2020-12-24 Tracking News

Contents on 24 December '20

IAU Minor Planet Center
- NEOCP Activity -- 45 listings
- New MPECs -- seventeen MPECs
Observers -- 38 observers
Impact Risk Monitoring -- twelve objects
Chronology

CHANGES COMING: The Asteroid/Comet Connection Web site will soon focus completely on Earth's Busy Neighborhood reporting. Sometime on or soon after Sunday, December 27th, much of the site will be retired.* The Tracking News will be discontinued and taken down entirely** along with its supporting timeline pages, the archives of its predecessor online publication, Major News About Minor Objects, and our even longer running Consolidated Risk Tables feature. Remaining will be Earth's Busy Neighborhood along with its sky chart, ephemerides, and some supporting pages (e.g. Observatory Links). We do plan to make the Web site easier to use, more interesting as regards close-passing asteroids, and more glitch-free while needing much, much less manual attention here than the current site. -- Webmaster

*There may be some brief chaos when we take down the old site and put up the new. Please check back.
**You can still find the old files at the Internet Archive.

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1248 risk-listed objects, 153 have had news in the last 31 days. Updated at 2204 UTC on 24 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 24 December '20

The MPC's NEO Confirmation Page has 45 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 45 objects listed. Of these, 33 were "one nighters." So far The Tracking News has counted a total of 66 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 24 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-Y107 time-stamped "05:11 UT" - 2020 YJ3 - see below
MPEC 2020-Y108 time-stamped "05:13 UT" - 2020 YK3 - see below
MPEC 2020-Y109 time-stamped "12:33 UT" - Daily Orbit Update - see below
MPEC 2020-Y110 time-stamped "14:32 UT" - 2020 YL3 - see below
MPEC 2020-Y111 time-stamped "14:34 UT" - 2020 YM3 - see below
MPEC 2020-Y112 time-stamped "15:00 UT" - 2013 JM14 - see below
MPEC 2020-Y113 time-stamped "16:41 UT" - 2020 YN3 - see below
MPEC 2020-Y114 time-stamped "20:30 UT" - 2020 YO3 - see below
MPEC 2020-Y115 time-stamped "21:12 UT" - 2020 YP3 - see below
MPEC 2020-Y116 time-stamped "21:13 UT" - 2020 YQ3 - see below
MPEC 2020-Y117 time-stamped "22:05 UT" - 2020 YR3 - see below
MPEC 2020-Y118 time-stamped "22:35 UT" - 2020 YU3 - see below
MPEC 2020-Y119 time-stamped "22:37 UT" - 2020 YV3 - see below
MPEC 2020-Y120 time-stamped "22:39 UT" - 2020 YW3 - see below
MPEC 2020-Y121 time-stamped "22:42 UT" - 2020 YX3 - see below
MPEC 2020-Y122 time-stamped "22:43 UT" - 2020 YY3 - see below
MPEC 2020-Y123 time-stamped "22:44 UT" - 2020 YZ3

MPEC 2020-Y123 - "22:44 UT" - 2020 YZ3

K20Y03Z 2020 YZ3 (small asteroid, Earth MOID=1.6 LD, H=27.76 ~10m) was picked up at 0405 UT on 22 Dec. by the Mt. Lemmon Survey (MLS), observing it at Dec. 22.17-19p4. This detection was confirmed by Steward Obs. Mt. Lemmon Station (Dec. 22.32-33p4), Pan-STARRS 1 (PS1) (Dec. 22.36-38p3), and Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Dec. 24.09p3).

MPEC 2020-Y122 - "22:43 UT" - 2020 YY3

K20Y03Y 2020 YY3 (small asteroid, Earth MOID=5.2 LD, H=26.43 ~18m) was picked up at 0724 UT on 22 Dec. by MLS, observing it at Dec. 22.31-33p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 22.41-42p4 & 24.32-33p2) and Holmes/CTIO (Dec. 23.26-27p3 & 24.25-26p3).

MPEC 2020-Y121 - "22:42 UT" - 2020 YX3

K20Y03X 2020 YX3 (small asteroid, H=25.06 ~33m) was picked up at 0627 UT on 22 Dec. by MLS, observing it at Dec. 22.27-29p4 and 22.40p3. This detection was confirmed by Holmes/CTIO (Dec. 23.22-23p3 & 24.21-22p3) and the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (Dec. 23.27-28p4).

MPEC 2020-Y120 - "22:39 UT" - 2020 YW3

K20Y03W 2020 YW3 (small asteroid, Earth MOID=7.5 LD, H=25.73 ~24m) was picked up at 0518 UT on 22 Dec. by MLS, observing it at Dec. 22.22-24p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 22.36-37p4 & 24.28-29p2), PS1 (Dec. 22.36-41p3), and Holmes/CTIO (Dec. 23.16-17p3 & 24.15-16p3).

MPEC 2020-Y119 - "22:37 UT" - 2020 YV3

K20Y03V 2020 YV3 (small asteroid, H=22.88 ~90m) was picked up at 1007 UT on 23 Dec. by PS1, observing it at Dec. 23.42-47p4 and 23.55-58p3. This detection was confirmed by MLS (Dec. 19.38-39p2) and Steward Mt. Lemmon Sta. (Dec. 24.31p2).

MPEC 2020-Y118 - "22:35 UT" - 2020 YU3

K20Y03U 2020 YU3 (small asteroid, H=23.54 ~66m) was picked up at 0737 UT on 23 Dec. by MLS, observing it at Dec. 23.32-33p3. This detection was confirmed by CSS-Kuiper (Dec. 23.40p4 & 23.48p4), Steward Mt. Lemmon Sta. (Dec. 23.46p3 & 24.25p4), and Great Shefford Obs. (Dec. 24.88-90p4).

