Contents  on 26 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 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-S208 - "16:33 UT" - 2020 SJ5


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


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


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


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


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


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


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


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


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


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

Observers  on 26 September '20

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

CodeObserver / observatory
H21Astronomical 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
T05ATLAS 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
T08ATLAS 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
L54Berthelot Obs., 1 in MPEC 2020-S206 -- 2020 PM7
160Castelmartini Obs. in Italy, 1 in MPEC 2020-S206 -- 2016 LZ10
703Catalina 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
V06Catalina 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
J95Great 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
Z43Landehen Obs., 1 in MPEC 2020-S206 -- 2007 VX137
H01Magdalena 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
G96Mt. 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
Z80Northolt Branch Obs. in England, 3 in MPEC 2020-S206 -- 2020 SN, 2020 PD1, 2004 RF84
F51Pan-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
F52Pan-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
H36Sandlot Obs. in Kansas, 1 in MPEC 2020-S208 -- 2020 SJ5
C95SATINO-1 in France, 1 in MPEC 2020-S206 -- 2020 ND
I52Steward 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
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2020-S206 & 2020-S207 -- 2019 VF6, 2009 DR3
L01Visnjan Obs. in Croatia, 1 in MPEC 2020-S208 -- 2020 SJ5
C51WISE 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 SY4NEODyS17002069-209751.39e-06-7.08-7.20NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2020-09-22.382 to 2020-09-25.869."
JPL Sentry04002069-211354.455906e-06-6.63-6.900JPL: 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 SU4JPL Sentry17002112-211211.038e-07-6.72-6.720JPL: 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 SQJPL Sentry1700R E M O V E DJPL: Risk listing removed at 1437 UTC today
2019 SG1JPL Sentry04002064-206418.634e-07-7.14-7.140JPL: 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 FE4JPL Sentry04002085-210161.50548e-06-5.63-5.920JPL: 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 RK2JPL Sentry04002083-208318.612e-06-6.74-6.740JPL: 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 VR139JPL Sentry04002024-2076132.06067e-08-8.39-9.080JPL: 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 TC1JPL Sentry04002064-207231.32291e-06-5.00-5.020JPL: 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.

1700Noted 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
0400Noted 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