2020-10-26 Tracking News

Contents on 26 October '20

Radar Astrometry -- one object
IAU Minor Planet Center
- NEOCP Activity -- 50 listings
- New MPECs -- nine MPECs
Observers -- 22 observers
Impact Risk Monitoring -- seven objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1205 risk-listed objects, 197 have had news in the last 31 days. Updated at 1704 UTC on 26 Oct.
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.

Radar Astrometry on 26 October '20

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 1700 UTC when the database was dated 26 Oct.

159402 1999 AP10 from Goldstone DSS-14 70m antenna (Oct. 24.22 range)

Photometry and some astrometry is needed for upcoming radar targets. See Arecibo and Goldstone schedules.

NEOCP Activity on 26 October '20

The MPC's NEO Confirmation Page has 50 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 50 objects listed. Of these, 31 were "one nighters." So far The Tracking News has counted a total of 63 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 26 October '20

Minor Planet Electronic Circulars

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

MPEC 2020-U232 time-stamped "00:56 UT" - 2020 UW5 - see below
MPEC 2020-U233 time-stamped "00:57 UT" - 2020 UX5 - see below
MPEC 2020-U234 time-stamped "00:58 UT" - 2020 UY5 - see below
MPEC 2020-U235 time-stamped "00:59 UT" - 2020 UZ5 - see below
MPEC 2020-U236 time-stamped "12:07 UT" - Daily Orbit Update - see below
MPEC 2020-U237 time-stamped "16:56 UT" - 2020 UC6 - see below
MPEC 2020-U238 time-stamped "16:58 UT" - 2020 UD6 - see below
MPEC 2020-U239 time-stamped "17:02 UT" - 2020 CM3 - see below
MPEC 2020-U240 time-stamped "18:52 UT" - 2020 UE6

MPEC 2020-U240 - "18:52 UT" - 2020 UE6

K20U06E 2020 UE6 (small asteroid, H=23.69 ~62m) was picked up at 1222 UT on 24 Oct. by Pan-STARRS 2 (PS2), observing it at Oct. 24.52-55p3. This detection was confirmed by Pan-STARRS 1 (PS1) (Oct. 25.51-52p2 & 26.54-58p4).

MPEC 2020-U239 - "17:02 UT" - 2020 CM3

K20C03M 2020 CM3 (q=34.560 AU, Q=111.244 AU, H=6.6 ~162 km) from program code 3 via Discovery Channel Telescope (DCT) (Oct. 17.45-48p2 & 20.47p1)

MPEC 2020-U238 - "16:58 UT" - 2020 UD6

K20U06D 2020 UD6 (small asteroid, H=24.45 ~44m) was picked up at 0625 UT on 23 Oct. by the Mt. Lemmon Survey (MLS), observing it at Oct. 23.27-28p3, 23.42p3, and 24.28p3. This detection was confirmed by PS2 (Oct. 22.47-51p3 at G=21.43-22.26).

MPEC 2020-U237 - "16:56 UT" - 2020 UC6

K20U06C 2020 UC6 (small asteroid, H=26.06 ~21m) was picked up at 0658 UT on 20 Oct. by PS1, observing it at Oct. 20.29-32p3 at w=22.14-59, 22.40-43p3 at G=22.70-23.07, and 23.43-47p3 at w=23.17-95.

