Contents  on 30 September '20

Asteroid/Comet Connection (A/CC) Resources:

The latest A/CC news is available via framed access, RSS news feed 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 30 September '20

The MPC's NEO Confirmation Page has 27 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 27 objects listed. Of these, sixteen were "one nighters." So far The Tracking News has counted a total of 33 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 30 September '20

Minor Planet Electronic Circulars

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


MPEC 2020-S254 - "22:38 UT" - 2020 MH


<< DOU on 30 September '20 >>  MPEC 2020-S253 - "12:04 UT" - Daily Orbit Update


MPEC 2020-S252 - "11:48 UT" - 2020 LC1


MPEC 2020-S251 - "03:10 UT" - 2020 SC7


MPEC 2020-S250 - "03:08 UT" - 2020 SB7

Observers  on 30 September '20

A total of 54 observers appear in today's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2020-S253 -- 315098
U71AHS Obs., 2 in MPEC 2020-S253 -- 431775, 184990
M43Al Sadeem Obs. in Abu Dhabi, 1 in MPEC 2020-S253 -- 3752
C97Al-Fulaij Obs., 2 in MPEC 2020-S253 -- 52768, 315098
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2020-S253 -- 184990
T05ATLAS Haleakala in Hawaii, 3 in MPEC 2020-S253 -- 2020 SS4, 2020 PM7, 2016 NV38
T08ATLAS Mauna Loa in Hawaii, 5 in MPEC 2020-S253 -- 2020 PD1, 2020 HP8, 2016 ED85, 2013 PY6, 2007 VX137
Q68Blue Mountains Obs. in New South Wales, 1 in MPEC 2020-S253 -- 106589
160Castelmartini Obs. in Italy, 13 in MPEC 2020-S253 -- 2016 RP33, 2016 LZ10, 2016 LS9, 86667, 85989, 66391, 513170, 498066, 436030, 431775, 413989, 137064, 106538
V94Cherokee Ridge Obs., 3 in MPEC 2020-S253 -- 86667, 66391, 106589
Z99Clixby Obs. in England, 1 in MPEC 2020-S253 -- 184990
V16Dark Sky New Mexico Obs. in New Mexico, 1 in MPEC 2020-S253 -- 52768
K87Dettelbach Vineyard Obs. in Germany, 4 in MPEC 2020-S253 -- 2013 UX14, 2013 PY6, 2007 VX137, 2001 SG286
113Drebach Obs. in Germany, 1 in MPEC 2020-S253 -- 65690
734Farpoint Obs. in Kansas, 1 in MPEC 2020-S253 -- 2020 OK5
595Farra d'Isonzo Obs. in Italy, 3 in MPEC 2020-S253 -- 2020 ST6, 2020 RK2, 2020 RJ3
W46Foxfire Village Obs., 1 in MPEC 2020-S253 -- 431775
E89Geyserland Obs. in New Zealand, 3 in MPEC 2020-S253 -- 66391, 65690, 136795
U55Golden Ears Obs., 4 in MPEC 2020-S253 -- 2020 ST6, 2020 RK2, 2004 RF84, 86667
K73Gravina Obs. in Italy, 3 in MPEC 2020-S253 -- 66391, 308043, 105140
196Homburg-Erbach Obs. in Germany, 1 in MPEC 2020-S253 -- 184990
C401program code 1 via Kuban State Univ. Obs. in Russia, 2 in MPEC 2020-S253 -- 438908, 106589
Z43Landehen Obs., 3 in MPEC 2020-S253 -- 85184, 308043, 184990
130Lumezzane Obs. in Italy, 2 in MPEC 2020-S253 -- 498066, 431775
K30Luscherz Obs. in Switzerland, 1 in MPEC 2020-S253 -- 413989
L52MASTER Tavrida, 1 in MPEC 2020-S253 -- 154993
568Mauna Kea in Hawaii, 1 in MPEC 2020-S253 -- 2015 AN193
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2020-S251 & 2020-S254 -- 2020 SC7, 2020 MH
J69North Obs. in England, 1 in MPEC 2020-S253 -- 85989
Z80Northolt Branch Obs. in England, 2 in MPEC 2020-S253 -- 441987, 285990
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2020-S250, 2020-S253 & 2020-S254 -- 2020 SR6, 2020 SB7, 2020 RQ1, 2020 MH, 1999 EO3
F52Pan-STARRS 2 (PS2) in Hawaii, 4 in MPECs 2020-S250 & 2020-S253 -- 2020 SB7, 2020 RY4, 2020 ML3, 2002 GZ8
K63Pascoli Obs. in Italy, 1 in MPEC 2020-S253 -- 431775
B49Paus Obs. in Spain, 1 in MPEC 2020-S253 -- 2020 SR6
L68PESCOPE, 3 in MPEC 2020-S253 -- 498066, 137199, 136795
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2020-S253 -- 498066
V93Pin Oak Obs., 4 in MPEC 2020-S253 -- 86667, 65690, 184990, 159402
W16Pleasant Groves Obs., 1 in MPEC 2020-S253 -- 498066
D29Purple Mtn. Obs. Xuyi Station in China, 5 in MPEC 2020-S253 -- 510073, 498066, 413989, 285990, 184990
L18QOS Obs., 11 in MPEC 2020-S253 -- 2019 NN3, 2019 AP3, 2014 QR295, 66253, 431775, 413989, 308043, 184990, 138127, 106589, 1865
C95SATINO-1 in France, 1 in MPEC 2020-S253 -- 2020 OE4
L38Schafsweide Obs., 1 in MPEC 2020-S253 -- 184990
204Schiaparelli Obs. in Italy, 1 in MPEC 2020-S253 -- 413989
645Sloan Digital Sky Survey in New Mexico, 1 in MPEC 2020-S253 -- 484199
W88*program code "*" (19) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-S253 -- 2004 LU3
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-S253 -- 531060
