99935 2002 AV4 from CSS (Dec. 13.48-50p4)
90075 90075 2002 VU94 from Castelmartini Obs. (Nov. 23.76p3)
53435 53435 1999 VM40 from CSS (Dec. 13.41-43p4)
53319 53319 1999 JM8 from Bok Tel. (Dec. 13.48-50p4)
36284 36284 2000 DM8 from CSS (Dec. 13.06-08p4)
31669 31669 1999 JT6 from ZTF (Dec. 13.55-57p4)
21374 21374 1997 WS22 from CSS (Dec. 13.39-41p4)
15817 15817 Lucianotesi (1994 QC) from SATINO-1 (July 20.01-05p3)
10150 10150 1994 PN from ATLAS Mauna Loa (Dec. 13.60-66p4)
08567 8567 1996 HW1 from ATLAS Mauna Loa (Dec. 13.61-65p4)
07753 7753 1988 XB from Berthelot Obs. (Dec. 8.84-99p13)
07350 7350 1993 VA from ZTF (Dec. 13.55-57p3)
06053 6053 1993 BW3 from HOB Obs. (Dec. 13.79p3)
02329 2329 Orthos (1976 WA) from ZTF (Dec. 13.56-57p2)
01862 1862 Apollo (1932 HA) from Bok Tel. (Dec. 13.52-53p4)
01580 1580 Betulia (1950 KA) from CSS (Dec. 13.15-17p4)
01036 1036 Ganymed (1924 TD) from ATLAS Mauna Loa (Dec. 13.52-53p3 & 13.59p1)

MPEC 2020-X159 - "04:34 UT" - 2020 XZ4

K20X04Z 2020 XZ4 (Earth MOID=3.9 LD, H=24.6 ~41m, NHATS target) was picked up at 1105 UT on 11 Dec. by PS1, observing it at Dec. 11.46-50p4 and 12.46-48p2. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 12.32-33p3), Visnjan Obs. (Dec. 12.82-83p2), Paus Obs. (Dec. 12.89-90p2), Schwarzschild Obs./code 1 (Dec. 13.77p4), Schiaparelli Obs. (Dec. 13.91-94p2), and ESA OGS/code 4 (Dec. 14.01p3).

MPEC 2020-X158 - "04:32 UT" - 2020 UM8

K20U08M 2020 UM8 (small asteroid, H=25.2 ~31m) was picked up at 0059 UT on 18 Oct. by program code "!" (10) via DECam, observing it at Oct. 18.04-07p2 at V=24.7 and 18.15p1. This detection was confirmed by MLS (Dec. 12.23-24p4), Steward Mt. Lemmon Sta. (Dec. 12.27p2 & 14.17p4), Mt. John Obs. (Dec. 12.63p4 & 13.50-51p4), Holmes/CTIO (Dec. 13.07p3), and Visnjan Obs. (Dec. 13.92-93p3).

MPEC 2020-X157 - "04:29 UT" - 2020 XY4

K20X04Y 2020 XY4 (Earth MOID=1.0 LD, H=26.8 ~15m, NHATS target) was picked up at 1344 UT on 11 Dec. by PS2, observing it at Dec. 11.57-61p4 at w=20.97-22.22. This detection was confirmed by ESA OGS/code "!" (10) (Dec. 12.18-19p2), PS1 (Dec. 12.43-47p3), Visnjan Obs. (Dec. 12.98p4), Spacewatch 0.9m (Dec. 13.53-54p2), Schwarzschild Obs./code 1 (Dec. 13.88p1 & 13.98p2), Schiaparelli Obs. (Dec. 14.02-04p2), ESA OGS/code 2 (Dec. 14.04-05p3), and San Marcello Pistoiese Obs. (Dec. 14.15-16p2).

