2020-12-15 Tracking News

Contents on 15 December '20

IAU Minor Planet Center
- NEOCP Activity -- 56 listings
- New MPECs -- six MPECs
Observers -- 42 observers
Impact Risk Monitoring -- twelve objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1238 risk-listed objects, 167 have had news in the last 31 days. Updated at 2101 UTC on 15 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 15 December '20

The MPC's NEO Confirmation Page has 56 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 56 objects listed. Of these, 30 were "one nighters." So far The Tracking News has counted a total of 67 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 15 December '20

Minor Planet Electronic Circulars

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

MPEC 2020-X179 time-stamped "01:01 UT" - 2020 XW5 - see below
MPEC 2020-X180 time-stamped "12:25 UT" - Daily Orbit Update - see below
MPEC 2020-X181 time-stamped "16:56 UT" - 1998 KY26 - see below
MPEC 2020-X182 time-stamped "17:56 UT" - 2020 XY5 - see below
MPEC 2020-X183 time-stamped "17:58 UT" - 2020 XZ5 - see below
MPEC 2020-X184 time-stamped "19:02 UT" - 2020 XA6

MPEC 2020-X184 - "19:02 UT" - 2020 XA6

K20X06A 2020 XA6 (risk listed, Earth MOID=0.5 LD, H=24.0 ~54m) was picked up at 0258 UT on 14 Dec. by the Mt. Lemmon Survey (MLS), observing it at Dec. 14.12-14p4. This detection was confirmed by Steward Obs. Mt. Lemmon Station (Dec. 14.16p4, 14.25p4 & 15.09p4), program code 1 via Schwarzschild Obs. (Dec. 14.69p2), Visnjan Obs. (Dec. 14.70-71p5), Galhassin Robotic Telescope (Dec. 14.72-75p2 & 14.80p1), Farra d'Isonzo Obs. (Dec. 14.74-75p3), Dettelbach Vineyard Obs. (Dec. 14.74p2), Pascoli Obs. (Dec. 14.74-75p3), Forti Obs. (Dec. 14.83-84p2), AstroColauri Obs. (Dec. 14.97p1), Great Shefford Obs. (Dec. 14.97-98p4), Squirrel Valley Obs. (Dec. 14.99-01p3), Astronomical Research Obs. Westfield (Dec. 15.04-05p5), Transit Dreams Obs. (Dec. 15.10-11p3), and Clixby Obs. (Dec. 15.75-76p3).

MPEC 2020-X183 - "17:58 UT" - 2020 XZ5

K20X05Z 2020 XZ5 (small asteroid, H=25.6 ~26m) was picked up at 0633 UT on 10 Dec. by Pan-STARRS 1 (PS1), observing it at Dec. 10.27-30p3 at w=21.48-73 and 15.43-46p3 at w=21.42-22.32. This detection was confirmed by MLS (Dec. 5.35-36p4 at G=21.3-22.1) and Pan-STARRS 2 (PS2) (Dec. 10.30-34p4).

MPEC 2020-X182 - "17:56 UT" - 2020 XY5

K20X05Y 2020 XY5 (small asteroid, H=23.2 ~78m) was picked up at 0907 UT on 14 Dec. by MLS, observing it at Nov. 22.46-48p3 and Dec. 14.38-39p3. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 14.48-49p3 & 15.40-41p3), Loiano Obs. (Dec. 14.96-99p3), and Visnjan Obs. (Dec. 15.06-08p3).

MPEC 2020-X181 - "16:56 UT" - 1998 KY26

J98K26Y 1998 KY26 (Earth MOID=1.1 LD, H=25.53 ~27m, NHATS) from UH/Tholen NEO Follow-Up 2.24m Telescope (2002 Feb. 16.46p1 at G=25.19 & 2002 Feb. 17.52p1 at G=25.33), Marco Micheli via Cerro Paranal (Dec. 10.21-23p2 at G=26.1, 12.20p1 at G=25.5 & 12.25-28p2 at G=25.4-8), and program code "<" (37) on Mauna Kea (Dec. 10.51p3 at R=25.4)