<< DOU on 26 October '20 >> MPEC 2020-U236 - "12:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K20U04C 2020 UC4 (small asteroid, arc=4 days, H=26.2 ~19m, close passer, NHATS target) from Great Shefford Obs. (Oct. 26.06-08p4)
K20U03A 2020 UA3 (small asteroid, arc=10 days, H=26.7 ~15m, close passer, NHATS target) from PS1 (Oct. 25.51-53p2)
K20T08D 2020 TD8 (small asteroid, arc=10 days, H=27.0 ~13m, close passer, NHATS target) from Great Shefford Obs. (Oct. 25.79-80p4)
K18V06P 2018 VP6 (small asteroid, arc=9 days, H=27.1 ~13m, close passer) from the Spacewatch 1.8m telescope (2018 Nov. 12.14-15p2)
Observations of recently (no longer) risk-listed objects
K20T02R 2020 TR2 (small asteroid, Q=4.213 AU, arc=16 days, H=24.0 ~54m, close passer) from ATLAS Mauna Loa (Oct. 25.43-44p4)
Observations of close-passing objects
K20U04U 2020 UU4 (arc=3 days, H=26.8 ~15m) from Great Shefford Obs. (Oct. 25.78-79p4) and Clixby Obs. (Oct. 25.93p4)
K20U04J 2020 UJ4 (arc=3 days, H=26.9 ~14m) from Great Shefford Obs. (Oct. 25.85-86p3)
K20U03J 2020 UJ3 (arc=15 days, H=27.1 ~13m) from Great Shefford Obs. (Oct. 26.04-05p4)
K20U01N 2020 UN1 (arc=15 days, H=25.5 ~27m) from ATLAS Haleakala (Oct. 25.58-63p4)
K20T05R 2020 TR5 (arc=15 days, H=26.1 ~20m) from ATLAS Haleakala (Oct. 25.45-47p4)
K20R07A 2020 RA7 (arc=11 days, H=27.0 ~13m, NHATS target) from Steward Obs. Mt. Lemmon Station (Sept. 16.17p4)
K20O05K 2020 OK5 (arc=105 days, H=25.5 ~27m, NHATS target) from PS1 (Oct. 26.22-25p3)
K08U95U 2008 UU95 (Q=4.239 AU, arc=2 opp, H=23.7 ~62m) from ATLAS Haleakala (Oct. 25.43-46p4)
K01SS6G 2001 SG286 (arc=6 opp, H=21.0 ~214m) from ATLAS Haleakala (Oct. 25.38-40p4) and PS2 (Oct. 25.45-49p3)
Observation campaigns (NHATS targets, radar support)
K20U03N 2020 UN3 (arc=3 days, H=23.9 ~56m, NHATS) from the Zwicky Transient Facility (ZTF) (Oct. 23.34-41p4)
K20U01R 2020 UR1 (arc=10 days, H=25.6 ~26m, NHATS) from PS1 (Oct. 25.50-53p3 at w=21.8-22.1)
K20S06H 2020 SH6 (arc=29 days, H=24.7 ~39m, NHATS) from PS1 (Oct. 25.55-59p6)
K20R02R 2020 RR2 (arc=45 days, H=25.2 ~31m, NHATS) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Oct. 25.34-36p3)
K07U01Y 2007 UY1 (arc=3 opp, H=23.0 ~85m, NHATS) from ATLAS Haleakala (Oct. 25.49-51p4)
K06R01J 2006 RJ1 (arc=4 opp, H=22.2 ~123m, NHATS) from PS1 (Oct. 25.43-47p4)
E3404 143404 2003 BD44 (radar) from PS1 (Oct. 25.43-46p3)
11398 11398 1998 YP11 (radar) from ZTF (Oct. 23.40-41p2)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20U00Z 2020 UZ (i=44.1°, arc=9 days, H=22.2 ~123m) from PS1 (Oct. 25.55-59p4)
K20S07R 2020 SR7 (arc=29 days, H=22.1 ~129m) from PS2 (Oct. 25.29-30p3, 25.41-44p3 & 26.26-28p4) and ATLAS Haleakala (Oct. 25.37-40p4)
K20S06V 2020 SV6 (arc=31 days, H=23.9 ~56m) from PS1 (Oct. 25.50-54p4)
K20S03V 2020 SV3 (arc=35 days, H=22.4 ~112m) from PS1 (Oct. 25.32-36p4)
