2020-12-03 Tracking News

Contents on 3 December '20

IAU Minor Planet Center
- NEOCP Activity -- eleven listings
- New MPECs -- six MPECs
Observers -- 48 observers
Impact Risk Monitoring -- four objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1225 risk-listed objects, 185 have had news in the last 31 days. Updated at 1733 UTC on 3 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 3 December '20

The MPC's NEO Confirmation Page has 11 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eleven objects listed. Of these, seven were "one nighters." So far The Tracking News has counted a total of seventeen 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 3 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-X05 time-stamped "12:11 UT" - Daily Orbit Update - see below
MPEC 2020-X06 time-stamped "12:53 UT" - 2020 XA - see below
MPEC 2020-X07 time-stamped "12:55 UT" - 2020 XB - see below
MPEC 2020-X08 time-stamped "12:57 UT" - 2020 WT5 - see below
MPEC 2020-X09 time-stamped "18:03 UT" - 2016 YM - see below
MPEC 2020-X10 time-stamped "22:56 UT" - Comet P/2005 CR16 = 2003 WR168 = 2020 W2 (NEAT-LINEAR)

MPEC 2020-X10 - "22:56 UT" - Comet P/2005 CR16 = 2003 WR168 = 2020 W2 (NEAT-LINEAR)

PK20W020 P/2020 W2 (NEAT-LINEAR) (q=3.247 AU, Q=10.008 AU, TP=2021 June 23.64225 TT) was picked up at 0816 UT on 16 Nov. by the Mt. Lemmon Survey (MLS), observing it at Aug. 29.47-49p4, Sept. 21.43-45p3, Oct. 16.33-35p4, Nov. 5.45-47p4, 16.35-36p4, and 25.13-14p4. This detection was confirmed by Pan-STARRS 2 (PS2) (Oct. 14.41-44p4, 19.49-51p3 & 24.51-55p4), Steward Obs. Mt. Lemmon Station (Nov. 16.44-47p4), Hidetaka Sato via iTelescope Obs. Mayhill (Nov. 17.19-20p3), McDonald Obs. (Nov. 17.20p3 & 18.21-22p3), GROWTH India Telescope (Nov. 17.66-68p5), Visnjan Obs. (Nov. 17.97-99p2), program code 1 via KLENOT (Nov. 18.80p5 & 21.90p5), Pascoli Obs. (Nov. 18.84-85p2), Rokycany Obs. (Nov. 18.85p3), Schiaparelli Obs. (Nov. 18.97-00p3), Tebbutt Obs. (Nov. 20.19-23p3 & 26.13-15p2), the Spacewatch 0.9m telescope (Nov. 20.29-31p3), Sormano2 Obs. (Nov. 21.89p2), Buchloe Obs. (Nov. 21.90-91p3), Paus Obs. (Nov. 21.90-92p2), Salvatore di Giacomo Obs. (Nov. 23.78-80p2), Farra d'Isonzo Obs. (Nov. 30.86-88p2), and Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Dec. 1.16-17p3).
PK05C16R P/2005 CR16 was picked up at 0655 UT on 2 Feb. 2005 by LINEAR, observing it at 2005 Feb. 2.29-33p3. This detection was confirmed by Spacewatch 0.9m (2005 Jan. 17.43-49p3, 2005 Feb. 4.24-30p3 & 2005 March 4.12-15p3), LONEOS (2005 Feb. 9.23-27p4), MLS (2005 March 8.20-22p4 & 2005 March 10.24-26p4), Catalina Station (2005 March 8.22-23p3 & 2005 April 4.19-21p4), Mauna Kea (2005 April 11.29-34p3), and La Silla (2005 May 13.99-00p6).
PK03WG8R P/2003 WR168 was picked up at 0835 UT on 19 Nov. 2003 by NEAT's Mt. Palomar telescope, observing it at 2003 Nov. 19.36-42p6. This detection was confirmed by LONEOS (2003 Nov. 21.33-38p4).

