2020-09-26 Tracking News

Contents on 26 September '20

IAU Minor Planet Center
- NEOCP Activity -- 62 listings
- New MPECs -- eleven MPECs
Observers -- 21 observers
Impact Risk Monitoring -- eight objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1171 risk-listed objects, 135 have had news in the last 31 days. Updated at 1702 UTC on 26 Sept.
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 26 September '20

The MPC's NEO Confirmation Page has 62 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 62 objects listed. Of these, 40 were "one nighters." So far The Tracking News has counted a total of 83 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 September '20

Minor Planet Electronic Circulars

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

MPEC 2020-S198 time-stamped "00:14 UT" - 2020 SY4 - see below
MPEC 2020-S199 time-stamped "11:25 UT" - 2020 SZ4 - see below
MPEC 2020-S200 time-stamped "11:27 UT" - 2020 SA5 - see below
MPEC 2020-S201 time-stamped "11:27 UT" - 2020 SB5 - see below
MPEC 2020-S202 time-stamped "11:28 UT" - 2020 SC5 - see below
MPEC 2020-S203 time-stamped "11:30 UT" - 2020 SD5 - see below
MPEC 2020-S204 time-stamped "11:34 UT" - 2020 SE5 - see below
MPEC 2020-S205 time-stamped "11:37 UT" - 2020 SF5 - see below
MPEC 2020-S206 time-stamped "12:01 UT" - Daily Orbit Update - see below
MPEC 2020-S207 time-stamped "15:00 UT" - 2019 VF6 - see below
MPEC 2020-S208 time-stamped "16:33 UT" - 2020 SJ5

MPEC 2020-S208 - "16:33 UT" - 2020 SJ5

K20S05J 2020 SJ5 (i=77.4°, q=2.624 AU, Q=33.740 AU, H=16.69 ~1.56 km) was picked up at 1047 UT on 19 Sept. by Pan-STARRS 1 (PS1), observing it at Aug. 30.50-51p2 at G=21.96-22.35, Sept. 1.49-52p4 at G=21.23-22.55, 3.54-56p3 at G=21.85-22.23, 4.56-59p4 at G=20.88-21.79, 19.45-49p3 at w=21.12-23, and 23.46-47p2 at G=20.65-73. This detection was confirmed by the Mt. Lemmon Survey (MLS) (Aug. 28.37-38p2 & Sept. 21.30-31p3), Pan-STARRS 2 (PS2) (Aug. 28.47-48p2, 29.46-48p3, Sept. 3.54p1 & 4.54p1), Visnjan Obs. (Sept. 19.88p3), Astronomical Research Obs. Westfield (Sept. 20.22-23p2 & 21.22-23p3), Steward Obs. Mt. Lemmon Station (Sept. 20.26-27p4 & 21.23-24p4), Sandlot Obs. (Sept. 21.23-26p3), and Hidetaka Sato via iTelescope Obs. Mayhill (Sept. 22.30-31p2).

MPEC 2020-S207 - "15:00 UT" - 2019 VF6

K19V06F 2019 VF6 (Earth MOID=0.5 LD, H=21.1 ~204m) from UH/Tholen NEO Follow-Up 2.24m Telescope (Sept. 15.58p1 at G=22.91 & 16.46p1 at G=22.94)