K20S03K 2020 SK3 (Q=4.134 AU, arc=10 days, H=25.1 ~32m) from Steward Mt. Lemmon Sta. (Sept. 23.28p4)
K20R06P 2020 RP6 (arc=12 days, H=24.8 ~37m) from Steward Mt. Lemmon Sta. (Sept. 16.28-29p4)
K20R06M 2020 RM6 (Q=4.246 AU, arc=43 days, H=24.9 ~35m) from Pleasant Groves Obs. (Oct. 23.32-34p3)
K20R05V 2020 RV5 (arc=74 days, H=23.9 ~56m) from ATLAS Haleakala (Oct. 25.45-48p4)
K20R04S 2020 RS4 (arc=45 days, H=23.7 ~62m) from Holmes/CTIO (Oct. 25.26-28p3)
K20R02M 2020 RM2 (arc=47 days, H=23.7 ~62m) from Holmes/CTIO (Oct. 25.32-33p3)
K20L01F 2020 LF1 (arc=164 days, H=23.3 ~74m) from PS1 (Oct. 25.55-59p3 at w=21.9-22.3)
K18P21J 2018 PJ21 (arc=62 days, H=24.8 ~37m) from UH/Tholen NEO Follow-Up 2.24m Telescope (2018 Oct. 12.43p1 at G=24.26)
K09WA5B 2009 WB105 (i=38.4°, arc=4 opp, H=23.5 ~68m) from Spacewatch 1.8m (2018 Nov. 9.39-40p2)
K20S01T 2020 ST1 (arc=60 days, H=21.9 ~141m) from ATLAS Haleakala (Oct. 25.36-38p4) and PS2 (Oct. 26.26-28p4)
K10R12C 2010 RC12 (arc=2 opp, H=21.9 ~141m) from PS1 (Oct. 25.36-39p3) and PS2 (Oct. 25.36-40p3)
Observations of other objects
K20U05K 2020 UK5 (arc=38 days, H=21.0 ~214m) from PS1 (Oct. 25.51-53p3)
K20U02G 2020 UG2 (arc=8 days, H=21.6 ~162m) from Holmes/CTIO (Oct. 25.20-22p3)
K20T06N 2020 TN6 (arc=11 days, H=19.2 ~490m) from PS1 (Oct. 25.50-53p3)
K20S02W 2020 SW2 (arc=37 days, H=20.6 ~257m) from PS1 (Oct. 25.32-36p3)
K20S01C 2020 SC1 (arc=41 days, H=21.1 ~204m) from PS2 (Oct. 25.36-40p4) and PS1 (Oct. 25.36-40p4)
K20R09Z 2020 RZ9 (Q=4.208 AU, arc=41 days, H=21.2 ~195m) from PS2 (Oct. 25.46-48p3)
K20Q07A 2020 QA7 (Q=4.149 AU, arc=56 days, H=20.4 ~282m) from ZTF (Oct. 23.34-37p2 & 23.41-43p2)
K20Q04M 2020 QM4 (arc=67 days, H=18.6 ~645m) from PS2 (Oct. 25.37-41p4), PS1 (Oct. 25.37-39p3), and ATLAS Haleakala (Oct. 25.45-48p4)
K20P05C 2020 PC5 (Q=4.177 AU, arc=71 days, H=18.6 ~645m) from MASTER-II Sutherland (Oct. 24.85p3)
K20P04X 2020 PX4 (arc=73 days, H=21.3 ~186m) from PS2 (Oct. 25.41-44p3)
K20P01D 2020 PD1 (Q=4.135 AU, arc=125 days, H=19.3 ~467m) from ATLAS Mauna Loa (Oct. 25.38-40p4)
K20O02A 2020 OA2 (arc=121 days, H=21.7 ~155m) from PS2 (Oct. 26.26-28p8) and PS1 (Oct. 26.31-33p4)
K19A03Q 2019 AQ3 (i=47.2°, Q=0.774 AU, arc=3 opp, H=17.5 ~1.07 km) from ZTF (Oct. 23.52-54p5)
K18T02K 2018 TK2 (Q=4.149 AU, arc=98 days, H=21.4 ~178m) from Spacewatch 1.8m (2018 Nov. 12.08-09p2)
K17G06O 2017 GO6 (Q=4.121 AU, arc=2 opp, H=19.3 ~467m) from ATLAS Haleakala (Oct. 25.46-48p4)
K16N38V 2016 NV38 (Q=4.019 AU, arc=2 opp, H=18.7 ~616m) from ATLAS Mauna Loa (Oct. 25.51-52p4)
K16C32B 2016 CB32 (Q=4.713 AU, arc=3 opp, H=18.7 ~616m) from ATLAS Haleakala (Oct. 25.57-61p4)
K15B04F 2015 BF4 (arc=6 opp, H=20.4 ~282m) from ATLAS Haleakala (Oct. 25.44-47p4)
K14UB6R 2014 UR116 (arc=6 opp, H=19.8 ~371m) from ATLAS Haleakala (Oct. 25.52-54p3)
K13U14X 2013 UX14 (arc=4 opp, H=18.3 ~741m) from ATLAS Haleakala (Oct. 25.58-63p7)
K13P06Y 2013 PY6 (arc=4 opp, H=19.3 ~467m) from ATLAS Haleakala (Oct. 25.45-48p4)
