2020-12-27 Tracking News

Contents on 27 December '20

IAU Minor Planet Center
- NEOCP Activity -- 39 listings
- New MPECs -- seven MPECs
Observers -- 25 observers
Impact Risk Monitoring -- nine 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 will be some 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 1245 risk-listed objects, 140 have had news in the last 31 days. Updated at 1705 UTC on 27 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 27 December '20

The MPC's NEO Confirmation Page has 39 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 39 objects listed. Of these, seventeen were "one nighters." So far The Tracking News has counted a total of 51 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 27 December '20

Minor Planet Electronic Circulars

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

MPEC 2020-Y138 time-stamped "02:28 UT" - 2020 YM4 - see below
MPEC 2020-Y139 time-stamped "02:30 UT" - 2020 YN4 - see below
MPEC 2020-Y140 time-stamped "02:31 UT" - 2020 YO4 - see below
MPEC 2020-Y141 time-stamped "03:06 UT" - 2020 YP4 - see below
MPEC 2020-Y142 time-stamped "12:38 UT" - Daily Orbit Update - see below
MPEC 2020-Y143 time-stamped "14:50 UT" - 2014 DY112 - see below
MPEC 2020-Y144 time-stamped "15:14 UT" - 2020 YQ4

MPEC 2020-Y144 - "15:14 UT" - 2020 YQ4

K20Y04Q 2020 YQ4 (H=20.8 ~234m) was picked up at 1140 UT on 23 Dec. by the Mt. Lemmon Survey (MLS), observing it at Dec. 23.49-50p3, 24.52p3, and 26.55p3. This detection was confirmed by the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (Dec. 23.53-54p3) and Visnjan Obs. (Dec. 27.10-11p3).

MPEC 2020-Y143 - "14:50 UT" - 2014 DY112

K14DB2Y 2014 DY112 (H=19.4 ~446m) from Pan-STARRS 1 (PS1) (2014 Feb. 10.49-53p4 at G=21.26-22.22, 2014 March 5.49-52p4 at G=20.48-21.83, 2014 March 24.35-38p4 at G=21.66-22.02, 2014 April 4.30-34p3 at G=21.21-22.71, 2019 April 5.34-36p3 at G=22.30-23.56 & 2019 April 8.35-37p3 at G=23.11-42), Pan-STARRS 2 (PS2) (Dec. 7.62-64p4), MLS (Dec. 27.50-51p4), and Steward Obs. Mt. Lemmon Station (Dec. 27.53-54p3)