<< DOU on 26 September '20 >> MPEC 2020-S206 - "12:01 UT" - Daily Orbit Update

Observations of risk-listed objects
K20S04U 2020 SU4 (small asteroid, arc=3 days, H=23.7 ~62m) from Steward Mt. Lemmon Sta. (Sept. 26.48p4)
K20S00Q 2020 SQ (small asteroid, arc=14 days, H=27.4 ~11m, close passer, NHATS target) from MLS (Sept. 25.24-26p3) and Steward Mt. Lemmon Sta. (Sept. 26.24p3)
Observations of close-passing objects
K20S04S 2020 SS4 (Q=4.051 AU, arc=3 days, H=24.4 ~45m) from ATLAS Haleakala (Sept. 25.42-44p4 & 25.49-52p9), ATLAS Mauna Loa (Sept. 25.51p5), and Steward Mt. Lemmon Sta. (Sept. 26.37p4)
K20S04R 2020 SR4 (arc=2 days, H=26.4 ~18m) from Steward Mt. Lemmon Sta. (Sept. 26.13p3)
K20S04O 2020 SO4 from Steward Mt. Lemmon Sta. (Sept. 26.48p3)
K20S04F 2020 SF4 (arc=5 days, H=26.2 ~19m, NHATS target) from the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (Sept. 26.33-34p4)
K20S03A 2020 SA3 (arc=6 days, H=25.4 ~28m, NHATS target) from ATLAS Haleakala (Sept. 25.33-36p4) and Steward Mt. Lemmon Sta. (Sept. 26.13p3)
K20S01M 2020 SM1 (arc=7 days, H=26.2 ~19m, NHATS target) from Steward Mt. Lemmon Sta. (Sept. 26.20p2)
K20S00N 2020 SN (arc=9 days, H=24.8 ~37m) from Northolt Branch Obs. (Sept. 24.87-88p3), ATLAS Mauna Loa (Sept. 25.41-45p4), Great Shefford Obs. (Sept. 25.81p3), and Steward Mt. Lemmon Sta. (Sept. 26.24p4)
K20R07W 2020 RW7 (arc=10 days, H=25.2 ~31m) from PS1 (Sept. 25.51-54p4)
K20R07A 2020 RA7 (arc=11 days, H=27.0 ~13m, NHATS target) from CSS-Kuiper (Sept. 26.30-31p4)
K20R02K 2020 RK2 (arc=15 days, H=24.2 ~49m) from ATLAS Mauna Loa (Sept. 25.40-43p3)
K20P07M 2020 PM7 (Q=4.014 AU, arc=2 opp, H=22.3 ~117m) from Berthelot Obs. (Sept. 24.84-90p5), ATLAS Haleakala (Sept. 25.35-40p4), and Great Shefford Obs. (Sept. 25.82-83p5)
K20J01X 2020 JX1 (arc=135 days, H=23.7 ~62m, NHATS target) from CSS-Kuiper (Sept. 26.28-29p3 at G=22.94-23.48)
K09D03R 2009 DR3 (arc=4 opp, H=21.5 ~170m) from Tholen 2.24m (Sept. 15.32p1 at G=23.63)
K01SS6G 2001 SG286 (arc=6 opp, H=20.9 ~224m) from the Catalina Sky Survey (CSS) (Sept. 25.23-24p3)
Observation campaigns (NHATS targets, radar support)
K20R08T 2020 RT8 (arc=12 days, H=24.4 ~45m, NHATS) from CSS-Kuiper (Sept. 26.26-27p3 at G=21.95-23.07)
K20R07U 2020 RU7 (arc=11 days, H=25.4 ~28m, NHATS) from Steward Mt. Lemmon Sta. (Sept. 26.12p3)
K20R02R 2020 RR2 (arc=16 days, H=25.4 ~28m, NHATS) from Steward Mt. Lemmon Sta. (Sept. 26.15p4)
K20Q04Z 2020 QZ4 (arc=37 days, H=25.5 ~27m, NHATS) from MLS (Sept. 25.40-41p4 at G=21.09-22.18)
K20P01X 2020 PX1 (arc=47 days, H=23.7 ~62m, NHATS) from MLS (Sept. 25.13-15p4) and Steward Mt. Lemmon Sta. (Sept. 26.20p4)