K12U68M 2012 UM68 from PS2 (Oct. 24.61-63p3)
K07X10B 2007 XB10 (i=41.3°, arc=5 opp, H=17.7 ~977m) from PS2 (Oct. 25.54-58p4)
K07VD7X 2007 VX137 (arc=5 opp, H=18.5 ~676m) from ATLAS Haleakala (Oct. 25.40-41p3)
K07S01R 2007 SR1 (arc=4 opp, H=20.2 ~309m) from SATINO-1 (Oct. 24.82-83p2)
K06S06A 2006 SA6 (Q=4.504 AU, arc=4 opp, H=19.2 ~490m) from PS1 (Oct. 25.50-54p4)
K05S26H 2005 SH26 (arc=5 opp, H=20.5 ~269m) from ZTF (Oct. 21.33-37p4)
K04U01S 2004 US1 (arc=2 opp, H=20.8 ~234m) from Oberfrauendorf Obs. (Oct. 25.90-93p5)
K04L03U 2004 LU3 (arc=5 opp, H=18.4 ~708m) from ATLAS Mauna Loa (Oct. 25.45-46p4)
K03U22G 2003 UG22 (arc=3 opp, H=21.1 ~204m) from ATLAS Haleakala (Oct. 25.49-51p7)
K02T67S 2002 TS67 (arc=6 opp, H=19.1 ~513m) from ZTF (Oct. 21.40-46p4 & 23.39-43p2)
K02G08Z 2002 GZ8 (Q=4.633 AU, arc=4 opp, H=18.4 ~708m) from ATLAS Haleakala (Oct. 25.50-52p4) and Zvjezdarnica Graberje (Oct. 25.95-97p3)
K00T28U 2000 TU28 (arc=3 opp, H=21.1 ~204m) from ATLAS Mauna Loa (Oct. 25.46-47p4)
K00P27Q 2000 PQ27 (arc=3 opp, H=20.0 ~339m) from ATLAS Haleakala (Oct. 25.41-43p4)
J98M24R 1998 MR24 (arc=5 opp, H=19.2 ~490m) from PS1 (Oct. 25.54-59p4)
p7103 517103 2013 EM20 from ATLAS Mauna Loa (Oct. 25.63-65p4)
o5019 505019 2011 QH21 from PS1 (Oct. 26.29-30p2)
m0824 480824 1999 JO6 from ZTF (Oct. 23.37-41p4) and ATLAS Mauna Loa (Oct. 25.46-47p3)
l4179 474179 1999 VS6 from ATLAS Haleakala (Oct. 25.50-53p4)
k5749 465749 2009 WO6 from ZTF (Oct. 21.42-44p2, 23.39p1 & 23.44-46p2)
i7903 447903 2007 XJ20 from PS1 (Oct. 25.55-60p4 at w=22.1-5)
h5404 435404 2008 AT28 from ZTF (Oct. 23.46-48p2)
g0302 420302 2011 XZ1 from ATLAS Haleakala (Oct. 25.36-38p4)
f5029 415029 2011 UL21 from ZTF (Oct. 21.41p1 & 23.49p1)
f4903 414903 2010 XT45 from ATLAS Haleakala (Oct. 25.52-54p4)
f4586 414586 2009 UV18 from ATLAS Haleakala (Oct. 25.52-54p4)
c0929 380929 2006 HU30 from ATLAS Mauna Loa (Oct. 25.42-44p4)
c0359 380359 2002 TN30 from ZTF (Oct. 23.45p1)
b6848 376848 2001 RY47 from ATLAS Haleakala (Oct. 25.42-44p3)
Z4663 354663 2005 LY19 from ZTF (Oct. 23.52-54p5)
U4293 304293 2006 SQ78 from ATLAS Mauna Loa (Oct. 25.44-45p4)
S3729 283729 2002 UX from ZTF (Oct. 21.44-45p2, 23.44p1 & 23.49p2) and PS2 (Oct. 25.60-63p3)
O1596 241596 1998 XM2 from ATLAS Haleakala (Oct. 25.56-57p7)
L9021 219021 1991 LH from ATLAS Haleakala (Oct. 25.23-26p4)
L6707 216707 2004 XP164 from ATLAS Mauna Loa (Oct. 25.58-60p4)
K9924 209924 2005 WS55 from ZTF (Oct. 23.53-54p5)
J4126 194126 2001 SG276 from ATLAS Haleakala (Oct. 25.48-50p4)
J0119 190119 2004 VA64 from PS1 (Oct. 25.55-59p4)
G3902 163902 2003 SW222 from ZTF (Oct. 23.37p1 & 23.42p1)
G2173 162173 Ryugu (1999 JU3) from ATLAS Haleakala (Oct. 25.36-38p4)
F9856 159856 2004 JW6 from ATLAS Mauna Loa (Oct. 25.47p3)
F4302 154302 2002 UQ3 from ATLAS Haleakala (Oct. 25.42-47p6)
F4007 154007 2002 BY from PS1 (Oct. 25.56-60p3)