<< DOU on 27 December '20 >> MPEC 2020-Y142 - "12:38 UT" - Daily Orbit Update

Observations of risk-listed objects
K20Y04N 2020 YN4 (small asteroid, arc=3 days, H=27.0 ~13m, close passer) from Schiaparelli Obs. (Dec. 27.05-07p3)
K20Y03C 2020 YC3 (arc=6 days, H=20.1 ~323m) from Steward Mt. Lemmon Sta. (Dec. 27.26-27p3)
K20Y03A 2020 YA3 (small asteroid, arc=6 days, H=25.9 ~22m, close passer) from Steward Mt. Lemmon Sta. (Dec. 27.33-34p3)
K20Y01L 2020 YL1 (i=48.8°, arc=8 days, H=20.4 ~282m) from Steward Mt. Lemmon Sta. (Dec. 27.25p4) and Spacewatch via Kitt Peak Natl. Obs. (KPNO) (Dec. 27.26p3)
K20Y01A 2020 YA1 (small asteroid, arc=10 days, H=26.7 ~15m, close passer, NHATS target) from MLS (Dec. 26.36-38p4) and Steward Mt. Lemmon Sta. (Dec. 27.45p3)
K20X00F 2020 XF (small asteroid, arc=23 days, H=26.8 ~15m, close passer, NHATS target) from Spacewatch/KPNO (Dec. 27.10-13p3 at R=22.1-2)
Observations of recently (no longer) risk-listed objects
K20Y01E 2020 YE1 (Q=4.598 AU, arc=9 days, H=21.6 ~162m) from MLS (Dec. 26.53-55p4) and Steward Mt. Lemmon Sta. (Dec. 27.47p2)
K20X05D 2020 XD5 (arc=16 days, H=20.0 ~339m) from Steward Mt. Lemmon Sta. (Dec. 26.51-52p3 & 27.46p2)
K20X00R 2020 XR (Q=4.026 AU, arc=3 opp, H=19.9 ~355m) from PS1 (Dec. 26.24-26p3)
Observations of close-passing objects
K20Y04P 2020 YP4 (arc=1 day, H=26.1 ~20m, NHATS target) from Steward Mt. Lemmon Sta. (Dec. 27.34p2)
K20Y04M 2020 YM4 (arc=4 days, H=25.9 ~22m) from Steward Mt. Lemmon Sta. (Dec. 27.43p3)
K20Y04G 2020 YG4 (arc=2 days, H=25.5 ~27m) from Farra d'Isonzo Obs. (Dec. 26.89-90p4)
K20Y04A 2020 YA4 (arc=4 days, H=26.5 ~17m, NHATS target) from MLS (Dec. 26.43-45p4) and Steward Mt. Lemmon Sta. (Dec. 26.52-53p3 & 27.42-44p5)
K20Y03Z 2020 YZ3 (arc=2 days, H=27.8 ~9m) from MLS (Dec. 24.21p2)
K20Y03O 2020 YO3 (arc=4 days, H=24.6 ~41m) from Steward Mt. Lemmon Sta. (Dec. 27.15p3)
K20Y02L 2020 YL2 (arc=7 days, H=25.0 ~34m) from Astronomical Research Obs. Westfield (Dec. 26.15p4)
K20X04Z 2020 XZ4 (arc=16 days, H=24.8 ~37m, NHATS target) from the Catalina Sky Survey (CSS) (Dec. 26.39-41p4) and Steward Mt. Lemmon Sta. (Dec. 27.44p3)
K20T12B 2020 TB12 (arc=73 days, H=21.7 ~155m) from Steward Mt. Lemmon Sta. (Dec. 27.12-13p3)
J99R45M 1999 RM45 (arc=6 opp, H=19.4 ~446m) from the Spacewatch 1.8m telescope (Dec. 26.49-51p3)
o1647 501647 2014 SD224 from Northolt Branch Obs. (Dec. 24.83-84p3)
Observation campaigns (NHATS targets, radar support)
K20Y03N 2020 YN3 (arc=5 days, H=23.1 ~81m, NHATS) from PS2 (Dec. 25.42-44p3), MLS (Dec. 26.28-30p4), and ATLAS Mauna Loa (Dec. 26.47-49p4)
K20W04N 2020 WN4 (arc=44 days, H=22.5 ~107m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 26.52p2 at G=21.14-22.22)
K20S00O 2020 SO (Q=0.988 AU, arc=32 days, H=28.4 ~7m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 26.08p3 & 27.06-07p3)
K06Y00F 2006 YF (arc=3 opp, H=21.0 ~214m, NHATS) from MLS (Dec. 26.22-24p3)
04179 4179 Toutatis (1989 AC) (radar) from CSS (Dec. 26.08-10p4)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20Y04K 2020 YK4 (arc=5 days, H=24.9 ~35m) from Farra d'Isonzo Obs. (Dec. 26.93-95p3)
K20Y04J 2020 YJ4 (arc=3 days, H=23.9 ~56m) from Squirrel Valley Obs. (Dec. 27.07-08p3)