K20H05X 2020 HX5 (arc=158 days, H=22.4 ~112m, NHATS) from Steward Mt. Lemmon Sta. (Sept. 26.14-15p4)
K12H20D 2012 HD20 (arc=3 opp, H=22.3 ~117m, NHATS) from MLS (Sept. 25.27-29p4)
K11C02G 2011 CG2 (arc=3 opp, H=21.4 ~178m, NHATS) from ATLAS Mauna Loa (Sept. 25.36-40p4)
-- NHATS target table
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20S04L 2020 SL4 (arc=5 days, H=24.5 ~43m) from Steward Mt. Lemmon Sta. (Sept. 26.22p3)
K20S04D 2020 SD4 (arc=5 days, H=24.8 ~37m) from CSS-Kuiper (Sept. 26.38p4)
K20S03W 2020 SW3 (arc=4 days, H=26.9 ~14m) from CSS-Kuiper (Sept. 26.25-26p3)
K20S03L 2020 SL3 (arc=11 days, H=25.6 ~26m) from Steward Mt. Lemmon Sta. (Sept. 26.37p4)
K20S02Q 2020 SQ2 (arc=13 days, H=22.9 ~89m) from Steward Mt. Lemmon Sta. (Sept. 26.48-49p4)
K20S02K 2020 SK2 (arc=9 days, H=24.7 ~39m) from MLS (Sept. 25.29-30p4)
K20S01A 2020 SA1 (arc=9 days, H=25.9 ~22m) from CSS-Kuiper (Sept. 26.31-32p4 at G=21.76-23.22)
K20R08A 2020 RA8 (Q=4.022 AU, arc=11 days, H=24.1 ~51m) from MLS (Sept. 25.31-32p4)
K20R07Q 2020 RQ7 (arc=14 days, H=22.9 ~89m) from CSS-Kuiper (Sept. 26.24-25p3 at G=22.52-81)
K20R07F 2020 RF7 (arc=16 days, H=23.3 ~74m) from CSS-Kuiper (Sept. 26.18-19p4 at G=21.63-23.08)
K20R06X 2020 RX6 (arc=12 days, H=25.5 ~27m) from CSS-Kuiper (Sept. 26.33p4)
K20R06P 2020 RP6 (arc=12 days, H=24.9 ~35m) from Steward Mt. Lemmon Sta. (Sept. 26.49p3)
K20R04T 2020 RT4 (arc=13 days, H=25.4 ~28m) from CSS-Kuiper (Sept. 25.50p4 at G=21.48-22.14)
K20R04S 2020 RS4 (arc=15 days, H=23.7 ~62m) from MLS (Sept. 25.27-28p4)
K20R04P 2020 RP4 (arc=17 days, H=23.5 ~68m) from MLS (Sept. 25.20-22p4), PS2 (Sept. 25.47-51p4), and Steward Mt. Lemmon Sta. (Sept. 26.45-48p4)
K20R03Z 2020 RZ3 (Q=4.078 AU, arc=15 days, H=24.9 ~35m) from MLS (Sept. 25.29-30p4)
K20R03X 2020 RX3 (Q=4.399 AU, arc=15 days, H=22.4 ~112m) from MLS (Sept. 25.20-22p4) and PS2 (Sept. 25.47-49p3)
K20R03M 2020 RM3 (arc=38 days, H=22.9 ~89m) from Steward Mt. Lemmon Sta. (Sept. 26.28-31p3)
K20R03J 2020 RJ3 (arc=15 days, H=23.4 ~71m) from ATLAS Mauna Loa (Sept. 25.35-37p4), Great Shefford Obs. (Sept. 25.80p3), and Steward Mt. Lemmon Sta. (Sept. 26.15p4)
K20R00Z 2020 RZ (arc=18 days, H=24.1 ~51m) from PS1 (Sept. 25.47-50p4)
K20R00P 2020 RP (arc=22 days, H=23.4 ~71m) from CSS-Kuiper (Sept. 26.30p2 at G=21.66-22.03)
K20R00A 2020 RA (arc=23 days, H=24.3 ~47m) from CSS-Kuiper (Sept. 26.21-22p3 at G=21.63-22.19)
K20Q03P 2020 QP3 (arc=39 days, H=22.8 ~93m) from Steward Mt. Lemmon Sta. (Sept. 26.24p3 at G=20.14-22.11 & 26.28p1 at G=20.36)