<< DOU on 15 December '20 >> MPEC 2020-X180 - "12:25 UT" - Daily Orbit Update

Observations of risk-listed objects
K20X05D 2020 XD5 (arc=4 days, H=20.0 ~339m) from the Spacewatch 0.9m telescope (Dec. 15.34-35p3)
K20X04F 2020 XF4 (small asteroid, arc=10 days, H=27.5 ~11m, close passer, NHATS target) from the Catalina Sky Survey (CSS) (Dec. 15.24-25p3)
K20X03X 2020 XX3 (small asteroid, arc=5 days, H=28.5 ~7m, close passer, NHATS target) from the Spacewatch 1.8m telescope (Dec. 14.16p3), Schwarzschild Obs./code 1 (Dec. 14.85-86p3), Great Shefford Obs. (Dec. 15.03-04p3), and Spacewatch 0.9m (Dec. 15.24-25p3)
K20X00C 2020 XC (small asteroid, arc=11 days, H=29.0 ~5m, close passer, NHATS target) from Spacewatch 1.8m (Dec. 14.29-32p3 at G=22.4-23.0)
Observations of recently (no longer) risk-listed objects
K20X02V 2020 XV2 (small asteroid, Q=4.593 AU, arc=5 days, H=23.5 ~68m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Dec. 14.29-30p3)
Observations of close-passing objects
K20X05S 2020 XS5 (arc=6 days, H=26.6 ~16m) from Pascoli Obs. (Dec. 14.82-83p3)
K20X04Y 2020 XY4 (arc=4 days, H=26.8 ~15m, NHATS target) from MLS (Dec. 15.36-38p3)
K20X04V 2020 XV4 (arc=3 days, H=25.4 ~28m) from Holmes/CTIO (Dec. 14.27-28p4) and Steward Mt. Lemmon Sta. (Dec. 15.42p4)
K20X03J 2020 XJ3 (arc=5 days, H=25.5 ~27m, NHATS target) from Schwarzschild Obs./code 1 (Dec. 14.94p3)
K20X01H 2020 XH1 (arc=8 days, H=22.9 ~89m) from BAS Obs. (Dec. 13.86-87p3), MLS (Dec. 14.17-18p4), CSS (Dec. 14.33-35p4), and ATLAS Mauna Loa (Dec. 14.43-48p4)
K20W05Z 2020 WZ5 from Schwarzschild Obs./code 1 (Dec. 15.16p3)
K20T12B 2020 TB12 (arc=61 days, H=21.6 ~162m) from Holmes/CTIO (Dec. 15.10-11p3)
Observation campaigns (NHATS targets, radar support)
K20X05E 2020 XE5 (arc=4 days, H=24.6 ~41m, NHATS) from Holmes/CTIO (Dec. 14.26-28p3) and Mt. John Obs. (Dec. 14.55-56p3)
K20X02O 2020 XO2 (arc=7 days, H=24.7 ~39m, NHATS) from Holmes/CTIO (Dec. 15.19p3)
K20X01D 2020 XD1 (arc=8 days, H=27.1 ~13m, NHATS) from Spacewatch 1.8m (Dec. 14.20-21p3)
K20X00W 2020 XW (arc=10 days, H=24.6 ~41m, NHATS) from Schwarzschild Obs./code 1 (Dec. 14.72-73p2)
K20W03K 2020 WK3 (arc=22 days, H=25.0 ~34m, NHATS) from Holmes/CTIO (Dec. 14.33-34p3)
K20W03F 2020 WF3 (arc=23 days, H=23.7 ~62m, NHATS) from MLS (Dec. 14.26-27p4)
K20V01Y 2020 VY1 (arc=35 days, H=25.9 ~22m, NHATS) from Holmes/CTIO (Dec. 15.15-16p3)
K20S00O 2020 SO (NHATS) from Steward Mt. Lemmon Sta. (Dec. 15.09-10p4)
K13Y02S 2013 YS2 (arc=2 opp, H=23.5 ~68m, NHATS) from CSS (Dec. 14.31-33p2)
K11G60D 2011 GD60 (arc=4 opp, H=21.8 ~148m, NHATS) from Transit Dreams Obs. (Dec. 15.11-13p3)
K06R01J 2006 RJ1 (arc=4 opp, H=22.2 ~123m, NHATS) from Spacewatch 0.9m (Dec. 15.21-22p3)
J0166 190166 2005 UP156 (radar) from PS1 (Dec. 15.21-24p4)
G3693 163693 Atira (2003 CP20) (radar) from ATLAS Mauna Loa (Dec. 14.64-65p3)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20X05W 2020 XW5 (arc=8 days, H=25.1 ~32m) from Schwarzschild Obs./code 1 (Dec. 14.92p3 at V=22.1-24.1), ARO Westfield (Dec. 15.13p2), and Steward Mt. Lemmon Sta. (Dec. 15.42p4)
