Contents  on 23 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 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-S170 - "23:59 UT" - 2020 SX3


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


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


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


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


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


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


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


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


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


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


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


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


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


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


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

Observers  on 23 September '20

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

CodeObserver / observatory
W94AMACS1 in Chile, 1 in MPEC 2020-S168 -- C/2020 R7
H21Astronomical 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
T05ATLAS 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
T08ATLAS 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
215Buchloe Obs. in Germany, 1 in MPEC 2020-S155 -- P/2020 Q3
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2020-S155 -- P/2020 Q3
160Castelmartini Obs. in Italy, 8 in MPEC 2020-S163 -- 2020 RF, 2020 RE1, 2020 LB3, 2018 RV3, 2016 NV38, 2016 ED85, 2013 PY6, 2007 VX137
703Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2020-S160 & 2020-S163 -- 2020 SW, 2020 SO3, 2020 SB, 2004 RF84, 2000 PQ27
970Chelmsford Obs. in England, 1 in MPEC 2020-S163 -- 2020 SW
Z99Clixby Obs. in England, 2 in MPEC 2020-S163 -- 2020 SJ2, 2020 RQ6
958Dax Obs. in France, 1 in MPEC 2020-S156 -- 2020 SK3
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2020-S155 -- P/2020 Q3
J042program code 2 via ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2020-S168 -- C/2020 R7
X31Galilei Obs., 1 in MPEC 2020-S168 -- C/2020 R7
K88GINOP-KHK in Hungary, 5 in MPEC 2020-S163 -- 2020 SW, 2020 RE1, 2020 QM4, 2020 PD1, 2016 ED85
E94Gisborne Obs. in New Zealand, 1 in MPEC 2020-S168 -- C/2020 R7
J95Great Shefford Obs. in England, 1 in MPEC 2020-S164 -- 2020 SS3
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-S163 -- 2020 BH13
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-S168 -- C/2020 R7
Q623Rolando Ligustri in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-S168 -- C/2020 R7
H01Magdalena 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
213Montcabre Obs. in Spain, 1 in MPEC 2020-S163 -- 2020 SW
W73Moquegua Obs., 1 in MPEC 2020-S168 -- C/2020 R7
G96Mt. 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
Z80Northolt Branch Obs. in England, 3 in MPEC 2020-S163 -- 2020 SW, 2020 RE1, 2007 VX137
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2020-S163 -- 2016 ED85
F51Pan-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
F52Pan-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
B49Paus Obs. in Spain, 1 in MPEC 2020-S160 -- 2020 SO3
L18QOS Obs., 2 in MPEC 2020-S163 -- 2020 SN, 2020 PM7
L04ROASTERR-1 in Romania, 1 in MPEC 2020-S163 -- 2020 SK3
C95SATINO-1 in France, 1 in MPEC 2020-S163 -- 2016 TZ56
Q11Shinshiro 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
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-S168 -- C/2020 R7
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2020-S156 & 2020-S157 -- 2020 SL3, 2020 SK3
I52Steward 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
X02Telescope Live in Chile, 1 in MPEC 2020-S168 -- C/2020 R7
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2020-S163 -- 2020 QB2, 2020 FA1
L01Visnjan Obs. in Croatia, 2 in MPECs 2020-S164 & 2020-S170 -- 2020 SX3, 2020 SS3
I41Zwicky 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 SM2NEODyS1720R E M O V E D-
2020 SO1JPL Sentry17202101-210119.829e-07-7.42-7.420JPL: 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.
NEODyS17202092-211764.97e-08-8.74-8.840NEODyS: "Based on 77 optical observations (of which 0 are rejected as outliers) from 2020-09-17.401 to 2020-09-23.377."
2020 SWJPL Sentry17202093-211961.52884e-06-8.15-8.490JPL: 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.
NEODyS17202096-211153.48e-07-8.73-9.270NEODyS: "Based on 76 optical observations (of which 0 are rejected as outliers) from 2020-09-18.319 to 2020-09-23.367."
2020 SQJPL Sentry1720R E M O V E DJPL: Risk listing removed at 1442 UTC today
2020 QB2NEODyS1720211227.47e-09-8.45-8.450NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2020-08-14.574 to 2020-09-18.413."
2020 FA1JPL Sentry17202116-211944.846392e-06-6.48-6.520JPL: 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.
NEODyS1720211713.54e-09-9.61-9.610NEODyS: "Based on 72 optical observations (of which 0 are rejected as outliers) from 2020-03-16.480 to 2020-09-18.628."
2019 DF2NEODyS1720R E M O V E D-
2016 UR36NEODyS17202107-211641.15e-08-9.24-9.40NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2016-10-26.286 to 2016-10-30.209."
2014 HJ198NEODyS17202034-211131.17e-07-7.12-7.180NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2014-04-24.121 to 2014-04-27.067."
2003 WT153JPL Sentry17202044-2108572.6931148e-05-6.28-6.920JPL: 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 9/24Grabbed MPEC 2020-S170 - 2020 SX3 - see above
2045Grabbed 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
1900Grabbed MPEC 2020-S166 - 2005 WZ - see above
1720Noted 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
0410Grabbed 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