K20Q02D 2020 QD2 (arc=38 days, H=24.4 ~45m) from MLS (Sept. 25.27-28p4)
K20M05O 2020 MO5 (arc=96 days, H=22.4 ~112m) from CSS-Kuiper (Sept. 26.14-15p4 at G=21.35-22.97)
K20S02H 2020 SH2 (i=44.2°, arc=15 days, H=22.0 ~135m) from Steward Mt. Lemmon Sta. (Sept. 26.13p3)
K20S00Y 2020 SY (arc=16 days, H=21.8 ~148m) from PS2 (Sept. 25.47-49p3) and Steward Mt. Lemmon Sta. (Sept. 26.24p3)
K20Q02H 2020 QH2 (arc=56 days, H=21.8 ~148m) from PS1 (Sept. 25.42-45p4)
K20P04M 2020 PM4 (arc=42 days, H=21.9 ~141m) from Steward Mt. Lemmon Sta. (Sept. 26.24p1 & 26.31-33p3)
K20O07K 2020 OK7 (arc=58 days, H=21.8 ~148m) from Steward Mt. Lemmon Sta. (Sept. 26.37-41p4)
K10R12C 2010 RC12 (arc=2 opp, H=21.9 ~141m) from PS1 (Sept. 25.42-46p3)
Observations of other objects
K20S04E 2020 SE4 (arc=7 days, H=19.3 ~467m) from WISE (Sept. 23.54p1, 23.67p2, 23.74p1, 23.87p1, 23.93p1, 23.99p1, 24.06p1, 24.13p1, 24.19p2, 24.26p1, 24.32p1, 24.52p1, 24.59p1, 24.65p1 & 24.72p1)
K20S03Q 2020 SQ3 from Steward Mt. Lemmon Sta. (Sept. 26.16p2)
K20S03K 2020 SK3 from Steward Mt. Lemmon Sta. (Sept. 26.15p4)
K20S03E 2020 SE3 (q=0.384 AU, Q=4.664 AU, arc=20 days, H=20.9 ~224m) from Steward Mt. Lemmon Sta. (Sept. 26.19p2)
K20S02W 2020 SW2 (arc=7 days, H=20.7 ~245m) from CSS-Kuiper (Sept. 25.49-50p3)
K20S01T 2020 ST1 (arc=30 days, H=21.6 ~162m) from Steward Mt. Lemmon Sta. (Sept. 26.16-18p4)
K20S01G 2020 SG1 (arc=9 days, H=19.8 ~371m) from Steward Mt. Lemmon Sta. (Sept. 26.12p3)
K20S00B 2020 SB (Q=0.988 AU, arc=9 days, H=20.3 ~295m) from CSS (Sept. 25.14-16p4)
K20R09O 2020 RO9 (Q=4.009 AU, arc=12 days, H=18.5 ~676m) from MLS (Sept. 25.49-51p4) and Steward Mt. Lemmon Sta. (Sept. 26.45-46p3)
K20R08X 2020 RX8 (Q=0.990 AU, arc=11 days, H=19.7 ~389m) from Steward Mt. Lemmon Sta. (Sept. 26.11p3)
K20R06O 2020 RO6 from CSS-Kuiper (Sept. 25.26-27p4)
K20R01E 2020 RE1 (i=56.2°, arc=23 days, H=20.6 ~257m) from Steward Mt. Lemmon Sta. (Sept. 26.21-23p4)
K20Q06Z 2020 QZ6 (Q=5.054 AU, arc=29 days, H=19.1 ~513m) from CSS-Kuiper (Sept. 26.41-42p4)
K20Q06U 2020 QU6 (arc=29 days, H=18.2 ~776m) from ATLAS Haleakala (Sept. 25.36-40p3)
K20Q04M 2020 QM4 (arc=37 days, H=18.6 ~645m) from ATLAS Mauna Loa (Sept. 25.50-53p7)
K20Q03B 2020 QB3 (i=47.7°, Q=5.302 AU, arc=60 days, H=18.2 ~776m) from CSS-Kuiper (Sept. 26.20p2)
K20Q02W 2020 QW2 (arc=39 days, H=20.5 ~269m) from Steward Mt. Lemmon Sta. (Sept. 26.16-17p4)
K20P05C 2020 PC5 (Q=4.177 AU, arc=42 days, H=18.5 ~676m) from ATLAS Mauna Loa (Sept. 25.35-37p4 & 25.41p1)
K20P01D 2020 PD1 (Q=4.135 AU, arc=95 days, H=19.3 ~467m) from Northolt Branch Obs. (Sept. 24.89-90p3) and ATLAS Mauna Loa (Sept. 25.41-44p8)