K20Y04C 2020 YC4 (arc=4 days, H=24.8 ~37m) from Steward Mt. Lemmon Sta. (Dec. 27.27-28p4)
K20Y04B 2020 YB4 (arc=4 days, H=25.0 ~34m) from Steward Mt. Lemmon Sta. (Dec. 27.25-26p3)
K20Y01V 2020 YV1 (arc=8 days, H=24.4 ~45m) from Steward Mt. Lemmon Sta. (Dec. 27.37p3)
K20Y01R 2020 YR1 (arc=8 days, H=22.8 ~93m) from Steward Mt. Lemmon Sta. (Dec. 26.49p2 & 27.47-48p3)
K20Y01O 2020 YO1 (arc=8 days, H=25.6 ~26m) from Steward Mt. Lemmon Sta. (Dec. 27.35-36p3)
K20V07C 2020 VC7 (arc=51 days, H=24.1 ~51m) from PS1 (Dec. 26.40-42p3)
K20T07Q 2020 TQ7 (arc=98 days, H=22.1 ~129m) from Steward Mt. Lemmon Sta. (Dec. 26.51-52p4)
K12XD3E 2012 XE133 (arc=2 opp, H=23.3 ~74m) from Northolt Branch Obs. (Dec. 24.86-87p3) and Farra d'Isonzo Obs. (Dec. 26.74p3)
K20X02P 2020 XP2 (arc=19 days, H=22.0 ~135m) from MLS (Dec. 26.39-40p4) and Steward Mt. Lemmon Sta. (Dec. 26.55p4)
K19C01T 2019 CT1 (arc=2 opp, H=21.9 ~141m) from MLS (Dec. 26.53-55p4 at G=21.94-22.50)
Observations of other objects
K20Y01P 2020 YP1 (i=37.1°, q=0.349 AU, arc=8 days, H=21.7 ~155m) from Steward Mt. Lemmon Sta. (Dec. 27.20p3)
K20X04W 2020 XW4 (arc=18 days, H=21.2 ~195m) from MLS (Dec. 26.34-36p4) and Steward Mt. Lemmon Sta. (Dec. 27.41-42p3)
K20X04A 2020 XA4 (arc=18 days, H=21.0 ~214m) from Steward Mt. Lemmon Sta. (Dec. 27.28-29p3)
K20X03L 2020 XL3 (arc=17 days, H=21.2 ~195m) from MLS (Dec. 26.15-17p4)
K20X01N 2020 XN1 (i=36.8°, Q=4.001 AU, arc=37 days, H=19.6 ~407m) from Dettelbach Vineyard Obs. (Dec. 25.84p3)
K20W05V 2020 WV5 (arc=35 days, H=20.2 ~309m) from Steward Mt. Lemmon Sta. (Dec. 27.17-19p3)
K20W05S 2020 WS5 (i=40.9°, Q=4.060 AU, arc=28 days, H=20.7 ~245m) from Dettelbach Vineyard Obs. (Dec. 25.80-81p3)
K20W05M 2020 WM5 (Q=4.830 AU, arc=29 days, H=20.3 ~295m) from CSS (Dec. 26.29-30p2), PS1 (Dec. 26.40-44p4), PS2 (Dec. 26.50-51p2), and Steward Mt. Lemmon Sta. (Dec. 27.38-41p3)
K20W05A 2020 WA5 (arc=32 days, H=21.5 ~170m) from Northolt Branch Obs. (Dec. 24.84-85p3), CSS (Dec. 26.35-36p3), and M57 Obs. (Dec. 27.07-09p4)
K20W04J 2020 WJ4 (arc=42 days, H=20.9 ~224m) from MLS (Dec. 26.32-34p4)
K20W03L 2020 WL3 (i=63.7°, Q=4.389 AU, arc=36 days, H=18.7 ~616m) from ATLAS Mauna Loa (Dec. 26.61-65p4)
K20W01Z 2020 WZ1 (i=45.2°, arc=40 days, H=20.3 ~295m) from Steward Mt. Lemmon Sta. (Dec. 27.29-31p3)
K20W01J 2020 WJ1 (Q=4.489 AU, arc=43 days, H=19.8 ~371m) from Steward Mt. Lemmon Sta. (Dec. 26.50p4)
K20V06Q 2020 VQ6 (arc=40 days, H=21.2 ~195m) from Dettelbach Vineyard Obs. (Dec. 25.82-83p3)
K20V03M 2020 VM3 (arc=47 days, H=20.7 ~245m) from PS2 (Dec. 26.49-52p3) and Steward Mt. Lemmon Sta. (Dec. 27.36p3)
K20U03U 2020 UU3 (Q=4.967 AU, arc=96 days, H=21.0 ~214m) from Steward Mt. Lemmon Sta. (Dec. 27.08p3)
K20R09O 2020 RO9 (Q=4.238 AU, arc=103 days, H=18.5 ~676m) from MLS (Dec. 26.37-38p4) and Steward Mt. Lemmon Sta. (Dec. 26.49-55p4)
K20R00U 2020 RU (Q=4.833 AU, arc=119 days, H=19.2 ~490m) from Steward Mt. Lemmon Sta. (Dec. 27.21-23p3)
K20Q06U 2020 QU6 (arc=122 days, H=18.1 ~812m) from Steward Mt. Lemmon Sta. (Dec. 27.10-11p2)
K20Q06Q 2020 QQ6 (Q=4.107 AU, arc=136 days, H=19.8 ~371m) from Steward Mt. Lemmon Sta. (Dec. 27.16-17p3)
K20P05C 2020 PC5 (Q=4.177 AU, arc=134 days, H=18.5 ~676m) from the Spacewatch 0.9m telescope (Dec. 26.19-20p3)