F3953 153953 2002 AD9 from ZTF (Oct. 23.52-54p4)
F3249 153249 2001 BW15 from Squirrel Valley Obs. (Oct. 19.06-08p3)
F2978 152978 2000 GJ147 from ATLAS Mauna Loa (Oct. 25.51-52p4)
E4411 144411 2004 EW9 from PS2 (Oct. 25.50-53p4)
E0333 140333 2001 TD2 from ATLAS Haleakala (Oct. 25.40-42p4)
89355 89355 2001 VS78 from ATLAS Haleakala (Oct. 25.60-64p4)
89136 89136 2001 US16 from PS1 (Oct. 25.55-59p3)
88264 88264 2001 KN20 from ZTF (Oct. 23.37-41p4) and ATLAS Mauna Loa (Oct. 25.46-47p4)
87684 87684 2000 SY2 from ATLAS Mauna Loa (Oct. 25.39-40p4)
85867 85867 1999 BY9 from PS1 (Oct. 25.56-59p3)
85804 85804 1998 WQ5 from ZTF (Oct. 21.22-24p2 & 23.16-21p3), ATLAS Haleakala (Oct. 25.34-36p4), and PS1 (Oct. 26.28-30p3)
85182 85182 1991 AQ from ZTF (Oct. 23.52-54p5)
65717 65717 1993 BX3 from ATLAS Haleakala (Oct. 25.45-48p4)
53435 53435 1999 VM40 from ATLAS Haleakala (Oct. 25.56-57p4)
53430 53430 1999 TY16 from ZTF (Oct. 23.14-15p2 & 23.20p2) and PS1 (Oct. 26.22-25p4)
38091 38091 1999 JT3 from PS1 (Oct. 25.62-63p3)
36284 36284 2000 DM8 from PS1 (Oct. 26.23-25p3)
27031 27031 1998 RO4 from ATLAS Haleakala (Oct. 25.52-54p4)
26310 26310 1998 TX6 from PS1 (Oct. 25.43-46p3)
21374 21374 1997 WS22 from ATLAS Haleakala (Oct. 25.57-60p4)
21088 21088 Chelyabinsk (1992 BL2) from ATLAS Haleakala (Oct. 25.62-64p4)
16834 16834 1997 WU22 from ATLAS Haleakala (Oct. 25.50-52p4)
15817 15817 Lucianotesi (1994 QC) from ATLAS Mauna Loa (Oct. 25.37-38p4)
12711 12711 Tukmit (1991 BB) from ZTF (Oct. 23.53-54p5)
12538 12538 1998 OH from ZTF (Oct. 21.42-44p2, 23.39p1 & 23.44-46p2)
09058 9058 1992 JB from ATLAS Haleakala (Oct. 25.45-48p4)
08014 8014 1990 MF from PS1 (Oct. 25.43-47p4) and ATLAS Haleakala (Oct. 25.54-58p4)
07350 7350 1993 VA from ZTF (Oct. 23.52-54p4)
06239 6239 Minos (1989 QF) from ATLAS Haleakala (Oct. 25.41-43p4)
05879 5879 Almeria (1992 CH1) from ATLAS Mauna Loa (Oct. 25.57-58p4)
05836 5836 1993 MF from ATLAS Haleakala (Oct. 25.55-59p4)
05587 5587 1990 SB from ZTF (Oct. 23.40-41p2)
05131 5131 1990 BG from ZTF (Oct. 21.49-52p2 & 23.48-51p2)
04953 4953 1990 MU from ATLAS Mauna Loa (Oct. 25.41-42p4)
04503 4503 Cleobulus (1989 WM) from program code 3 via ESA Optical Ground Station (ESA OGS) (Oct. 15.01-05p4)
04450 4450 Pan (1987 SY) from ATLAS Haleakala (Oct. 25.40-42p4)
04055 4055 Magellan (1985 DO2) from ATLAS Mauna Loa (Oct. 25.44-45p4)
03199 3199 Nefertiti (1982 RA) from ZTF (Oct. 23.52-54p5)
02368 2368 Beltrovata (1977 RA) from ATLAS Haleakala (Oct. 25.55-56p4)
02212 2212 Hephaistos (1978 SB) from ATLAS Haleakala (Oct. 25.48-50p4)
01943 1943 Anteros (1973 EC) from ZTF (Oct. 23.48-51p3)
01580 1580 Betulia (1950 KA) from ZTF (Oct. 21.38p1, 21.45p1, 23.38p1 & 23.43p1) and ATLAS Haleakala (Oct. 25.59-63p4)
00887 887 Alinda (1918 DB) from ATLAS Mauna Loa (Oct. 25.30-31p4)
00433 433 Eros (1898 DQ) from MASTER Tavrida (Oct. 25.12-14p3)

