2020-09-23 Tracking News

Contents on 23 September '20

IAU Minor Planet Center
- NEOCP Activity -- 67 listings
- New MPECs -- sixteen MPECs
Observers -- 38 observers
Impact Risk Monitoring -- ten objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
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 23 September '20

The MPC's NEO Confirmation Page has 67 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 67 objects listed. Of these, 47 were "one nighters." The Tracking News counted a total of 91 listings on the NEOCP on this day.

New MPECs on 23 September '20

Minor Planet Electronic Circulars

There were sixteen MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2020-S155 time-stamped "00:22 UT" - Comet P/2002 T5 = P/2020 Q3 (LINEAR) - see below
MPEC 2020-S156 time-stamped "03:13 UT" - 2020 SK3 - see below
MPEC 2020-S157 time-stamped "03:14 UT" - 2020 SL3 - see below
MPEC 2020-S158 time-stamped "03:15 UT" - 2020 SM3 - see below
MPEC 2020-S159 time-stamped "07:06 UT" - 2020 SN3 - see below
MPEC 2020-S160 time-stamped "07:06 UT" - 2020 SO3 - see below
MPEC 2020-S161 time-stamped "07:07 UT" - 2020 SP3 - see below
MPEC 2020-S162 time-stamped "07:09 UT" - 2020 SQ3 - see below
MPEC 2020-S163 time-stamped "12:01 UT" - Daily Orbit Update - see below
MPEC 2020-S164 time-stamped "14:11 UT" - 2020 SS3 - see below
MPEC 2020-S165 time-stamped "14:13 UT" - 2020 ST3 - see below
MPEC 2020-S166 time-stamped "18:30 UT" - 2005 WZ - see below
MPEC 2020-S167 time-stamped "19:12 UT" - 2020 SV3 - see below
MPEC 2020-S168 time-stamped "19:39 UT" - Comet C/2020 R7 (ATLAS) - see below
MPEC 2020-S169 time-stamped "20:44 UT" - 2020 SW3 - see below
MPEC 2020-S170 time-stamped "23:59 UT" - 2020 SX3

MPEC 2020-S170 - "23:59 UT" - 2020 SX3

K20S03X 2020 SX3 (small asteroid, Q=4.373 AU, Earth MOID=4.5 LD, H=24.2 ~49m) was picked up at 0459 UT on 22 Sept. by the Mt. Lemmon Survey (MLS), observing it at Sept. 22.21-22p4. This detection was confirmed by Pan-STARRS 1 (PS1) (Aug. 19.44-45p2 at G=22.87-23.17), Pan-STARRS 2 (PS2) (Sept. 10.36-39p2, 17.31-33p3 & 22.35-38p3), Steward Obs. Mt. Lemmon Station (Sept. 22.32-33p4 & 23.22p3), and Visnjan Obs. (Sept. 23.94-95p3).

MPEC 2020-S169 - "20:44 UT" - 2020 SW3

K20S03W 2020 SW3 (small asteroid, H=26.82 ~15m) was picked up at 0807 UT on 22 Sept. by MLS, observing it at Sept. 22.34-36p4 and 22.44p2. This detection was confirmed by Steward Mt. Lemmon Sta. (Sept. 23.25p3).

MPEC 2020-S168 - "19:39 UT" - Comet C/2020 R7 (ATLAS)

CK20R070 C/2020 R7 (ATLAS) (i=114.9°, q=2.939 AU, TP=2022 Sept. 14.95549 TT) was picked up at 1423 UT on 15 Sept. by ATLAS Mauna Loa, observing it at Sept. 15.60-63p4. This detection was confirmed by Hidetaka Sato via iTelescope Obs. Siding Spring (Sept. 16.66-67p3), Gisborne Obs. (Sept. 16.67-69p3, 18.65-68p4 & 21.64-70p5), Moquegua Obs. (Sept. 19.19-27p6 & 20.31-33p3), program code 2 via ESA Optical Ground Station (ESA OGS) (Sept. 19.24p3), AMACS1 (Sept. 19.27-28p3 & 21.24-32p3), Galilei Obs. (Sept. 21.19-20p2), program code "%" (14) via Slooh.com Chile Obs. (Sept. 21.30-31p4), B. Lutkenhoner via Slooh.com Chile Obs. (Sept. 21.35-36p2), Rolando Ligustri via iTelescope Obs. Siding Spring (Sept. 22.76-77p3), and Telescope Live (Sept. 23.27-29p3).

MPEC 2020-S167 - "19:12 UT" - 2020 SV3

K20S03V 2020 SV3 (small asteroid, H=22.3 ~117m) was picked up at 0930 UT on 20 Sept. by MLS, observing it at Sept. 20.40-41p4 at G=21.3-22.5 and 20.46p3 at G=21.3-4. This detection was confirmed by Astronomical Research Obs. Westfield (Sept. 21.32-33p2 & 22.34-35p3) and Steward Mt. Lemmon Sta. (Sept. 21.36-37p4 at G=19.9-21.0, 22.32p3 at G=20.48-21.58 & 23.31-32p3 at G=21.13-22.49).