MPEC 2020-Y117 - "22:05 UT" - 2020 YR3

K20Y03R 2020 YR3 (i=169.3°, q=16.490 AU, Q=1023.456 AU, H=9.29 ~47.0 km) was picked up at 1009 UT on 6 Dec. by the Bok Telescope, observing it at Dec. 6.42-44p4. This detection was confirmed by PS1 (2014 Dec. 29.56-60p4 at G=22.28-23.05, 2015 Jan. 27.52-55p4 at G=21.63-22.32, 2015 Feb. 13.30-31p2 at G=22.55-60, 2015 March 24.39-40p2 at G=22.27-36, 2015 Dec. 4.49p1 at G=22.36, 2016 Jan. 2.60-63p3 at G=21.71-22.24, 2016 Jan. 14.51-55p4 at G=22.09-44, 2016 Feb. 4.32-35p3 at G=22.07-62, 2016 March 4.24-27p4 at G=22.25-23.12, 2016 March 13.24-27p4 at G=22.27-72, 2016 Dec. 25.52-54p2 at G=22.23-35, 2017 Jan. 5.37p1 at G=21.86, 2017 Jan. 9.32p1 at G=22.37, 2017 Jan. 9.51p1 at G=22.53, 2017 Jan. 10.32p1 at G=21.83, 2017 Jan. 28.44-48p4 at G=22.14-42, 2017 Oct. 3.61-63p4 at G=22.05-23.09, 2017 Oct. 29.55-57p3 at G=22.28-64, 2017 Dec. 25.54-57p4 at G=22.07-30, 2018 Jan. 15.34-37p4 at G=22.08-55, 2018 Feb. 20.23-27p3 at G=21.55-22.32, 2018 Dec. 17.57-61p4 at G=21.94-22.10, 2019 Jan. 2.52-55p4 at G=21.18-22.00, 2019 Jan. 9.36-39p4 at G=21.58-22.01 & Feb. 1.34-36p4 at G=21.63-22.54), program code "&" (15) via DECam (2018 Dec. 11.29-30p2 at g=22.7-23.0 & 2018 Dec. 13.28p2 at r=22.1-4), MLS (Nov. 22.43-44p3 & Dec. 17.32-33p3), CSS-Kuiper (Dec. 17.43-45p4, 18.31-32p2 & 19.37-39p3), program code 1 via Schwarzschild Obs. (Dec. 18.06p3 at V=23.4-8), Astronomical Research Obs. Westfield (Dec. 18.27-28p3 at V=21.9-22.1), LCO McDonald Obs. B (Dec. 19.29-31p3), Sandlot Obs. (Dec. 20.18-21p2 at G=21.8-22.1), program code 7 via Discovery Channel Telescope (DCT) (Dec. 20.40-41p5), and R. Wainscoat on Mauna Kea (Dec. 22.38p3).

MPEC 2020-Y116 - "21:13 UT" - 2020 YQ3

K20Y03Q 2020 YQ3 (Earth MOID=2.8 LD, H=20.5 ~269m) was picked up at 1128 UT on 22 Dec. by the Catalina Sky Survey (CSS), observing it at Dec. 22.48-49p3. This detection was confirmed by CSS-Kuiper (Dec. 22.54p3), MLS (Dec. 22.54-55p4 & 23.49p4), Holmes/CTIO (Dec. 23.32p3 & 24.29-30p2), ATLAS Haleakala (Dec. 23.60-62p4), PS1 (Dec. 23.64p1), and Steward Mt. Lemmon Sta. (Dec. 24.45p4).

MPEC 2020-Y115 - "21:12 UT" - 2020 YP3

K20Y03P 2020 YP3 (small asteroid, H=24.1 ~51m) was picked up at 0436 UT on 22 Dec. by JPL SynTrack Robotic Telescope, observing it at Dec. 22.19-22p10. This detection was confirmed by MLS (Dec. 24.17-18p4), Steward Mt. Lemmon Sta. (Dec. 24.20-21p3), and Great Shefford Obs. (Dec. 24.83-84p3).

MPEC 2020-Y114 - "20:30 UT" - 2020 YO3

K20Y03O 2020 YO3 (Earth MOID=0.8 LD, H=24.5 ~43m) was picked up at 1349 UT on 23 Dec. by Kiso Obs., observing it at Dec. 23.52p2 and 23.58-69p12. This detection was confirmed by Galilei Obs. (Dec. 24.03-05p11), Hidetaka Sato via iTelescope Obs. Mayhill (Dec. 24.05-06p4), Steward Mt. Lemmon Sta. (Dec. 24.09p4), Wiggins Obs. (Dec. 24.12p8), Golden Ears Obs. (Dec. 24.17p3), ATLAS Haleakala (Dec. 24.32-36p8), Dave Balam via Plaskett 1.8m Telescope (Dec. 24.37p5), Schiaparelli Obs. (Dec. 24.75-77p5), Teplice Obs. (Dec. 24.77p4), and Great Shefford Obs. (Dec. 24.80p4).

MPEC 2020-Y113 - "16:41 UT" - 2020 YN3

K20Y03N 2020 YN3 (small asteroid, Earth MOID=9.6 LD, H=23.2 ~78m) was picked up at 1146 UT on 22 Dec. by Pan-STARRS 2 (PS2), observing it at Dec. 22.49-52p3. This detection was confirmed by CSS (Dec. 21.38-39p3), LCO McDonald Obs. (Dec. 23.36p3), Steward Mt. Lemmon Sta. (Dec. 23.41p4 & 24.36p3), PS1 (Dec. 23.51p1), the Spacewatch 0.9m telescope (Dec. 24.34-36p3), and ATLAS Haleakala (Dec. 24.52-53p4).

MPEC 2020-Y112 - "15:00 UT" - 2013 JM14

K13J14M 2013 JM14 (Earth MOID=8.0 LD, H=21.6 ~162m) from UH/Tholen NEO Follow-Up CFH Telescope (Dec. 22.65p3 at G=23.57-79 & 23.65p5 at G=23.48-86)

MPEC 2020-Y111 - "14:34 UT" - 2020 YM3

K20Y03M 2020 YM3 (risk listed, Earth MOID=1.2 LD, H=26.1 ~20m, close passer) was picked up at 1039 UT on 22 Dec. by MLS, observing it at Dec. 22.44-46p4. This detection was confirmed by PS1 (Dec. 11.57-58p2), Steward Mt. Lemmon Sta. (Dec. 22.53-54p3, 23.41p4 & 24.44p2), PS2 (Dec. 22.58-60p3), Holmes/CTIO (Dec. 24.26-28p3), and the Spacewatch 1.8m telescope (Dec. 24.39-40p2).

MPEC 2020-Y110 - "14:32 UT" - 2020 YL3

K20Y03L 2020 YL3 (small asteroid, H=23.4 ~71m) was picked up at 0657 UT on 22 Dec. by MLS, observing it at Dec. 8.37p2 at G=22.3 and 22.29-31p4 at G=20.81-21.59. This detection was confirmed by PS1 (Nov. 10.50-51p2 at G=22.65-83 & Dec. 4.50-52p2 at G=21.62-22.06), Spacewatch 0.9m (Dec. 22.34-37p3), CSS-Kuiper (Dec. 22.42p4), Holmes/CTIO (Dec. 23.29-30p3 & 24.17-18p3), and Steward Mt. Lemmon Sta. (Dec. 24.35p2).