K20X05A 2020 XA5 (arc=5 days, H=24.1 ~51m) from Holmes/CTIO (Dec. 14.22-25p3)
K20X04H 2020 XH4 (arc=4 days, H=23.2 ~78m) from Holmes/CTIO (Dec. 14.23-25p3)
K20X04G 2020 XG4 (arc=9 days, H=23.0 ~85m) from Holmes/CTIO (Dec. 15.17-18p3)
K20X04E 2020 XE4 (arc=4 days, H=25.5 ~27m) from Schwarzschild Obs./code 1 (Dec. 15.15p2)
K20X03F 2020 XF3 (arc=5 days, H=25.3 ~29m) from Holmes/CTIO (Dec. 14.26-27p3)
K20X03C 2020 XC3 (arc=6 days, H=22.5 ~107m) from Holmes/CTIO (Dec. 15.05p3)
K20X03A 2020 XA3 (arc=7 days, H=24.4 ~45m) from Holmes/CTIO (Dec. 15.13-14p3)
K20X02P 2020 XP2 (arc=8 days, H=22.1 ~129m) from Schwarzschild Obs./code 1 (Dec. 15.14-15p3)
K20X02N 2020 XN2 (arc=6 days, H=23.4 ~71m) from Lumezzane Obs. (Dec. 12.85-86p3), CSS (Dec. 14.29-31p3), and ATLAS Mauna Loa (Dec. 14.38-42p4)
K20X00J 2020 XJ (arc=10 days, H=25.2 ~31m) from MLS (Dec. 14.30-31p3)
K20W05T 2020 WT5 (arc=15 days, H=22.2 ~123m) from Mt. John Obs. (Dec. 14.51p3)
K20W04E 2020 WE4 (arc=21 days, H=23.5 ~68m) from Mt. John Obs. (Dec. 14.57-58p3)
K20W03O 2020 WO3 (arc=35 days, H=23.1 ~81m) from Holmes/CTIO (Dec. 15.10-12p3)
K20W03G 2020 WG3 (arc=23 days, H=24.2 ~49m) from the Bok Telescope (Dec. 14.29-31p3 at G=22.2-4)
K20W03C 2020 WC3 (arc=23 days, H=22.4 ~112m) from MLS (Dec. 14.21-22p4)
K20W02U 2020 WU2 (Q=4.699 AU, arc=25 days, H=22.8 ~93m) from Holmes/CTIO (Dec. 15.17-19p3)
K20V07C 2020 VC7 (arc=39 days, H=24.0 ~54m) from Lumezzane Obs. (Dec. 12.84-85p3)
K20V06M 2020 VM6 (arc=32 days, H=22.6 ~102m) from Mt. John Obs. (Dec. 14.49p2) and Holmes/CTIO (Dec. 15.14-15p3)
K20V02F 2020 VF2 (arc=35 days, H=23.6 ~65m) from Holmes/CTIO (Dec. 15.14-15p3 at G=22.4-5)
K20V00E 2020 VE (arc=59 days, H=23.1 ~81m) from Bok Tel. (Dec. 14.23-24p4 at G=22.2-23.4)
K20S02S 2020 SS2 (arc=88 days, H=22.7 ~98m) from Holmes/CTIO (Dec. 15.18-19p3 at G=22.2-3)
K20R06O 2020 RO6 (arc=93 days, H=22.5 ~107m) from Holmes/CTIO (Dec. 15.05-06p3)
K20P07K 2020 PK7 (arc=147 days, H=23.2 ~78m) from GINOP-KHK (Dec. 14.82p2)
K20X03K 2020 XK3 (i=57.8°, arc=6 days, H=21.8 ~148m) from Holmes/CTIO (Dec. 15.11-13p4)
K20X00P 2020 XP (arc=27 days, H=21.8 ~148m) from MLS (Dec. 14.15-17p4)
K20W02Y 2020 WY2 (arc=25 days, H=21.8 ~148m) from Holmes/CTIO (Dec. 15.12-13p3)
K16Y00M 2016 YM (arc=3 opp, H=22.0 ~135m) from ATLAS Mauna Loa (Dec. 14.40-41p4) and Northolt Branch Obs. (Dec. 15.01-03p5)
K09W11D 2009 WD11 (arc=2 opp, H=22.0 ~135m) from CSS (Dec. 14.22-24p4)
Observations of other objects
K20X04D 2020 XD4 (i=38.8°, arc=6 days, H=20.2 ~309m) from Holmes/CTIO (Dec. 15.20p3 at G=22.1-2)
K20X03Z 2020 XZ3 (arc=5 days, H=20.7 ~245m) from Mt. John Obs. (Dec. 14.62-63p4)
K20X03Y 2020 XY3 (arc=6 days, H=20.4 ~282m) from Bok Tel. (Dec. 14.33-35p4) and Steward Mt. Lemmon Sta. (Dec. 15.43-47p4)
K20X03L 2020 XL3 (arc=5 days, H=21.2 ~195m) from GINOP-KHK (Dec. 14.10p3) and ATLAS Mauna Loa (Dec. 14.47-50p4)
K20X01N 2020 XN1 (i=36.8°, Q=4.002 AU, arc=27 days, H=19.7 ~389m) from MLS (Dec. 14.17-18p4), CSS (Dec. 14.35p1), ATLAS Mauna Loa (Dec. 14.43-48p4), and Holmes/CTIO (Dec. 15.20-21p3)
K20W05S 2020 WS5 (i=40.9°, Q=4.050 AU, arc=18 days, H=20.8 ~234m) from MLS (Dec. 14.17-18p4), ATLAS Mauna Loa (Dec. 14.43-48p4), and Galhassin RT (Dec. 14.83-90p4)