MPEC 2020-S166 - "18:30 UT" - 2005 WZ

K05W00Z 2005 WZ (small asteroid, H=22.8 ~93m) from PS2 (Sept. 14.52-56p4), PS1 (Sept. 17.54-58p3 & 18.53-59p4), and MLS (Sept. 23.49-51p4)

MPEC 2020-S165 - "14:13 UT" - 2020 ST3

K20S03T 2020 ST3 (small asteroid, Earth MOID=1.6 LD, H=29.69 ~4m) was picked up at 0841 UT on 22 Sept. by MLS, observing it at Sept. 22.36-38p4 and 23.38-40p3. This detection was confirmed by Magdalena Ridge Obs. (MRO) (Sept. 22.42-44p4) and Steward Mt. Lemmon Sta. (Sept. 23.29p4).

MPEC 2020-S164 - "14:11 UT" - 2020 SS3

K20S03S 2020 SS3 (small asteroid, Earth MOID=0.3 LD, H=28.47 ~7m) was picked up at 0958 UT on 17 Sept. by MLS, observing it at Sept. 17.42-43p3. This detection was confirmed by Steward Mt. Lemmon Sta. (Sept. 17.46-47p4), Visnjan Obs. (Sept. 18.09-10p6), and Great Shefford Obs. (Sept. 18.13p3).