MPEC 2020-X09 - "18:03 UT" - 2016 YM

K16Y00M 2016 YM (borderline-small, H=22.0 ~135m) from Pan-STARRS 1 (PS1) (2012 Dec. 28.22-23p2 & 2013 Jan. 16.32-33p2) and ATLAS Mauna Loa (Dec. 3.45p4)

MPEC 2020-X08 - "12:57 UT" - 2020 WT5

K20W05T 2020 WT5 (small asteroid, Earth MOID=7.2 LD, H=22.3 ~117m) was picked up at 2137 UT on 29 Nov. by NEOWISE, observing it at Nov. 29.90p1, 30.03p1, 30.16p1, 30.23p1, 30.29p1, 30.36p1, 30.42p1, 30.56p1, 30.62p1, 30.69p1, 30.75p1, 30.82p1, 30.88p1, Dec. 1.01p1, and 1.27p1. This detection was confirmed by Holmes/CTIO (Dec. 1.13-15p3) and LCO Sutherland C (Dec. 2.85-86p3).

MPEC 2020-X07 - "12:55 UT" - 2020 XB

K20X00B 2020 XB (Q=4.059 AU, Earth MOID=2.1 LD, H=25.3 ~29m) was picked up at 0940 UT on 1 Dec. by the Zwicky Transient Facility (ZTF), observing it at Dec. 1.40p2, 1.47p2, and 1.54p12. This detection was confirmed by GINOP-KHK (Dec. 1.91-93p8) and Paus Obs. (Dec. 2.97-98p4).

MPEC 2020-X06 - "12:53 UT" - 2020 XA

K20X00A 2020 XA (small asteroid, H=23.5 ~68m) was picked up at 0436 UT on 2 Dec. by MLS, observing it at Dec. 2.19-21p3. This detection was confirmed by the Catalina Sky Survey (CSS) (Nov. 23.18-19p2), Steward Mt. Lemmon Sta. (Dec. 2.28p4, 2.34p2 & 3.05-06p3), Squirrel Valley Obs. (Dec. 2.98-00p3), and Mountainville Obs. (Dec. 3.07-13p3).