<< DOU on 24 December '20 >> MPEC 2020-Y109 - "12:33 UT" - Daily Orbit Update

Observations of risk-listed objects
K20Y03C 2020 YC3 (arc=2 days, H=20.2 ~309m) from Holmes/CTIO (Dec. 23.24-25p3)
K20Y02S 2020 YS2 (small asteroid, arc=3 days, H=31.0 ~2m, close passer, NHATS target) from Steward Mt. Lemmon Sta. (Dec. 24.37p3)
K20Y01L 2020 YL1 (i=48.9°, arc=5 days, H=20.4 ~282m) from Steward Mt. Lemmon Sta. (Dec. 23.52p4 & 24.36p3) and Spacewatch via Kitt Peak Natl. Obs. (KPNO) (Dec. 24.40p2)
K20Y01A 2020 YA1 (small asteroid, arc=7 days, H=26.7 ~15m, close passer, NHATS target) from Steward Mt. Lemmon Sta. (Dec. 24.41p3)
K20X00F 2020 XF (small asteroid, arc=19 days, H=26.7 ~15m, close passer, NHATS target) from Spacewatch 1.8m (Dec. 24.16-18p2)
K20V00V 2020 VV (small asteroid, arc=61 days, H=27.2 ~12m, close passer, NHATS target) from Marco Micheli via Cerro Paranal (Dec. 4.07p3 at G=23.8-24.1)
99942 99942 Apophis (2004 MN4) (NHATS target) from the Zwicky Transient Facility (ZTF) (Dec. 17.44p1, 17.52p1, 21.42p1 & 21.46p1) and ATLAS Haleakala (Dec. 23.58-59p4)
Observations of recently (no longer) risk-listed objects
K20Y02R 2020 YR2 (small asteroid, arc=3 days, H=28.3 ~7m, close passer, NHATS target) from Spacewatch/KPNO (Dec. 24.40p2)
K20Y01E 2020 YE1 (almost small, Q=4.290 AU, arc=5 days, H=21.8 ~148m) from Steward Mt. Lemmon Sta. (Dec. 23.54p4)
K20X06E 2020 XE6 (arc=11 days, H=19.9 ~355m) from CSS-Kuiper (Dec. 23.51p2)
K20X02V 2020 XV2 (small asteroid, Q=4.586 AU, arc=15 days, H=23.4 ~71m) from Holmes/CTIO (Dec. 23.25-26p3) and Steward Mt. Lemmon Sta. (Dec. 24.38p4)
K20X00R 2020 XR (Q=4.026 AU, arc=3 opp, H=19.7 ~389m) from Spacewatch 1.8m (Dec. 24.13-14p2)
K20W05U 2020 WU5 (i=41.5°, arc=23 days, H=18.8 ~589m) from ATLAS Haleakala (Dec. 22.50-52p4)
Observations of close-passing objects
K20X04C 2020 XC4 (arc=15 days, H=26.0 ~21m, NHATS target) from ARO Westfield (Dec. 23.02-03p3) and Spacewatch/KPNO (Dec. 24.22p3)
K20X01H 2020 XH1 (arc=17 days, H=22.9 ~89m) from MLS (Dec. 23.35-37p4)
K20X00H 2020 XH (arc=20 days, H=24.5 ~43m) from Steward Mt. Lemmon Sta. (Dec. 24.46-47p3)
K20W05W 2020 WW5 (arc=34 days, H=28.7 ~6m, NHATS target) from Spacewatch 1.8m (Dec. 24.33p2)
K12UH1K 2012 UK171 (arc=3 opp, H=24.4 ~45m, NHATS target) from Tacande Obs. (Dec. 22.97-98p3) and ATLAS Haleakala (Dec. 23.37-38p3)
Observation campaigns (NHATS targets, radar support)
K20Y03B 2020 YB3 (arc=2 days, H=26.7 ~15m, NHATS) from Holmes/CTIO (Dec. 23.28p2)
K20X00W 2020 XW (arc=18 days, H=24.7 ~39m, NHATS) from ARO Westfield (Dec. 23.05p3)
K20W03Q 2020 WQ3 (arc=45 days, H=25.8 ~23m, NHATS) from PS1 (Dec. 23.55-59p4)
K20T08J 2020 TJ8 (arc=70 days, H=24.9 ~35m, NHATS) from PS1 (Dec. 23.55-59p4)
K20T01Z 2020 TZ1 (arc=77 days, H=24.2 ~49m, NHATS) from Spacewatch/KPNO (Dec. 24.18-21p3)
K13Y02S 2013 YS2 (arc=2 opp, H=23.6 ~65m, NHATS) from ATLAS Mauna Loa (Dec. 22.37-40p4), ATLAS Haleakala (Dec. 23.34-36p6), and MLS (Dec. 23.35-37p4)
04179 4179 Toutatis (1989 AC) (radar) from ATLAS Haleakala (Dec. 23.20-22p4)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20Y02Z 2020 YZ2 (arc=3 days, H=24.4 ~45m) from Steward Mt. Lemmon Sta. (Dec. 24.39-40p2)
K20Y02Y 2020 YY2 (arc=3 days, H=22.4 ~112m) from Steward Mt. Lemmon Sta. (Dec. 24.07p4)
K20Y01R 2020 YR1 (arc=5 days, H=22.8 ~93m) from Steward Mt. Lemmon Sta. (Dec. 23.49p3 & 24.48p3)
K20Y01O 2020 YO1 (arc=5 days, H=25.6 ~26m) from Steward Mt. Lemmon Sta. (Dec. 24.42-45p3)
K20Y00D 2020 YD (arc=8 days, H=25.0 ~34m) from Steward Mt. Lemmon Sta. (Dec. 24.12p2)
K20X06Z 2020 XZ6 (arc=8 days, H=24.1 ~51m) from Steward Mt. Lemmon Sta. (Dec. 23.50-52p3)
K20X05B 2020 XB5 (arc=14 days, H=23.8 ~59m) from Holmes/CTIO (Dec. 23.22-24p3)
K20X03F 2020 XF3 (arc=14 days, H=25.6 ~26m) from Steward Mt. Lemmon Sta. (Dec. 23.53p4)
K20X03C 2020 XC3 (arc=15 days, H=22.4 ~112m) from ARO Westfield (Dec. 23.00-01p4) and Steward Mt. Lemmon Sta. (Dec. 24.11-12p4)
K20X02P 2020 XP2 (arc=15 days, H=22.1 ~129m) from ATLAS Mauna Loa (Dec. 22.56-58p6)
K20X00U 2020 XU (arc=19 days, H=22.9 ~89m) from Spacewatch 1.8m (Dec. 24.24-25p3)
K20W05T 2020 WT5 (arc=23 days, H=22.1 ~129m) from Holmes/CTIO (Dec. 23.18-20p3)
K20W01Q 2020 WQ1 (arc=39 days, H=22.8 ~93m) from Holmes/CTIO (Dec. 23.33-34p3)
K20V07C 2020 VC7 (arc=48 days, H=24.1 ~51m) from ATLAS Mauna Loa (Dec. 23.44-47p4)
K20V01K 2020 VK1 (arc=46 days, H=23.9 ~56m) from Spacewatch/KPNO (Dec. 24.08-09p2)
K20T07E 2020 TE7 (arc=70 days, H=23.9 ~56m) from CSS-Kuiper (Dec. 23.51-52p4 at G=21.18-22.12)
K20Q05D 2020 QD5 (Q=4.347 AU, arc=130 days, H=23.2 ~78m) from CSS-Kuiper (Dec. 23.49-50p4)
K19Y05P 2019 YP5 (arc=2 opp, H=22.4 ~112m) from Spacewatch 1.8m (Dec. 23.45-47p2)