Q21Southern Utsunomiya in Japan, 1 in MPEC 2020-S253 -- 52768
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2020-S253 -- 2020 SR6
I52Steward Obs. Mt. Lemmon Station in Arizona, 43 in MPECs 2020-S251 & 2020-S253 -- 2020 SY5, 2020 SY2, 2020 SV6, 2020 SV3, 2020 SU4, 2020 ST6, 2020 ST1, 2020 SS5, 2020 SS4, 2020 SR6, 2020 SQ2, 2020 SP5, 2020 SP2, 2020 SN6, 2020 SM6, 2020 SG3, 2020 SG1, 2020 SF6, 2020 SC7, 2020 SC1, 2020 SB, 2020 RY4, 2020 RX8, 2020 RW2, 2020 RQ1, 2020 RG, 2020 RB, 2020 QP6, 2020 QL6, 2020 QH2, 2020 QF5, 2020 QA7, 2020 OS7, 2020 OC8, 2020 NM1, 2020 KR7, 2020 HX5, 2020 HO8, 2018 SQ3, 2017 UP2, 2017 TF2, 2016 TZ56, 2016 FY14
A16Tentlingen Obs. in Switzerland, 4 in MPEC 2020-S253 -- 495615, 382503, 292165, 276732
W33Transit Dreams Obs., 1 in MPEC 2020-S253 -- 66253
L01Visnjan Obs. in Croatia, 3 in MPECs 2020-S251 & 2020-S253 -- 2020 SR6, 2020 SC7, 2020 SA7
C51WISE in Earth polar orbit, 1 in MPEC 2020-S252 -- 2020 LC1
I15Wishing Star Obs. in Rhode Island, 4 in MPEC 2020-S253 -- 66391, 65690, 413989, 106589
I41Zwicky Transient Facility (ZTF) in southern California, 4 in MPECs 2020-S251 & 2020-S253 -- 2020 SC7, 87684, 498066, 382503
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 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 SX6NEODyS17152055-2118339.32e-07-7.36-7.830NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2020-09-26.393 to 2020-09-29.470."
2020 SN6JPL Sentry17152048-2118801.62817722e-05-6.86-7.830JPL: Computed at 06:46 today Pacific time based on 14 observations spanning 3.0475 days (2020-Sep-27.305231 to 2020-Sep-30.352698). Diameter approximately 0.006 km. from weighted mean H=28.79.
2020 SU4JPL Sentry1715R E M O V E DJPL: Risk listing removed at 1330 UTC today
2019 TC2JPL Sentry17152097-2119381.6580171e-05-6.44-7.210JPL: Computed at 06:38 Oct. 8th of 2019 Pacific time based on 21 observations spanning 3.0679 days (2019-Oct-05.21758 to 2019-Oct-08.28546). Diameter approximately 0.009 km. from weighted mean H=27.83.
2019 TDJPL Sentry17152042-206021.7186e-06-7.67-7.840JPL: Computed at 06:52 Oct. 7th of 2019 Pacific time based on 26 observations spanning 5.9951 days (2019-Oct-01.3317 to 2019-Oct-07.32684). Diameter approximately 0.005 km. from weighted mean H=29.18.
2017 AB21JPL Sentry17152024-2110255.6205e-09-5.64-6.130JPL: Computed at 09:38 Jan. 24th of 2017 Pacific time based on 7 observations spanning .97445 days (2017-Jan-03.46971 to 2017-Jan-04.444158). Diameter approximately 0.243 km. from weighted mean H=20.73.
2016 TQ18JPL Sentry17152086-211036.5779e-06-6.13-6.170JPL: Computed at 00:45 April 14th of 2017 Pacific time based on 35 observations spanning 29.983 days (2016-Oct-06.418071 to 2016-Nov-05.401353). Diameter approximately 0.018 km. from weighted mean H=26.32.
2012 SY49JPL Sentry17152031-2114231.2104498e-05-5.05-5.420JPL: Computed at 22:37 April 11th of 2017 Pacific time based on 43 observations spanning 4.1465 days (2012-Sep-22.26616 to 2012-Sep-26.412676). Diameter approximately 0.023 km. from weighted mean H=25.83.
2009 ST171JPL Sentry17152066-206611.164e-06-6.83-6.830JPL: Computed at 07:39 April 11th of 2017 Pacific time based on 19 observations spanning 1.1579 days (2009-Sep-28.23931 to 2009-Sep-29.39719). Diameter approximately 0.015 km. from weighted mean H=26.82.

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 30 September '20

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

2300Grabbed MPEC 2020-S254 - 2020 MH - see above
1715Noted that JPL Sentry has updated its 2009 ST171 risk assessment - see above
Noted that JPL Sentry has updated its 2012 SY49 risk assessment - see above
Noted that JPL Sentry has updated its 2016 TQ18 risk assessment - see above
Noted that JPL Sentry has updated its 2017 AB21 risk assessment - see above
Noted that JPL Sentry has updated its 2019 TC2 risk assessment - see above
Noted that JPL Sentry has updated its 2019 TD risk assessment - see above
Noted that JPL Sentry has updated its 2020 SN6 risk assessment - see above
Noted that JPL Sentry has removed 2020 SU4 as an impact risk - see above
Noted that NEODyS has posted 2020 SX6 as an impact risk - see above
Grabbed MPEC 2020-S252 - 2020 LC1 - see above
Grabbed MPEC 2020-S253 - Daily Orbit Update - see above
0431Grabbed MPEC 2020-S250 - 2020 SB7 - see above
Grabbed MPEC 2020-S251 - 2020 SC7 - see above