K20W02H 2020 WH2 (Q=4.562 AU, arc=26 days, H=20.1 ~323m) from MLS (Dec. 14.43-44p4)
K20W01Z 2020 WZ1 (i=45.2°, arc=27 days, H=20.4 ~282m) from Holmes/CTIO (Dec. 14.30-31p3)
K20W01P 2020 WP1 (i=38.7°, arc=35 days, H=20.2 ~309m) from Mt. John Obs. (Dec. 14.61p3)
K20W01L 2020 WL1 (arc=28 days, H=19.9 ~355m) from MLS (Dec. 14.43-44p4)
K20V06Q 2020 VQ6 (arc=29 days, H=21.1 ~204m) from ATLAS Mauna Loa (Dec. 14.43-45p5)
K20U04R 2020 UR4 (Q=4.172 AU, arc=63 days, H=20.1 ~323m) from PS1 (Dec. 15.26-29p4 at w=21.8-22.2)
K20T07C 2020 TC7 (arc=62 days, H=19.6 ~407m) from Holmes/CTIO (Dec. 15.07p3)
K20T06N 2020 TN6 (arc=4 opp, H=19.1 ~513m) from Bok Tel. (Dec. 14.25-26p4 at G=22.0-22.5)
K20T04G 2020 TG4 (Q=4.171 AU, arc=87 days, H=20.1 ~323m) from BAS Obs. (Dec. 13.88-89p3), ATLAS Mauna Loa (Dec. 14.44-45p3), and Squirrel Valley Obs. (Dec. 15.09-11p3)
K20T02M 2020 TM2 (arc=68 days, H=21.1 ~204m) from Holmes/CTIO (Dec. 15.10-11p3)
K20S03F 2020 SF3 (Q=4.371 AU, arc=95 days, H=21.6 ~162m) from Bok Tel. (Dec. 14.27-29p4 at G=21.7-22.4)
K20S01K 2020 SK1 (arc=109 days, H=21.0 ~214m) from Bok Tel. (Dec. 14.43-45p4)
K20Q07R 2020 QR7 (arc=121 days, H=19.0 ~537m) from Holmes/CTIO (Dec. 15.04-05p3 at G=22.0-22.1)
K20Q06Q 2020 QQ6 (Q=4.107 AU, arc=123 days, H=19.8 ~371m) from MLS (Dec. 14.15-16p4)
K20Q03Z 2020 QZ3 (arc=119 days, H=20.9 ~224m) from Spacewatch 1.8m (Dec. 14.07-10p3 at G=22.2-8)
K20P05C 2020 PC5 (Q=4.177 AU, arc=123 days, H=18.5 ~676m) from ATLAS Haleakala (Dec. 14.31-33p4) and Holmes/CTIO (Dec. 15.08-09p3)
K20N01L 2020 NL1 (arc=153 days, H=19.8 ~371m) from Holmes/CTIO (Dec. 15.06-07p3 at G=22.0-22.1)
K20L03B 2020 LB3 (arc=2 opp, H=19.6 ~407m) from MLS (Dec. 14.13-14p4) and PS1 (Dec. 15.28-30p3)
K20H09Z 2020 HZ9 (i=40.2°, arc=2 opp, H=18.6 ~645m) from Holmes/CTIO (Dec. 15.16-17p3)
K18K02M 2018 KM2 (arc=3 opp, H=20.3 ~295m) from MLS (Dec. 14.36-38p4) and ATLAS Mauna Loa (Dec. 14.52-58p4)
K16O05P 2016 OP5 (arc=4 opp, H=20.9 ~224m) from Lumezzane Obs. (Dec. 12.80p2)
K16L08V 2016 LV8 from NEOWISE (Dec. 11.53p1, 11.66p1, 11.73p2, 11.79p1 & 11.86p1)
K16J33U 2016 JU33 (arc=3 opp, H=20.8 ~234m) from CSS (Dec. 14.26p1)
K16GM0N 2016 GN220 (arc=3 opp, H=18.9 ~562m) from MLS (Dec. 14.30-32p4 at G=21.39-22.48)
K16E85D 2016 ED85 (Q=5.062 AU, arc=3 opp, H=17.7 ~977m) from ATLAS Mauna Loa (Dec. 14.61-63p4)
K15B04F 2015 BF4 (arc=6 opp, H=20.5 ~269m) from MLS (Dec. 14.21-22p3), CSS (Dec. 14.27-29p4), and ATLAS Mauna Loa (Dec. 14.34-37p4)
K13U14X 2013 UX14 (arc=4 opp, H=18.3 ~741m) from Piobbico Obs. (Dec. 14.91-92p2)
K12S22A 2012 SA22 (arc=3 opp, H=18.2 ~776m) from ATLAS Mauna Loa (Dec. 14.43-48p4)
K09K00K 2009 KK (arc=5 opp, H=20.5 ~269m) from Bok Tel. (Dec. 14.27-29p4)
K07A12C 2007 AC12 (Q=4.304 AU, arc=3 opp, H=18.3 ~741m) from PS1 (Dec. 15.22-25p4)
K06WC9G 2006 WG129 (arc=3 opp, H=20.6 ~257m) from CSS (Dec. 14.44-45p3)
K06UI5L 2006 UL185 (arc=6 opp, H=21.3 ~186m) from Spacewatch 0.9m (Dec. 15.25-27p3)
K06M00A 2006 MA (Q=4.052 AU, arc=4 opp, H=18.9 ~562m) from Tholen 2.24m (2010 April 6.45-46p2 at G=23.20-22)