K19B01O 2019 BO1 (arc=3 opp, H=19.7 ~389m) from CSS (Dec. 26.31-32p4)
K18K02M 2018 KM2 (arc=3 opp, H=20.3 ~295m) from MLS (Dec. 26.20-21p4)
K17X62H 2017 XH62 (arc=3 opp, H=20.0 ~339m) from MLS (Dec. 26.18-19p4)
K17B31L 2017 BL31 (q=0.370 AU, Q=4.566 AU, arc=3 opp, H=19.1 ~513m) from MLS (Dec. 26.20-21p4)
K16E85D 2016 ED85 (Q=5.062 AU, arc=3 opp, H=17.7 ~977m) from ATLAS Mauna Loa (Dec. 26.64-66p4)
K16C32B 2016 CB32 (Q=4.713 AU, arc=3 opp, H=18.7 ~616m) from ATLAS Mauna Loa (Dec. 26.48-54p5)
K15D53Z 2015 DZ53 (q=0.196 AU, arc=2 opp, H=20.9 ~224m) from Visnjan Obs. (Dec. 26.70p5)
K14Wa5G 2014 WG365 (arc=3 opp, H=20.1 ~323m) from Muensterschwarzach Obs. (Dec. 25.75-76p3)
K14J57H 2014 JH57 (Q=6.247 AU, arc=5 opp, H=16.2 ~1.95 km) from Spacewatch 0.9m (Dec. 26.51-52p3)
K14C00S 2014 CS (arc=3 opp, H=19.8 ~371m) from Spacewatch/KPNO (Dec. 26.50-52p3)
K13U14X 2013 UX14 (arc=4 opp, H=18.2 ~776m) from Dettelbach Vineyard Obs. (Dec. 25.83p3)
K12S22A 2012 SA22 (arc=3 opp, H=18.1 ~812m) from Muensterschwarzach Obs. (Dec. 25.84p4) and Dettelbach Vineyard Obs. (Dec. 25.84-85p3)
K09A16E 2009 AE16 (i=46.1°, arc=4 opp, H=18.7 ~616m) from MLS (Dec. 26.47-49p4)
K03Y17P 2003 YP17 (arc=4 opp, H=19.0 ~537m) from ATLAS Mauna Loa (Dec. 26.37-40p4)
K03Y01M 2003 YM1 (arc=3 opp, H=18.1 ~812m) from MLS (Dec. 26.28-30p4) and ATLAS Mauna Loa (Dec. 26.46-48p4)
K03E16H 2003 EH16 (arc=2 opp, H=20.4 ~282m) from MLS (Dec. 26.51-53p4 at G=21.45-22.10)
K02T67S 2002 TS67 (arc=6 opp, H=19.1 ~513m) from CSS (Dec. 26.24-26p4) and Squirrel Valley Obs. (Dec. 27.10-11p3)
K02G08Z 2002 GZ8 (Q=4.633 AU, arc=4 opp, H=18.8 ~589m) from MLS (Dec. 26.43-45p4) and ATLAS Mauna Loa (Dec. 26.59-61p4)
K01Y03V 2001 YV3 (arc=3 opp, H=20.5 ~269m) from ATLAS Mauna Loa (Dec. 26.41-43p4) and BAS Obs. (Dec. 26.94p3)
J99V15X 1999 VX15 (Q=4.807 AU, arc=2 opp, H=18.7 ~616m) from ATLAS Haleakala (Dec. 26.49-51p4)
p7103 517103 2013 EM20 from ATLAS Mauna Loa (Dec. 26.63-66p5)
p1520 511520 2014 QW296 from MLS (Dec. 26.37-38p4)
o5093 505093 2011 VQ5 from CSS (Dec. 26.29-30p4)
n7094 497094 2004 AH from ATLAS Mauna Loa (Dec. 26.50-53p4)
m2228 482228 2011 BH10 from MLS (Dec. 26.06-08p4)
k5749 465749 2009 WO6 from CSS (Dec. 26.51-52p4)
j7768 457768 2009 KN4 from MLS (Dec. 26.30-32p4)
h8902 438902 2009 WF104 from CSS (Dec. 26.30-32p4) and ATLAS Mauna Loa (Dec. 26.55-63p4)
g0591 420591 2012 HF31 from MLS (Dec. 26.32-34p4)
f7581 417581 2006 VA3 from MLS (Dec. 26.38-40p4)
f6694 416694 2004 YR32 from CSS (Dec. 26.37-39p4) and ATLAS Mauna Loa (Dec. 26.55-58p4)
f5029 415029 2011 UL21 from ATLAS Mauna Loa (Dec. 26.35-36p4)
d9611 399611 2004 BE11 from PS1 (Dec. 26.64-66p3)
c0359 380359 2002 TN30 from CSS (Dec. 26.39-41p4)
c0128 380128 1997 WB21 from MLS (Dec. 26.18-20p4)
Z1370 351370 2005 EY from PS2 (Dec. 26.40-43p3)
Y9074 349074 2007 BM8 from PS2 (Dec. 26.63-65p4)
Y5705 345705 2006 VB14 from CSS (Dec. 26.12-14p4)
V3548 313548 2003 BL1 from MLS (Dec. 26.43-45p4)
S3729 283729 2002 UX from ATLAS Mauna Loa (Dec. 26.39-42p4) and BAS Obs. (Dec. 26.96p3)
O7156 247156 2000 YH29 from MLS (Dec. 26.36-38p4)
N7551 237551 2000 WQ19 from MLS (Dec. 26.13-14p3)
