Contents  on 17 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 17 September '20

The MPC's NEO Confirmation Page has 136 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 136 objects listed. Of these, 70 were "one nighters." So far The Tracking News has counted a total of 168 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 17 September '20

Minor Planet Electronic Circulars

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


MPEC 2020-S54 - "20:22 UT" - 2020 RT8


MPEC 2020-S53 - "15:10 UT" - 2020 RS8


MPEC 2020-S52 - "14:37 UT" - 2020 RR8


<< DOU on 17 September '20 >>  MPEC 2020-S51 - "12:06 UT" - Daily Orbit Update


MPEC 2020-S50 - "10:46 UT" - 2020 RQ8


MPEC 2020-S49 - "10:44 UT" - 2020 QT7


MPEC 2020-S48 - "00:44 UT" - 2020 RF8


MPEC 2020-S47 - "00:42 UT" - 2020 RE8


MPEC 2020-S46 - "00:42 UT" - 2020 RD8


MPEC 2020-S45 - "00:41 UT" - 2020 RC8


MPEC 2020-S44 - "00:36 UT" - 2020 RB8


MPEC 2020-S43 - "00:35 UT" - 2020 RA8


MPEC 2020-S42 - "00:34 UT" - 2020 RZ7


MPEC 2020-S41 - "00:31 UT" - 2020 RY7


MPEC 2020-S40 - "00:29 UT" - 2020 SA


MPEC 2020-S39 - "00:28 UT" - 2020 RX7

Observers  on 17 September '20

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 4 in MPECs 2020-S42, 2020-S51, 2020-S52 & 2020-S53 -- 2020 RZ7, 2020 RW6, 2020 RS8, 2020 RR8
T05ATLAS Haleakala in Hawaii, 4 in MPEC 2020-S51 -- 2020 RW6, 2020 RQ1, 2020 RH3, 2012 DP8
T08ATLAS Mauna Loa in Hawaii, 17 in MPEC 2020-S51 -- 2020 RW6, 2020 RK2, 2020 RH6, 2020 RH3, 2020 RE1, 2020 RD5, 2020 QD, 2020 PR3, 2020 PM7, 2020 OC8, 2020 LB3, 2018 RV3, 2016 NV38, 2013 TV144, 2007 VX137, 2006 SS19, 2006 HB
160Castelmartini Obs. in Italy, 5 in MPEC 2020-S51 -- 2020 RE, 2020 LB3, 2018 RV3, 2014 QJ33, 2004 QD3
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2020-S51 -- 2020 RQ1, 2020 OG4, 2017 TF2, 2004 RF84, 2000 PQ27
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 8 in MPECs 2020-S39, 2020-S42, 2020-S43, 2020-S44, 2020-S45, 2020-S49, 2020-S50 & 2020-S53 -- 2020 RZ7, 2020 RX7, 2020 RS8, 2020 RQ8, 2020 RC8, 2020 RB8, 2020 RA8, 2020 QT7
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2020-S51 -- 2020 RR
734Farpoint Obs. in Kansas, 1 in MPEC 2020-S51 -- 2020 PX1
K83Forti Obs., 2 in MPEC 2020-S51 -- 2020 RZ6, 2020 RA6
K78Iota Scorpii Obs., 1 in MPEC 2020-S51 -- 2020 RA6
568^R. Wainscoat on Mauna Kea in Hawaii, 7 in MPECs 2020-S41, 2020-S42, 2020-S43, 2020-S45, 2020-S48, 2020-S53 & 2020-S54 -- 2020 RZ7, 2020 RY7, 2020 RT8, 2020 RS8, 2020 RF8, 2020 RC8, 2020 RA8
711McDonald Obs. in Texas, 5 in MPECs 2020-S41, 2020-S46, 2020-S49, 2020-S52 & 2020-S53 -- 2020 RY7, 2020 RS8, 2020 RR8, 2020 RD8, 2020 QT7
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2020-S39, 2020-S40, 2020-S47, 2020-S50, 2020-S51 & 2020-S54 -- 2020 SA, 2020 RX7, 2020 RT8, 2020 RQ8, 2020 RG, 2020 RE8, 2020 PC7, 2020 HP8, 2015 PZ228
K74Muensterschwarzach Obs. in Germany, 1 in MPEC 2020-S51 -- 2014 QJ33
J69North Obs. in England, 3 in MPEC 2020-S51 -- 2020 RF6, 2020 RA7, 2020 RA6
Z80Northolt Branch Obs. in England, 3 in MPEC 2020-S51 -- 2020 RA6, 2014 QJ33, 2013 PY6
F51Pan-STARRS 1 (PS1) in Hawaii, 37 in MPECs 2020-S39, 2020-S41, 2020-S42, 2020-S43, 2020-S44, 2020-S45, 2020-S46, 2020-S47, 2020-S48, 2020-S49, 2020-S50, 2020-S51, 2020-S53 & 2020-S54 -- 2020 RZ7, 2020 RY7, 2020 RX7, 2020 RT8, 2020 RT2, 2020 RS8, 2020 RQ8, 2020 RQ7, 2020 RP6, 2020 RG5, 2020 RF8, 2020 RF7, 2020 RE8, 2020 RD8, 2020 RC8, 2020 RB8, 2020 RA8, 2020 QT7, 2020 QR7, 2020 QR6, 2020 QP3, 2020 PM4, 2020 PC5, 2020 OL5, 2020 MD2, 2020 MC4, 2020 LE2, 2019 GG20, 2018 TS5, 2017 TF2, 2015 WA1, 2015 BF4, 2011 UT20, 2011 CG2, 2010 SC41, 2008 EO6, 2007 VX137