K12XD3E 2012 XE133 (arc=2 opp, H=23.3 ~74m) from ATLAS Mauna Loa (Dec. 23.40-42p4)
K11G65O 2011 GO65 (arc=56 days, H=22.9 ~89m) from PS1 (2011 March 26.54-57p5)
K11B12A 2011 BA12 (arc=100 days, H=22.5 ~107m) from PS1 (2011 Jan. 24.55-56p2)
K11A24L 2011 AL24 (arc=34 days, H=22.3 ~117m) from PS1 (2011 Feb. 10.47-49p2 & 2011 Feb. 14.52-54p3)
K02RC9S 2002 RS129 (arc=3 opp, H=22.8 ~93m) from Spacewatch/KPNO (Dec. 24.23-25p3)
K20W00G 2020 WG (Q=4.016 AU, arc=37 days, H=21.8 ~148m) from PS1 (Dec. 23.33-35p3)
K20T04M 2020 TM4 (Q=4.139 AU, arc=72 days, H=21.8 ~148m) from PS1 (Dec. 23.54-59p4)
K20T03P 2020 TP3 (arc=85 days, H=22.0 ~135m) from Holmes/CTIO (Dec. 23.15-17p3 at G=22.5-6)
K16Y00M 2016 YM (arc=3 opp, H=22.0 ~135m) from ATLAS Haleakala (Dec. 23.45-48p3)
Observations of other objects
K20X05C 2020 XC5 (Q=4.115 AU, arc=11 days, H=20.9 ~224m) from Holmes/CTIO (Dec. 23.16-17p3)
K20X04T 2020 XT4 (arc=15 days, H=21.1 ~204m) from Holmes/CTIO (Dec. 23.22-23p3)
K20X04D 2020 XD4 (i=38.9°, arc=14 days, H=20.2 ~309m) from Holmes/CTIO (Dec. 23.19-21p3 at G=22.1-2)
K20X03L 2020 XL3 (arc=14 days, H=21.2 ~195m) from MLS (Dec. 23.30-31p3)
K20X01N 2020 XN1 (i=36.8°, Q=4.001 AU, arc=36 days, H=19.6 ~407m) from ATLAS Mauna Loa (Dec. 22.40-43p4), ARO Westfield (Dec. 23.14-15p3), and Spacewatch 0.9m (Dec. 24.12-13p3)
K20W05S 2020 WS5 (i=40.9°, Q=4.060 AU, arc=26 days, H=20.8 ~234m) from ARO Westfield (Dec. 23.17p3) and ATLAS Mauna Loa (Dec. 23.32-33p4)
K20W05M 2020 WM5 (Q=4.827 AU, arc=26 days, H=20.4 ~282m) from CSS (Dec. 23.31-33p4), ATLAS Mauna Loa (Dec. 23.49-51p4), and Steward Mt. Lemmon Sta. (Dec. 24.40p2)
K20W05A 2020 WA5 (arc=28 days, H=21.6 ~162m) from CSS (Dec. 23.32-33p4) and ATLAS Mauna Loa (Dec. 23.51-52p4)
K20W01L 2020 WL1 (arc=37 days, H=19.9 ~355m) from PS2 (Dec. 23.49-52p4)
K20V06Q 2020 VQ6 (arc=38 days, H=21.2 ~195m) from ATLAS Mauna Loa (Dec. 22.40-44p4) and ARO Westfield (Dec. 23.15-16p3)
K20V03M 2020 VM3 (arc=43 days, H=20.7 ~245m) from PS2 (Dec. 23.43-47p4)
K20T04G 2020 TG4 (Q=4.171 AU, arc=96 days, H=19.9 ~355m) from ATLAS Mauna Loa (Dec. 22.36-42p6), ARO Westfield (Dec. 23.18-19p6), ATLAS Haleakala (Dec. 23.37-38p4), and Spacewatch 0.9m (Dec. 24.15-17p3)
K20M03Z 2020 MZ3 (Q=4.359 AU, arc=207 days, H=20.0 ~339m) from PS2 (Dec. 23.49-50p2)
K20L03D 2020 LD3 (arc=2 opp, H=20.5 ~269m) from PS2 (Dec. 22.53-57p4)
K19A06P 2019 AP6 (arc=2 opp, H=21.1 ~204m) from CSS-Kuiper (Dec. 23.52-53p3)
K18K02M 2018 KM2 (arc=3 opp, H=20.3 ~295m) from MLS (Dec. 23.39-41p4)
K18G05V 2018 GV5 (arc=2 opp, H=19.9 ~355m) from PS1 (Dec. 23.26-29p4)
K17X62H 2017 XH62 (arc=3 opp, H=20.1 ~323m) from MLS (Dec. 23.32-33p4)
K17G06O 2017 GO6 (Q=4.121 AU, arc=2 opp, H=19.3 ~467m) from MLS (Dec. 23.09-10p3)
K17B31L 2017 BL31 (q=0.370 AU, Q=4.566 AU, arc=3 opp, H=19.2 ~490m) from MLS (Dec. 23.40-41p3) and Spacewatch 0.9m (Dec. 24.25-27p3)
K17A05F 2017 AF5 (q=0.124 AU, Q=4.833 AU, arc=4 opp, H=17.7 ~977m) from Spacewatch 0.9m (Dec. 24.36-37p2)
K16W10G 2016 WG10 (Q=4.152 AU, arc=3 opp, H=20.8 ~234m) from ATLAS Mauna Loa (Dec. 23.37p3 & 23.43-46p2)
K16E85D 2016 ED85 (Q=5.062 AU, arc=3 opp, H=17.7 ~977m) from ATLAS Haleakala (Dec. 23.63-66p4)
K16E84L 2016 EL84 (arc=4 opp, H=19.8 ~371m) from PS1 (Dec. 23.55-57p3)
K16C32B 2016 CB32 (Q=4.713 AU, arc=3 opp, H=18.7 ~616m) from PS2 (Dec. 23.50-52p3)
K16B14P 2016 BP14 (Q=5.068 AU, arc=3 opp, H=21.1 ~204m) from PS1 (Dec. 23.60-62p3)
K15O00H 2015 OH (arc=3 opp, H=19.9 ~355m) from PS2 (Dec. 23.58-61p3)
K15B04F 2015 BF4 (arc=6 opp, H=20.5 ~269m) from ATLAS Haleakala (Dec. 23.27-29p4)
K13U14X 2013 UX14 (arc=4 opp, H=18.3 ~741m) from ATLAS Mauna Loa (Dec. 23.34-37p4)
K11S03F 2011 SF3 (Q=4.342 AU, arc=2 opp, H=20.7 ~245m) from PS1 (Dec. 23.37-39p3)
K10MB1U 2010 MU111 (i=41.5°, arc=3 opp, H=18.3 ~741m) from PS1 (Dec. 23.54-58p3)
K03Y00J 2003 YJ (arc=4 opp, H=20.4 ~282m) from ATLAS Haleakala (Dec. 23.25-26p4)
K03U05B 2003 UB5 (Q=4.176 AU, arc=3 opp, H=19.3 ~467m) from NEOWISE (Dec. 21.52p1, 21.65p1 & 21.78p1)
K03B47K 2003 BK47 (Q=4.689 AU, arc=5 opp, H=17.8 ~933m) from ATLAS Haleakala (Dec. 23.49-51p4)
K02G08Z 2002 GZ8 (Q=4.633 AU, arc=4 opp, H=18.7 ~616m) from CSS (Dec. 23.40-42p4)
K01Y03V 2001 YV3 (arc=3 opp, H=20.6 ~257m) from ATLAS Mauna Loa (Dec. 22.50-54p4) and Spacewatch 0.9m (Dec. 24.18-20p3)
J99V15X 1999 VX15 (Q=4.807 AU, arc=2 opp, H=18.7 ~616m) from ATLAS Haleakala (Dec. 22.48-53p4 & 23.40-42p4)
p3125 513125 1997 GC32 from PS2 (Dec. 23.35-37p3)
p2245 512245 2016 AU8 from PS2 (Dec. 23.62-64p3)
p0073 510073 2010 JF88 from PS2 (Dec. 23.34-37p4)
o6779 506779 2006 YY2 from ATLAS Haleakala (Dec. 23.33-35p7)
o6459 506459 2002 AL14 from ATLAS Haleakala (Dec. 23.59-61p4)
o5093 505093 2011 VQ5 from ATLAS Mauna Loa (Dec. 23.44-47p4)