K20O06X 2020 OX6 (arc=57 days, H=21.3 ~186m) from MLS (Sept. 25.27-29p4)
K20N00D 2020 ND (arc=66 days, H=21.7 ~155m) from SATINO-1 (July 9.94p3)
K20N00A 2020 NA (arc=84 days, H=21.5 ~170m) from PS2 (Sept. 25.47-48p2)
K20M03L 2020 ML3 (arc=3 opp, H=20.6 ~257m) from PS1 (Sept. 25.41-45p4) and PS2 (Sept. 25.42-44p3)
K20L02A 2020 LA2 (Q=7.490 AU, arc=102 days, H=19.8 ~371m) from ATLAS Mauna Loa (Sept. 25.54-55p4)
K20K05Z 2020 KZ5 (arc=122 days, H=20.0 ~339m) from PS1 (Sept. 25.47-51p3)
K20K03N 2020 KN3 (Q=5.237 AU, arc=131 days, H=19.6 ~407m) from CSS-Kuiper (Sept. 26.46-47p4 at G=22.09-23.55)
K20H08P 2020 HP8 (arc=5 opp, H=20.3 ~295m) from CSS (Sept. 25.27-29p4)
K19G03Q 2019 GQ3 (arc=2 opp, H=20.7 ~245m) from ATLAS Haleakala (Sept. 25.43-45p4)
K17R15D 2017 RD15 (arc=3 opp, H=19.5 ~426m) from MLS (Sept. 25.29-30p4)
K16R40Y 2016 RY40 (arc=3 opp, H=19.0 ~537m) from PS2 (Sept. 25.51-55p3)
K16N38V 2016 NV38 (Q=4.019 AU, arc=2 opp, H=18.6 ~645m) from ATLAS Haleakala (Sept. 25.54-55p4) and PS1 (Sept. 25.60-61p3)
K16L10Z 2016 LZ10 (arc=2 opp, H=20.0 ~339m) from Castelmartini Obs. (2016 Aug. 13.87p3)
K16E85D 2016 ED85 (Q=5.062 AU, arc=3 opp, H=17.7 ~977m) from CSS (Sept. 25.36-37p4) and ATLAS Mauna Loa (Sept. 25.50-53p4)
K13U14X 2013 UX14 (arc=4 opp, H=18.2 ~776m) from ATLAS Haleakala (Sept. 25.54-55p4)
K13TE4V 2013 TV144 (arc=3 opp, H=20.7 ~245m) from ATLAS Haleakala (Sept. 25.38-40p4)
K13T05S 2013 TS5 (i=54.3°, arc=4 opp, H=19.2 ~490m) from PS2 (Sept. 25.57-60p7)
K13P06Y 2013 PY6 (arc=4 opp, H=19.3 ~467m) from ATLAS Mauna Loa (Sept. 25.42-45p4)
K13B27G 2013 BG27 (arc=5 opp, H=20.4 ~282m) from PS1 (Sept. 25.61-62p3)
K11G27O 2011 GO27 (arc=4 opp, H=18.9 ~562m) from CSS (Sept. 25.38-40p3)
K09F29Y 2009 FY29 (arc=3 opp, H=20.1 ~323m) from MLS (Sept. 25.20-22p4)
K08SF0W 2008 SW150 (arc=4 opp, H=19.6 ~407m) from ATLAS Haleakala (Sept. 25.51-53p4)
K07VD7X 2007 VX137 (arc=5 opp, H=18.5 ~676m) from Landehen Obs. (Sept. 23.95-96p2) and MLS (Sept. 25.21-22p4)
K06S19S 2006 SS19 (Q=4.404 AU, arc=3 opp, H=18.9 ~562m) from ATLAS Haleakala (Sept. 25.46-47p4)
K05Q10S 2005 QS10 (arc=4 opp, H=18.8 ~589m) from ATLAS Haleakala (Sept. 25.35-40p4)
K04R84F 2004 RF84 (arc=4 opp, H=18.3 ~741m) from Northolt Branch Obs. (Sept. 24.91-93p2) and CSS (Sept. 25.30-31p3)
K00P27Q 2000 PQ27 (arc=3 opp, H=19.9 ~355m) from ATLAS Mauna Loa (Sept. 25.35-44p5)
J99E03O 1999 EO3 (Q=4.305 AU, arc=2 opp, H=19.0 ~537m) from MLS (Sept. 25.42-43p4)
02368 2368 Beltrovata (1977 RA) from WISE (Sept. 24.05p1, 24.18p1, 24.31p2, 24.44p1, 24.57p1, 24.64p1, 24.77p1, 24.90p1, 25.16p1 & 25.29p1)