<< DOU on 3 December '20 >> MPEC 2020-X05 - "12:11 UT" - Daily Orbit Update

Observations of risk-listed objects
K20W05L 2020 WL5 (Q=4.010 AU, arc=5 days, H=21.3 ~186m) from Steward Mt. Lemmon Sta. (Dec. 3.06p4)
Observations of recently (no longer) risk-listed objects
K20W00G 2020 WG (arc=17 days, H=21.6 ~162m) from Steward Mt. Lemmon Sta. (Dec. 3.19-20p4)
Observations of close-passing objects
K20W04B 2020 WB4 (arc=8 days, H=26.6 ~16m) from Transit Dreams Obs. (Dec. 2.01-02p3)
K20V06Z 2020 VZ6 (arc=18 days, H=25.0 ~34m) from Transit Dreams Obs. (Dec. 1.99-00p3) and ZTF (Dec. 2.30p2 & 2.40p2)
K20T12B 2020 TB12 (arc=49 days, H=21.6 ~162m) from the Spacewatch 1.8m telescope (Dec. 3.24-26p3)
K17W16J 2017 WJ16 (Q=0.999 AU, arc=2 opp, H=24.5 ~43m, NHATS target) from Muensterschwarzach Obs. (Nov. 29.73-74p5), MLS (Dec. 2.15-17p4), and Squirrel Valley Obs. (Dec. 3.02-03p3)
Observation campaigns (NHATS targets, radar support)
K20W00O 2020 WO (arc=17 days, H=25.9 ~22m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 3.10p3)
K20V05X 2020 VX5 (arc=20 days, H=23.4 ~71m, NHATS) from Steward Mt. Lemmon Sta. (Dec. 3.21p4)
K20S00O 2020 SO (NHATS) from Northolt Branch Obs. (Nov. 30.95-98p6), Chelmsford Obs. (Nov. 30.96p2 & Dec. 1.02p1), roving observer (Dec. 1.03-05p2), and Steward Mt. Lemmon Sta. (Dec. 3.07p4)
K06R01J 2006 RJ1 (arc=4 opp, H=22.2 ~123m, NHATS) from PS1 (Dec. 2.46-50p2)
E3404 143404 2003 BD44 (radar) from program code 3 via ESA Optical Ground Station (ESA OGS) (Nov. 20.04-05p2)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20W03O 2020 WO3 (arc=23 days, H=23.2 ~78m) from Steward Mt. Lemmon Sta. (Dec. 3.24p2)
K20W03E 2020 WE3 (arc=12 days, H=25.5 ~27m) from Steward Mt. Lemmon Sta. (Dec. 3.29p2)
K20W03C 2020 WC3 (arc=12 days, H=22.4 ~112m) from Steward Mt. Lemmon Sta. (Dec. 3.24-25p4)
K20W02F 2020 WF2 (Q=4.246 AU, arc=14 days, H=22.1 ~129m) from Steward Mt. Lemmon Sta. (Dec. 3.20p4)
K20W00V 2020 WV (arc=18 days, H=23.8 ~59m) from MLS (Dec. 2.26-27p3)
K20V03Q 2020 VQ3 (arc=23 days, H=23.0 ~85m) from PS1 (Dec. 2.47-50p4) and Steward Mt. Lemmon Sta. (Dec. 3.13p2)
K20V01X 2020 VX1 (arc=23 days, H=22.8 ~93m) from Spacewatch 0.9m (Dec. 3.22-26p3)
K20V00T 2020 VT (arc=29 days, H=25.3 ~29m) from Steward Mt. Lemmon Sta. (Dec. 3.26-27p3)
K20U02N 2020 UN2 (arc=47 days, H=22.5 ~107m) from PS2 (Dec. 2.28-31p4) and PS1 (Dec. 2.30-33p4)
K20U00D 2020 UD (arc=46 days, H=23.1 ~81m) from ESA OGS/code 3 (Nov. 20.04-05p2)
K20T07Q 2020 TQ7 (arc=74 days, H=22.1 ~129m) from Steward Mt. Lemmon Sta. (Dec. 2.54p1)
K18V01B 2018 VB1 (arc=2 opp, H=23.7 ~62m) from Paus Obs. (Dec. 2.77-80p2)