n7094 497094 2004 AH from MLS (Dec. 23.43-45p4) and ATLAS Haleakala (Dec. 23.49-50p4)
m4199 484199 2006 WS1 from PS1 (Dec. 23.49-53p7)
m3468 483468 2002 JY8 from PS1 (Dec. 23.37-39p3)
l1241 471241 2011 BX18 from PS2 (Dec. 23.61-64p3)
k7963 467963 2012 JT17 from PS2 (Dec. 23.34-38p3)
k5749 465749 2009 WO6 from CSS (Dec. 23.34-35p4) and ATLAS Mauna Loa (Dec. 23.52-53p4)
j9386 459386 2012 KJ11 from MLS (Dec. 23.08-10p4)
j5185 455185 2000 EB107 from PS2 (Dec. 23.54-56p3)
h8902 438902 2009 WF104 from CSS (Dec. 23.29-31p3) and ATLAS Mauna Loa (Dec. 23.45-47p4)
h5404 435404 2008 AT28 from ATLAS Haleakala (Dec. 23.42-43p4)
h4632 434632 2005 WE from PS2 (Dec. 23.57-61p4)
g8086 428086 2006 NM from PS1 (Dec. 23.32-35p4)
f8416 418416 2008 LV16 from MLS (Dec. 23.41-43p4)
f7201 417201 2005 XM4 from CSS (Dec. 23.40-42p3)
f6694 416694 2004 YR32 from ATLAS Mauna Loa (Dec. 22.51-55p4), CSS (Dec. 23.34-35p4), and PS1 (Dec. 23.50-52p3)
f5029 415029 2011 UL21 from ATLAS Mauna Loa (Dec. 23.38-40p4)
c6504 386504 2009 BP58 from PS1 (Dec. 23.49-53p4)
c0359 380359 2002 TN30 from CSS (Dec. 23.43-44p4) and ATLAS Mauna Loa (Dec. 23.56-58p4)
c0128 380128 1997 WB21 from MLS (Dec. 23.30-31p4)
b3579 373579 2002 AW11 from ATLAS Haleakala (Dec. 23.29-30p4)
a3305 363305 2002 NV16 from PS1 (Dec. 23.59-63p4 at w=21.8-22.3)
S3729 283729 2002 UX from ATLAS Haleakala (Dec. 23.40-41p4)
R6409 276409 2002 YN2 from CSS (Dec. 23.40-42p4)
O1596 241596 1998 XM2 from ATLAS Haleakala (Dec. 23.35-37p4)
L6707 216707 2004 XP164 from ATLAS Haleakala (Dec. 23.52-53p4)
J9003 199003 2005 WJ56 from PS1 (Dec. 24.21-25p4)
J0208 190208 2006 AQ from ATLAS Haleakala (Dec. 23.58-60p4) and PS2 (Dec. 23.62-65p4)
I9040 189040 2000 MU1 from ATLAS Haleakala (Dec. 23.49-51p4) and PS2 (Dec. 23.54-56p4)
I6822 186822 2004 FE31 from ATLAS Haleakala (Dec. 23.25-26p4)
G4216 164216 2004 OT11 from ARO Westfield (Dec. 21.00-02p3 at V=22.1-5)
G3902 163902 2003 SW222 from ATLAS Mauna Loa (Dec. 23.34-37p4)
G3014 163014 2001 UA5 from ATLAS Haleakala (Dec. 23.21-26p4)
G2039 162039 1996 JG from ATLAS Mauna Loa (Dec. 23.39-41p4)
F9923 159923 2004 YJ32 from PS2 (Dec. 23.49-52p4)
F9402 159402 1999 AP10 from CSS (Dec. 23.32-33p3), ATLAS Mauna Loa (Dec. 23.51-52p4), and PS1 (Dec. 23.54-58p4)
F4347 154347 2002 XK4 from PS2 (Dec. 23.62-65p4)
F2679 152679 1998 KU2 from PS1 (Dec. 23.60-63p4)
E1079 141079 2001 XS30 from ATLAS Haleakala (Dec. 23.40-41p4)
E1053 141053 2001 XT1 from PS2 (Dec. 23.49-53p4)
D8095 138095 2000 DK79 from ATLAS Haleakala (Dec. 23.20-22p4)
99935 99935 2002 AV4 from CSS (Dec. 23.36-38p4)
99799 99799 2002 LJ3 from PS2 (Dec. 23.62-65p3)
96315 96315 1997 AP10 from MLS (Dec. 23.30-31p4)
90147 90147 2002 YK14 from CSS (Dec. 23.23-24p4), PS2 (Dec. 23.39-43p4), ATLAS Mauna Loa (Dec. 23.42-44p3), and Golden Ears Obs. (Dec. 24.22-23p3)
88188 88188 2000 XH44 from MLS (Dec. 23.27-29p4), ATLAS Mauna Loa (Dec. 23.42-43p5), and PS2 (Dec. 23.42-43p2)
85275 85275 1994 LY from ATLAS Haleakala (Dec. 23.27-28p4)
66272 66272 1999 JW6 from CSS (Dec. 23.10-12p3) and ATLAS Mauna Loa (Dec. 23.27-28p3)
65717 65717 1993 BX3 from ATLAS Haleakala (Dec. 22.35-37p4 & 22.45p1)
53435 53435 1999 VM40 from CSS (Dec. 23.31-33p4) and ATLAS Mauna Loa (Dec. 23.49-51p4)
53430 53430 1999 TY16 from PS1 (Dec. 24.23-26p3)
31346 31346 1998 PB1 from PS1 (Dec. 23.60-63p4)
27346 27346 2000 DN8 from SATINO-1 (2019 May 29.96-98p3)
23183 23183 2000 OY21 from MLS (Dec. 23.53-54p4)
21374 21374 1997 WS22 from CSS (Dec. 23.27-31p8) and ATLAS Mauna Loa (Dec. 23.48-50p4)
09856 9856 1991 EE from PS2 (Dec. 23.57-60p3)
08567 8567 1996 HW1 from ATLAS Haleakala (Dec. 23.50-51p4)
08037 8037 1993 HO1 from ATLAS Haleakala (Dec. 23.60-62p4)
06053 6053 1993 BW3 from PS1 (Dec. 24.21-25p4)
05836 5836 1993 MF from ATLAS Haleakala (Dec. 23.32-34p4)
05587 5587 1990 SB from ATLAS Haleakala (Dec. 23.25-26p3)
04055 4055 Magellan (1985 DO2) from ATLAS Haleakala (Dec. 23.25-26p4)
03552 3552 Don Quixote (1983 SA) from PS2 (Dec. 23.44-48p4)
03551 3551 Verenia (1983 RD) from PS1 (Dec. 23.60-63p3)
03199 3199 Nefertiti (1982 RA) from ATLAS Haleakala (Dec. 23.60-62p4)
03122 3122 Florence (1981 ET3) from ATLAS Haleakala (Dec. 23.59-61p4)
01981 1981 Midas (1973 EA) from ATLAS Haleakala (Dec. 23.20-22p4)
01943 1943 Anteros (1973 EC) from ATLAS Haleakala (Dec. 23.64-67p4)
01863 1863 Antinous (1948 EA) from PS1 (Dec. 23.31-35p4)
01685 1685 Toro (1948 OA) from ATLAS Haleakala (Dec. 23.64-65p4)
01036 1036 Ganymed (1924 TD) from ATLAS Haleakala (Dec. 23.42-44p4)
00887 887 Alinda (1918 DB) from ATLAS Haleakala (Dec. 23.23-29p3)
00719 719 Albert (1911 MT) from PS1 (Dec. 23.60-63p4 at w=22.4-7)
00433 433 Eros (1898 DQ) from ATLAS Haleakala (Dec. 23.64-67p4)