MPEC 2020-S205 - "11:37 UT" - 2020 SF5

K20S05F 2020 SF5 (small asteroid, H=25.9 ~22m) was picked up at 1103 UT on 24 Sept. by MLS, observing it at Sept. 24.46-50p7 and 25.44p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Sept. 26.40-41p3).

MPEC 2020-S204 - "11:34 UT" - 2020 SE5

K20S05E 2020 SE5 (small asteroid, H=24.1 ~51m) was picked up at 0759 UT on 24 Sept. by MLS, observing it at Sept. 24.33-35p4 at G=21.24-22.39 and 24.42p2 at G=20.95-21.03. This detection was confirmed by Magdalena Ridge Obs. (MRO) (Sept. 24.37-39p4), ARO Westfield (Sept. 25.24-27p4 at V=21.5-8 & 26.26-27p2 at V=22.1-4), CSS-Kuiper (Sept. 25.35p2), and Steward Mt. Lemmon Sta. (Sept. 26.36p2).

MPEC 2020-S203 - "11:30 UT" - 2020 SD5

K20S05D 2020 SD5 (small asteroid, H=25.8 ~23m) was picked up at 0640 UT on 24 Sept. by MLS, observing it at Sept. 24.28-29p4. This detection was confirmed by MRO (Sept. 24.31-34p4), Steward Mt. Lemmon Sta. (Sept. 24.40p3, 25.21-22p3 & 26.28p3), and ARO Westfield (Sept. 25.20-21p3).

MPEC 2020-S202 - "11:28 UT" - 2020 SC5

K20S05C 2020 SC5 (small asteroid, Earth MOID=9.3 LD, H=25.6 ~26m) was picked up at 1033 UT on 24 Sept. by MLS, observing it at Sept. 24.44-46p4. This detection was confirmed by MRO (Sept. 24.47-49p4), Steward Mt. Lemmon Sta. (Sept. 24.50p3, 25.35p3 & 26.39-40p2), and ARO Westfield (Sept. 25.34-35p3 & 26.30-31p3).

MPEC 2020-S201 - "11:27 UT" - 2020 SB5

K20S05B 2020 SB5 (small asteroid, H=24.8 ~37m) was picked up at 0939 UT on 24 Sept. by MLS, observing it at Sept. 24.40-42p4 at G=20.66-21.02 and 25.42-43p4 at G=21.4-22.5. This detection was confirmed by MRO (Sept. 24.43-45p4), Steward Mt. Lemmon Sta. (Sept. 24.49-50p4 & 25.37-38p3), ARO Westfield (Sept. 25.34-35p3), and CSS-Kuiper (Sept. 26.37p3).

MPEC 2020-S200 - "11:27 UT" - 2020 SA5

K20S05A 2020 SA5 (Q=4.258 AU, Earth MOID=3.9 LD, H=25.3 ~29m) was picked up at 0556 UT on 24 Sept. by CSS, observing it at Sept. 24.25-26p4. This detection was confirmed by MRO (Sept. 24.28-31p4), Steward Mt. Lemmon Sta. (Sept. 24.36p4, 25.22p4 & 26.18-19p3), ARO Westfield (Sept. 25.22-23p3 & 26.20-21p3), and MLS (Sept. 25.29-31p4).

MPEC 2020-S199 - "11:25 UT" - 2020 SZ4

K20S04Z 2020 SZ4 (small asteroid, H=23.0 ~85m) was picked up at 1014 UT on 22 Sept. by PS1, observing it at Sept. 22.43-45p3 at w=22.04-37. This detection was confirmed by ARO Westfield (Sept. 25.13-15p3 at V=22.3-5 & 26.11-13p3 at V=22.1-2) and CSS-Kuiper (Sept. 26.16-18p4 at G=22.42-90).

MPEC 2020-S198 - "00:14 UT" - 2020 SY4

K20S04Y 2020 SY4 (risk listed, Earth MOID=0.6 LD, H=27.4 ~11m, close passer) was picked up at 0424 UT on 25 Sept. by MLS, observing it at Sept. 22.38-39p3 at G=21.3-22.2 and 25.18-19p3 at G=20.05-38. This detection was confirmed by Steward Mt. Lemmon Sta. (Sept. 25.30p4), PS2 (Sept. 25.46-50p4), and Great Shefford Obs. (Sept. 25.84-87p3).