<< DOU on 23 September '20 >> MPEC 2020-S163 - "12:01 UT" - Daily Orbit Update

Observations of risk-listed objects
K20S01O 2020 SO1 (small asteroid, arc=6 days, H=27.1 ~13m, close passer, NHATS target) from PS2 (Sept. 22.60-62p4) and Steward Mt. Lemmon Sta. (Sept. 23.37-38p4)
K20S00W 2020 SW (close passer, NHATS target) from GINOP-KHK (Sept. 22.82p3), Montcabre Obs. (Sept. 22.90p1, 22.97p1 & 23.05p1), Northolt Branch Obs. (Sept. 22.92-94p3), Chelmsford Obs. (Sept. 22.98-99p2), the Catalina Sky Survey (CSS) (Sept. 23.32-34p4), and Steward Mt. Lemmon Sta. (Sept. 23.36-37p4)
K20S00Q 2020 SQ (small asteroid, arc=11 days, H=27.4 ~11m, close passer, NHATS target) from Steward Mt. Lemmon Sta. (Sept. 23.29-30p3)
K20Q02B 2020 QB2 (small asteroid, arc=35 days, H=25.2 ~31m, close passer) from UH/Tholen NEO Follow-Up 2.24m Telescope (Sept. 18.41p1 at G=24.62)
K20F01A 2020 FA1 (small asteroid, arc=186 days, H=26.4 ~18m, NHATS target) from Tholen 2.24m (Sept. 18.63p1 at G=22.75)
Observations of recently (no longer) risk-listed objects
K20R07H 2020 RH7 (i=44.2°, arc=9 days, H=20.2 ~309m) from Steward Mt. Lemmon Sta. (Sept. 23.30-31p3)
Observations of close-passing objects
K20S03A 2020 SA3 (arc=3 days, H=25.4 ~28m, NHATS target) from Steward Mt. Lemmon Sta. (Sept. 23.36p4)
K20S02J 2020 SJ2 (arc=2 days, H=26.7 ~15m) from Clixby Obs. (Sept. 21.91p3)
K20S01M 2020 SM1 (arc=3 days, H=26.2 ~19m, NHATS target) from PS1 (Sept. 22.42-46p3)
K20S00N 2020 SN (arc=6 days, H=24.8 ~37m) from ATLAS Haleakala (Sept. 22.46-51p4), QOS Obs. (Sept. 22.81p3), and Steward Mt. Lemmon Sta. (Sept. 23.46p4)
K20R07A 2020 RA7 (arc=8 days, H=27.0 ~13m, NHATS target) from MLS (Sept. 22.34-36p4 & 23.31-32p4)
K20R06Q 2020 RQ6 (arc=8 days, H=27.5 ~11m, NHATS target) from Clixby Obs. (Sept. 21.92p3)
K20R02K 2020 RK2 (arc=12 days, H=24.2 ~49m) from MLS (Sept. 22.25-27p3)
K20R01Y 2020 RY1 (Q=4.009 AU, arc=12 days, H=26.4 ~18m) from ARO Westfield (Sept. 22.28-29p3 at V=22.2-3)
K20P07M 2020 PM7 (Q=4.014 AU, arc=2 opp, H=22.3 ~117m) from QOS Obs. (Sept. 22.79-80p5)
K17S16L 2017 SL16 (arc=2 opp, H=25.9 ~22m, NHATS target) from Steward Mt. Lemmon Sta. (Sept. 23.31p4)
Observation campaigns (NHATS targets, radar support)
K20S01B 2020 SB1 (arc=5 days, H=28.2 ~8m, NHATS) from ARO Westfield (Sept. 22.26-27p3 at V=22.0-22.1)
K20R02W 2020 RW2 (arc=25 days, H=22.8 ~93m, NHATS) from PS1 (Sept. 22.58-62p3)
K20R02R 2020 RR2 (arc=12 days, H=25.4 ~28m, NHATS) from MLS (Sept. 22.31-33p4)
K20R02P 2020 RP2 (arc=15 days, H=26.0 ~21m, NHATS) from ARO Westfield (Sept. 22.06-08p3 at V=22.2-5)
K20R01G 2020 RG1 (arc=16 days, H=25.6 ~26m, NHATS) from Steward Mt. Lemmon Sta. (Sept. 23.40-42p3)
K20P01X 2020 PX1 (arc=42 days, H=23.7 ~62m, NHATS) from the Zwicky Transient Facility (ZTF) (Sept. 20.21p2 & 20.29p2)
K20L00R 2020 LR (arc=103 days, H=24.1 ~51m, NHATS) from PS1 (Sept. 22.43-45p3)
K11C02G 2011 CG2 (arc=3 opp, H=21.4 ~178m, NHATS) from MLS (Sept. 22.34-35p4)
-- NHATS target table
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20S03K 2020 SK3 (Q=4.079 AU, arc=6 days, H=25.1 ~32m) from ROASTERR-1 (Sept. 22.82-83p2)
K20S02X 2020 SX2 (arc=6 days, H=23.0 ~85m) from ARO Westfield (Sept. 22.33-36p4 at V=23.1-3)
K20S02S 2020 SS2 (arc=4 days, H=22.6 ~102m) from PS2 (Sept. 22.40-44p3)
K20S02K 2020 SK2 (arc=7 days, H=24.7 ~39m) from Steward Mt. Lemmon Sta. (Sept. 23.30p4)
K20S02B 2020 SB2 (arc=4 days, H=23.6 ~65m) from MLS (Sept. 22.17-18p4) and PS2 (Sept. 22.37-39p3)
K20S01W 2020 SW1 (arc=10 days, H=23.1 ~81m) from ARO Westfield (Sept. 22.18-20p2 at V=22.0-22.1)
K20S01A 2020 SA1 (arc=5 days, H=25.9 ~22m) from MLS (Sept. 22.38-39p3)
K20S00M 2020 SM (arc=6 days, H=23.9 ~56m) from Steward Mt. Lemmon Sta. (Sept. 23.37p2)
K20S00F 2020 SF (arc=7 days, H=24.5 ~43m) from Steward Mt. Lemmon Sta. (Sept. 23.28p4)
K20R09J 2020 RJ9 (arc=9 days, H=23.1 ~81m) from PS1 (Sept. 22.49-52p4 at w=22.3-7)
K20R08S 2020 RS8 (arc=7 days, H=24.7 ~39m) from ARO Westfield (Sept. 22.16-17p3 at V=21.8-22.2)
K20R08E 2020 RE8 (arc=9 days, H=25.2 ~31m) from Steward Mt. Lemmon Sta. (Sept. 23.44-45p2)
K20R08A 2020 RA8 (Q=4.028 AU, arc=9 days, H=24.1 ~51m) from Steward Mt. Lemmon Sta. (Sept. 23.34-35p4)
K20R07S 2020 RS7 (arc=8 days, H=25.4 ~28m) from Steward Mt. Lemmon Sta. (Sept. 23.33p4)
K20R06P 2020 RP6 (arc=9 days, H=24.9 ~35m) from Steward Mt. Lemmon Sta. (Sept. 23.47-48p3)
K20R06H 2020 RH6 (arc=9 days, H=24.9 ~35m) from Steward Mt. Lemmon Sta. (Sept. 23.46-47p4)
K20R03S 2020 RS3 (q=0.343 AU, arc=12 days, H=22.7 ~98m) from MLS (Sept. 22.34-36p4)
K20R03P 2020 RP3 (arc=12 days, H=25.5 ~27m) from MLS (Sept. 22.32-33p3)
K20R03J 2020 RJ3 (arc=11 days, H=23.4 ~71m) from ATLAS Haleakala (Sept. 22.42-46p4)
K20R02L 2020 RL2 (Q=4.137 AU, arc=12 days, H=24.8 ~37m) from PS1 (Sept. 22.43-47p4)
K20R00F 2020 RF (Q=4.183 AU, arc=25 days, H=22.2 ~123m) from Castelmartini Obs. (Sept. 18.09p3)
K20Q06R 2020 QR6 (arc=26 days, H=22.5 ~107m) from PS2 (Sept. 22.45-49p4)
K20Q06G 2020 QG6 (arc=37 days, H=22.5 ~107m) from MLS (Sept. 22.38-40p4)
K20Q05H 2020 QH5 (arc=42 days, H=23.4 ~71m) from ARO Westfield (Sept. 22.23-24p3 at V=22.0-22.2)
K20P06O 2020 PO6 (arc=40 days, H=22.9 ~89m) from PS1 (Sept. 22.38-41p3)
K20P03R 2020 PR3 (arc=39 days, H=23.0 ~85m) from MLS (Sept. 22.32-33p4)
