Contents  on 28 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 28 September '20

The MPC's NEO Confirmation Page has 41 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 41 objects listed. Of these, 27 were "one nighters." So far The Tracking News has counted a total of 72 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 28 September '20

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 20 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2020-S239 - "22:50 UT" - Comet C/2020 S4 (Panstarrs)


MPEC 2020-S238 - "19:29 UT" - 2020 SP6


MPEC 2020-S237 - "19:18 UT" - 2020 SN6


MPEC 2020-S236 - "19:16 UT" - 2020 SM6


MPEC 2020-S235 - "19:13 UT" - 2020 SL6


MPEC 2020-S234 - "14:41 UT" - 2009 DM45


MPEC 2020-S233 - "14:09 UT" - 2020 SK6


MPEC 2020-S232 - "14:07 UT" - 2020 SJ6


MPEC 2020-S231 - "14:05 UT" - 2020 SH6


<< DOU on 28 September '20 >>  MPEC 2020-S230 - "12:02 UT" - Daily Orbit Update


MPEC 2020-S229 - "11:46 UT" - 2020 SG6


MPEC 2020-S228 - "11:46 UT" - 2020 SF6


MPEC 2020-S227 - "06:16 UT" - 2020 SD6


MPEC 2020-S226 - "06:12 UT" - 2020 SC6


MPEC 2020-S225 - "06:11 UT" - 2020 SB6


MPEC 2020-S224 - "00:32 UT" - 2020 SY5


MPEC 2020-S223 - "00:29 UT" - 2020 SX5


MPEC 2020-S222 - "00:28 UT" - 2020 SW5


MPEC 2020-S221 - "00:27 UT" - 2020 SV5


MPEC 2020-S220 - "00:26 UT" - 2020 SU5

Observers  on 28 September '20

A total of 28 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2020-S222, 2020-S223, 2020-S224, 2020-S227, 2020-S228, 2020-S232 & 2020-S236 -- 2020 SY5, 2020 SX5, 2020 SW5, 2020 SM6, 2020 SJ6, 2020 SF6, 2020 SD6
T05ATLAS Haleakala in Hawaii, 2 in MPEC 2020-S230 -- 2020 RJ3, 2016 ED85
T08ATLAS Mauna Loa in Hawaii, 6 in MPEC 2020-S230 -- 2020 SS4, 2020 SK5, 2020 PM7, 2016 NV38, 2013 TV144, 2004 LU3
160Castelmartini Obs. in Italy, 2 in MPEC 2020-S230 -- 2016 LZ10, 471241
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2020-S230 -- 2020 SS4, 2020 SB, 2016 NV38, 2013 UX14, 2002 TS67
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 6 in MPECs 2020-S226, 2020-S230, 2020-S231, 2020-S233 & 2020-S235 -- 2020 SQ3, 2020 SO3, 2020 SL6, 2020 SK6, 2020 SH6, 2020 SC6
W843program code 3 via DECam in Chile, 1 in MPEC 2020-S234 -- 2009 DM45
J045program code 5 via ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2020-S234 -- 2009 DM45
F652Lothar Kurtze in Germany via Faulkes Telescope North in Hawaii, 1 in MPEC 2020-S239 -- C/2020 S4
E10*program code "*" (19) via Faulkes Telescope South in New South Wales, 1 in MPEC 2020-S239 -- C/2020 S4
203GiaGa Obs. in Italy, 1 in MPEC 2020-S220 -- 2020 SU5
E94Gisborne Obs. in New Zealand, 1 in MPEC 2020-S239 -- C/2020 S4
J95Great Shefford Obs. in England, 4 in MPECs 2020-S220, 2020-S221, 2020-S230 & 2020-S236 -- 2020 SY4, 2020 SV5, 2020 SU5, 2020 SM6
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-S239 -- C/2020 S4
568^R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2020-S239 -- C/2020 S4
711McDonald Obs. in Texas, 1 in MPEC 2020-S239 -- C/2020 S4
G96Mt. Lemmon Survey (MLS) in Arizona, 29 in MPECs 2020-S220, 2020-S221, 2020-S222, 2020-S223, 2020-S225, 2020-S226, 2020-S227, 2020-S228, 2020-S229, 2020-S230, 2020-S231, 2020-S232, 2020-S233, 2020-S235, 2020-S237, 2020-S238 & 2020-S239 -- 2020 SX5, 2020 SW5, 2020 SV5, 2020 SU5, 2020 SU2, 2020 SP6, 2020 SN6, 2020 SL6, 2020 SK6, 2020 SJ6, 2020 SH6, 2020 SG6, 2020 SF6, 2020 SD6, 2020 SC6, 2020 SB6, C/2020 S4, 2020 RZ, 2020 RV8, 2020 QY4, 2020 PD1, 2020 OA4, 2020 KZ5, 2019 NC1, 2016 CB32, 2015 BF4, 2013 EW27, 2008 CZ118, 2002 JQ9
C47Nonndorf Obs. in Austria, 1 in MPEC 2020-S230 -- 2020 SS5
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPECs 2020-S224, 2020-S230, 2020-S236 & 2020-S239 -- 2020 SY5, 2020 SN1, 2020 SM6, 2020 SL, C/2020 S4, 2020 RV8, 2020 RQ1, 2017 ST20, 2014 VU1, 2010 RC12, 2004 XP14