K20W02E 2020 WE2 (arc=22 days, H=21.8 ~148m) from Steward Mt. Lemmon Sta. (Dec. 3.16-18p3)
Observations of other objects
K20W05M 2020 WM5 (Q=4.714 AU, arc=4 days, H=21.4 ~178m) from program code "." (23) via Faulkes Telescope North (Dec. 2.56-57p4)
K20W05A 2020 WA5 (arc=7 days, H=21.4 ~178m) from Transit Dreams Obs. (Dec. 2.03p3)
K20W04J 2020 WJ4 (arc=18 days, H=20.9 ~224m) from Steward Mt. Lemmon Sta. (Dec. 2.50-51p3)
K20W03M 2020 WM3 (i=40.3°, arc=12 days, H=18.5 ~676m) from MLS (Dec. 2.43-45p4) and Steward Mt. Lemmon Sta. (Dec. 2.49-50p3)
K20W02H 2020 WH2 (Q=4.556 AU, arc=14 days, H=20.1 ~323m) from Steward Mt. Lemmon Sta. (Dec. 2.53p4)
K20W01J 2020 WJ1 (Q=4.616 AU, arc=19 days, H=19.7 ~389m) from PS1 (Dec. 2.56-59p3)
K20V05Z 2020 VZ5 (arc=18 days, H=21.0 ~214m) from Steward Mt. Lemmon Sta. (Dec. 2.50p4)
K20V05C 2020 VC5 (i=42.7°, Q=4.254 AU, arc=20 days, H=20.5 ~269m) from Steward Mt. Lemmon Sta. (Dec. 3.07-08p3)
K20V03N 2020 VN3 (arc=22 days, H=20.1 ~323m) from MLS (Dec. 2.34-36p4)
K20U06R 2020 UR6 (arc=82 days, H=20.8 ~234m) from Steward Mt. Lemmon Sta. (Dec. 2.54p3)
K20U06J 2020 UJ6 (arc=51 days, H=19.9 ~355m) from MLS (Dec. 2.36-38p4)
K20U01L 2020 UL1 (arc=55 days, H=20.1 ~323m) from Spacewatch 0.9m (Dec. 3.22-23p2)
K20T05H 2020 TH5 (arc=51 days, H=21.1 ~204m) from Steward Mt. Lemmon Sta. (Dec. 3.17-18p2)
K20Q04M 2020 QM4 (arc=105 days, H=18.6 ~645m) from PS1 (Dec. 2.29-33p4)
K20O08C 2020 OC8 (arc=169 days, H=20.8 ~234m) from Muensterschwarzach Obs. (Nov. 29.81p3) and Transit Dreams Obs. (Dec. 2.04-05p3)
K20O07S 2020 OS7 (Q=4.461 AU, arc=139 days, H=20.3 ~295m) from Steward Mt. Lemmon Sta. (Dec. 3.15p4)
K20O03W 2020 OW3 (Q=4.802 AU, arc=136 days, H=19.6 ~407m) from MLS (Dec. 2.24-25p4)
K17V12T 2017 VT12 (arc=4 opp, H=20.4 ~282m) from Muensterschwarzach Obs. (Nov. 29.78-79p4), MLS (Dec. 2.17-18p4), and CSS (Dec. 2.19-23p8)
K17S19E 2017 SE19 (arc=3 opp, H=19.8 ~371m) from Foxfire Village Obs. (Dec. 3.01-05p3)
K17B03K 2017 BK3 (arc=211 days, H=20.2 ~309m) from Spacewatch 1.8m (2017 April 1.27-28p2)
K16N00F 2016 NF (arc=3 opp, H=18.3 ~741m) from PS2 (Dec. 3.22-24p3)
K15B04F 2015 BF4 (arc=6 opp, H=20.4 ~282m) from CSS (Dec. 2.32-34p3)
K14L21W 2014 LW21 (Q=5.410 AU, arc=3 opp, H=18.6 ~645m) from IAS Obs. Hakos (Aug. 5.80-81p4, 5.87-88p5, 5.95-96p4, 10.81p1, 10.88-89p3, 10.96-97p3 & 11.79-91p7)
K14J57H 2014 JH57 (Q=6.247 AU, arc=5 opp, H=16.2 ~1.95 km) from ZTF (Dec. 2.55-56p4)
K13U14X 2013 UX14 (arc=4 opp, H=18.3 ~741m) from Squirrel Valley Obs. (Dec. 3.13-14p3) and Golden Ears Obs. (Dec. 3.20-21p3)
K13P06Y 2013 PY6 (arc=4 opp, H=19.3 ~467m) from CSS (Dec. 2.32-34p4) and ATLAS Mauna Loa (Dec. 2.48-51p4)