MPEC 2020-Y108 - "05:13 UT" - 2020 YK3

K20Y03K 2020 YK3 (risk listed, Earth MOID=2.7 LD, H=27.16 ~13m, close passer, NHATS target) was picked up at 0444 UT on 22 Dec. by MLS, observing it at Dec. 22.20-21p3. This detection was confirmed by Tebbutt Obs. (Dec. 22.29-32p3), Steward Mt. Lemmon Sta. (Dec. 22.34p4 & 24.17-18p3), ARO Westfield (Dec. 23.09-10p3), and Holmes/CTIO (Dec. 24.11-12p3).

MPEC 2020-Y107 - "05:11 UT" - 2020 YJ3

K20Y03J 2020 YJ3 (small asteroid, H=25.50 ~27m) was picked up at 0342 UT on 21 Dec. by MLS, observing it at Dec. 21.15-17p4 and 22.22p3. This detection was confirmed by PS1 (Nov. 5.26-29p3 at G=22.39-57), PS2 (Dec. 6.31-34p3 at G=21.81-22.61), CSS-Kuiper (Dec. 21.28-29p4 at G=20.95-22.29), and Holmes/CTIO (Dec. 22.14p4 & 24.13-14p3).

Observers on 24 December '20

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

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2020-Y108, 2020-Y109 & 2020-Y117 -- 2020 YR3, 2020 YK3, 2020 XW, 2020 XN1, 2020 XC4, 2020 XC3, 2020 WS5, 2020 VQ6, 2020 TG4, 164216
`T05`	ATLAS Haleakala in Hawaii, 44 in MPECs 2020-Y109, 2020-Y113, 2020-Y114 & 2020-Y116 -- 2020 YQ3, 2020 YO3, 2020 YN3, 2020 WU5, 2020 TG4, 2016 YM, 2016 ED85, 2015 BF4, 2013 YS2, 2012 UK171, 2003 YJ, 2003 BK47, 1999 VX15, 99942, 85275, 65717, 506779, 506459, 497094, 435404, 373579, 283729, 241596, 216707, 190208, 189040, 186822, 163014, 141079, 138095, 8567, 8037, 5836, 5587, 4179, 4055, 3199, 3122, 1981, 1943, 1685, 1036, 887, 433
`T08`	ATLAS Mauna Loa in Hawaii, 27 in MPEC 2020-Y109 -- 2020 XP2, 2020 XN1, 2020 WS5, 2020 WM5, 2020 WA5, 2020 VQ6, 2020 VC7, 2020 TG4, 2016 WG10, 2013 YS2, 2013 UX14, 2012 XE133, 2001 YV3, 90147, 88188, 66272, 53435, 505093, 465749, 438902, 416694, 415029, 380359, 21374, 163902, 162039, 159402
`V00`	Bok Telescope in Arizona, 1 in MPEC 2020-Y117 -- 2020 YR3
`703`	Catalina Sky Survey (CSS) in Arizona, 17 in MPECs 2020-Y109, 2020-Y113 & 2020-Y116 -- 2020 YQ3, 2020 YN3, 2020 WM5, 2020 WA5, 2002 GZ8, 99935, 90147, 66272, 53435, 465749, 438902, 417201, 416694, 380359, 276409, 21374, 159402
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 10 in MPECs 2020-Y107, 2020-Y109, 2020-Y110, 2020-Y116, 2020-Y117, 2020-Y118 & 2020-Y121 -- 2020 YX3, 2020 YU3, 2020 YR3, 2020 YQ3, 2020 YL3, 2020 YJ3, 2020 XE6, 2020 TE7, 2020 QD5, 2019 AP6
`309&`	Marco Micheli via Cerro Paranal in Chile, 1 in MPEC 2020-Y109 -- 2020 VV
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 19 in MPECs 2020-Y107, 2020-Y108, 2020-Y109, 2020-Y110, 2020-Y111, 2020-Y116, 2020-Y120, 2020-Y121, 2020-Y122 & 2020-Y123 -- 2020 YZ3, 2020 YY3, 2020 YX3, 2020 YW3, 2020 YQ3, 2020 YM3, 2020 YL3, 2020 YK3, 2020 YJ3, 2020 YC3, 2020 YB3, 2020 XV2, 2020 XT4, 2020 XD4, 2020 XC5, 2020 XB5, 2020 WT5, 2020 WQ1, 2020 TP3
`W84&`	program code "&" (15) via DECam in Chile, 1 in MPEC 2020-Y117 -- 2020 YR3
`G377`	program code 7 via Discovery Channel Telescope in Arizona, 1 in MPEC 2020-Y117 -- 2020 YR3
`X31`	Galilei Obs., 1 in MPEC 2020-Y114 -- 2020 YO3
`U55`	Golden Ears Obs., 2 in MPECs 2020-Y109 & 2020-Y114 -- 2020 YO3, 90147
`J95`	Great Shefford Obs. in England, 3 in MPECs 2020-Y114, 2020-Y115 & 2020-Y118 -- 2020 YU3, 2020 YP3, 2020 YO3
`H06\|`	Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2020-Y114 -- 2020 YO3
`U68`	JPL SynTrack Robotic Telescope, 1 in MPEC 2020-Y115 -- 2020 YP3
`381`	Kiso Obs. in Japan, 1 in MPEC 2020-Y114 -- 2020 YO3
`695^`	Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 6 in MPEC 2020-Y109 -- 2020 YR2, 2020 YL1, 2020 XC4, 2020 VK1, 2020 TZ1, 2002 RS129
`V37`	LCO McDonald Obs. in Texas, 1 in MPEC 2020-Y113 -- 2020 YN3
`V39`	LCO McDonald Obs. B in Texas, 1 in MPEC 2020-Y117 -- 2020 YR3
`568^`	R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2020-Y117 -- 2020 YR3