K04L03U 2004 LU3 (arc=5 opp, H=18.4 ~708m) from Lumezzane Obs. (Dec. 12.87p2)
K03Y01M 2003 YM1 (arc=3 opp, H=18.1 ~812m) from CSS (Dec. 14.38-39p4) and ATLAS Mauna Loa (Dec. 14.47-50p4)
K03Y00J 2003 YJ (arc=4 opp, H=20.3 ~295m) from Squirrel Valley Obs. (Dec. 15.06-07p3) and Foxfire Village Obs. (Dec. 15.07-10p2)
K02T67S 2002 TS67 (arc=6 opp, H=19.1 ~513m) from CSS (Dec. 14.33-35p4) and ATLAS Mauna Loa (Dec. 14.41-45p4)
K02G08Z 2002 GZ8 (Q=4.633 AU, arc=4 opp, H=18.8 ~589m) from Berthelot Obs. (Dec. 2.75-88p12)
K00P27Q 2000 PQ27 (arc=3 opp, H=20.0 ~339m) from Bok Tel. (Dec. 14.21-23p4)
K00C33N 2000 CN33 (Q=4.128 AU, arc=3 opp, H=19.4 ~446m) from ATLAS Haleakala (Dec. 14.54-56p4)
J99H01V 1999 HV1 (arc=7 opp, H=17.5 ~1.07 km) from MLS (Dec. 14.26-27p4)
p2245 512245 2016 AU8 from MLS (Dec. 14.50-52p3)
o7355 507355 2011 VV5 from Pleasant Groves Obs. (Dec. 9.10-12p3)
m2566 482566 2012 WK4 from MLS (Dec. 14.32-34p3)
m0934 480934 2003 LX5 from Bok Tel. (Dec. 14.23-25p4 at G=21.7-23.0)
m0824 480824 1999 JO6 from MLS (Dec. 14.19-20p4)
l4554 474554 2003 YQ94 from ATLAS Mauna Loa (Dec. 14.28-30p4)
h8902 438902 2009 WF104 from ATLAS Mauna Loa (Dec. 14.46-49p4)
h4632 434632 2005 WE from MLS (Dec. 14.45-47p4)
g0302 420302 2011 XZ1 from MLS (Dec. 14.13-14p4)
f8416 418416 2008 LV16 from MLS (Dec. 14.28-29p4)
f6694 416694 2004 YR32 from Bok Tel. (Dec. 14.48-50p4) and ATLAS Mauna Loa (Dec. 14.50-51p4)
c5343 385343 2002 LV from MLS (Dec. 14.45-47p4)
a0502 360502 2003 EO16 from Mt. John Obs. (Dec. 13.43p1)
Z1331 351331 2004 XH29 from MLS (Dec. 14.15-17p4 at G=21.47-22.08)
Y5705 345705 2006 VB14 from Foxfire Village Obs. (Dec. 15.01-05p3)
V9988 319988 2007 DK from MLS (Dec. 14.10-12p4) and PS1 (Dec. 15.26-29p3)
U7493 307493 2002 XP90 from ATLAS Mauna Loa (Dec. 14.59-62p4)
U5090 305090 2007 VQ4 from ATLAS Mauna Loa (Dec. 14.62-65p4)
U2591 302591 2002 QE7 from MLS (Dec. 14.32-34p4)
R5714 275714 2000 YH4 from Foxfire Village Obs. (Dec. 15.06-09p3)
P6412 256412 2007 BT2 from PS1 (Dec. 15.22-25p4)
K3471 203471 2002 AU4 from MLS (Dec. 14.50-52p4)
J8752 198752 2005 EA60 from MLS (Dec. 14.48-49p3)
J0208 190208 2006 AQ from NEOWISE (Dec. 11.91p1, 12.04p1, 12.17p2, 12.30p1, 12.43p1, 12.57p1, 12.70p1, 12.76p1, 12.83p1, 12.89p1, 12.96p1, 13.02p1, 13.09p1, 13.15p1, 13.28p1, 13.55p1, 13.68p1, 13.81p1 & 13.94p1)
I8452 188452 2004 HE62 from the Zwicky Transient Facility (ZTF) (Dec. 14.08p1 & 15.08-09p3)
I6822 186822 2004 FE31 from ATLAS Haleakala (Dec. 14.34-36p4)
G3902 163902 2003 SW222 from Northolt Branch Obs. (Dec. 14.99p3)
G3364 163364 2002 OD20 from Squirrel Valley Obs. (Dec. 15.02-04p3)
G3014 163014 2001 UA5 from PS1 (Dec. 15.21-24p3)
G2186 162186 1999 OP3 from ATLAS Mauna Loa (Dec. 14.51-53p4)
G2173 162173 Ryugu (1999 JU3) from ATLAS Haleakala (Dec. 14.24-27p3)
G2039 162039 1996 JG from ATLAS Mauna Loa (Dec. 14.42-46p8)
F9402 159402 1999 AP10 from program code 1 via Kuban State Univ. Obs. (Dec. 14.69p3 & 14.79p3)
F4302 154302 2002 UQ3 from ATLAS Haleakala (Dec. 14.27-28p3)
F4007 154007 2002 BY from MLS (Dec. 14.21-23p4 at G=21.05-22.15)