K10W03F 2010 WF3 (arc=4 opp, H=21.0 ~214m) from PS1 (Dec. 2.46-49p3)
K10R80N 2010 RN80 (arc=3 opp, H=20.1 ~323m) from PS1 (Dec. 3.21-23p3 at w=22.0-22.4)
K08CB8Z 2008 CZ118 (arc=4 opp, H=18.5 ~676m) from MLS (Dec. 2.21-23p4)
K07T08G 2007 TG8 (Q=4.305 AU, arc=3 opp, H=18.6 ~645m) from CSS (Dec. 2.48-49p2)
K05Q10S 2005 QS10 (arc=4 opp, H=18.8 ~589m) from NEOWISE (Nov. 30.56p1, 30.69p1, Dec. 1.08p1, 1.15p1, 1.21p1, 1.28p1, 1.35p1, 1.41p1, 1.48p1, 1.61p1, 1.67p1, 1.74p2, 2.06p1, 2.13p1 & 2.20p1)
K04A00C 2004 AC (arc=4 opp, H=18.9 ~562m) from MLS (Dec. 2.30-32p4), CSS (Dec. 2.35-37p4), and PS1 (Dec. 2.57-60p3)
K00P27Q 2000 PQ27 (arc=3 opp, H=20.0 ~339m) from PS2 (Dec. 2.29-31p3) and PS1 (Dec. 2.35-38p3)
J98W02A 1998 WA2 (Q=4.271 AU, arc=2 opp, H=19.9 ~355m) from PS1 (Dec. 2.51-55p3) and Squirrel Valley Obs. (Dec. 3.08-11p3)
r0938 530938 2011 XE from ATLAS Haleakala (Dec. 2.32-34p4)
m8693 488693 2003 WW87 from MLS (Dec. 2.47-50p4)
m1542 481542 2007 RF5 from PS1 (Dec. 3.23-25p3)
l4179 474179 1999 VS6 from CSS (Dec. 2.06-08p3) and MLS (Dec. 2.08-09p4)
j8062 458062 2009 YO from MLS (Dec. 2.19-21p3)
j5193 455193 2000 RJ60 from PS1 (Dec. 2.63-65p4)
j0259 450259 2003 WQ7 from PS1 (Dec. 2.63-64p3)
g8086 428086 2006 NM from CSS (Dec. 2.32-34p3), PS2 (Dec. 2.41-43p3), and ATLAS Mauna Loa (Dec. 2.44-47p4)
g0262 420262 2011 KD11 from PS1 (Dec. 2.42-44p3)
f7949 417949 2007 TB23 from MLS (Dec. 2.47-49p4)
f3260 413260 2003 TL4 from PS1 (Dec. 3.23-25p3)
e8752 408752 1991 TB2 from PS1 (Dec. 3.21-25p4)
c2395 382395 1990 SM from ZTF (Dec. 2.55-56p4)
c0929 380929 2006 HU30 from PS1 (Dec. 2.41-45p4)
c0359 380359 2002 TN30 from MLS (Dec. 2.32-34p4), CSS (Dec. 2.40-41p4), and PS1 (Dec. 2.57-62p4)
b8160 378160 2006 WX1 from Foxfire Village Obs. (Dec. 3.02-06p3)
Z4663 354663 2005 LY19 from MLS (Dec. 2.53-54p4)
U1011 301011 2008 JO from PS1 (Dec. 3.21-25p3)
R6274 276274 2002 SS41 from PS2 (Dec. 3.21-24p4)
R5714 275714 2000 YH4 from ATLAS Haleakala (Dec. 2.26-28p4)
Q7494 267494 2002 JB9 from MLS (Dec. 2.34-36p4) and PS1 (Dec. 2.57-58p2)
O2216 242216 2003 RN10 from MLS (Dec. 2.19-21p4)
N2382 232382 2003 BT47 from MLS (Dec. 2.53-54p4)
J4126 194126 2001 SG276 from PS1 (Dec. 2.42-44p3)
I6822 186822 2004 FE31 from ATLAS Haleakala (Dec. 2.33-35p4)
G4207 164207 2004 GU9 from PS1 (Dec. 2.63-65p4)
G3364 163364 2002 OD20 from CSS (Dec. 2.33-34p4) and ATLAS Mauna Loa (Dec. 2.49-51p4)
G2980 162980 2001 RR17 from PS1 (Dec. 3.21-25p4)
G2186 162186 1999 OP3 from ATLAS Mauna Loa (Dec. 2.55-58p4)
G2173 162173 Ryugu (1999 JU3) from ATLAS Mauna Loa (Dec. 2.30-32p4)
F9402 159402 1999 AP10 from CSS (Nov. 28.37-39p4 & Dec. 2.37-39p4) and PS1 (Nov. 28.55-59p8)
