Contents  on 24 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 24 September '20

The MPC's NEO Confirmation Page has 53 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 53 objects listed. Of these, 32 were "one nighters." So far The Tracking News has counted a total of 74 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 24 September '20

Minor Planet Electronic Circulars

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


<< DOU on 24 September '20 >>  MPEC 2020-S184 - "12:01 UT" - Daily Orbit Update


MPEC 2020-S183 - "09:06 UT" - 2020 SM4


MPEC 2020-S182 - "09:04 UT" - 2020 SL4


MPEC 2020-S181 - "09:03 UT" - 2020 SK4


MPEC 2020-S180 - "09:02 UT" - 2020 SJ4


MPEC 2020-S179 - "06:44 UT" - 2020 SH4


MPEC 2020-S178 - "06:43 UT" - 2020 SG4


MPEC 2020-S177 - "06:41 UT" - 2020 SF4


MPEC 2020-S176 - "06:40 UT" - 2020 SE4


MPEC 2020-S175 - "06:39 UT" - 2020 SD4


MPEC 2020-S174 - "01:59 UT" - 2020 SC4


MPEC 2020-S173 - "01:57 UT" - 2020 SB4


MPEC 2020-S172 - "00:06 UT" - 2020 SZ3


MPEC 2020-S171 - "00:02 UT" - 2020 SY3

Observers  on 24 September '20

A total of 41 observers appear in today's MPECs.