K3471 203471 2002 AU4 from ATLAS Mauna Loa (Dec. 26.60-61p4)
K2411 202411 2005 RC from ATLAS Haleakala (Dec. 26.61-64p5)
I6822 186822 2004 FE31 from ATLAS Haleakala (Dec. 26.32p1 & 26.39-40p3)
H3664 173664 2001 JU2 from MLS (Dec. 26.24-26p4)
G3014 163014 2001 UA5 from CSS (Dec. 26.09-10p3)
G2510 162510 2000 QW69 from ATLAS Mauna Loa (Dec. 26.64-66p7)
G2186 162186 1999 OP3 from ATLAS Mauna Loa (Dec. 26.47-52p4)
G2173 162173 Ryugu (1999 JU3) from ATLAS Haleakala (Dec. 26.20-22p8)
G2142 162142 1998 VR from PS1 (Dec. 26.22-25p3)
F9402 159402 1999 AP10 from CSS (Dec. 26.50-52p4)
F2941 152941 2000 FM10 from ATLAS Mauna Loa (Dec. 26.60-61p4)
E2464 142464 2002 TC9 from ATLAS Haleakala (Dec. 26.62-64p4)
E0333 140333 2001 TD2 from MLS (Dec. 26.11-12p4)
D8859 138859 2000 WN63 from MLS (Dec. 26.49-51p4) and ATLAS Mauna Loa (Dec. 26.62-64p4)
D8175 138175 2000 EE104 from CSS (Dec. 26.26-28p4)
D8095 138095 2000 DK79 from CSS (Dec. 26.08-10p3)
D7805 137805 1999 YK5 from ATLAS Mauna Loa (Dec. 26.23-25p4)
D7099 137099 1998 YW3 from CSS (Dec. 26.31-32p3)
D7078 137078 1998 XZ4 from MLS (Dec. 26.32-34p4)
D7032 137032 1998 UO1 from PS1 (Dec. 26.28-30p3)
99935 99935 2002 AV4 from CSS (Dec. 26.37-39p4) and ATLAS Mauna Loa (Dec. 26.53-55p4)
96315 96315 1997 AP10 from MLS (Dec. 26.18-20p4)
90147 90147 2002 YK14 from CSS (Dec. 26.22-23p4)
89355 89355 2001 VS78 from MLS (Dec. 26.26-27p4), ATLAS Mauna Loa (Dec. 26.44-46p4), and BAS Obs. (Dec. 26.99p3)
88188 88188 2000 XH44 from CSS (Dec. 26.24-26p4)
87684 87684 2000 SY2 from ATLAS Haleakala (Dec. 26.25-27p4)
85275 85275 1994 LY from ATLAS Haleakala (Dec. 26.32p1 & 26.39-40p3)
65717 65717 1993 BX3 from ATLAS Haleakala (Dec. 26.40-42p4)
53435 53435 1999 VM40 from CSS (Dec. 26.29-30p4)
38086 38086 Beowulf (1999 JB) from PS1 (Dec. 26.65-66p4)
36183 36183 1999 TX16 from CSS (Dec. 26.10-12p4)
35107 35107 1991 VH from ATLAS Haleakala (Dec. 26.23-25p4)
31669 31669 1999 JT6 from SATINO-1 (Aug. 20.12p2)
25916 25916 2001 CP44 from MLS (Dec. 26.30-32p4)
23183 23183 2000 OY21 from MLS (Dec. 26.49-51p4) and ATLAS Mauna Loa (Dec. 26.62-67p5)
22753 22753 1998 WT from MLS (Dec. 26.26-28p4)
21374 21374 1997 WS22 from CSS (Dec. 26.26-28p4)
21088 21088 Chelyabinsk (1992 BL2) from MLS (Dec. 26.28-30p4) and ATLAS Mauna Loa (Dec. 26.47-49p4)
12538 12538 1998 OH from ATLAS Haleakala (Dec. 26.47-49p4)
11405 11405 1999 CV3 from ATLAS Haleakala (Dec. 26.21-23p4)
10165 10165 1995 BL2 from MLS (Dec. 26.32-34p4)
09172 9172 Abhramu (1989 OB) from CSS (Dec. 26.08-09p2)
08567 8567 1996 HW1 from PS2 (Dec. 26.45-49p4) and ATLAS Mauna Loa (Dec. 26.49-52p4)
07753 7753 1988 XB from ATLAS Mauna Loa (Dec. 26.36-41p8) and Squirrel Valley Obs. (Dec. 27.04-06p3)
06053 6053 1993 BW3 from BAS Obs. (Dec. 26.75-77p3)
05131 5131 1990 BG from ATLAS Mauna Loa (Dec. 26.63-65p4)
04953 4953 1990 MU from CSS (Dec. 26.06-08p4) and ATLAS Haleakala (Dec. 26.20-22p4)
04055 4055 Magellan (1985 DO2) from ATLAS Haleakala (Dec. 26.32-33p2 & 26.39-40p2)
03908 3908 Nyx (1980 PA) from CSS (Dec. 26.12-14p4)
02368 2368 Beltrovata (1977 RA) from ATLAS Mauna Loa (Dec. 26.34-36p4)
01036 1036 Ganymed (1924 TD) from ATLAS Haleakala (Dec. 26.50-52p4)
00887 887 Alinda (1918 DB) from CSS (Dec. 26.13-15p4)