MPEC 2020-X156 - "03:07 UT" - Comet C/2020 X2 (ATLAS)

CK20X020 C/2020 X2 (ATLAS) (Centaur, q=3.829 AU, Q=28.929 AU, TP=2020 Nov. 15.88476 TT) was picked up at 1205 UT on 10 Dec. by ATLAS Mauna Loa, observing it at Dec. 10.50-55p4. This detection was confirmed by MLS (Sept. 25.47p2, Oct. 14.41-43p4, 29.39-41p4 & Nov. 23.45-47p4), ZTF (Oct. 17.44-47p2 & 19.46-49p2), PS2 (Dec. 8.44-47p4), Visnjan Obs. (Dec. 11.07-08p3 & 14.01-02p4), Paus Obs. (Dec. 11.90p1 & 11.95p1), Hidetaka Sato via iTelescope Obs. Mayhill (Dec. 12.35p2), Gisborne Obs. (Dec. 12.45-48p4), ATLAS Haleakala (Dec. 12.50-54p4), Bernezzo Obs. (Dec. 12.90-95p3), Sormano2 Obs. (Dec. 12.91-93p4), Great Shefford Obs. (Dec. 12.95-97p4), Farra d'Isonzo Obs. (Dec. 12.99-00p2), program code "=" (38) via iTelescope Obs. Nerpio (Dec. 13.21-22p2), Mountainville Obs. (Dec. 13.22-26p2), B. Lutkenhoner via Slooh.com Chile Obs. (Dec. 13.23p1 & 13.28p1), and Spica Obs. (Dec. 13.90-93p3).

MPEC 2020-X155 - "00:43 UT" - 2020 XW4

K20X04W 2020 XW4 (H=21.4 ~178m) was picked up at 1308 UT on 10 Dec. by PS2, observing it at Dec. 10.55-58p3. This detection was confirmed by PS1 (Dec. 9.53-57p4), ESA OGS/code "!" (10) (Dec. 12.23-24p3), Visnjan Obs. (Dec. 13.11-12p3), and Schwarzschild Obs./code 1 (Dec. 13.99p3).

MPEC 2020-X154 - "00:33 UT" - 2020 XV4

K20X04V 2020 XV4 (Earth MOID=6.3 LD, H=25.2 ~31m) was picked up at 0818 UT on 12 Dec. by MLS, observing it at Dec. 12.35-36p3. This detection was confirmed by CSS (Dec. 12.38-40p2), Steward Mt. Lemmon Sta. (Dec. 12.40p4), Mt. John Obs. (Dec. 12.59p4 & 13.60-61p4), Visnjan Obs. (Dec. 12.91-92p4), Xingming Obs. #3 (Dec. 13.78p5), Farra d'Isonzo Obs. (Dec. 13.90-93p3), and Pascoli Obs. (Dec. 13.98-99p3).

MPEC 2020-X153 - "00:31 UT" - 2020 XU4

K20X04U 2020 XU4 (risk listed, Earth MOID=0.7 LD, H=27.8 ~9m, close passer, NHATS target) was picked up at 0756 UT on 12 Dec. by Bok Tel., observing it at Dec. 12.33-35p4. This detection was confirmed by CSS-Kuiper (Dec. 12.44p4), Visnjan Obs. (Dec. 12.86-87p3), and ESA OGS/code 2 (Dec. 13.93-95p3).

Observers on 14 December '20

A total of 47 observers appear in today's MPECs.