CodeObserver / observatory
G18ALMO Obs., 1 in MPEC 2020-S184 -- 2020 SW
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPEC 2020-S184 -- 2020 SY1, 2020 RS2, 2020 RO3, 2020 RM1, 2020 RF1, 2020 QP5, 2020 PJ3, 2020 MM, 2017 ST20
T05ATLAS Haleakala in Hawaii, 7 in MPEC 2020-S184 -- 2020 SW, 2020 SN, 2020 QM4, 2020 PD1, 2020 OA2, 2016 ED85, 2013 PY6
T08ATLAS Mauna Loa in Hawaii, 9 in MPEC 2020-S184 -- 2020 RF, 2020 QU6, 2020 PM7, 2020 OX6, 2013 TV144, 2010 JV153, 2008 SW150, 2006 UD63, 2006 HB
C77Bernezzo Obs. in Italy, 1 in MPEC 2020-S184 -- 2020 SW
160Castelmartini Obs. in Italy, 6 in MPEC 2020-S184 -- 2020 RF, 2020 RE1, 2016 ED85, 2013 PY6, 2012 DP8, 2007 VX137
703Catalina Sky Survey (CSS) in Arizona, 10 in MPEC 2020-S184 -- 2020 RK2, 2020 RJ3, 2020 QM4, 2020 PM7, 2020 PD1, 2020 PC5, 2016 ED85, 2013 PY6, 2007 VX137, 2000 PQ27
470Ceccano Obs. in Italy, 1 in MPEC 2020-S184 -- 2020 SW
970Chelmsford Obs. in England, 1 in MPEC 2020-S184 -- 2020 SW
K87Dettelbach Vineyard Obs. in Germany, 6 in MPEC 2020-S184 -- 2020 SW, 2020 SN, 2020 SB, 2020 SA3, 2020 RJ3, 2007 VX137
N31Eden Obs., 2 in MPEC 2020-S184 -- 2020 PX1, 2020 PD1
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2020-S184 -- 2020 SW
K88GINOP-KHK in Hungary, 2 in MPEC 2020-S184 -- 2020 QM4, 2016 ED85
J95Great Shefford Obs. in England, 1 in MPEC 2020-S184 -- 2020 SW
511Haute Provence Obs. in Germany, 1 in MPEC 2020-S184 -- 2020 SW
Q622Marian Urbanik in Slovakia via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-S184 -- 2020 SW
C401program code 1 via Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-S184 -- 2020 PM7
K38M57 Obs. in Italy, 2 in MPEC 2020-S184 -- 2020 SW, 2020 SM1
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2020-S171, 2020-S172 & 2020-S181 -- 2020 SZ3, 2020 SY3, 2020 SK4
1813program code 3 via Makes Obs. in France, 1 in MPEC 2020-S184 -- 2020 SW
G96Mt. Lemmon Survey (MLS) in Arizona, 35 in MPECs 2020-S171, 2020-S172, 2020-S173, 2020-S174, 2020-S175, 2020-S178, 2020-S179, 2020-S181, 2020-S182, 2020-S183 & 2020-S184 -- 2020 SZ3, 2020 SY3, 2020 SM4, 2020 SL4, 2020 SK4, 2020 SH4, 2020 SG4, 2020 SF, 2020 SD4, 2020 SC4, 2020 SB4, 2020 SB, 2020 RZ9, 2020 RS3, 2020 RN6, 2020 RH7, 2020 RD1, 2020 RA3, 2020 QQ5, 2020 QE4, 2020 PY3, 2020 PV3, 2020 PR3, 2020 OR, 2020 OC8, 2020 LB3, 2019 GQ3, 2018 TS5, 2018 EJ2, 2016 TH56, 2016 TF93, 2014 QL433, 2011 BF59, 2009 RU1, 2007 SW2
J69North Obs. in England, 1 in MPEC 2020-S184 -- 2020 SW
Z80Northolt Branch Obs. in England, 1 in MPEC 2020-S184 -- 2020 SW
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2020-S184 -- 2020 SW
F51Pan-STARRS 1 (PS1) in Hawaii, 17 in MPECs 2020-S171, 2020-S172, 2020-S173, 2020-S174, 2020-S177, 2020-S178, 2020-S179, 2020-S180, 2020-S182 & 2020-S184 -- 2020 SZ3, 2020 SY3, 2020 SL4, 2020 SJ4, 2020 SH4, 2020 SG4, 2020 SF4, 2020 SC4, 2020 SB4, 2020 RY4, 2020 RX7, 2020 QY4, 2020 PD1, 2020 MF2, 2016 VG3, 2014 SG143, 2013 VQ4
F52Pan-STARRS 2 (PS2) in Hawaii, 16 in MPECs 2020-S175, 2020-S178, 2020-S180, 2020-S182 & 2020-S184 -- 2020 SL4, 2020 SJ4, 2020 SG4, 2020 SD4, 2020 RZ3, 2020 RT3, 2020 RQ1, 2020 RL2, 2020 RK6, 2020 RK2, 2020 RB, 2020 OX6, 2020 AK, 2012 HD20, 2009 UE2, 2004 RF84
K63Pascoli Obs. in Italy, 1 in MPEC 2020-S184 -- 2020 SW
K19PASTIS Obs. in France, 1 in MPEC 2020-S184 -- 2020 SW
A48Povegliano Veronese Obs. in Italy, 3 in MPEC 2020-S184 -- 2020 SW, 2020 SN, 2020 SA3
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2020-S184 -- 2020 OA2
L18QOS Obs., 5 in MPEC 2020-S184 -- 2020 SW, 2020 SN, 2016 NV38, 2016 ED85, 2013 UX14
H36Sandlot Obs. in Kansas, 6 in MPEC 2020-S184 -- 2020 SW, 2020 SO, 2020 PP, 2020 LR, 2019 SV4, 2016 FY14
C95SATINO-1 in France, 1 in MPEC 2020-S184 -- 2018 RV3
K14Sencelles Obs. in Spain, 1 in MPEC 2020-S184 -- 2020 RE1
G40[program code "[" (25) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-S184 -- 2001 SG286
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2020-S173 -- 2020 SB4
I52Steward Obs. Mt. Lemmon Station in Arizona, 48 in MPECs 2020-S171, 2020-S172, 2020-S173, 2020-S174, 2020-S175, 2020-S177, 2020-S178, 2020-S179, 2020-S180, 2020-S181, 2020-S182, 2020-S183 & 2020-S184 -- 2020 SZ3, 2020 SY3, 2020 SR, 2020 SQ3, 2020 SP3, 2020 SO3, 2020 SO1, 2020 SN, 2020 SM4, 2020 SM1, 2020 SL4, 2020 SK4, 2020 SK2, 2020 SJ4, 2020 SH4, 2020 SH2, 2020 SG4, 2020 SG, 2020 SF4, 2020 SE3, 2020 SD4, 2020 SD3, 2020 SC4, 2020 SB4, 2020 SB, 2020 SA3, 2020 SA, 2020 RZ3, 2020 RZ, 2020 RX8, 2020 RW7, 2020 RU7, 2020 RS4, 2020 RR7, 2020 RR, 2020 RO1, 2020 RK7, 2020 RE1, 2020 RD7, 2020 RD1, 2020 RC7, 2020 RC, 2020 QP6, 2020 QO5, 2020 QK6, 2020 OK7, 2020 NQ1, 2007 UY1
A98Taurus-1 Obs. in Belarus, 1 in MPEC 2020-S184 -- 2001 SG286
L01Visnjan Obs. in Croatia, 3 in MPECs 2020-S173, 2020-S174 & 2020-S177 -- 2020 SF4, 2020 SC4, 2020 SB4
C51WISE in Earth polar orbit, 2 in MPECs 2020-S176 & 2020-S184 -- 2020 SE4, 505657
I41Zwicky Transient Facility in southern California, 1 in MPEC 2020-S184 -- 2019 AQ3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 September '20