F52Pan-STARRS 2 (PS2) in Hawaii, 6 in MPEC 2020-S230 -- 2020 QO5, 2020 ML3, 2020 KZ5, 2013 TS5, 2005 WZ, 2000 PQ27
B49Paus Obs. in Spain, 1 in MPEC 2020-S238 -- 2020 SP6
L18QOS Obs., 1 in MPEC 2020-S230 -- 2016 ED85
L04ROASTERR-1 in Romania, 2 in MPEC 2020-S230 -- 2020 PD1, 2020 PC5
C95SATINO-1 in France, 1 in MPEC 2020-S230 -- 2020 OD
204Schiaparelli Obs. in Italy, 1 in MPEC 2020-S220 -- 2020 SU5
I52Steward Obs. Mt. Lemmon Station in Arizona, 13 in MPECs 2020-S220, 2020-S221, 2020-S222, 2020-S223, 2020-S224, 2020-S225, 2020-S226, 2020-S227, 2020-S228, 2020-S229, 2020-S232, 2020-S237 & 2020-S239 -- 2020 SY5, 2020 SX5, 2020 SW5, 2020 SV5, 2020 SU5, 2020 SN6, 2020 SJ6, 2020 SG6, 2020 SF6, 2020 SD6, 2020 SC6, 2020 SB6, C/2020 S4
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-S230 -- 2016 EU85
L01Visnjan Obs. in Croatia, 1 in MPEC 2020-S239 -- C/2020 S4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 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 SP6JPL Sentry20302073-210752.89836e-06-6.56-6.660JPL: Computed at 13:28 today Pacific time based on 15 observations spanning .59447 days (2020-Sep-28.201621 to 2020-Sep-28.796088). Diameter approximately 0.018 km. from weighted mean H=26.38.
2020 SN6JPL Sentry21022048-2116892.24884141e-05-6.79-7.730JPL: Computed at 13:48 today Pacific time based on 11 observations spanning 1.0108 days (2020-Sep-27.305231 to 2020-Sep-28.316012). Diameter approximately 0.005 km. from weighted mean H=29.01.
2020 SL6JPL Sentry20302092-211043.637024e-07-7.92-8.060JPL: Computed at 13:28 today Pacific time based on 11 observations spanning 1.0215 days (2020-Sep-27.306147 to 2020-Sep-28.327633). Diameter approximately 0.009 km. from weighted mean H=27.81.
2020 SW5NEODyS17452089-2118532.45e-06-6.14-6.70NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2020-09-25.354 to 2020-09-27.267."
JPL Sentry05002077-2117272.3137352e-06-6.14-6.650JPL: Computed at 18:32 Sept. 27th Pacific time based on 16 observations spanning 1.9135 days (2020-Sep-25.353213 to 2020-Sep-27.266683). Diameter approximately 0.024 km. from weighted mean H=25.78.
2020 SN5NEODyS05002043-2116121.25e-06-7.15-7.180NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2020-09-25.419 to 2020-09-27.270."
2020 SK5JPL Sentry1745R E M O V E DJPL: Risk listing removed at 1358 UTC today
NEODyS1745204818.06e-08-5.96-5.960NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2020-09-25.342 to 2020-09-27.376."
2020 SY4JPL Sentry17452061-211343.08062e-06-6.72-6.810JPL: Computed at 07:00 today Pacific time based on 25 observations spanning 5.4941 days (2020-Sep-22.38159 to 2020-Sep-27.875645). Diameter approximately 0.011 km. from weighted mean H=27.38.
NEODyS17452069-211342.62e-06-6.81-6.980NEODyS #2 for the day: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2020-09-22.382 to 2020-09-27.876."
2020 SO1NEODyS05002101-210731.54e-09-10.24-10.270NEODyS: "Based on 88 optical observations (of which 1 are rejected as outliers) from 2020-09-17.401 to 2020-09-27.392."
2017 SA21JPL Sentry05002056-205611.672e-07-8.28-8.280JPL: Computed at 07:51 Oct. 17th of 2017 Pacific time based on 32 observations spanning 2.0206 days (2017-Sep-29.34186 to 2017-Oct-01.3625). Diameter approximately 0.007 km. from weighted mean H=28.32.
2011 TOJPL Sentry05002063-207655.99053e-06-5.88-5.890JPL: Computed at 18:37 April 12th of 2017 Pacific time based on 41 observations spanning 469.18 days (2011-Oct-01.23672 to 2013-Jan-12.420455). Diameter approximately 0.019 km. from weighted mean H=26.26.
2010 TDJPL Sentry05002072-209152.6952e-06-6.31-6.660JPL: Computed at 00:00 April 12th of 2017 Pacific time based on 37 observations spanning 8.1633 days (2010-Oct-01.20604 to 2010-Oct-09.36932). Diameter approximately 0.014 km. from weighted mean H=26.86.