F3306 153306 2001 JL1 from MLS (Dec. 14.10-12p4)
F3201 153201 2000 WO107 from Berthelot Obs. (Dec. 3.72-75p5), Lumezzane Obs. (Dec. 12.84p4), BAS Obs. (Dec. 13.82p3), CSS (Dec. 14.26-28p4), ATLAS Mauna Loa (Dec. 14.34-36p4), and Geyserland Obs. (Dec. 14.45-46p2)
E1053 141053 2001 XT1 from MLS (Dec. 14.45-47p4)
D8971 138971 2001 CB21 from Bok Tel. (Dec. 14.50-52p4)
D8095 138095 2000 DK79 from BAS Obs. (Dec. 13.71-72p3) and ATLAS Haleakala (Dec. 14.22-24p3)
A8519 108519 2001 LF from MLS (Dec. 14.28-29p4)
99935 99935 2002 AV4 from ATLAS Mauna Loa (Dec. 14.51-54p7) and Transit Dreams Obs. (Dec. 15.26-28p3)
89355 89355 2001 VS78 from ATLAS Mauna Loa (Dec. 14.47-50p4)
87684 87684 2000 SY2 from ATLAS Haleakala (Dec. 14.27-29p4)
85709 85709 1998 SG36 from ATLAS Haleakala (Dec. 14.64-67p4)
85275 85275 1994 LY from ATLAS Haleakala (Dec. 14.35-37p4)
68950 68950 2002 QF15 from ZTF (Dec. 14.07-08p2 & 15.07-09p4)
68359 68359 2001 OZ13 from Transit Dreams Obs. (Dec. 15.18-19p3)
65717 65717 1993 BX3 from ATLAS Haleakala (Dec. 14.34-36p4) and Mt. John Obs. (Dec. 14.50p3)
55532 55532 2001 WG2 from Transit Dreams Obs. (Dec. 15.14-16p3)
53435 53435 1999 VM40 from Kuban State Univ. Obs. (Dec. 14.80-93p73) and Kuban State Univ. Obs./code 1 (Dec. 14.80-93p73)
36183 36183 1999 TX16 from ATLAS Haleakala (Dec. 14.23-25p4)
35107 35107 1991 VH from ATLAS Haleakala (Dec. 14.21-23p3)
23183 23183 2000 OY21 from ATLAS Mauna Loa (Dec. 14.60-62p4)
21088 21088 Chelyabinsk (1992 BL2) from ATLAS Mauna Loa (Dec. 14.50-52p4) and Transit Dreams Obs. (Dec. 15.23-25p3)
17182 17182 1999 VU from SATINO-1 (Sept. 13.99-00p4)
16834 16834 1997 WU22 from ATLAS Mauna Loa (Dec. 14.33-36p4)
11405 11405 1999 CV3 from ATLAS Haleakala (Dec. 14.21-23p4)
10115 10115 1992 SK from ATLAS Mauna Loa (Dec. 14.33-37p4)
09172 9172 Abhramu (1989 OB) from Lumezzane Obs. (Dec. 12.76-77p2)
08566 8566 1996 EN from ATLAS Haleakala (Dec. 14.24-26p4)
07977 7977 1977 QQ5 from ATLAS Haleakala (Dec. 14.20-22p3)
07753 7753 1988 XB from ATLAS Mauna Loa (Dec. 14.41-45p3) and Transit Dreams Obs. (Dec. 15.21-22p3)
06239 6239 Minos (1989 QF) from MLS (Dec. 14.10-12p4)
06053 6053 1993 BW3 from BAS Obs. (Dec. 13.69-70p3)
05879 5879 Almeria (1992 CH1) from ATLAS Haleakala (Dec. 14.50-52p4)
05836 5836 1993 MF from ATLAS Mauna Loa (Dec. 14.43-45p4)
05131 5131 1990 BG from ATLAS Mauna Loa (Dec. 14.60-62p3)
04953 4953 1990 MU from ATLAS Haleakala (Dec. 14.25-27p4)
04450 4450 Pan (1987 SY) from MLS (Dec. 14.13-14p4) and PS1 (Dec. 15.26-30p4)
04055 4055 Magellan (1985 DO2) from ATLAS Haleakala (Dec. 14.35-37p4)
03908 3908 Nyx (1980 PA) from Foxfire Village Obs. (Dec. 15.02-04p2)
03360 3360 Syrinx (1981 VA) from MLS (Dec. 14.32-34p4)
02368 2368 Beltrovata (1977 RA) from ATLAS Mauna Loa (Dec. 14.44-48p4)
02212 2212 Hephaistos (1978 SB) from ATLAS Mauna Loa (Dec. 14.31-33p4)
01866 1866 Sisyphus (1972 XA) from ATLAS Mauna Loa (Dec. 14.63-66p4)
01580 1580 Betulia (1950 KA) from ATLAS Mauna Loa (Dec. 14.37-39p4)
01036 1036 Ganymed (1924 TD) from ATLAS Haleakala (Dec. 14.39-42p4)
00887 887 Alinda (1918 DB) from ATLAS Haleakala (Dec. 14.27-29p4)