Code	Observer / observatory
`L74`	AstroColauri Obs., 1 in MPEC 2020-X160 -- 159402
`H21`	Astronomical Research Obs. Westfield in Illinois, 14 in MPECs 2020-X160, 2020-X162 & 2020-X169 -- 2020 XJ5, 2020 XB5, 2020 TZ6, 2020 TV, 2020 ST5, 2020 SP1, 2020 SH2, 2020 RS8, 2020 RK6, 2020 RH7, 2020 MF2, 2014 WO7, 2013 TD, 163364
`T05`	ATLAS Haleakala in Hawaii, 1 in MPEC 2020-X156 -- C/2020 X2
`T08`	ATLAS Mauna Loa in Hawaii, 12 in MPECs 2020-X156, 2020-X160 & 2020-X163 -- 2020 XF4, 2020 XC5, C/2020 X2, 2020 WS5, 1999 VX15, 513125, 450263, 241596, 216707, 10150, 8567, 1036
`C77`	Bernezzo Obs. in Italy, 1 in MPEC 2020-X156 -- C/2020 X2
`L54`	Berthelot Obs., 1 in MPEC 2020-X160 -- 7753
`V00`	Bok Telescope in Arizona, 11 in MPECs 2020-X153, 2020-X160, 2020-X162 & 2020-X169 -- 2020 XU4, 2020 XJ5, 2020 XB5, 2020 WX, 2018 GX4, 53319, 361532, 223456, 190208, 142348, 1862
`160`	Castelmartini Obs. in Italy, 5 in MPEC 2020-X160 -- 90075, 474554, 345705, 137805, 137032
`703`	Catalina Sky Survey (CSS) in Arizona, 22 in MPECs 2020-X154, 2020-X160 & 2020-X163 -- 2020 XV4, 2020 XC5, 2020 WM5, 2020 WA5, 2020 TQ7, 2020 RU, 2015 XY169, 2012 XE133, 2002 GZ8, 99935, 53435, 465749, 438902, 428086, 380359, 36284, 21374, 159402, 154330, 152978, 138859, 1580
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 11 in MPECs 2020-X153, 2020-X160, 2020-X161, 2020-X165, 2020-X169 & 2020-X172 -- 2020 XW2, 2020 XU4, 2020 XS, 2020 XM5, 2020 XM1, 2020 XK2, 2020 XJ5, 2020 XE5, 2020 XE3, 2020 XA5, 2020 WH4
`309&`	Marco Micheli via Cerro Paranal in Chile, 1 in MPEC 2020-X177 -- 2020 FN3
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 25 in MPECs 2020-X158, 2020-X160, 2020-X163, 2020-X165, 2020-X166, 2020-X170, 2020-X171, 2020-X172, 2020-X173, 2020-X175 & 2020-X176 -- 2020 XT2, 2020 XS, 2020 XP, 2020 XO2, 2020 XN5, 2020 XM5, 2020 XL5, 2020 XK5, 2020 XK3, 2020 XH1, 2020 XF5, 2020 XF1, 2020 XE5, 2020 XC5, 2020 XC3, 2020 WT5, 2020 WS5, 2020 VZ2, 2020 VC5, 2020 VA, 2020 UM8, 2020 UL1, 2020 RQ33, 2017 YA8, 2016 XF18
`W84!`	program code "!" (10) via DECam in Chile, 1 in MPEC 2020-X158 -- 2020 UM8
`J04!`	program code "!" (10) via ESA Optical Ground Station (ESA OGS) in the Canary Islands, 4 in MPECs 2020-X155, 2020-X157, 2020-X164 & 2020-X178 -- 2020 XY4, 2020 XW4, 2020 XT5, 2020 XD5
`J042`	program code 2 via ESA Optical Ground Station (ESA OGS) in the Canary Islands, 11 in MPECs 2020-X153, 2020-X157, 2020-X160, 2020-X161, 2020-X166, 2020-X167 & 2020-X171 -- 2020 XZ2, 2020 XY4, 2020 XX3, 2020 XU4, 2020 XL5, 2020 XH2, 2020 XG5, 2020 XF5, 2020 XF4, 2020 XD1, 2020 XA5