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 28 September '20

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

2330Grabbed MPEC 2020-S239 - Comet C/2020 S4 (Panstarrs) - see above
2102Noted that JPL Sentry has posted 2020 SN6 as an impact risk - see above
2030Noted that JPL Sentry has posted 2020 SL6 as an impact risk - see above
Noted that JPL Sentry has posted 2020 SP6 as an impact risk - see above
2000Grabbed MPEC 2020-S235 - 2020 SL6 - see above
Grabbed MPEC 2020-S236 - 2020 SM6 - see above
Grabbed MPEC 2020-S237 - 2020 SN6 - see above
Grabbed MPEC 2020-S238 - 2020 SP6 - see above
1745Noted that JPL Sentry has removed 2020 SK5 as an impact risk - see above
Noted that NEODyS has updated its 2020 SK5 risk assessment - see above
Noted that NEODyS has posted 2020 SW5 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 SY4 risk assessment - see above
Noted that NEODyS has updated its 2020 SY4 risk assessment - see above
Grabbed MPEC 2020-S225 - 2020 SB6 - see above
Grabbed MPEC 2020-S226 - 2020 SC6 - see above
Grabbed MPEC 2020-S227 - 2020 SD6 - see above
Grabbed MPEC 2020-S228 - 2020 SF6 - see above
Grabbed MPEC 2020-S229 - 2020 SG6 - see above
Grabbed MPEC 2020-S230 - Daily Orbit Update - see above
Grabbed MPEC 2020-S231 - 2020 SH6 - see above
Grabbed MPEC 2020-S232 - 2020 SJ6 - see above
Grabbed MPEC 2020-S233 - 2020 SK6 - see above
Grabbed MPEC 2020-S234 - 2009 DM45 - see above
0500Noted that JPL Sentry has updated its 2010 TD risk assessment - see above
Noted that JPL Sentry has updated its 2011 TO risk assessment - see above
Noted that JPL Sentry has updated its 2017 SA21 risk assessment - see above
Noted that NEODyS has posted 2020 SN5 as an impact risk - see above
Noted that NEODyS has updated its 2020 SO1 risk assessment - see above
Noted that JPL Sentry has posted 2020 SW5 as an impact risk - see above
Noted that NEODyS has updated its 2020 SY4 risk assessment - see above
Grabbed MPEC 2020-S220 - 2020 SU5 - see above
Grabbed MPEC 2020-S221 - 2020 SV5 - see above
Grabbed MPEC 2020-S222 - 2020 SW5 - see above
Grabbed MPEC 2020-S223 - 2020 SX5 - see above
Grabbed MPEC 2020-S224 - 2020 SY5 - see above