K20O00H 2020 OH (arc=74 days, H=23.6 ~65m) from ARO Westfield (Sept. 22.21-22p3 at V=22.4-5)
K20L02E 2020 LE2 (arc=100 days, H=22.2 ~123m) from MLS (Sept. 23.33-35p4)
K20J03Q 2020 JQ3 (arc=154 days, H=22.8 ~93m) from ARO Westfield (Sept. 22.31-32p3 at V=22.0-22.4)
K18R03V 2018 RV3 (arc=4 opp, H=23.0 ~85m) from Castelmartini Obs. (Sept. 17.94p3)
K12S49W 2012 SW49 (arc=3 opp, H=22.1 ~129m) from MLS (Sept. 22.23-25p4)
K12S32H 2012 SH32 (arc=2 opp, H=22.2 ~123m) from MLS (Sept. 22.33-35p4)
K20S02H 2020 SH2 (i=44.2°, arc=11 days, H=22.0 ~135m) from ATLAS Haleakala (Sept. 22.42-46p4)
K20P04M 2020 PM4 (arc=38 days, H=21.9 ~141m) from PS2 (Sept. 22.45-49p4)
K20P02P 2020 PP2 (arc=59 days, H=22.0 ~135m) from PS1 (Sept. 22.37-41p4)
K15W01A 2015 WA1 (arc=3 opp, H=21.8 ~148m) from MLS (Sept. 22.34-35p4 at G=21.4-22.3) and PS1 (Sept. 22.49-52p3 at w=21.9-22.3)
Observations of other objects
K20S01G 2020 SG1 (arc=6 days, H=19.8 ~371m) from Steward Mt. Lemmon Sta. (Sept. 23.13-14p3)
K20S00B 2020 SB (Q=0.988 AU, arc=6 days, H=20.3 ~295m) from CSS (Sept. 22.14-16p4)
K20R03U 2020 RU3 (arc=12 days, H=21.4 ~178m) from ARO Westfield (Sept. 22.09-10p3 at V=22.0-22.2)
K20R01E 2020 RE1 (i=56.3°, arc=18 days, H=20.6 ~257m) from Castelmartini Obs. (Sept. 17.97p3), GINOP-KHK (Sept. 21.87-89p6), and Northolt Branch Obs. (Sept. 21.91-92p3)
K20Q06L 2020 QL6 (arc=28 days, H=19.0 ~537m) from PS1 (Sept. 22.58-61p4)
K20Q05Q 2020 QQ5 (arc=31 days, H=21.3 ~186m) from Steward Mt. Lemmon Sta. (Sept. 23.33p4)
K20Q04M 2020 QM4 (arc=35 days, H=18.6 ~645m) from GINOP-KHK (Sept. 23.06-07p3)
K20P05C 2020 PC5 (Q=4.177 AU, arc=39 days, H=18.5 ~676m) from PS2 (Sept. 22.45-49p4)
K20P04X 2020 PX4 (arc=40 days, H=21.3 ~186m) from ZTF (Sept. 22.24-25p2, 22.36p1 & 22.41p1) and PS1 (Sept. 22.42-46p3)
K20P01D 2020 PD1 (Q=4.135 AU, arc=92 days, H=19.3 ~467m) from GINOP-KHK (Sept. 22.93p3)
K20O08C 2020 OC8 (arc=99 days, H=20.7 ~245m) from ATLAS Haleakala (Sept. 22.34-37p6)
K20O03W 2020 OW3 (Q=4.802 AU, arc=65 days, H=19.6 ~407m) from ATLAS Mauna Loa (Sept. 22.45-49p4)
K20O02A 2020 OA2 (arc=87 days, H=21.7 ~155m) from PS1 (Sept. 22.42-46p3)
K20N01M 2020 NM1 (arc=74 days, H=20.1 ~323m) from Steward Mt. Lemmon Sta. (Sept. 23.14p2)
K20M02F 2020 MF2 (Q=4.267 AU, arc=119 days, H=19.7 ~389m) from PS1 (Sept. 22.42-45p3)
K20M00P 2020 MP (arc=99 days, H=20.6 ~257m) from MLS (Sept. 22.19-20p4), ZTF (Sept. 22.23p2 & 22.28-29p4), and PS2 (Sept. 22.35-39p3)
K20L03B 2020 LB3 (arc=99 days, H=19.6 ~407m) from Castelmartini Obs. (Sept. 17.92-93p3), ZTF (Sept. 22.25p1 & 22.31p1), and ATLAS Haleakala (Sept. 22.39-41p4)
K20K05Z 2020 KZ5 (arc=118 days, H=20.0 ~339m) from ZTF (Sept. 21.28-32p2 & 21.38-39p2)
K20B13H 2020 BH13 (Q=4.129 AU, arc=2 opp, H=19.9 ~355m) from iTelescope Obs. Siding Spring (Sept. 18.74-77p3)
K19S04V 2019 SV4 (q=0.336 AU, arc=3 opp, H=21.2 ~195m) from PS2 (Sept. 22.60-62p3)
K19G03Q 2019 GQ3 (arc=2 opp, H=20.7 ~245m) from ATLAS Haleakala (Sept. 22.47-54p4)
K17X62L 2017 XL62 (arc=2 opp, H=18.7 ~616m) from ZTF (Sept. 21.20-22p2, 22.17p1, 22.23p1 & 22.30p1)
K16T56Z 2016 TZ56 (i=60.6°, arc=4 opp, H=19.3 ~467m) from SATINO-1 (Sept. 18.13-14p2)
K16N38V 2016 NV38 (Q=4.019 AU, arc=2 opp, H=18.6 ~645m) from Castelmartini Obs. (Sept. 18.08p3) and ATLAS Haleakala (Sept. 22.53-55p4)
K16F14Y 2016 FY14 (arc=2 opp, H=19.1 ~513m) from ATLAS Mauna Loa (Sept. 22.48-51p4)
K16E85D 2016 ED85 (Q=5.062 AU, arc=3 opp, H=17.7 ~977m) from Castelmartini Obs. (Sept. 18.06p3), Ondrejov Obs. (Sept. 18.89-93p2, 18.97p1, 19.01p1, 19.05-09p2, 19.14p1, 19.89-93p2, 19.97p1, 20.05-13p3, 20.88-93p3, 20.98p1, 21.02p1 & 21.07-14p4), and GINOP-KHK (Sept. 23.04p3)
K13U14X 2013 UX14 (arc=4 opp, H=18.2 ~776m) from ATLAS Haleakala (Sept. 22.53-54p4)
K13TE4V 2013 TV144 (arc=3 opp, H=20.7 ~245m) from ATLAS Haleakala (Sept. 22.40-42p4)
K13P06Y 2013 PY6 (arc=4 opp, H=19.3 ~467m) from Castelmartini Obs. (Sept. 18.02p3) and ATLAS Haleakala (Sept. 22.43-45p4)
K11S32O 2011 SO32 (arc=3 opp, H=21.1 ~204m) from MLS (Sept. 22.19-20p4) and PS2 (Sept. 22.35-39p4)
K11B59F 2011 BF59 (arc=3 opp, H=19.1 ~513m) from PS1 (Sept. 22.53-56p4)
K10S15F 2010 SF15 (arc=2 opp, H=21.2 ~195m) from PS2 (Sept. 22.49-51p3)
K08W94Z 2008 WZ94 (q=0.345 AU, arc=3 opp, H=20.1 ~323m) from PS2 (Sept. 22.44-47p3)
K07VD7X 2007 VX137 (arc=5 opp, H=18.5 ~676m) from Castelmartini Obs. (Sept. 18.04p3), ZTF (Sept. 20.40p1), Northolt Branch Obs. (Sept. 21.93p3), and ATLAS Haleakala (Sept. 22.43-45p4)
K07T08G 2007 TG8 (Q=4.305 AU, arc=3 opp, H=18.6 ~645m) from ATLAS Mauna Loa (Sept. 22.54-55p4)
K06S19S 2006 SS19 (Q=4.404 AU, arc=3 opp, H=18.9 ~562m) from ATLAS Haleakala (Sept. 22.45-48p4) and PS1 (Sept. 22.53-56p4)
K06H00B 2006 HB (arc=4 opp, H=18.9 ~562m) from ATLAS Haleakala (Sept. 22.37-39p4)
K04R84F 2004 RF84 (arc=4 opp, H=18.3 ~741m) from CSS (Sept. 22.30-31p8) and ATLAS Mauna Loa (Sept. 22.41-43p4)
K04Q03D 2004 QD3 (arc=4 opp, H=19.4 ~446m) from MLS (Sept. 22.16-18p4) and PS2 (Sept. 22.35-37p3)
K02G08Z 2002 GZ8 (Q=4.633 AU, arc=4 opp, H=18.2 ~776m) from PS2 (Sept. 22.59-61p3)
K01Q34E 2001 QE34 (arc=5 opp, H=19.1 ~513m) from PS2 (Sept. 22.44-48p4)
K00P27Q 2000 PQ27 (arc=3 opp, H=19.9 ~355m) from CSS (Sept. 22.30-32p4)
J99S10K 1999 SK10 (arc=4 opp, H=19.7 ~389m) from MLS (Sept. 22.38-40p4)