MPEC 2020-X179 - "01:01 UT" - 2020 XW5

K20X05W 2020 XW5 (small asteroid, H=24.91 ~35m) was picked up at 0707 UT on 14 Dec. by MLS, observing it at Dec. 7.39p2 and 14.30-31p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Dec. 14.40p4) and Visnjan Obs. (Dec. 14.80-81p4).

Observers on 15 December '20

A total of 42 observers appear in today's MPECs.

Code	Observer / observatory
`L74`	AstroColauri Obs., 1 in MPEC 2020-X184 -- 2020 XA6
`H21`	Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2020-X180 & 2020-X184 -- 2020 XW5, 2020 XA6
`T05`	ATLAS Haleakala in Hawaii, 20 in MPEC 2020-X180 -- 2020 PC5, 2000 CN33, 87684, 85709, 85275, 65717, 36183, 35107, 186822, 162173, 154302, 138095, 11405, 8566, 7977, 5879, 4953, 4055, 1036, 887
`T08`	ATLAS Mauna Loa in Hawaii, 36 in MPEC 2020-X180 -- 2020 XN2, 2020 XN1, 2020 XL3, 2020 XH1, 2020 WS5, 2020 VQ6, 2020 TG4, 2018 KM2, 2016 YM, 2016 ED85, 2015 BF4, 2012 SA22, 2003 YM1, 2002 TS67, 99935, 89355, 474554, 438902, 416694, 307493, 305090, 23183, 21088, 16834, 163693, 162186, 162039, 153201, 10115, 7753, 5836, 5131, 2368, 2212, 1866, 1580
`G17`	BAS Obs., 5 in MPEC 2020-X180 -- 2020 XH1, 2020 TG4, 153201, 138095, 6053
`L54`	Berthelot Obs., 2 in MPEC 2020-X180 -- 2002 GZ8, 153201
`V00`	Bok Telescope in Arizona, 11 in MPEC 2020-X180 -- 2020 XY3, 2020 WG3, 2020 VE, 2020 TN6, 2020 SK1, 2020 SF3, 2009 KK, 2000 PQ27, 480934, 416694, 138971
`703`	Catalina Sky Survey (CSS) in Arizona, 12 in MPEC 2020-X180 -- 2020 XN2, 2020 XN1, 2020 XH1, 2020 XF4, 2016 JU33, 2015 BF4, 2013 YS2, 2009 WD11, 2006 WG129, 2003 YM1, 2002 TS67, 153201
`309&`	Marco Micheli via Cerro Paranal in Chile, 1 in MPEC 2020-X181 -- 1998 KY26
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 30 in MPEC 2020-X180 -- 2020 XV4, 2020 XV2, 2020 XO2, 2020 XN1, 2020 XK3, 2020 XH4, 2020 XG4, 2020 XF3, 2020 XE5, 2020 XD4, 2020 XC3, 2020 XA5, 2020 XA3, 2020 WZ1, 2020 WY2, 2020 WU2, 2020 WO3, 2020 WK3, 2020 VY1, 2020 VM6, 2020 VF2, 2020 TM2, 2020 TC7, 2020 TB12, 2020 SS2, 2020 RO6, 2020 QR7, 2020 PC5, 2020 NL1, 2020 HZ9
`Z99`	Clixby Obs. in England, 1 in MPEC 2020-X184 -- 2020 XA6
`K87`	Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2020-X184 -- 2020 XA6
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2020-X184 -- 2020 XA6
`K83`	Forti Obs., 1 in MPEC 2020-X184 -- 2020 XA6
`W46`	Foxfire Village Obs., 4 in MPEC 2020-X180 -- 2003 YJ, 345705, 275714, 3908
`L34`	Galhassin Robotic Telescope, 2 in MPECs 2020-X180 & 2020-X184 -- 2020 XA6, 2020 WS5
`E89`	Geyserland Obs. in New Zealand, 1 in MPEC 2020-X180 -- 153201
`K88`	GINOP-KHK in Hungary, 2 in MPEC 2020-X180 -- 2020 XL3, 2020 PK7
`J95`	Great Shefford Obs. in England, 2 in MPECs 2020-X180 & 2020-X184 -- 2020 XX3, 2020 XA6
`C40`	Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-X180 -- 53435
`C401`	program code 1 via Kuban State Univ. Obs. in Russia, 2 in MPEC 2020-X180 -- 53435, 159402
`598`	Loiano Obs. in Italy, 1 in MPEC 2020-X182 -- 2020 XY5
`130`	Lumezzane Obs. in Italy, 6 in MPEC 2020-X180 -- 2020 XN2, 2020 VC7, 2016 OP5, 2004 LU3, 153201, 9172
`568<`	program code "<" (37) on Mauna Kea in Hawaii, 1 in MPEC 2020-X181 -- 1998 KY26
`474`	Mt. John Obs. in New Zealand, 8 in MPEC 2020-X180 -- 2020 XZ3, 2020 XE5, 2020 WT5, 2020 WP1, 2020 WE4, 2020 VM6, 65717, 360502
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 39 in MPECs 2020-X179, 2020-X180, 2020-X182, 2020-X183 & 2020-X184 -- 2020 XZ5, 2020 XY5, 2020 XY4, 2020 XW5, 2020 XP, 2020 XN1, 2020 XJ, 2020 XH1, 2020 XA6, 2020 WS5, 2020 WL1, 2020 WH2, 2020 WF3, 2020 WC3, 2020 QQ6, 2020 LB3, 2018 KM2, 2016 GN220, 2015 BF4, 1999 HV1, 512245, 482566, 480824, 434632, 420302, 418416, 385343, 351331, 319988, 302591, 203471, 198752, 154007, 153306, 141053, 108519, 6239, 4450, 3360
`C51`	NEOWISE in Earth polar orbit, 2 in MPEC 2020-X180 -- 2016 LV8, 190208
`Z80`	Northolt Branch Obs. in England, 2 in MPEC 2020-X180 -- 2016 YM, 163902
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 9 in MPECs 2020-X180 & 2020-X183 -- 2020 XZ5, 2020 UR4, 2020 LB3, 2007 AC12, 319988, 256412, 190166, 163014, 4450
`F52`	Pan-STARRS 2 in Hawaii, 1 in MPEC 2020-X183 -- 2020 XZ5
`K63`	Pascoli Obs. in Italy, 2 in MPECs 2020-X180 & 2020-X184 -- 2020 XS5, 2020 XA6
`L47`	Piobbico Obs., 1 in MPEC 2020-X180 -- 2013 UX14
`W16`	Pleasant Groves Obs., 1 in MPEC 2020-X180 -- 507355
`C95`	SATINO-1 in France, 1 in MPEC 2020-X180 -- 17182
`0331`	program code 1 via Schwarzschild Obs. in Germany, 8 in MPECs 2020-X180 & 2020-X184 -- 2020 XX3, 2020 XW5, 2020 XW, 2020 XP2, 2020 XJ3, 2020 XE4, 2020 XA6, 2020 WZ5
`691`	Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2020-X180 -- 2020 XX3, 2020 XD5, 2006 UL185, 2006 RJ1
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2020-X180 -- 2020 XX3, 2020 XD1, 2020 XC, 2020 QZ3
`W34`	Squirrel Valley Obs. in North Carolina, 4 in MPECs 2020-X180 & 2020-X184 -- 2020 XA6, 2020 TG4, 2003 YJ, 163364
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 6 in MPECs 2020-X179, 2020-X180, 2020-X182 & 2020-X184 -- 2020 XY5, 2020 XY3, 2020 XW5, 2020 XV4, 2020 XA6, 2020 SO
`W33`	Transit Dreams Obs., 7 in MPECs 2020-X180 & 2020-X184 -- 2020 XA6, 2011 GD60, 99935, 68359, 55532, 21088, 7753
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2020-X180 & 2020-X181 -- 2006 MA, 1998 KY26
`L01`	Visnjan Obs. in Croatia, 3 in MPECs 2020-X179, 2020-X182 & 2020-X184 -- 2020 XY5, 2020 XW5, 2020 XA6
`I41`	Zwicky Transient Facility (ZTF) in southern California, 2 in MPEC 2020-X180 -- 68950, 188452

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

Impact Risk Monitoring on 15 December '20

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2359 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 XA6	JPL Sentry	2100	2065-2074	7	1.741374e-05	-3.99	-4.21	0	JPL: Computed at 12:35 today Pacific time based on 55 observations spanning 1.6318 days (2020-Dec-14.124162 to 2020-Dec-15.755939). Diameter approximately 0.053 km. from weighted mean H=24.02.