Observers on 26 September '20

A total of 21 observers appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2020-S199, 2020-S200, 2020-S201, 2020-S202, 2020-S203, 2020-S204 & 2020-S208 -- 2020 SZ4, 2020 SJ5, 2020 SE5, 2020 SD5, 2020 SC5, 2020 SB5, 2020 SA5
`T05`	ATLAS Haleakala in Hawaii, 11 in MPEC 2020-S206 -- 2020 SS4, 2020 SA3, 2020 QU6, 2020 PM7, 2019 GQ3, 2016 NV38, 2013 UX14, 2013 TV144, 2008 SW150, 2006 SS19, 2005 QS10
`T08`	ATLAS Mauna Loa in Hawaii, 12 in MPEC 2020-S206 -- 2020 SS4, 2020 SN, 2020 RK2, 2020 RJ3, 2020 QM4, 2020 PD1, 2020 PC5, 2020 LA2, 2016 ED85, 2013 PY6, 2011 CG2, 2000 PQ27
`L54`	Berthelot Obs., 1 in MPEC 2020-S206 -- 2020 PM7
`160`	Castelmartini Obs. in Italy, 1 in MPEC 2020-S206 -- 2016 LZ10
`703`	Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2020-S200 & 2020-S206 -- 2020 SB, 2020 SA5, 2020 HP8, 2016 ED85, 2011 GO27, 2004 RF84, 2001 SG286
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 22 in MPECs 2020-S199, 2020-S201, 2020-S204 & 2020-S206 -- 2020 SZ4, 2020 SW3, 2020 SW2, 2020 SF4, 2020 SE5, 2020 SD4, 2020 SB5, 2020 SA1, 2020 RX6, 2020 RT8, 2020 RT4, 2020 RQ7, 2020 RP, 2020 RO6, 2020 RF7, 2020 RA7, 2020 RA, 2020 QZ6, 2020 QB3, 2020 MO5, 2020 KN3, 2020 JX1
`J95`	Great Shefford Obs. in England, 4 in MPECs 2020-S198 & 2020-S206 -- 2020 SY4, 2020 SN, 2020 RJ3, 2020 PM7
`H06\|`	Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2020-S208 -- 2020 SJ5
`Z43`	Landehen Obs., 1 in MPEC 2020-S206 -- 2007 VX137
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2020-S200, 2020-S201, 2020-S202, 2020-S203 & 2020-S204 -- 2020 SE5, 2020 SD5, 2020 SC5, 2020 SB5, 2020 SA5
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 25 in MPECs 2020-S198, 2020-S200, 2020-S201, 2020-S202, 2020-S203, 2020-S204, 2020-S205, 2020-S206 & 2020-S208 -- 2020 SY4, 2020 SQ, 2020 SK2, 2020 SJ5, 2020 SF5, 2020 SE5, 2020 SD5, 2020 SC5, 2020 SB5, 2020 SA5, 2020 RZ3, 2020 RX3, 2020 RS4, 2020 RP4, 2020 RO9, 2020 RA8, 2020 QZ4, 2020 QD2, 2020 PX1, 2020 OX6, 2017 RD15, 2012 HD20, 2009 FY29, 2007 VX137, 1999 EO3
`Z80`	Northolt Branch Obs. in England, 3 in MPEC 2020-S206 -- 2020 SN, 2020 PD1, 2004 RF84
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2020-S199, 2020-S206 & 2020-S208 -- 2020 SZ4, 2020 SJ5, 2020 RZ, 2020 RW7, 2020 QH2, 2020 ML3, 2020 KZ5, 2016 NV38, 2013 BG27, 2010 RC12
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 9 in MPECs 2020-S198, 2020-S206 & 2020-S208 -- 2020 SY4, 2020 SY, 2020 SJ5, 2020 RX3, 2020 RP4, 2020 NA, 2020 ML3, 2016 RY40, 2013 TS5
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2020-S208 -- 2020 SJ5
`C95`	SATINO-1 in France, 1 in MPEC 2020-S206 -- 2020 ND
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 41 in MPECs 2020-S198, 2020-S200, 2020-S201, 2020-S202, 2020-S203, 2020-S204, 2020-S205, 2020-S206 & 2020-S208 -- 2020 SY4, 2020 SY, 2020 SU4, 2020 ST1, 2020 SS4, 2020 SR4, 2020 SQ3, 2020 SQ2, 2020 SQ, 2020 SO4, 2020 SN, 2020 SM1, 2020 SL4, 2020 SL3, 2020 SK3, 2020 SJ5, 2020 SH2, 2020 SG1, 2020 SF5, 2020 SE5, 2020 SE3, 2020 SD5, 2020 SC5, 2020 SB5, 2020 SA5, 2020 SA3, 2020 RX8, 2020 RU7, 2020 RR2, 2020 RP6, 2020 RP4, 2020 RO9, 2020 RM3, 2020 RJ3, 2020 RE1, 2020 QW2, 2020 QP3, 2020 PX1, 2020 PM4, 2020 OK7, 2020 HX5
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2020-S206 & 2020-S207 -- 2019 VF6, 2009 DR3
`L01`	Visnjan Obs. in Croatia, 1 in MPEC 2020-S208 -- 2020 SJ5
`C51`	WISE in Earth polar orbit, 2 in MPEC 2020-S206 -- 2020 SE4, 2368

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

Impact Risk Monitoring on 26 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 SY4	NEODyS	1700	2069-2097	5	1.39e-06	-7.08	-7.2	0	NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2020-09-22.382 to 2020-09-25.869."
2020 SY4	JPL Sentry	0400	2069-2113	5	4.455906e-06	-6.63	-6.90	0	JPL: Computed at 18:30 Sept. 25th Pacific time based on 17 observations spanning 3.4867 days (2020-Sep-22.38159 to 2020-Sep-25.868333). Diameter approximately 0.011 km. from weighted mean H=27.45.