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2330 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 SK4JPL Sentry17002055-2119301.0108523e-05-7.94-8.750JPL: Computed at 04:10 today Pacific time based on 18 observations spanning 1.9591 days (2020-Sep-22.31549 to 2020-Sep-24.274562). Diameter approximately 0.003 km. from weighted mean H=30.33.
NEODyS17002067-21181211.31e-05-7.84-8.780NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2020-09-22.316 to 2020-09-24.275."
2020 SO1JPL Sentry17002101-210117.268e-07-7.55-7.550JPL: Computed at 09:22 today Pacific time based on 81 observations spanning 7.0350 days (2020-Sep-17.40029 to 2020-Sep-24.435278). Diameter approximately 0.013 km. from weighted mean H=27.06.
NEODyS1700210111.9e-08-9.14-9.140NEODyS: "Based on 81 optical observations (of which 0 are rejected as outliers) from 2020-09-17.401 to 2020-09-24.436."
2020 SWNEODyS1804R E M O V E D-
JPL Sentry1700R E M O V E DJPL: Risk listing removed at 1631 UTC today
2009 FZ4JPL Sentry17002021-21163962.3679968e-06-5.17-5.890JPL: Computed at 22:33 April 7th of 2017 Pacific time based on 11 observations spanning .59999 days (2009-Mar-19.36974 to 2009-Mar-19.96973). Diameter approximately 0.031 km. from weighted mean H=25.21.
2001 SD286JPL Sentry17002080-208015.738e-08-7.41-7.410JPL: Computed at 18:38 April 12th of 2017 Pacific time based on 18 observations spanning 5.1872 days (2001-Sep-24.21958 to 2001-Sep-29.40682). Diameter approximately 0.030 km. from weighted mean H=25.24.

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 24 September '20

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

1804Noted that NEODyS has posted 2020 SK4 as an impact risk - see above
Noted that NEODyS has removed 2020 SW as an impact risk - see above
1700Noted that JPL Sentry has updated its 2001 SD286 risk assessment - see above
Noted that JPL Sentry has updated its 2009 FZ4 risk assessment - see above
Noted that JPL Sentry has posted 2020 SK4 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 SW as an impact risk - see above
Grabbed MPEC 2020-S175 - 2020 SD4 - see above
Grabbed MPEC 2020-S176 - 2020 SE4 - see above
Grabbed MPEC 2020-S177 - 2020 SF4 - see above
Grabbed MPEC 2020-S178 - 2020 SG4 - see above
Grabbed MPEC 2020-S179 - 2020 SH4 - see above
Grabbed MPEC 2020-S180 - 2020 SJ4 - see above
Grabbed MPEC 2020-S181 - 2020 SK4 - see above
Grabbed MPEC 2020-S182 - 2020 SL4 - see above
Grabbed MPEC 2020-S183 - 2020 SM4 - see above
Grabbed MPEC 2020-S184 - Daily Orbit Update - see above
0500Grabbed MPEC 2020-S173 - 2020 SB4 - see above
Grabbed MPEC 2020-S174 - 2020 SC4 - see above
0008Grabbed MPEC 2020-S171 - 2020 SY3 - see above
Grabbed MPEC 2020-S172 - 2020 SZ3 - see above