MPEC 2020-S162 - "07:09 UT" - 2020 SQ3

K20S03Q 2020 SQ3 (small asteroid, H=26.58 ~16m) was picked up at 0840 UT on 22 Sept. by MLS, observing it at Sept. 22.36-38p4. This detection was confirmed by MRO (Sept. 22.43-45p4) and Steward Mt. Lemmon Sta. (Sept. 23.25-26p4).

MPEC 2020-S161 - "07:07 UT" - 2020 SP3

K20S03P 2020 SP3 (small asteroid, H=26.82 ~15m) was picked up at 0910 UT on 22 Sept. by MLS, observing it at Sept. 22.38-40p4 and 22.45p3. This detection was confirmed by MRO (Sept. 22.44-47p4) and Steward Mt. Lemmon Sta. (Sept. 23.24-25p3).

MPEC 2020-S160 - "07:06 UT" - 2020 SO3

K20S03O 2020 SO3 (small asteroid, Earth MOID=1.1 LD, H=27.14 ~13m) was picked up at 0711 UT on 22 Sept. by CSS, observing it at Sept. 22.30-32p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Sept. 22.38p4 & 23.22-23p4), MRO (Sept. 22.39-41p4), PS1 (Sept. 22.64p1), and Paus Obs. (Sept. 22.97-99p4).