MPEC 2020-U235 - "00:59 UT" - 2020 UZ5

K20U05Z 2020 UZ5 (small asteroid, H=22.5 ~107m) was picked up at 1151 UT on 23 Oct. by PS1, observing it at Oct. 23.49-53p4, 24.48-52p4, and 25.51-54p4. This detection was confirmed by Holmes/CTIO (Oct. 24.32-33p3 & 25.31p3).

MPEC 2020-U234 - "00:58 UT" - 2020 UY5

K20U05Y 2020 UY5 (small asteroid, H=25.5 ~27m) was picked up at 0553 UT on 23 Oct. by MLS, observing it at Oct. 23.25-26p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Oct. 23.40p4 & 24.22-23p3), Holmes/CTIO (Oct. 24.20-21p3 & 25.25-26p3), and Great Shefford Obs. (Oct. 25.93-95p2).

MPEC 2020-U233 - "00:57 UT" - 2020 UX5

K20U05X 2020 UX5 (H=25.9 ~22m, NHATS) was picked up at 0420 UT on 23 Oct. by MLS, observing it at Oct. 23.18-20p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Oct. 23.36p4 & 24.26-27p4), Holmes/CTIO (Oct. 24.12-13p3 & 25.17-18p3), and Great Shefford Obs. (Oct. 25.87-91p3).

MPEC 2020-U232 - "00:56 UT" - 2020 UW5

K20U05W 2020 UW5 (i=36.9°, H=21.4 ~178m) was picked up at 1309 UT on 23 Oct. by PS1, observing it at Oct. 16.48-49p2 at G=20.18-47, 23.37-40p3 at G=21.21-76, 23.55-59p3 at w=21.75-22.22, 24.39-43p6 at G=20.72-21.64, 25.36-40p4 at G=20.94-21.25, and 25.51-53p3 at w=21.32-70. This detection was confirmed by PS2 (Oct. 15.46-50p4, 17.51-54p3, 22.42-45p3, 23.36p2, 23.49p1 & 25.37-40p3) and MLS (Oct. 22.26p2).

Observers on 26 October '20

A total of 22 observers appear in today's MPECs.