MPEC 2020-Y141 - "03:06 UT" - 2020 YP4

K20Y04P 2020 YP4 (Earth MOID=2.8 LD, H=26.1 ~20m, NHATS target) was picked up at 0718 UT on 26 Dec. by MLS, observing it at Dec. 26.30-32p4. This detection was confirmed by ARO Westfield (Dec. 26.36-37p3), Sandlot Obs. (Dec. 26.37-41p4), Steward Mt. Lemmon Sta. (Dec. 26.47p4), Visnjan Obs. (Dec. 26.92-93p4), and Schiaparelli Obs. (Dec. 26.97-99p2).

MPEC 2020-Y140 - "02:31 UT" - 2020 YO4

K20Y04O 2020 YO4 (small asteroid, H=24.5 ~43m) was picked up at 1419 UT on 24 Dec. by PS1, observing it at Dec. 24.60-63p3. This detection was confirmed by MLS (Dec. 23.42-43p3), Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Dec. 25.28-29p3), Spacewatch 1.8m (Dec. 26.44-45p3), and Visnjan Obs. (Dec. 27.02p3).

MPEC 2020-Y139 - "02:30 UT" - 2020 YN4

K20Y04N 2020 YN4 (risk listed, Earth MOID=0.7 LD, H=27.0 ~13m, close passer) was picked up at 0814 UT on 26 Dec. by MLS, observing it at Dec. 24.43-45p2 and 26.34-36p3. This detection was confirmed by ARO Westfield (Dec. 26.39p4), Steward Mt. Lemmon Sta. (Dec. 26.46p3 & 26.54-55p4), Visnjan Obs. (Dec. 26.94-95p4), GiaGa Obs. (Dec. 26.99-01p2), and Farra d'Isonzo Obs. (Dec. 27.05-07p3).

MPEC 2020-Y138 - "02:28 UT" - 2020 YM4

K20Y04M 2020 YM4 (Earth MOID=3.0 LD, H=25.9 ~22m) was picked up at 0916 UT on 26 Dec. by MLS, observing it at Dec. 26.39-40p2. This detection was confirmed by CSS (Dec. 23.53p1), ARO Westfield (Dec. 26.42p3), Steward Mt. Lemmon Sta. (Dec. 26.42p4 & 26.51p4), Sandlot Obs. (Dec. 26.42-43p3), Visnjan Obs. (Dec. 26.95-96p5), Farra d'Isonzo Obs. (Dec. 26.98-00p2), and GiaGa Obs. (Dec. 27.04-07p3).