MPEC 2020-S159 - "07:06 UT" - 2020 SN3

K20S03N 2020 SN3 (small asteroid, Earth MOID=1.4 LD, H=29.95 ~3m) was picked up at 0838 UT on 22 Sept. by MLS, observing it at Sept. 22.36-38p4 and 22.44p4. This detection was confirmed by MRO (Sept. 22.40-42p4) and Steward Mt. Lemmon Sta. (Sept. 23.24p4).

MPEC 2020-S158 - "03:15 UT" - 2020 SM3

K20S03M 2020 SM3 (small asteroid, H=23.16 ~79m) was picked up at 1447 UT on 16 Sept. by PS1, observing it at Sept. 16.62-63p4 and 17.47p1. This detection was confirmed by R. Wainscoat on Mauna Kea (Sept. 17.39p3) and Steward Mt. Lemmon Sta. (Sept. 22.36-37p3).

MPEC 2020-S157 - "03:14 UT" - 2020 SL3

K20S03L 2020 SL3 (small asteroid, H=25.64 ~25m) was picked up at 0914 UT on 22 Sept. by MLS, observing it at Sept. 22.38-40p3 and 22.45p3. This detection was confirmed by PS2 (Sept. 15.42-45p3 & 21.39-42p2), MRO (Sept. 22.43-45p4), and St. Pardon de Conques Obs. (Sept. 22.88-89p2).

MPEC 2020-S156 - "03:13 UT" - 2020 SK3

K20S03K 2020 SK3 (small asteroid, Q=4.077 AU, H=25.16 ~31m) was picked up at 0929 UT on 22 Sept. by PS2, observing it at Sept. 22.40-43p3. This detection was confirmed by PS1 (Sept. 17.30-31p2), St. Pardon de Conques Obs. (Sept. 22.83-84p3), and Dax Obs. (Sept. 22.99p3).

MPEC 2020-S155 - "00:22 UT" - Comet P/2002 T5 = P/2020 Q3 (LINEAR)

PK20Q030 P/2020 Q3 (Centaur, q=3.938 AU, Q=10.074 AU, TP=2021 Dec. 14.78301 TT) was picked up at 0236 UT on 18 Aug. by Calar Alto Schmidt, observing it at Aug. 18.11-14p3 and 19.11-14p4. This detection was confirmed by Shinshiro Obs. (Aug. 17.71p2 & 24.71p2), ESA Optical Ground Station (ESA OGS) (Aug. 19.21-22p2), Buchloe Obs. (Aug. 27.10-11p3), and ATLAS Mauna Loa (Sept. 11.55-56p4 & 15.47-51p4).
PK02T050 P/2002 T5 (LINEAR) (q=3.934 AU, Q=10.034 AU, TP=2003 June 27.85330 TT)

Observers on 23 September '20

A total of 38 observers appeared in this day's MPECs.