Code	Observer / observatory
`T05`	ATLAS Haleakala in Hawaii, 46 in MPEC 2020-U236 -- 2020 UN1, 2020 TR5, 2020 ST1, 2020 SR7, 2020 RV5, 2020 QM4, 2017 GO6, 2016 CB32, 2015 BF4, 2014 UR116, 2013 UX14, 2013 PY6, 2008 UU95, 2007 VX137, 2007 UY1, 2003 UG22, 2002 GZ8, 2001 SG286, 2000 PQ27, 89355, 85804, 65717, 53435, 474179, 420302, 414903, 414586, 376848, 27031, 241596, 219021, 21374, 21088, 194126, 16834, 162173, 154302, 140333, 9058, 8014, 6239, 5836, 4450, 2368, 2212, 1580
`T08`	ATLAS Mauna Loa in Hawaii, 19 in MPEC 2020-U236 -- 2020 TR2, 2020 PD1, 2016 NV38, 2004 LU3, 2000 TU28, 88264, 87684, 517103, 480824, 380929, 304293, 216707, 159856, 15817, 152978, 5879, 4953, 4055, 887
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPECs 2020-U233, 2020-U234, 2020-U235 & 2020-U236 -- 2020 UZ5, 2020 UY5, 2020 UX5, 2020 UG2, 2020 RS4, 2020 RR2, 2020 RM2
`Z99`	Clixby Obs. in England, 1 in MPEC 2020-U236 -- 2020 UU4
`G373`	program code 3 via Discovery Channel Telescope in Arizona, 1 in MPEC 2020-U239 -- 2020 CM3
`J043`	program code 3 via ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2020-U236 -- 4503
`253`	Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 159402
`J95`	Great Shefford Obs. in England, 7 in MPECs 2020-U233, 2020-U234 & 2020-U236 -- 2020 UY5, 2020 UX5, 2020 UU4, 2020 UJ4, 2020 UJ3, 2020 UC4, 2020 TD8
`L52`	MASTER Tavrida, 1 in MPEC 2020-U236 -- 433
`K95`	MASTER-II Sutherland in South Africa, 1 in MPEC 2020-U236 -- 2020 PC5
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2020-U232, 2020-U233, 2020-U234 & 2020-U238 -- 2020 UY5, 2020 UX5, 2020 UW5, 2020 UD6
`G34`	Oberfrauendorf Obs. in Germany, 1 in MPEC 2020-U236 -- 2004 US1
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 35 in MPECs 2020-U232, 2020-U235, 2020-U236, 2020-U237 & 2020-U240 -- 2020 UZ5, 2020 UZ, 2020 UW5, 2020 UR1, 2020 UK5, 2020 UE6, 2020 UC6, 2020 UA3, 2020 TN6, 2020 SW2, 2020 SV6, 2020 SV3, 2020 SH6, 2020 SC1, 2020 QM4, 2020 OK5, 2020 OA2, 2020 LF1, 2010 RC12, 2006 SA6, 2006 RJ1, 1998 MR24, 89136, 85867, 85804, 53430, 505019, 447903, 38091, 36284, 26310, 190119, 154007, 143404, 8014
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 16 in MPECs 2020-U232, 2020-U236, 2020-U238 & 2020-U240 -- 2020 UW5, 2020 UE6, 2020 UD6, 2020 ST1, 2020 SR7, 2020 SC1, 2020 RZ9, 2020 QM4, 2020 PX4, 2020 OA2, 2012 UM68, 2010 RC12, 2007 XB10, 2001 SG286, 283729, 144411
`W16`	Pleasant Groves Obs., 1 in MPEC 2020-U236 -- 2020 RM6
`C95`	SATINO-1 in France, 1 in MPEC 2020-U236 -- 2007 SR1
`291`	Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2020-U236 -- 2018 VP6, 2018 TK2, 2009 WB105
`W34`	Squirrel Valley Obs. in North Carolina, 1 in MPEC 2020-U236 -- 153249
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 5 in MPECs 2020-U233, 2020-U234 & 2020-U236 -- 2020 UY5, 2020 UX5, 2020 SK3, 2020 RP6, 2020 RA7
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-U236 -- 2018 PJ21
`L70`	Zvjezdarnica Graberje, 1 in MPEC 2020-U236 -- 2002 GZ8
`I41`	Zwicky Transient Facility (ZTF) in southern California, 28 in MPEC 2020-U236 -- 2020 UN3, 2020 QA7, 2019 AQ3, 2005 SH26, 2002 TS67, 88264, 85804, 85182, 53430, 480824, 465749, 435404, 415029, 380359, 354663, 283729, 209924, 163902, 153953, 12711, 12538, 11398, 7350, 5587, 5131, 3199, 1943, 1580

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

Impact Risk Monitoring on 26 October '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 UC4	JPL Sentry	1700	2113-2118	4	1.16424e-07	-7.85	-7.99	0	JPL: Computed at 07:40 today Pacific time based on 24 observations spanning 3.7371 days (2020-Oct-22.341905 to 2020-Oct-26.078956). Diameter approximately 0.021 km. from weighted mean H=26.09.
2020 UC4	NEODyS	1700	2084-2120	9	9.94e-07	-6.92	-7.26	n/a	NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2020-10-22.343 to 2020-10-26.080."