`J044`	program code 4 via ESA Optical Ground Station (ESA OGS) in the Canary Islands, 4 in MPECs 2020-X159, 2020-X160, 2020-X161 & 2020-X167 -- 2020 XZ4, 2020 XR1, 2020 XG5, 2020 XA5
`595`	Farra d'Isonzo Obs. in Italy, 4 in MPECs 2020-X154, 2020-X156, 2020-X160 & 2020-X163 -- 2020 XW, 2020 XV4, 2020 XC5, C/2020 X2
`K83`	Forti Obs., 3 in MPEC 2020-X160 -- 2020 XX3, 2020 VC7, 2015 BF4
`E94`	Gisborne Obs. in New Zealand, 1 in MPEC 2020-X156 -- C/2020 X2
`J95`	Great Shefford Obs. in England, 1 in MPEC 2020-X156 -- C/2020 X2
`L63`	HOB Obs., 3 in MPEC 2020-X160 -- 2013 UX14, 482505, 6053
`H06\|`	Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2020-X156 -- C/2020 X2
`I89=`	program code "=" (38) via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2020-X156 -- C/2020 X2
`V01`	Mountainville Obs. in Utah, 1 in MPEC 2020-X156 -- C/2020 X2
`474`	Mt. John Obs. in New Zealand, 9 in MPECs 2020-X154, 2020-X158, 2020-X160, 2020-X163, 2020-X165, 2020-X166, 2020-X170 & 2020-X173 -- 2020 XV4, 2020 XN5, 2020 XK5, 2020 XF5, 2020 XF1, 2020 XE5, 2020 XC5, 2020 UM8, 360502
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2020-X154, 2020-X156, 2020-X158, 2020-X160, 2020-X171 & 2020-X174 -- 2020 XV4, 2020 XS5, 2020 XR, 2020 XL5, C/2020 X2, 2020 UM8
`J69`	North Obs. in England, 1 in MPEC 2020-X160 -- 2020 XF4
`Z80`	Northolt Branch Obs. in England, 5 in MPEC 2020-X160 -- 2020 XQ2, 2020 XO, 2020 XN, 2020 XC4, 2002 GZ8
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 15 in MPECs 2020-X155, 2020-X157, 2020-X159, 2020-X160, 2020-X161, 2020-X164, 2020-X165, 2020-X166, 2020-X167, 2020-X168, 2020-X170, 2020-X171, 2020-X172, 2020-X173 & 2020-X178 -- 2020 XZ4, 2020 XY4, 2020 XW4, 2020 XT5, 2020 XN5, 2020 XM5, 2020 XL5, 2020 XK5, 2020 XJ4, 2020 XG5, 2020 XF5, 2020 XE5, 2020 XD5, 2020 XA5, 2020 KK26
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 5 in MPECs 2020-X155, 2020-X156, 2020-X157, 2020-X160 & 2020-X168 -- 2020 XY4, 2020 XW4, 2020 XJ4, C/2020 X2, 2020 KK26
`K63`	Pascoli Obs. in Italy, 1 in MPEC 2020-X154 -- 2020 XV4
`B49`	Paus Obs. in Spain, 2 in MPECs 2020-X156 & 2020-X159 -- 2020 XZ4, C/2020 X2
`L47`	Piobbico Obs., 2 in MPEC 2020-X160 -- 2013 UX14, 2002 GZ8
`W16`	Pleasant Groves Obs., 1 in MPEC 2020-X160 -- 2014 XG8
`104`	San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2020-X157 & 2020-X160 -- 2020 XY4, 153201