F5140 155140 2005 UD from PS1 (Dec. 2.29-31p3 & 2.42-45p4)
F4330 154330 2002 VX94 from CSS (Dec. 2.32-34p3), PS2 (Dec. 2.42-45p3), and ATLAS Mauna Loa (Dec. 2.44-47p4)
F4302 154302 2002 UQ3 from ATLAS Haleakala (Dec. 2.30-33p4)
F3249 153249 2001 BW15 from PS1 (Dec. 2.24-26p3)
F2978 152978 2000 GJ147 from ATLAS Mauna Loa (Dec. 2.43-45p4)
F2931 152931 2000 EA107 from ZTF (Dec. 2.55-56p4)
E4411 144411 2004 EW9 from CSS (Dec. 2.30-32p4) and ATLAS Mauna Loa (Dec. 2.42-45p8)
E3678 143678 2003 SA224 from MLS (Dec. 2.53-55p4)
E1052 141052 2001 XR1 from PS2 (Dec. 2.36-38p3)
D8095 138095 2000 DK79 from ATLAS Haleakala (Dec. 2.22-27p7)
D7062 137062 1998 WM from ZTF (Nov. 30.56p1)
99935 99935 2002 AV4 from PS2 (Dec. 2.54-58p4)
87684 87684 2000 SY2 from ATLAS Haleakala (Dec. 2.31-33p4)
87311 87311 2000 QJ1 from PS1 (Dec. 3.21-25p4)
85275 85275 1994 LY from ATLAS Haleakala (Dec. 2.37-41p4)
69230 69230 Hermes (1937 UB) from Hidetaka Sato via iTelescope Obs. Siding Spring (Nov. 9.41p2)
66251 66251 1999 GJ2 from PS1 (Dec. 3.21-24p4)
36284 36284 2000 DM8 from CSS (Dec. 2.06-08p3)
35107 35107 1991 VH from ATLAS Haleakala (Dec. 2.23-24p4)
31669 31669 1999 JT6 from ZTF (Dec. 2.55-57p5)
30825 30825 1990 TG1 from PS2 (Dec. 3.21-25p4)
24445 24445 2000 PM8 from ZTF (Dec. 2.55-56p5)
23187 23187 2000 PN9 from ATLAS Haleakala (Dec. 2.20-22p4)
21088 21088 Chelyabinsk (1992 BL2) from ATLAS Mauna Loa (Dec. 2.53-55p4)
16834 16834 1997 WU22 from ATLAS Mauna Loa (Dec. 2.43-45p4)
12538 12538 1998 OH from ATLAS Haleakala (Dec. 2.51-52p3)
11405 11405 1999 CV3 from ATLAS Haleakala (Dec. 2.23-25p5)
10150 10150 1994 PN from ATLAS Mauna Loa (Dec. 2.53-58p4)
10115 10115 1992 SK from CSS (Dec. 2.23-25p4), ATLAS Mauna Loa (Dec. 2.40-42p4), and PS1 (Dec. 2.42-45p4)
08014 8014 1990 MF from ESA OGS/code 3 (Nov. 20.03-07p4), PS2 (Dec. 2.46-49p4), and ATLAS Mauna Loa (Dec. 2.52-56p4)
07977 7977 1977 QQ5 from ATLAS Haleakala (Dec. 2.20-22p4)
07753 7753 1988 XB from ATLAS Haleakala (Nov. 25.61-64p4, 26.59-62p4 & 30.47-51p4)
07350 7350 1993 VA from ZTF (Dec. 2.55-56p4)
05645 5645 1990 SP from SATINO-1 (Aug. 6.11-13p3)
05131 5131 1990 BG from ATLAS Mauna Loa (Dec. 2.62-66p4)
04953 4953 1990 MU from ATLAS Haleakala (Dec. 2.29-31p4)
04055 4055 Magellan (1985 DO2) from ATLAS Haleakala (Dec. 2.37-41p4)
02329 2329 Orthos (1976 WA) from ZTF (Dec. 2.55-57p4)
01981 1981 Midas (1973 EA) from PS2 (Dec. 3.21-24p3)
01980 1980 Tezcatlipoca (1950 LA) from ATLAS Haleakala (Dec. 2.63-66p4)
01865 1865 Cerberus (1971 UA) from PS2 (Dec. 3.21-24p3)
00887 887 Alinda (1918 DB) from ATLAS Haleakala (Dec. 2.28-30p4)