F52Pan-STARRS 2 (PS2) in Hawaii, 20 in MPECs 2020-S40, 2020-S41, 2020-S43, 2020-S50, 2020-S51, 2020-S52 & 2020-S54 -- 2020 SA, 2020 RY7, 2020 RV2, 2020 RT8, 2020 RR8, 2020 RQ8, 2020 RP4, 2020 RK7, 2020 RK2, 2020 RJ3, 2020 RH7, 2020 RG6, 2020 RA8, 2020 QE4, 2020 PR3, 2020 OA4, 2019 SV4, 2016 RY40, 2011 BF59, 2007 SW2
122Pises Obs. in France, 7 in MPEC 2020-S51 -- 2020 PM7, 2020 PD1, 2020 PC5, 2020 OC8, 2020 OA2, 2020 MP, 2004 QD17
L18QOS Obs., 6 in MPEC 2020-S51 -- 2020 RZ6, 2020 RW6, 2020 RF, 2016 NV38, 2014 QJ33, 2012 DP8
L04ROASTERR-1 in Romania, 3 in MPEC 2020-S51 -- 2020 RQ1, 2020 RE1, 2020 RA6
C95SATINO-1 in France, 1 in MPEC 2020-S51 -- 2001 SG286
W88*program code "*" (19) via Slooh.com Chile Obs. in Chile, 2 in MPEC 2020-S51 -- 2020 RE1, 2020 QU6
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2020-S50 -- 2020 RQ8
I52Steward Obs. Mt. Lemmon Station in Arizona, 13 in MPECs 2020-S47, 2020-S50 & 2020-S51 -- 2020 RX6, 2020 RR3, 2020 RQ8, 2020 RH6, 2020 RG6, 2020 RF, 2020 RE8, 2020 RD7, 2020 RB7, 2020 RA7, 2019 SV4, 2017 TF2, 2012 US9
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-S51 -- 2020 RF5
L01Visnjan Obs. in Croatia, 5 in MPECs 2020-S40, 2020-S51 & 2020-S52 -- 2020 SA, 2020 RY7, 2020 RX7, 2020 RR8, 2018 RN4
C51WISE in Earth polar orbit, 1 in MPEC 2020-S51 -- 2020 LH1
I41Zwicky Transient Facility (ZTF) in southern California, 2 in MPEC 2020-S51 -- 2020 RK2, 2020 KZ5
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 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 RH7JPL Sentry16302092-211668.541e-10-6.62-7.240JPL: Computed at 07:32 today Pacific time based on 25 observations spanning 2.1171 days (2020-Sep-14.368008 to 2020-Sep-16.485118). Diameter approximately 0.300 km. from weighted mean H=20.27.
2020 RB7JPL Sentry16302105-211782.43884e-06-6.77-7.160JPL: Computed at 07:51 today Pacific time based on 33 observations spanning 1.7408 days (2020-Sep-15.405818 to 2020-Sep-17.14657). Diameter approximately 0.012 km. from weighted mean H=27.31.
NEODyS16302102-2117182.52e-06-6.78-7.250NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2020-09-15.407 to 2020-09-17.147."
2020 RZ6JPL Sentry16302071-209374.891428e-06-6.29-6.400JPL: Computed at 07:50 today Pacific time based on 51 observations spanning 1.5122 days (2020-Sep-15.366103 to 2020-Sep-16.87833). Diameter approximately 0.015 km. from weighted mean H=26.75.
NEODyS16302071-2112101.41e-06-6.83-6.940NEODyS: "Based on 51 optical observations (of which 0 are rejected as outliers) from 2020-09-15.367 to 2020-09-16.879."
2020 RF5JPL Sentry1630R E M O V E DJPL: Risk listing removed at 1438 UTC today
2019 SJJPL Sentry16302082-2119160.00044626773-4.89-5.210JPL: Computed at 09:01 Aug. 22nd Pacific time based on 45 observations spanning 16.805 days (2019-Sep-18.358702 to 2019-Oct-05.16334). Diameter approximately 0.010 km. from weighted mean H=27.59.
2014 GN1JPL Sentry16302061-206112.074e-05-4.13-4.130JPL: Computed at 07:29 April 9th of 2017 Pacific time based on 90 observations spanning 12.154 days (2014-Mar-25.171471 to 2014-Apr-06.32522). Diameter approximately 0.041 km. from weighted mean H=24.59.