`C95`	SATINO-1 in France, 1 in MPEC 2020-X160 -- 15817
`204`	Schiaparelli Obs. in Italy, 4 in MPECs 2020-X157, 2020-X159, 2020-X163 & 2020-X167 -- 2020 XZ4, 2020 XY4, 2020 XG5, 2020 XC5
`0331`	program code 1 via Schwarzschild Obs. in Germany, 20 in MPECs 2020-X155, 2020-X157, 2020-X159, 2020-X160 & 2020-X164 -- 2020 XZ4, 2020 XY4, 2020 XX3, 2020 XW4, 2020 XW, 2020 XV4, 2020 XS3, 2020 XP2, 2020 XN, 2020 XK, 2020 XJ3, 2020 XF4, 2020 XF3, 2020 XE4, 2020 XD5, 2020 XD3, 2020 XC1, 2020 XB1, 2020 VE6, 2018 XU3
`W883`	B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-X156 -- C/2020 X2
`L06`	Sormano2 Obs. in Italy, 1 in MPEC 2020-X156 -- C/2020 X2
`691`	Spacewatch 0.9m telescope in Arizona, 11 in MPECs 2020-X157 & 2020-X160 -- 2020 XZ2, 2020 XY4, 2020 XX3, 2020 XV2, 2020 XR, 2020 XL2, 2020 XJ2, 2020 XG1, 2020 XE3, 2020 XE2, 2012 UK171
`291`	Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2020-X160, 2020-X162 & 2020-X169 -- 2020 XK, 2020 XJ5, 2020 XB5
`L39`	Spica Obs., 1 in MPEC 2020-X156 -- C/2020 X2
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 47 in MPECs 2020-X154, 2020-X158, 2020-X159, 2020-X160, 2020-X162, 2020-X164, 2020-X167 & 2020-X174 -- 2020 XZ4, 2020 XX3, 2020 XW3, 2020 XW, 2020 XV4, 2020 XV3, 2020 XV2, 2020 XS5, 2020 XS3, 2020 XS2, 2020 XR3, 2020 XR1, 2020 XQ2, 2020 XP, 2020 XO2, 2020 XN2, 2020 XM3, 2020 XL3, 2020 XK3, 2020 XJ3, 2020 XJ2, 2020 XH4, 2020 XH3, 2020 XH2, 2020 XH1, 2020 XG5, 2020 XG1, 2020 XF4, 2020 XF1, 2020 XF, 2020 XD5, 2020 XD3, 2020 XC4, 2020 XC3, 2020 XB5, 2020 XA3, 2020 WV5, 2020 WM5, 2020 WL5, 2020 WH2, 2020 WG, 2020 WF3, 2020 WD1, 2020 WC3, 2020 VE6, 2020 UM8, 2020 SO
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-X160 -- 2020 UQ3
`L01`	Visnjan Obs. in Croatia, 18 in MPECs 2020-X153, 2020-X154, 2020-X155, 2020-X156, 2020-X157, 2020-X158, 2020-X159, 2020-X160, 2020-X161, 2020-X162, 2020-X163, 2020-X164, 2020-X167, 2020-X171, 2020-X172, 2020-X173 & 2020-X174 -- 2020 XZ4, 2020 XY4, 2020 XW4, 2020 XV4, 2020 XU4, 2020 XS5, 2020 XN5, 2020 XM5, 2020 XL5, 2020 XG5, 2020 XF4, 2020 XD5, 2020 XC5, 2020 XB5, 2020 XA5, C/2020 X2, 2020 UM8, 2020 QQ6
`G33`	Wickede Obs. in Germany, 1 in MPEC 2020-X160 -- 163902
`N88`	Xingming Obs. #3, 1 in MPEC 2020-X154 -- 2020 XV4
`I41`	Zwicky Transient Facility (ZTF) in southern California, 7 in MPECs 2020-X156 & 2020-X160 -- C/2020 X2, 2014 JH57, 31669, 152931, 143649, 7350, 2329