Observers on 3 December '20

A total of 48 observers appear in today's MPECs.

Code	Observer / observatory
`T05`	ATLAS Haleakala in Hawaii, 17 in MPEC 2020-X05 -- 87684, 85275, 530938, 35107, 275714, 23187, 186822, 154302, 138095, 12538, 11405, 7977, 7753, 4953, 4055, 1980, 887
`T08`	ATLAS Mauna Loa in Hawaii, 15 in MPECs 2020-X05 & 2020-X09 -- 2016 YM, 2013 PY6, 428086, 21088, 16834, 163364, 162186, 162173, 154330, 152978, 144411, 10150, 10115, 8014, 5131
`215`	Buchloe Obs. in Germany, 1 in MPEC 2020-X10 -- P/2020 W2
`703`	Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2020-X05 & 2020-X06 -- 2020 XA, 2017 VT12, 2015 BF4, 2013 PY6, 2007 TG8, 2004 AC, 474179, 428086, 380359, 36284, 163364, 159402, 154330, 144411, 10115
`693`	Catalina Station in Arizona, 1 in MPEC 2020-X10 -- P/2005 CR16
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2020-X08 & 2020-X10 -- 2020 WT5, P/2020 W2
`970`	Chelmsford Obs. in England, 1 in MPEC 2020-X05 -- 2020 SO
`J043`	program code 3 via ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPEC 2020-X05 -- 2020 UD, 143404, 8014
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2020-X10 -- P/2020 W2
`F65.`	program code "." (23) via Faulkes Telescope North in Hawaii, 1 in MPEC 2020-X05 -- 2020 WM5
`W46`	Foxfire Village Obs., 2 in MPEC 2020-X05 -- 2017 SE19, 378160
`K88`	GINOP-KHK in Hungary, 1 in MPEC 2020-X07 -- 2020 XB
`U55`	Golden Ears Obs., 1 in MPEC 2020-X05 -- 2013 UX14
`N51`	GROWTH India Telescope, 1 in MPEC 2020-X10 -- P/2020 W2
`221`	IAS Obs. Hakos in Namibia, 1 in MPEC 2020-X05 -- 2014 LW21
`H06\|`	Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2020-X10 -- P/2020 W2
`Q621`	Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-X05 -- 69230
`2461`	program code 1 via KLENOT in the Czech Republic, 1 in MPEC 2020-X10 -- P/2020 W2
`809`	La Silla in Chile, 1 in MPEC 2020-X10 -- P/2005 CR16
`K93`	LCO Sutherland C in South Africa, 1 in MPEC 2020-X08 -- 2020 WT5
`704`	LINEAR in New Mexico, 1 in MPEC 2020-X10 -- P/2005 CR16
`699`	LONEOS in Arizona, 2 in MPEC 2020-X10 -- P/2005 CR16, P/2003 WR168
`568`	Mauna Kea in Hawaii, 1 in MPEC 2020-X10 -- P/2005 CR16
`711`	McDonald Obs. in Texas, 1 in MPEC 2020-X10 -- P/2020 W2
`V01`	Mountainville Obs. in Utah, 1 in MPEC 2020-X06 -- 2020 XA
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 22 in MPECs 2020-X05, 2020-X06 & 2020-X10 -- 2020 XA, 2020 WV, 2020 WM3, P/2020 W2, 2020 VN3, 2020 UJ6, 2020 OW3, 2017 WJ16, 2017 VT12, 2008 CZ118, P/2005 CR16, 2004 AC, 488693, 474179, 458062, 417949, 380359, 354663, 267494, 242216, 232382, 143678
`K74`	Muensterschwarzach Obs. in Germany, 3 in MPEC 2020-X05 -- 2020 OC8, 2017 WJ16, 2017 VT12
`644`	NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2020-X10 -- P/2003 WR168
`C51`	NEOWISE in Earth polar orbit, 2 in MPECs 2020-X05 & 2020-X08 -- 2020 WT5, 2005 QS10
`Z80`	Northolt Branch Obs. in England, 1 in MPEC 2020-X05 -- 2020 SO
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 30 in MPECs 2020-X05 & 2020-X09 -- 2020 WJ1, 2020 VQ3, 2020 UN2, 2020 QM4, 2016 YM, 2010 WF3, 2010 RN80, 2006 RJ1, 2004 AC, 2000 PQ27, 1998 WA2, 87311, 66251, 481542, 455193, 450259, 420262, 413260, 408752, 380929, 380359, 301011, 267494, 194126, 164207, 162980, 159402, 155140, 153249, 10115
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 13 in MPECs 2020-X05 & 2020-X10 -- P/2020 W2, 2020 UN2, 2016 NF, 2000 PQ27, 99935, 428086, 30825, 276274, 154330, 141052, 8014, 1981, 1865
`K63`	Pascoli Obs. in Italy, 1 in MPEC 2020-X10 -- P/2020 W2
`B49`	Paus Obs. in Spain, 3 in MPECs 2020-X05, 2020-X07 & 2020-X10 -- 2020 XB, P/2020 W2, 2018 VB1
`K61`	Rokycany Obs. in the Czech Republic, 1 in MPEC 2020-X10 -- P/2020 W2
`247`	roving observer, 1 in MPEC 2020-X05 -- 2020 SO
`L07`	Salvatore di Giacomo Obs., 1 in MPEC 2020-X10 -- P/2020 W2
`C95`	SATINO-1 in France, 1 in MPEC 2020-X05 -- 5645
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2020-X10 -- P/2020 W2
`L06`	Sormano2 Obs. in Italy, 1 in MPEC 2020-X10 -- P/2020 W2
`691`	Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2020-X05 & 2020-X10 -- P/2020 W2, 2020 VX1, 2020 UL1, P/2005 CR16
`291`	Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2020-X05 -- 2020 TB12, 2017 BK3
`W34`	Squirrel Valley Obs. in North Carolina, 4 in MPECs 2020-X05 & 2020-X06 -- 2020 XA, 2017 WJ16, 2013 UX14, 1998 WA2
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 23 in MPECs 2020-X05, 2020-X06 & 2020-X10 -- 2020 XA, 2020 WO3, 2020 WO, 2020 WM3, 2020 WL5, 2020 WJ4, 2020 WH2, 2020 WG, 2020 WF2, 2020 WE3, 2020 WE2, 2020 WC3, P/2020 W2, 2020 VZ5, 2020 VX5, 2020 VT, 2020 VQ3, 2020 VC5, 2020 UR6, 2020 TQ7, 2020 TH5, 2020 SO, 2020 OS7
`858`	Tebbutt Obs. in New Mexico, 1 in MPEC 2020-X10 -- P/2020 W2
`W33`	Transit Dreams Obs., 4 in MPEC 2020-X05 -- 2020 WB4, 2020 WA5, 2020 VZ6, 2020 OC8
`L01`	Visnjan Obs. in Croatia, 1 in MPEC 2020-X10 -- P/2020 W2
`I41`	Zwicky Transient Facility (ZTF) in southern California, 10 in MPECs 2020-X05 & 2020-X07 -- 2020 XB, 2020 VZ6, 2014 JH57, 382395, 31669, 24445, 152931, 137062, 7350, 2329