2020 SU4	JPL Sentry	1700	2112-2112	1	1.038e-07	-6.72	-6.72	0	JPL: Computed at 07:49 today Pacific time based on 26 observations spanning 2.9723 days (2020-Sep-23.505989 to 2020-Sep-26.478262). Diameter approximately 0.062 km. from weighted mean H=23.69.

2020 SQ	JPL Sentry	1700	R E M O V E D						JPL: Risk listing removed at 1437 UTC today

2019 SG1	JPL Sentry	0400	2064-2064	1	8.634e-07	-7.14	-7.14	0	JPL: Computed at 06:29 Sept. 27th of 2019 Pacific time based on 25 observations spanning 2.6226 days (2019-Sep-20.28714 to 2019-Sep-22.90971). Diameter approximately 0.010 km. from weighted mean H=27.67.

2018 FE4	JPL Sentry	0400	2085-2101	6	1.50548e-06	-5.63	-5.92	0	JPL: Computed at 07:28 April 13th of 2018 Pacific time based on 31 observations spanning 10.126 days (2018-Mar-20.4591 to 2018-Mar-30.585238). Diameter approximately 0.038 km. from weighted mean H=24.73.

2017 RK2	JPL Sentry	0400	2083-2083	1	8.612e-06	-6.74	-6.74	0	JPL: Computed at 07:56 Sept. 21st of 2017 Pacific time based on 29 observations spanning 6.1708 days (2017-Sep-13.31727 to 2017-Sep-19.4881). Diameter approximately 0.009 km. from weighted mean H=28.00.

2010 VR139	JPL Sentry	0400	2024-2076	13	2.06067e-08	-8.39	-9.08	0	JPL: Computed at 11:46 April 7th of 2017 Pacific time based on 7 observations spanning .06429 days (2010-Nov-14.33679 to 2010-Nov-14.40108). Diameter approximately 0.015 km. from weighted mean H=26.71.

1996 TC1	JPL Sentry	0400	2064-2072	3	1.32291e-06	-5.00	-5.02	0	JPL: Computed at 21:53 April 9th of 2017 Pacific time based on 14 observations spanning 7.0740 days (1996-Oct-04.16409 to 1996-Oct-11.23809). Diameter approximately 0.055 km. from weighted mean H=23.94.

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 September '20

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

1700

Noted that JPL Sentry has removed 2020 SQ as an impact risk - see above
Noted that JPL Sentry has updated its 2020 SU4 risk assessment - see above
Noted that NEODyS has posted 2020 SY4 as an impact risk - see above
Grabbed MPEC 2020-S199 - 2020 SZ4 - see above
Grabbed MPEC 2020-S200 - 2020 SA5 - see above
Grabbed MPEC 2020-S201 - 2020 SB5 - see above
Grabbed MPEC 2020-S202 - 2020 SC5 - see above
Grabbed MPEC 2020-S203 - 2020 SD5 - see above
Grabbed MPEC 2020-S204 - 2020 SE5 - see above
Grabbed MPEC 2020-S205 - 2020 SF5 - see above
Grabbed MPEC 2020-S206 - Daily Orbit Update - see above
Grabbed MPEC 2020-S207 - 2019 VF6 - see above
Grabbed MPEC 2020-S208 - 2020 SJ5 - see above

0400

Noted that JPL Sentry has updated its 1996 TC1 risk assessment - see above
Noted that JPL Sentry has updated its 2010 VR139 risk assessment - see above
Noted that JPL Sentry has updated its 2017 RK2 risk assessment - see above
Noted that JPL Sentry has updated its 2018 FE4 risk assessment - see above
Noted that JPL Sentry has updated its 2019 SG1 risk assessment - see above
Noted that JPL Sentry has posted 2020 SY4 as an impact risk - see above
Grabbed MPEC 2020-S198 - 2020 SY4 - see above

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