Code	Observer / observatory
`W94`	AMACS1 in Chile, 1 in MPEC 2020-S168 -- C/2020 R7
`H21`	Astronomical Research Obs. Westfield in Illinois, 11 in MPECs 2020-S163 & 2020-S167 -- 2020 SX2, 2020 SW1, 2020 SV3, 2020 SB1, 2020 RY1, 2020 RU3, 2020 RS8, 2020 RP2, 2020 QH5, 2020 OH, 2020 JQ3
`T05`	ATLAS Haleakala in Hawaii, 13 in MPEC 2020-S163 -- 2020 SN, 2020 SH2, 2020 RJ3, 2020 OC8, 2020 LB3, 2019 GQ3, 2016 NV38, 2013 UX14, 2013 TV144, 2013 PY6, 2007 VX137, 2006 SS19, 2006 HB
`T08`	ATLAS Mauna Loa in Hawaii, 6 in MPECs 2020-S155, 2020-S163 & 2020-S168 -- C/2020 R7, P/2020 Q3, 2020 OW3, 2016 FY14, 2007 TG8, 2004 RF84
`215`	Buchloe Obs. in Germany, 1 in MPEC 2020-S155 -- P/2020 Q3
`Z84`	Calar Alto Schmidt in Spain, 1 in MPEC 2020-S155 -- P/2020 Q3
`160`	Castelmartini Obs. in Italy, 8 in MPEC 2020-S163 -- 2020 RF, 2020 RE1, 2020 LB3, 2018 RV3, 2016 NV38, 2016 ED85, 2013 PY6, 2007 VX137
`703`	Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2020-S160 & 2020-S163 -- 2020 SW, 2020 SO3, 2020 SB, 2004 RF84, 2000 PQ27
`970`	Chelmsford Obs. in England, 1 in MPEC 2020-S163 -- 2020 SW
`Z99`	Clixby Obs. in England, 2 in MPEC 2020-S163 -- 2020 SJ2, 2020 RQ6
`958`	Dax Obs. in France, 1 in MPEC 2020-S156 -- 2020 SK3
`J04`	ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2020-S155 -- P/2020 Q3
`J042`	program code 2 via ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2020-S168 -- C/2020 R7
`X31`	Galilei Obs., 1 in MPEC 2020-S168 -- C/2020 R7
`K88`	GINOP-KHK in Hungary, 5 in MPEC 2020-S163 -- 2020 SW, 2020 RE1, 2020 QM4, 2020 PD1, 2016 ED85
`E94`	Gisborne Obs. in New Zealand, 1 in MPEC 2020-S168 -- C/2020 R7
`J95`	Great Shefford Obs. in England, 1 in MPEC 2020-S164 -- 2020 SS3
`Q62`	iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-S163 -- 2020 BH13
`Q621`	Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-S168 -- C/2020 R7
`Q623`	Rolando Ligustri in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-S168 -- C/2020 R7
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2020-S157, 2020-S159, 2020-S160, 2020-S161, 2020-S162 & 2020-S165 -- 2020 ST3, 2020 SQ3, 2020 SP3, 2020 SO3, 2020 SN3, 2020 SL3
`568^`	R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2020-S158 -- 2020 SM3
`213`	Montcabre Obs. in Spain, 1 in MPEC 2020-S163 -- 2020 SW
`W73`	Moquegua Obs., 1 in MPEC 2020-S168 -- C/2020 R7
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 28 in MPECs 2020-S157, 2020-S159, 2020-S161, 2020-S162, 2020-S163, 2020-S164, 2020-S165, 2020-S166, 2020-S167, 2020-S169 & 2020-S170 -- 2020 SX3, 2020 SW3, 2020 SV3, 2020 ST3, 2020 SS3, 2020 SQ3, 2020 SP3, 2020 SN3, 2020 SL3, 2020 SB2, 2020 SA1, 2020 RS3, 2020 RR2, 2020 RP3, 2020 RK2, 2020 RA7, 2020 QG6, 2020 PR3, 2020 MP, 2020 LE2, 2015 WA1, 2012 SW49, 2012 SH32, 2011 SO32, 2011 CG2, 2005 WZ, 2004 QD3, 1999 SK10
`Z80`	Northolt Branch Obs. in England, 3 in MPEC 2020-S163 -- 2020 SW, 2020 RE1, 2007 VX137
`557`	Ondrejov Obs. in the Czech Republic, 1 in MPEC 2020-S163 -- 2016 ED85
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 19 in MPECs 2020-S156, 2020-S158, 2020-S160, 2020-S163, 2020-S166 & 2020-S170 -- 2020 SX3, 2020 SO3, 2020 SM3, 2020 SM1, 2020 SK3, 2020 RW2, 2020 RL2, 2020 RJ9, 2020 QL6, 2020 PX4, 2020 PP2, 2020 PO6, 2020 OA2, 2020 MF2, 2020 LR, 2015 WA1, 2011 BF59, 2006 SS19, 2005 WZ
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 18 in MPECs 2020-S156, 2020-S157, 2020-S163, 2020-S166 & 2020-S170 -- 2020 SX3, 2020 SS2, 2020 SO1, 2020 SL3, 2020 SK3, 2020 SB2, 2020 QR6, 2020 PM4, 2020 PC5, 2020 MP, 2019 SV4, 2011 SO32, 2010 SF15, 2008 WZ94, 2005 WZ, 2004 QD3, 2002 GZ8, 2001 QE34
`B49`	Paus Obs. in Spain, 1 in MPEC 2020-S160 -- 2020 SO3
`L18`	QOS Obs., 2 in MPEC 2020-S163 -- 2020 SN, 2020 PM7
`L04`	ROASTERR-1 in Romania, 1 in MPEC 2020-S163 -- 2020 SK3
`C95`	SATINO-1 in France, 1 in MPEC 2020-S163 -- 2016 TZ56
`Q11`	Shinshiro Obs., 1 in MPEC 2020-S155 -- P/2020 Q3
`W88%`	program code "%" (14) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-S168 -- C/2020 R7
`W883`	B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-S168 -- C/2020 R7
`I93`	St. Pardon de Conques Obs. in France, 2 in MPECs 2020-S156 & 2020-S157 -- 2020 SL3, 2020 SK3
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 29 in MPECs 2020-S158, 2020-S159, 2020-S160, 2020-S161, 2020-S162, 2020-S163, 2020-S164, 2020-S165, 2020-S167, 2020-S169 & 2020-S170 -- 2020 SX3, 2020 SW3, 2020 SW, 2020 SV3, 2020 ST3, 2020 SS3, 2020 SQ3, 2020 SQ, 2020 SP3, 2020 SO3, 2020 SO1, 2020 SN3, 2020 SN, 2020 SM3, 2020 SM, 2020 SK2, 2020 SG1, 2020 SF, 2020 SA3, 2020 RS7, 2020 RP6, 2020 RH7, 2020 RH6, 2020 RG1, 2020 RE8, 2020 RA8, 2020 QQ5, 2020 NM1, 2017 SL16
`X02`	Telescope Live in Chile, 1 in MPEC 2020-S168 -- C/2020 R7
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2020-S163 -- 2020 QB2, 2020 FA1
`L01`	Visnjan Obs. in Croatia, 2 in MPECs 2020-S164 & 2020-S170 -- 2020 SX3, 2020 SS3
`I41`	Zwicky Transient Facility (ZTF) in southern California, 7 in MPEC 2020-S163 -- 2020 PX4, 2020 PX1, 2020 MP, 2020 LB3, 2020 KZ5, 2017 XL62, 2007 VX137

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

Impact Risk Monitoring on 23 September '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 SM2	NEODyS	1720	R E M O V E D						-

2020 SO1	JPL Sentry	1720	2101-2101	1	9.829e-07	-7.42	-7.42	0	JPL: Computed at 07:55 today Pacific time based on 77 observations spanning 5.9756 days (2020-Sep-17.40029 to 2020-Sep-23.375911). Diameter approximately 0.013 km. from weighted mean H=27.07.
2020 SO1	NEODyS	1720	2092-2117	6	4.97e-08	-8.74	-8.84	0	NEODyS: "Based on 77 optical observations (of which 0 are rejected as outliers) from 2020-09-17.401 to 2020-09-23.377."