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 17 September '20

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

2110Grabbed MPEC 2020-S54 - 2020 RT8 - see above
1630Noted that JPL Sentry has updated its 2014 GN1 risk assessment - see above
Noted that JPL Sentry has updated its 2019 SJ risk assessment - see above
Noted that JPL Sentry has updated its 2020 RB7 risk assessment - see above
Noted that NEODyS has updated its 2020 RB7 risk assessment - see above
Noted that JPL Sentry has removed 2020 RF5 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 RH7 risk assessment - see above
Noted that JPL Sentry has updated its 2020 RZ6 risk assessment - see above
Noted that NEODyS has updated its 2020 RZ6 risk assessment - see above
Grabbed MPEC 2020-S49 - 2020 QT7 - see above
Grabbed MPEC 2020-S50 - 2020 RQ8 - see above
Grabbed MPEC 2020-S51 - Daily Orbit Update - see above
Grabbed MPEC 2020-S52 - 2020 RR8 - see above
Grabbed MPEC 2020-S53 - 2020 RS8 - see above
0110Grabbed MPEC 2020-S39 - 2020 RX7 - see above
Grabbed MPEC 2020-S40 - 2020 SA - see above
Grabbed MPEC 2020-S41 - 2020 RY7 - see above
Grabbed MPEC 2020-S42 - 2020 RZ7 - see above
Grabbed MPEC 2020-S43 - 2020 RA8 - see above
Grabbed MPEC 2020-S44 - 2020 RB8 - see above
Grabbed MPEC 2020-S45 - 2020 RC8 - see above
Grabbed MPEC 2020-S46 - 2020 RD8 - see above
Grabbed MPEC 2020-S47 - 2020 RE8 - see above
Grabbed MPEC 2020-S48 - 2020 RF8 - see above