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

Impact Risk Monitoring on 14 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 XD5	JPL Sentry	1730	2026-2072	9	2.726e-09	-5.27	-5.44	0	JPL: Computed at 06:22 today Pacific time based on 23 observations spanning 2.8166 days (2020-Dec-11.506677 to 2020-Dec-14.32329). Diameter approximately 0.369 km. from weighted mean H=19.82.

2020 XU4	NEODyS	1730	2112-2119	5	7.54e-07	-7.88	-7.89	0	NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2020-12-12.332 to 2020-12-13.952."
2020 XU4	JPL Sentry	0530	2112-2113	2	6.7388e-07	-7.93	-7.94	0	JPL: Computed at 17:34 Dec. 13th Pacific time based on 14 observations spanning 1.6206 days (2020-Dec-12.33093 to 2020-Dec-13.951561). Diameter approximately 0.009 km. from weighted mean H=27.79.

2020 XF4	NEODyS	1900	2083-2119	17	2.74e-06	-7.19	-7.44	0	NEODyS: "Based on 53 optical observations (of which 0 are rejected as outliers) from 2020-12-05.437 to 2020-12-14.275."
2020 XF4	JPL Sentry	1730	2093-2119	11	2.54905e-06	-7.20	-7.57	0	JPL: Computed at 06:32 today Pacific time based on 53 observations spanning 8.8382 days (2020-Dec-05.43588 to 2020-Dec-14.274032). Diameter approximately 0.011 km. from weighted mean H=27.45.

2020 XX3	NEODyS	1900	2057-2120	111	5.27e-04	-5.29	-5.45	n/a	NEODyS #2 for the day: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2020-12-10.277 to 2020-12-14.198."
2020 XX3	JPL Sentry	1800	2057-2119	76	0.0004604890604	-5.34	-5.55	0	JPL #2 for the day: Computed at 09:38 today Pacific time based on 38 observations spanning 3.9203 days (2020-Dec-10.276407 to 2020-Dec-14.196741). Diameter approximately 0.007 km. from weighted mean H=28.50.

2020 XE3	NEODyS	1900	2097	1	3.9e-09	-8.58	-8.58	0	NEODyS: "Based on 19 optical observations (of which 1 are rejected as outliers) from 2020-12-06.283 to 2020-12-14.216."
2020 XE3	JPL Sentry	1730	2097-2097	1	1.166e-08	-8.13	-8.13	0	JPL: Computed at 06:17 today Pacific time based on 18 observations spanning 7.9280 days (2020-Dec-06.28728 to 2020-Dec-14.21528). Diameter approximately 0.037 km. from weighted mean H=24.83.

2020 XZ2	NEODyS	1900	R E M O V E D						-
2020 XZ2	JPL Sentry	1730	R E M O V E D						JPL: Risk listing removed at 1428 UTC today

2020 XF	NEODyS	1900	2056-2120	542	1.0e-03	-4.03	-4.22	n/a	NEODyS: "Based on 66 optical observations (of which 1 are rejected as outliers) from 2020-12-04.328 to 2020-12-14.111."
2020 XF	JPL Sentry	1730	2056-2120	129	0.00037534974	-4.50	-5.00	0	JPL: Computed at 06:24 today Pacific time based on 66 observations spanning 9.7835 days (2020-Dec-04.32683 to 2020-Dec-14.110298). Diameter approximately 0.016 km. from weighted mean H=26.66.

2020 UQ3	NEODyS	1900	2112	1	7.85e-07	-5.93	-5.93	0	NEODyS: "Based on 32 optical observations (of which 2 are rejected as outliers) from 2020-10-13.436 to 2020-12-10.275."
2020 UQ3	JPL Sentry	1730	2112-2112	1	1.614e-07	-6.59	-6.59	0	JPL: Computed at 06:00 today Pacific time based on 29 observations spanning 57.839 days (2020-Oct-13.435266 to 2020-Dec-10.274055). Diameter approximately 0.059 km. from weighted mean H=23.81.

2020 FN3	JPL Sentry	2200	R E M O V E D						JPL: Risk listing removed at 2104 UTC today
2020 FN3	NEODyS	1900	R E M O V E D						-

2017 WF30	JPL Sentry	0530	2021-2119	966	2.0019888e-06	-6.02	-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.

2015 YJ	JPL Sentry	0530	2042-2115	54	0.0015797944606	-4.12	-4.35	0	JPL: Computed at 16:10 April 9th of 2017 Pacific time based on 29 observations spanning 2.9846 days (2015-Dec-16.28791 to 2015-Dec-19.27253). Diameter approximately 0.007 km. from weighted mean H=28.28.