2020 SW	JPL Sentry	1720	2093-2119	6	1.52884e-06	-8.15	-8.49	0	JPL: Computed at 08:04 today Pacific time based on 76 observations spanning 5.0475 days (2020-Sep-18.31827 to 2020-Sep-23.365792). Diameter approximately 0.006 km. from weighted mean H=28.93.
2020 SW	NEODyS	1720	2096-2111	5	3.48e-07	-8.73	-9.27	0	NEODyS: "Based on 76 optical observations (of which 0 are rejected as outliers) from 2020-09-18.319 to 2020-09-23.367."

2020 SQ	JPL Sentry	1720	R E M O V E D						JPL: Risk listing removed at 1442 UTC today

2020 QB2	NEODyS	1720	2112	2	7.47e-09	-8.45	-8.45	0	NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2020-08-14.574 to 2020-09-18.413."

2020 FA1	JPL Sentry	1720	2116-2119	4	4.846392e-06	-6.48	-6.52	0	JPL: Computed at 07:36 today Pacific time based on 72 observations spanning 186.15 days (2020-Mar-16.47938 to 2020-Sep-18.626798). Diameter approximately 0.019 km. from weighted mean H=26.29.
2020 FA1	NEODyS	1720	2117	1	3.54e-09	-9.61	-9.61	0	NEODyS: "Based on 72 optical observations (of which 0 are rejected as outliers) from 2020-03-16.480 to 2020-09-18.628."

2019 DF2	NEODyS	1720	R E M O V E D						-

2016 UR36	NEODyS	1720	2107-2116	4	1.15e-08	-9.24	-9.4	0	NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2016-10-26.286 to 2016-10-30.209."

2014 HJ198	NEODyS	1720	2034-2111	3	1.17e-07	-7.12	-7.18	0	NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2014-04-24.121 to 2014-04-27.067."

2003 WT153	JPL Sentry	1720	2044-2108	57	2.6931148e-05	-6.28	-6.92	0	JPL: Computed at 14:25 April 7th of 2017 Pacific time based on 46 observations spanning 2.5014 days (2003-Nov-29.31488 to 2003-Dec-01.81632). Diameter approximately 0.008 km. from weighted mean H=28.05.

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 23 September '20

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

0008 9/24	Grabbed MPEC 2020-S170 - 2020 SX3 - see above
2045	Grabbed MPEC 2020-S167 - 2020 SV3 - see above Grabbed MPEC 2020-S168 - Comet C/2020 R7 (ATLAS) - see above Grabbed MPEC 2020-S169 - 2020 SW3 - see above
1900	Grabbed MPEC 2020-S166 - 2005 WZ - see above
1720	Noted that JPL Sentry has updated its 2003 WT153 risk assessment - see above Noted that NEODyS has updated its 2014 HJ198 risk assessment - see above Noted that NEODyS has updated its 2016 UR36 risk assessment - see above Noted that NEODyS has removed 2019 DF2 as an impact risk - see above Noted that JPL Sentry has updated its 2020 FA1 risk assessment - see above Noted that NEODyS has updated its 2020 FA1 risk assessment - see above Noted that NEODyS has updated its 2020 QB2 risk assessment - see above Noted that NEODyS has removed 2020 SM2 as an impact risk - see above Noted that JPL Sentry has updated its 2020 SO1 risk assessment - see above Noted that NEODyS has updated its 2020 SO1 risk assessment - see above Noted that JPL Sentry has removed 2020 SQ as an impact risk - see above Noted that JPL Sentry has updated its 2020 SW risk assessment - see above Noted that NEODyS has updated its 2020 SW risk assessment - see above Grabbed MPEC 2020-S159 - 2020 SN3 - see above Grabbed MPEC 2020-S160 - 2020 SO3 - see above Grabbed MPEC 2020-S161 - 2020 SP3 - see above Grabbed MPEC 2020-S162 - 2020 SQ3 - see above Grabbed MPEC 2020-S163 - Daily Orbit Update - see above Grabbed MPEC 2020-S164 - 2020 SS3 - see above Grabbed MPEC 2020-S165 - 2020 ST3 - see above
0410	Grabbed MPEC 2020-S155 - Comet P/2002 T5 = P/2020 Q3 (LINEAR) - see above Grabbed MPEC 2020-S156 - 2020 SK3 - see above Grabbed MPEC 2020-S157 - 2020 SL3 - see above Grabbed MPEC 2020-S158 - 2020 SM3 - see above

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