2020 XK5	NEODyS	1700	2110-2114	2	3.61e-09	-8.13	-8.13	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2020-12-12.388 to 2020-12-14.540."

2020 XD5	JPL Sentry	1700	R E M O V E D						JPL: Risk listing removed at 1432 UTC today

2020 XF4	JPL Sentry	1700	2093-2119	9	2.729255e-06	-7.17	-7.55	0	JPL: Computed at 06:40 today Pacific time based on 56 observations spanning 9.8162 days (2020-Dec-05.43588 to 2020-Dec-15.252128). Diameter approximately 0.011 km. from weighted mean H=27.45.
2020 XF4	NEODyS	1700	2104-2119	12	2.74e-06	-7.18	-7.42	0	NEODyS: "Based on 56 optical observations (of which 0 are rejected as outliers) from 2020-12-05.437 to 2020-12-15.253."

2020 XX3	JPL Sentry	1700	2086-2119	20	6.2245583e-05	-6.26	-6.38	0	JPL: Computed at 06:36 today Pacific time based on 50 observations spanning 4.9705 days (2020-Dec-10.276407 to 2020-Dec-15.24689). Diameter approximately 0.007 km. from weighted mean H=28.55.
2020 XX3	NEODyS	1700	2086-2120	19	6.39e-05	-6.24	-6.31	n/a	NEODyS: "Based on 50 optical observations (of which 0 are rejected as outliers) from 2020-12-10.277 to 2020-12-15.248."

2020 XC	JPL Sentry	1700	2085-2085	1	6.869e-07	-8.43	-8.43	0	JPL: Computed at 06:07 today Pacific time based on 51 observations spanning 10.957 days (2020-Dec-03.36221 to 2020-Dec-14.31914). Diameter approximately 0.005 km. from weighted mean H=29.00.
2020 XC	NEODyS	1700	2085-2117	2	7.4e-07	-8.41	-8.42	0	NEODyS: "Based on 51 optical observations (of which 0 are rejected as outliers) from 2020-12-03.363 to 2020-12-14.320."

2019 YS	JPL Sentry	1700	2089-2116	12	7.1691e-07	-9.66	-10.33	0	JPL: Computed at 07:04 Dec. 21st of 2019 Pacific time based on 22 observations spanning 1.7203 days (2019-Dec-19.234699 to 2019-Dec-20.954973). Diameter approximately 0.002 km. from weighted mean H=31.51.

2015 XR169	JPL Sentry	1700	2050-2119	146	5.2294234e-05	-6.32	-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.

2011 SL189	JPL Sentry	1700	2043-2100	5	8.634e-10	-8.79	-9.32	0	JPL: Computed at 20:50 April 22nd of 2017 Pacific time based on 11 observations spanning .91578 days (2011-Sep-29.31662 to 2011-Sep-30.2324). Diameter approximately 0.040 km. from weighted mean H=24.63.

2010 WW8	JPL Sentry	1700	2021-2112	81	1.35367e-07	-6.97	-7.43	0	JPL: Computed at 11:07 April 9th of 2017 Pacific time based on 12 observations spanning .06622 days (2010-Nov-30.37333 to 2010-Nov-30.43955). Diameter approximately 0.018 km. from weighted mean H=26.41.

2004 XO63	JPL Sentry	1700	2065-2065	1	7.276e-08	-7.72	-7.72	0	JPL: Computed at 21:46 April 18th of 2017 Pacific time based on 39 observations spanning 5.9306 days (2004-Dec-15.18718 to 2004-Dec-21.11781). Diameter approximately 0.021 km. from weighted mean H=26.08.

2001 YN2	JPL Sentry	1700	R E M O V E D						JPL

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 15 December '20

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

2100	Noted that JPL Sentry has posted 2020 XA6 as an impact risk - see above
2000	Grabbed MPEC 2020-X184 - 2020 XA6 - see above
1800	Grabbed MPEC 2020-X182 - 2020 XY5 - see above Grabbed MPEC 2020-X183 - 2020 XZ5 - see above
1700	Noted that JPL Sentry has removed 2001 YN2 as an impact risk - see above Noted that JPL Sentry has updated its 2004 XO63 risk assessment - see above Noted that JPL Sentry has updated its 2010 WW8 risk assessment - see above Noted that JPL Sentry has updated its 2011 SL189 risk assessment - see above Noted that JPL Sentry has updated its 2015 XR169 risk assessment - see above Noted that JPL Sentry has updated its 2019 YS risk assessment - see above Noted that JPL Sentry has updated its 2020 XC risk assessment - see above Noted that NEODyS has updated its 2020 XC risk assessment - see above Noted that JPL Sentry has removed 2020 XD5 as an impact risk - see above Noted that JPL Sentry has updated its 2020 XF4 risk assessment - see above Noted that NEODyS has updated its 2020 XF4 risk assessment - see above Noted that NEODyS has posted 2020 XK5 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 Grabbed MPEC 2020-X180 - Daily Orbit Update - see above Grabbed MPEC 2020-X181 - 1998 KY26 - see above
0545	Grabbed MPEC 2020-X179 - 2020 XW5 - see above

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