Observers on 27 December '20

A total of 25 observers appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 4 in MPECs 2020-Y138, 2020-Y139, 2020-Y141 & 2020-Y142 -- 2020 YP4, 2020 YN4, 2020 YM4, 2020 YL2
`T05`	ATLAS Haleakala in Hawaii, 14 in MPEC 2020-Y142 -- 1999 VX15, 87684, 85275, 65717, 35107, 202411, 186822, 162173, 142464, 12538, 11405, 4953, 4055, 1036
`T08`	ATLAS Mauna Loa in Hawaii, 28 in MPEC 2020-Y142 -- 2020 YN3, 2020 WL3, 2016 ED85, 2016 CB32, 2003 YP17, 2003 YM1, 2002 GZ8, 2001 YV3, 99935, 89355, 517103, 497094, 438902, 416694, 415029, 283729, 23183, 21088, 203471, 162510, 162186, 152941, 138859, 137805, 8567, 7753, 5131, 2368
`G17`	BAS Obs., 4 in MPEC 2020-Y142 -- 2001 YV3, 89355, 283729, 6053
`703`	Catalina Sky Survey (CSS) in Arizona, 28 in MPECs 2020-Y138 & 2020-Y142 -- 2020 YM4, 2020 XZ4, 2020 WM5, 2020 WA5, 2019 BO1, 2002 TS67, 99935, 90147, 88188, 53435, 505093, 465749, 438902, 416694, 380359, 36183, 345705, 21374, 163014, 159402, 138175, 138095, 137099, 9172, 4953, 4179, 3908, 887
`V06`	Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2020-Y144 -- 2020 YQ4
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2020-Y140 -- 2020 YO4
`K87`	Dettelbach Vineyard Obs. in Germany, 5 in MPEC 2020-Y142 -- 2020 XN1, 2020 WS5, 2020 VQ6, 2013 UX14, 2012 SA22
`595`	Farra d'Isonzo Obs. in Italy, 5 in MPECs 2020-Y138, 2020-Y139 & 2020-Y142 -- 2020 YN4, 2020 YM4, 2020 YK4, 2020 YG4, 2012 XE133
`203`	GiaGa Obs. in Italy, 2 in MPECs 2020-Y138 & 2020-Y139 -- 2020 YN4, 2020 YM4
`695^`	Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 3 in MPEC 2020-Y142 -- 2020 YL1, 2020 XF, 2014 CS
`K38`	M57 Obs. in Italy, 1 in MPEC 2020-Y142 -- 2020 WA5
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 45 in MPECs 2020-Y138, 2020-Y139, 2020-Y140, 2020-Y141, 2020-Y142, 2020-Y143 & 2020-Y144 -- 2020 YZ3, 2020 YQ4, 2020 YP4, 2020 YO4, 2020 YN4, 2020 YN3, 2020 YM4, 2020 YE1, 2020 YA4, 2020 YA1, 2020 XW4, 2020 XP2, 2020 XL3, 2020 WJ4, 2020 RO9, 2019 CT1, 2018 KM2, 2017 XH62, 2017 BL31, 2014 DY112, 2009 AE16, 2006 YF, 2003 YM1, 2003 EH16, 2002 GZ8, 96315, 89355, 511520, 482228, 457768, 420591, 417581, 380128, 313548, 25916, 247156, 237551, 23183, 22753, 21088, 173664, 140333, 138859, 137078, 10165
`K74`	Muensterschwarzach Obs. in Germany, 2 in MPEC 2020-Y142 -- 2014 WG365, 2012 SA22
`Z80`	Northolt Branch Obs. in England, 3 in MPEC 2020-Y142 -- 2020 WA5, 2012 XE133, 501647
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 9 in MPECs 2020-Y140, 2020-Y142 & 2020-Y143 -- 2020 YO4, 2020 XR, 2020 WM5, 2020 VC7, 2014 DY112, 399611, 38086, 162142, 137032
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 7 in MPECs 2020-Y142 & 2020-Y143 -- 2020 YN3, 2020 WM5, 2020 VM3, 2014 DY112, 351370, 349074, 8567
`H36`	Sandlot Obs. in Kansas, 2 in MPECs 2020-Y138 & 2020-Y141 -- 2020 YP4, 2020 YM4
`C95`	SATINO-1 in France, 1 in MPEC 2020-Y142 -- 31669
`204`	Schiaparelli Obs. in Italy, 2 in MPECs 2020-Y141 & 2020-Y142 -- 2020 YP4, 2020 YN4
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2020-Y142 -- 2020 PC5, 2014 JH57
`291`	Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2020-Y140 & 2020-Y142 -- 2020 YO4, 1999 RM45
`W34`	Squirrel Valley Obs. in North Carolina, 3 in MPEC 2020-Y142 -- 2020 YJ4, 2002 TS67, 7753
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 36 in MPECs 2020-Y138, 2020-Y139, 2020-Y141, 2020-Y142 & 2020-Y143 -- 2020 YV1, 2020 YR1, 2020 YP4, 2020 YP1, 2020 YO3, 2020 YO1, 2020 YN4, 2020 YM4, 2020 YL1, 2020 YE1, 2020 YC4, 2020 YC3, 2020 YB4, 2020 YA4, 2020 YA3, 2020 YA1, 2020 XZ4, 2020 XW4, 2020 XP2, 2020 XD5, 2020 XA4, 2020 WZ1, 2020 WV5, 2020 WN4, 2020 WM5, 2020 WJ1, 2020 VM3, 2020 UU3, 2020 TQ7, 2020 TB12, 2020 SO, 2020 RU, 2020 RO9, 2020 QU6, 2020 QQ6, 2014 DY112
`L01`	Visnjan Obs. in Croatia, 6 in MPECs 2020-Y138, 2020-Y139, 2020-Y140, 2020-Y141, 2020-Y142 & 2020-Y144 -- 2020 YQ4, 2020 YP4, 2020 YO4, 2020 YN4, 2020 YM4, 2015 DZ53