2015 XR169	JPL Sentry	0530	2050-2119	146	5.2294234e-05	-6.33	-7.32	0	JPL: Computed at 06:49 July 15th of 2019 Pacific time based on 32 observations spanning 6.7887 days (2015-Dec-06.468743 to 2015-Dec-13.25744). Diameter approximately 0.006 km. from weighted mean H=28.84.

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 14 December '20

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

2200	Noted that JPL Sentry has removed 2020 FN3 as an impact risk - see above Grabbed MPEC 2020-X178 - 2020 XT5 - see above
2000	Grabbed MPEC 2020-X174 - 2020 XS5 - see above Grabbed MPEC 2020-X175 - 2016 XF18 - see above Grabbed MPEC 2020-X176 - 2017 YA8 - see above Grabbed MPEC 2020-X177 - 2020 FN3 - see above
1900	Noted that NEODyS has removed 2020 FN3 as an impact risk - see above Noted that NEODyS has updated its 2020 UQ3 risk assessment - see above Noted that NEODyS has posted 2020 XE3 as an impact risk - see above Noted that NEODyS has updated its 2020 XF risk assessment - see above Noted that NEODyS has updated its 2020 XF4 risk assessment - see above Noted that NEODyS has updated its 2020 XX3 risk assessment - see above Noted that NEODyS has removed 2020 XZ2 as an impact risk - see above Grabbed MPEC 2020-X171 - 2020 XL5 - see above Grabbed MPEC 2020-X172 - 2020 XM5 - see above Grabbed MPEC 2020-X173 - 2020 XN5 - see above
1800	Noted that JPL Sentry has updated its 2020 XX3 risk assessment - see above
1730	Noted that JPL Sentry has updated its 2020 UQ3 risk assessment - see above Noted that JPL Sentry has posted 2020 XD5 as an impact risk - see above Noted that JPL Sentry has updated its 2020 XE3 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 XF4 risk assessment - see above Noted that NEODyS has posted 2020 XU4 as an impact risk - see above Noted that JPL Sentry has updated its 2020 XX3 risk assessment - see above Noted that NEODyS has updated its 2020 XX3 risk assessment - see above Noted that JPL Sentry has removed 2020 XZ2 as an impact risk - see above Grabbed MPEC 2020-X160 - Daily Orbit Update - see above Grabbed MPEC 2020-X161 - 2020 XA5 - see above Grabbed MPEC 2020-X162 - 2020 XB5 - see above Grabbed MPEC 2020-X163 - 2020 XC5 - see above Grabbed MPEC 2020-X164 - 2020 XD5 - see above Grabbed MPEC 2020-X165 - 2020 XE5 - see above Grabbed MPEC 2020-X166 - 2020 XF5 - see above Grabbed MPEC 2020-X167 - 2020 XG5 - see above Grabbed MPEC 2020-X168 - 2020 KK26 - see above Grabbed MPEC 2020-X169 - 2020 XJ5 - see above Grabbed MPEC 2020-X170 - 2020 XK5 - see above
0530	Noted that JPL Sentry has updated its 2015 XR169 risk assessment - see above Noted that JPL Sentry has updated its 2015 YJ risk assessment - see above Noted that JPL Sentry has updated its 2017 WF30 risk assessment - see above Noted that JPL Sentry has posted 2020 XU4 as an impact risk - see above Grabbed MPEC 2020-X156 - Comet C/2020 X2 (ATLAS) - see above Grabbed MPEC 2020-X157 - 2020 XY4 - see above Grabbed MPEC 2020-X158 - 2020 UM8 - see above Grabbed MPEC 2020-X159 - 2020 XZ4 - see above
0100	Grabbed MPEC 2020-X153 - 2020 XU4 - see above Grabbed MPEC 2020-X154 - 2020 XV4 - see above Grabbed MPEC 2020-X155 - 2020 XW4 - see above

http://www.HohmannTransfer.com/mn/20/20349_1214.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>.