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 27 in MPECs 2020-Y107, 2020-Y108, 2020-Y109, 2020-Y110, 2020-Y111, 2020-Y115, 2020-Y116, 2020-Y117, 2020-Y118, 2020-Y119, 2020-Y120, 2020-Y121, 2020-Y122 & 2020-Y123 -- 2020 YZ3, 2020 YY3, 2020 YX3, 2020 YW3, 2020 YV3, 2020 YU3, 2020 YR3, 2020 YQ3, 2020 YP3, 2020 YM3, 2020 YL3, 2020 YK3, 2020 YJ3, 2020 XL3, 2020 XH1, 2018 KM2, 2017 XH62, 2017 GO6, 2017 BL31, 2013 YS2, 96315, 88188, 497094, 459386, 418416, 380128, 23183
`C51`	NEOWISE in Earth polar orbit, 1 in MPEC 2020-Y109 -- 2003 UB5
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 36 in MPECs 2020-Y107, 2020-Y109, 2020-Y110, 2020-Y111, 2020-Y113, 2020-Y116, 2020-Y117, 2020-Y119, 2020-Y120 & 2020-Y123 -- 2020 YZ3, 2020 YW3, 2020 YV3, 2020 YR3, 2020 YQ3, 2020 YN3, 2020 YM3, 2020 YL3, 2020 YJ3, 2020 WQ3, 2020 WG, 2020 TM4, 2020 TJ8, 2018 GV5, 2016 EL84, 2016 BP14, 2011 SF3, 2011 GO65, 2011 BA12, 2011 AL24, 2010 MU111, 53430, 484199, 483468, 428086, 416694, 386504, 363305, 31346, 199003, 159402, 152679, 6053, 3551, 1863, 719
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 26 in MPECs 2020-Y107, 2020-Y109, 2020-Y111 & 2020-Y113 -- 2020 YN3, 2020 YM3, 2020 YJ3, 2020 WL1, 2020 VM3, 2020 MZ3, 2020 LD3, 2016 CB32, 2015 OH, 99799, 90147, 88188, 513125, 512245, 510073, 471241, 467963, 455185, 434632, 190208, 189040, 159923, 154347, 141053, 9856, 3552
`6581`	Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2020-Y114 -- 2020 YO3
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2020-Y117 -- 2020 YR3
`C95`	SATINO-1 in France, 1 in MPEC 2020-Y109 -- 27346
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2020-Y114 -- 2020 YO3
`0331`	program code 1 via Schwarzschild Obs. in Germany, 1 in MPEC 2020-Y117 -- 2020 YR3
`691`	Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2020-Y109, 2020-Y110 & 2020-Y113 -- 2020 YN3, 2020 YL3, 2020 XN1, 2020 TG4, 2017 BL31, 2017 AF5, 2001 YV3
`291`	Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2020-Y109 & 2020-Y111 -- 2020 YM3, 2020 XU, 2020 XR, 2020 XF, 2020 WW5, 2019 YP5
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 27 in MPECs 2020-Y108, 2020-Y109, 2020-Y110, 2020-Y111, 2020-Y113, 2020-Y114, 2020-Y115, 2020-Y116, 2020-Y118, 2020-Y119, 2020-Y120, 2020-Y122 & 2020-Y123 -- 2020 YZ3, 2020 YZ2, 2020 YY3, 2020 YY2, 2020 YW3, 2020 YV3, 2020 YU3, 2020 YS2, 2020 YR1, 2020 YQ3, 2020 YP3, 2020 YO3, 2020 YO1, 2020 YN3, 2020 YM3, 2020 YL3, 2020 YL1, 2020 YK3, 2020 YE1, 2020 YD, 2020 YA1, 2020 XZ6, 2020 XV2, 2020 XH, 2020 XF3, 2020 XC3, 2020 WM5
`J22`	Tacande Obs. in the Canary Islands, 1 in MPEC 2020-Y109 -- 2012 UK171
`858`	Tebbutt Obs. in New Mexico, 1 in MPEC 2020-Y108 -- 2020 YK3
`K62`	Teplice Obs. in the Czech Republic, 1 in MPEC 2020-Y114 -- 2020 YO3
`T14`	UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2020-Y112 -- 2013 JM14
`718`	Wiggins Obs. in Utah, 1 in MPEC 2020-Y114 -- 2020 YO3
`I41`	Zwicky Transient Facility in southern California, 1 in MPEC 2020-Y109 -- 99942

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

Impact Risk Monitoring on 24 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 YM3	NEODyS	2201	2118	1	1.99e-08	-8.75	-8.75	0	NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2020-12-11.568 to 2020-12-24.443."

2020 YK3	JPL Sentry	1810	2042-2113	24	1.91059877e-05	-6.00	-6.32	0	JPL: Computed at 22:45 Dec. 23rd Pacific time based on 19 observations spanning 1.9843 days (2020-Dec-22.1975 to 2020-Dec-24.181831). Diameter approximately 0.013 km. from weighted mean H=27.11.
2020 YK3	NEODyS	1810	2062-2120	17	1.41e-06	-7.25	-7.76	n/a	NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2020-12-22.198 to 2020-12-24.183."

2020 YC3	NEODyS	2201	2025-2120	70	1.02e-07	-4.55	-5.13	n/a	NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2020-12-21.273 to 2020-12-23.285."
2020 YC3	JPL Sentry	1810	2025-2120	79	1.405579e-07	-4.28	-5.12	0	JPL: Computed at 06:58 today Pacific time based on 24 observations spanning 2.0123 days (2020-Dec-21.271836 to 2020-Dec-23.2841). Diameter approximately 0.327 km. from weighted mean H=20.08.