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

Impact Risk Monitoring on 27 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 YN4	JPL Sentry	1700	R E M O V E D						JPL #2 for the day

2020 YC3	JPL Sentry	1700	2115-2115	1	1.219e-10	-7.47	-7.47	0	JPL: Computed at 06:33 today Pacific time based on 30 observations spanning 6.0005 days (2020-Dec-21.271836 to 2020-Dec-27.272369). Diameter approximately 0.330 km. from weighted mean H=20.03.

2020 YA3	JPL Sentry	1700	2049-2119	14	1.741072e-05	-5.27	-5.36	0	JPL: Computed at 06:51 today Pacific time based on 34 observations spanning 5.9821 days (2020-Dec-21.355978 to 2020-Dec-27.338074). Diameter approximately 0.022 km. from weighted mean H=25.98.

2020 YL1	JPL Sentry	1700	2038-2116	5	9.19419e-08	-4.03	-4.05	0	JPL: Computed at 06:32 today Pacific time based on 53 observations spanning 7.8886 days (2020-Dec-19.375273 to 2020-Dec-27.26385). Diameter approximately 0.270 km. from weighted mean H=20.50.

2020 YA1	JPL Sentry	1700	2103-2113	3	3.6437e-06	-6.77	-6.88	0	JPL: Computed at 06:40 today Pacific time based on 59 observations spanning 10.047 days (2020-Dec-17.404234 to 2020-Dec-27.451476). Diameter approximately 0.015 km. from weighted mean H=26.76.

2020 XF	JPL Sentry	1700	2056-2120	134	0.000371894125	-4.54	-5.05	0	JPL: Computed at 06:54 today Pacific time based on 98 observations spanning 22.807 days (2020-Dec-04.32683 to 2020-Dec-27.13396). Diameter approximately 0.015 km. from weighted mean H=26.73.

2017 YK14	JPL Sentry	0600	2075-2075	1	1.718e-10	-11.58	-11.58	0	JPL: Computed at 10:23 Jan. 20th of 2018 Pacific time based on 11 observations spanning .14126 days (2017-Dec-25.369 to 2017-Dec-25.51026). Diameter approximately 0.008 km. from weighted mean H=28.21.

2017 YD2	JPL Sentry	0600	2055-2065	4	5.86907e-07	-8.03	-8.08	0	JPL: Computed at 11:11 Dec. 24th of 2017 Pacific time based on 26 observations spanning 1.1541 days (2017-Dec-23.35847 to 2017-Dec-24.51253). Diameter approximately 0.006 km. from weighted mean H=28.70.

2011 CL50	JPL Sentry	1700	2060-2119	101	7.7309637e-05	-5.42	-6.26	0	JPL: Computed at 19:55 Dec. 26th Pacific time based on 25 observations spanning 2.6354 days (2020-Dec-24.43494 to 2020-Dec-27.0703). Diameter approximately 0.014 km. from weighted mean H=26.99.

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 27 December '20

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

1700

Noted that JPL Sentry has updated its 2011 CL50 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 YA1 risk assessment - see above
Noted that JPL Sentry has updated its 2020 YA3 risk assessment - see above
Noted that JPL Sentry has updated its 2020 YC3 risk assessment - see above
Noted that JPL Sentry has updated its 2020 YL1 risk assessment - see above
Noted that JPL Sentry has removed 2020 YN4 as an impact risk - see above
Grabbed MPEC 2020-Y142 - Daily Orbit Update - see above
Grabbed MPEC 2020-Y143 - 2014 DY112 - see above
Grabbed MPEC 2020-Y144 - 2020 YQ4 - see above

0600

Noted that JPL Sentry has updated its 2017 YD2 risk assessment - see above
Noted that JPL Sentry has updated its 2017 YK14 risk assessment - see above
Noted that JPL Sentry has posted 2020 YN4 as an impact risk - see above
Grabbed MPEC 2020-Y138 - 2020 YM4 - see above
Grabbed MPEC 2020-Y139 - 2020 YN4 - see above
Grabbed MPEC 2020-Y140 - 2020 YO4 - see above
Grabbed MPEC 2020-Y141 - 2020 YP4 - see above

http://www.HohmannTransfer.com/mn/20/20362_1227.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>.