2020 UA3	JPL Sentry	1700	R E M O V E D						JPL: Risk listing removed at 1457 UTC today
2020 UA3	NEODyS	1700	2114	1	5.74e-09	-9.55	-9.55	0	NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2020-10-15.583 to 2020-10-25.534."

2020 TD8	JPL Sentry	1700	2045-2107	21	1.194256e-05	-5.81	-5.99	0	JPL: Computed at 07:37 today Pacific time based on 53 observations spanning 10.478 days (2020-Oct-15.322434 to 2020-Oct-25.800839). Diameter approximately 0.014 km. from weighted mean H=26.96.
2020 TD8	NEODyS	1700	2045-2113	36	1.42e-05	-5.78	-6.04	0	NEODyS: "Based on 53 optical observations (of which 1 are rejected as outliers) from 2020-10-15.323 to 2020-10-25.802."

2018 VP6	JPL Sentry	1700	2088-2088	2	3.15e-06	-6.67	-6.90	0	JPL: Computed at 07:29 today Pacific time based on 34 observations spanning 9.1919 days (2018-Nov-10.2782 to 2018-Nov-19.47006). Diameter approximately 0.013 km. from weighted mean H=27.16.
2018 VP6	NEODyS	1700	2088-2118	6	3.49e-06	-6.65	-6.95	0	NEODyS: "Based on 34 optical observations (of which 1 are rejected as outliers) from 2018-11-10.279 to 2018-11-19.471."

2011 UL169	JPL Sentry	1700	2057-2066	5	1.2930323e-05	-6.41	-6.46	0	JPL: Computed at 16:00 April 9th of 2017 Pacific time based on 26 observations spanning 3.9809 days (2011-Oct-27.2919 to 2011-Oct-31.27277). Diameter approximately 0.007 km. from weighted mean H=28.28.

2005 GQ33	JPL Sentry	1700	2023-2110	24	2.7834e-08	-6.59	-7.36	0	JPL: Computed at 15:01 April 10th of 2017 Pacific time based on 16 observations spanning .71055 days (2005-Apr-06.32956 to 2005-Apr-07.04011). Diameter approximately 0.063 km. from weighted mean H=23.66.

2002 UV36	JPL Sentry	1700	2087-2087	1	6.979e-06	-6.20	-6.20	0	JPL: Computed at 16:02 April 8th of 2017 Pacific time based on 32 observations spanning 14.341 days (2002-Oct-31.18124 to 2002-Nov-14.52235). Diameter approximately 0.016 km. from weighted mean H=26.67.

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 26 October '20

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

2100	Grabbed MPEC 2020-U240 - 2020 UE6 - see above
1711	Grabbed MPEC 2020-U239 - 2020 CM3 - see above
1700	Noted that JPL Sentry has updated its 2002 UV36 risk assessment - see above Noted that JPL Sentry has updated its 2005 GQ33 risk assessment - see above Noted that JPL Sentry has updated its 2011 UL169 risk assessment - see above Noted that JPL Sentry has updated its 2018 VP6 risk assessment - see above Noted that NEODyS has updated its 2018 VP6 risk assessment - see above Noted that JPL Sentry has updated its 2020 TD8 risk assessment - see above Noted that NEODyS has updated its 2020 TD8 risk assessment - see above Noted that JPL Sentry has removed 2020 UA3 as an impact risk - see above Noted that NEODyS has posted 2020 UA3 as an impact risk - see above Noted that JPL Sentry has updated its 2020 UC4 risk assessment - see above Noted that NEODyS has updated its 2020 UC4 risk assessment - see above Grabbed MPEC 2020-U236 - Daily Orbit Update - see above Grabbed MPEC 2020-U237 - 2020 UC6 - see above Grabbed MPEC 2020-U238 - 2020 UD6 - see above Noted Radar Astrometry database update - see above
0500	Grabbed MPEC 2020-U232 - 2020 UW5 - see above Grabbed MPEC 2020-U233 - 2020 UX5 - see above Grabbed MPEC 2020-U234 - 2020 UY5 - see above Grabbed MPEC 2020-U235 - 2020 UZ5 - see above

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