2020 YS2	NEODyS	2200	R E M O V E D						-
2020 YS2	JPL Sentry	1810	2093-2093	1	5.187e-07	-9.57	-9.57	0	JPL: Computed at 06:55 today Pacific time based on 21 observations spanning 2.9133 days (2020-Dec-21.459571 to 2020-Dec-24.372867). Diameter approximately 0.002 km. from weighted mean H=31.00.

2020 YM1	JPL Sentry	1810	2091-2119	18	7.399411e-05	-6.80	-7.15	0	JPL: Computed at 06:56 Dec. 21st Pacific time based on 15 observations spanning 1.7688 days (2020-Dec-19.434187 to 2020-Dec-21.20299). Diameter approximately 0.004 km. from weighted mean H=29.64.

2020 YL1	NEODyS	2201	2038-2116	7	5.3e-08	-4.64	-4.86	0	NEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2020-12-19.376 to 2020-12-24.400."
2020 YL1	JPL Sentry	1810	2038-2116	8	1.775412e-07	-3.96	-4.05	0	JPL: Computed at 06:31 today Pacific time based on 43 observations spanning 5.0240 days (2020-Dec-19.375273 to 2020-Dec-24.39925). Diameter approximately 0.260 km. from weighted mean H=20.55.

2020 YA1	NEODyS	2201	2093-2118	9	4.59e-06	-6.65	-6.75	0	NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2020-12-17.405 to 2020-12-24.415."
2020 YA1	JPL Sentry	1810	2058-2113	5	5.055553e-06	-6.60	-6.79	0	JPL: Computed at 06:40 today Pacific time based on 48 observations spanning 7.0096 days (2020-Dec-17.404234 to 2020-Dec-24.413825). Diameter approximately 0.015 km. from weighted mean H=26.71.

2020 XF	NEODyS	2201	2056-2120	509	1.04e-03	-4.01	-4.16	n/a	NEODyS #2 for the day: "Based on 95 optical observations (of which 2 are rejected as outliers) from 2020-12-04.328 to 2020-12-24.184."
2020 XF	JPL Sentry	1810	2056-2120	135	0.000374351526	-4.52	-5.02	0	JPL: Computed at 06:54 today Pacific time based on 93 observations spanning 18.767 days (2020-Dec-04.32683 to 2020-Dec-23.09403). Diameter approximately 0.015 km. from weighted mean H=26.70.

2020 VV	NEODyS	2201	2044-2120	478	4.31e-03	-3.61	-4.19	n/a	NEODyS: "Based on 79 optical observations (of which 1 are rejected as outliers) from 2020-10-17.215 to 2020-12-17.328."
2020 VV	JPL Sentry	1810	2044-2113	139	0.002201438094	-3.90	-4.37	0	JPL: Computed at 06:46 today Pacific time based on 79 observations spanning 61.112 days (2020-Oct-17.214515 to 2020-Dec-17.326949). Diameter approximately 0.012 km. from weighted mean H=27.27.

2017 YO5	JPL Sentry	1810	2090-2117	9	1.379332e-05	-5.77	-6.07	0	JPL: Computed at 07:59 March 13th of 2018 Pacific time based on 31 observations spanning 26.117 days (2017-Dec-25.45197 to 2018-Jan-20.568928). Diameter approximately 0.020 km. from weighted mean H=26.13.

2013 YB	JPL Sentry	1810	2022-2063	26	7.46111574e-05	-6.32	-6.67	0	JPL: Computed at 08:53 April 8th of 2017 Pacific time based on 11 observations spanning .16022 days (2013-Dec-23.21048 to 2013-Dec-23.3707). Diameter approximately 0.002 km. from weighted mean H=31.44.

2008 YD3	JPL Sentry	1810	2021-2110	30	1.08172e-07	-7.21	-7.66	0	JPL: Computed at 12:49 Dec. 18th of 2019 Pacific time based on 12 observations spanning .14315 days (2008-Dec-22.34245 to 2008-Dec-22.4856). Diameter approximately 0.021 km. from weighted mean H=26.04.

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 24 December '20

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

2306	Grabbed MPEC 2020-Y117 - 2020 YR3 - see above Grabbed MPEC 2020-Y118 - 2020 YU3 - see above Grabbed MPEC 2020-Y119 - 2020 YV3 - see above Grabbed MPEC 2020-Y120 - 2020 YW3 - see above Grabbed MPEC 2020-Y121 - 2020 YX3 - see above Grabbed MPEC 2020-Y122 - 2020 YY3 - see above Grabbed MPEC 2020-Y123 - 2020 YZ3 - see above
2201	Noted that NEODyS has updated its 2020 VV risk assessment - see above Noted that NEODyS has updated its 2020 XF risk assessment - see above Noted that NEODyS has updated its 2020 YA1 risk assessment - see above Noted that NEODyS has updated its 2020 YC3 risk assessment - see above Noted that NEODyS has updated its 2020 YL1 risk assessment - see above
2200	Noted that NEODyS has posted 2020 YM3 as an impact risk - see above Noted that NEODyS has removed 2020 YS2 as an impact risk - see above Grabbed MPEC 2020-Y114 - 2020 YO3 - see above Grabbed MPEC 2020-Y115 - 2020 YP3 - see above Grabbed MPEC 2020-Y116 - 2020 YQ3 - see above
1810	Noted that JPL Sentry has updated its 2008 YD3 risk assessment - see above Noted that JPL Sentry has updated its 2013 YB risk assessment - see above Noted that JPL Sentry has updated its 2017 YO5 risk assessment - see above Noted that JPL Sentry has updated its 2020 VV risk assessment - see above Noted that JPL Sentry has updated its 2020 XF risk assessment - see above Noted that NEODyS has updated its 2020 XF risk assessment - see above Noted that JPL Sentry has updated its 2020 YA1 risk assessment - see above Noted that JPL Sentry has updated its 2020 YC3 risk assessment - see above Noted that JPL Sentry has posted 2020 YK3 as an impact risk - see above Noted that NEODyS has posted 2020 YK3 as an impact risk - see above Noted that JPL Sentry has updated its 2020 YL1 risk assessment - see above Noted that JPL Sentry has updated its 2020 YM1 risk assessment - see above Noted that JPL Sentry has updated its 2020 YS2 risk assessment - see above Grabbed MPEC 2020-Y109 - Daily Orbit Update - see above Grabbed MPEC 2020-Y110 - 2020 YL3 - see above Grabbed MPEC 2020-Y111 - 2020 YM3 - see above Grabbed MPEC 2020-Y112 - 2013 JM14 - see above Grabbed MPEC 2020-Y113 - 2020 YN3 - see above
0530	Grabbed MPEC 2020-Y107 - 2020 YJ3 - see above Grabbed MPEC 2020-Y108 - 2020 YK3 - see above

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