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

Impact Risk Monitoring on 3 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 WL5	JPL Sentry	1730	R E M O V E D						JPL: Risk listing removed at 1359 UTC today

2020 PU1	JPL Sentry	1730	2047-2070	3	1.4894e-06	-6.59	-6.94	0	JPL: Computed at 07:39 Oct. 27th Pacific time based on 30 observations spanning 5.6038 days (2020-Aug-12.505525 to 2020-Aug-18.10933). Diameter approximately 0.017 km. from weighted mean H=26.49.

2019 WU	JPL Sentry	1730	2058-2112	10	1.637287e-06	-7.04	-7.58	0	JPL: Computed at 05:29 Dec. 1st of 2019 Pacific time based on 29 observations spanning 9.2767 days (2019-Nov-19.34099 to 2019-Nov-28.617697). Diameter approximately 0.013 km. from weighted mean H=27.04.

2011 XC2	JPL Sentry	1730	2056-2056	1	6.683e-07	-4.81	-4.81	0	JPL: Computed at 12:24 April 13th of 2017 Pacific time based on 35 observations spanning 22.188 days (2011-Dec-08.19806 to 2011-Dec-30.386484). Diameter approximately 0.085 km. from weighted mean H=23.00.

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 3 December '20

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

2300	Grabbed MPEC 2020-X10 - Comet P/2005 CR16 = 2003 WR168 = 2020 W2 (NEAT-LINEAR) - see above
1900	Grabbed MPEC 2020-X09 - 2016 YM - see above
1730	Noted that JPL Sentry has updated its 2011 XC2 risk assessment - see above Noted that JPL Sentry has updated its 2019 WU risk assessment - see above Noted that JPL Sentry has updated its 2020 PU1 risk assessment - see above Noted that JPL Sentry has removed 2020 WL5 as an impact risk - see above Grabbed MPEC 2020-X05 - Daily Orbit Update - see above Grabbed MPEC 2020-X06 - 2020 XA - see above Grabbed MPEC 2020-X07 - 2020 XB - see above Grabbed MPEC 2020-X08 - 2020 WT5 - see above

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