Contents  on 16 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.

Radar Astrometry  on 16 September '20

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 1700 UTC when the database was dated 15 Sept.



Photometry and some astrometry is needed for upcoming radar targets. See Arecibo and Goldstone schedules.

NEOCP Activity  on 16 September '20

The MPC's NEO Confirmation Page has 120 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 120 objects listed. Of these, 54 were "one nighters." So far The Tracking News has counted a total of 172 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 16 September '20

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 38 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2020-S38 - "23:41 UT" - 2020 RW7


MPEC 2020-S37 - "23:04 UT" - 2020 RU7


MPEC 2020-S36 - "23:02 UT" - 2020 RT7


MPEC 2020-S35 - "23:01 UT" - 2020 RS7


MPEC 2020-S34 - "23:00 UT" - 2020 RR7


MPEC 2020-S33 - "21:46 UT" - Comet C/2020 R4 (ATLAS)


MPEC 2020-S32 - "20:47 UT" - 2018 RN4


MPEC 2020-S31 - "17:55 UT" - 2020 RQ7


MPEC 2020-S30 - "14:43 UT" - 2020 QR7


MPEC 2020-S29 - "14:00 UT" - 2020 RM7


MPEC 2020-S28 - "13:45 UT" - 2020 RL7


MPEC 2020-S27 - "13:43 UT" - 2020 RK7


MPEC 2020-S26 - "13:42 UT" - 2020 RJ7


MPEC 2020-S25 - "13:40 UT" - 2020 RH7


<< DOU on 16 September '20 >>  MPEC 2020-S24 - "12:06 UT" - Daily Orbit Update


MPEC 2020-S23 - "11:35 UT" - 2020 RF7


MPEC 2020-S22 - "11:09 UT" - 2020 RE7


MPEC 2020-S21 - "11:07 UT" - 2020 QQ7


MPEC 2020-S20 - "05:35 UT" - 2020 RD7


MPEC 2020-S19 - "03:48 UT" - 2020 RC7


MPEC 2020-S18 - "03:47 UT" - 2020 RB7


MPEC 2020-S17 - "03:45 UT" - 2020 RA7


MPEC 2020-S16 - "03:42 UT" - 2020 RZ6


MPEC 2020-S15 - "03:36 UT" - 2020 RY6


MPEC 2020-S14 - "03:35 UT" - 2020 RX6


MPEC 2020-S13 - "03:34 UT" - 2020 RW6


MPEC 2020-S12 - "03:31 UT" - 2020 RV6


MPEC 2020-S11 - "03:28 UT" - 2020 RU6


MPEC 2020-S10 - "02:53 UT" - 2020 RT6


MPEC 2020-S09 - "02:50 UT" - 2020 RS6


MPEC 2020-S08 - "02:48 UT" - 2020 RR6


MPEC 2020-S07 - "02:43 UT" - 2020 RQ6


MPEC 2020-S06 - "02:41 UT" - 2020 RP6


MPEC 2020-S05 - "00:53 UT" - 2020 RO6


MPEC 2020-S04 - "00:47 UT" - 2020 RN6


MPEC 2020-S03 - "00:46 UT" - 2020 RM6


MPEC 2020-S02 - "00:42 UT" - 2020 RL6


MPEC 2020-S01 - "00:41 UT" - 2020 RK6

Observers  on 16 September '20

A total of 48 observers appear in today's MPECs.

CodeObserver / observatory
A44Altschwendt Obs. in Austria, 4 in MPECs 2020-S01, 2020-S18, 2020-S34 & 2020-S38 -- 2020 RW7, 2020 RR7, 2020 RK6, 2020 RB7
E23Arcadia Obs. in New South Wales, 4 in MPECs 2020-S33, 2020-S36, 2020-S37 & 2020-S38 -- 2020 RW7, 2020 RU7, 2020 RT7, C/2020 R4
251Arecibo in Puerto Rico, 1 in radar -- 2018 EB
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPECs 2020-S09, 2020-S16, 2020-S20, 2020-S23, 2020-S24, 2020-S26, 2020-S34 & 2020-S37 -- 2020 RZ6, 2020 RU7, 2020 RS6, 2020 RR7, 2020 RQ6, 2020 RN6, 2020 RJ7, 2020 RF7, 2020 RD7, 2020 RC7, 2020 RB7, 2020 RA7
T05ATLAS Haleakala in Hawaii, 14 in MPECs 2020-S04, 2020-S13, 2020-S16, 2020-S17 & 2020-S24 -- 2020 RZ6, 2020 RW6, 2020 RQ1, 2020 RN6, 2020 RF, 2020 RA7, 2020 RA6, 2020 PD1, 2020 PC5, 2020 OA2, 2020 MC4, 2016 ED85, 2011 GO27, 2004 RF84
T08ATLAS Mauna Loa in Hawaii, 18 in MPECs 2020-S24, 2020-S33, 2020-S37 & 2020-S38 -- 2020 RW7, 2020 RU7, 2020 RO, 2020 RF6, C/2020 R4, 2020 QU6, 2020 QM1, 2020 QD, 2020 PM7, 2020 ME5, 2013 UX14, 2013 TV144, 2012 SH32, 2010 JV153, 2009 BB, 2008 SW150, 2006 HB, 2005 QS10
Z841program code 1 via Calar Alto Schmidt in Spain, 3 in MPECs 2020-S16, 2020-S17 & 2020-S18 -- 2020 RZ6, 2020 RB7, 2020 RA7
Z844program code 4 via Calar Alto Schmidt in Spain, 1 in MPEC 2020-S24 -- 2020 RC7
703Catalina Sky Survey (CSS) in Arizona, 9 in MPECs 2020-S11, 2020-S13, 2020-S24 & 2020-S33 -- 2020 RW6, 2020 RU6, 2020 RE1, C/2020 R4, 2020 OC8, 2013 UX14, 2006 UD63, 2006 HB, 2004 QD3
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 13 in MPECs 2020-S05, 2020-S09, 2020-S10, 2020-S15, 2020-S24, 2020-S25, 2020-S26, 2020-S27, 2020-S28, 2020-S29, 2020-S30 & 2020-S31 -- 2020 RY6, 2020 RT6, 2020 RS6, 2020 RQ7, 2020 RO6, 2020 RM7, 2020 RL7, 2020 RK7, 2020 RJ7, 2020 RH7, 2020 QR7, 2020 PW3, 2010 TU5
Z99Clixby Obs. in England, 2 in MPECs 2020-S24 & 2020-S33 -- 2020 RW3, C/2020 R4
106Crni Vrh Obs. in Slovenia, 2 in MPECs 2020-S24 & 2020-S33 -- 2020 RW6, C/2020 R4
958Dax Obs. in France, 4 in MPECs 2020-S13, 2020-S16, 2020-S17 & 2020-S37 -- 2020 RZ6, 2020 RW6, 2020 RU7, 2020 RA7
K87Dettelbach Vineyard Obs. in Germany, 25 in MPECs 2020-S24 & 2020-S33 -- 2020 RW, 2020 RT4, 2020 RT1, 2020 RR, 2020 RQ1, 2020 RF6, 2020 RF, 2020 RE1, 2020 RE, 2020 RA6, C/2020 R4, 2020 QM4, 2020 QK6, 2020 PM7, 2020 OW3, 2020 OA2, 2020 ML3, 2020 LB3, 2020 LA2, 2020 HP8, 2018 RV3, 2014 QJ33, 2013 PY6, 2006 HB, 2004 QD3
N31Eden Obs., 3 in MPEC 2020-S24 -- 2020 QD, 2006 HB, 2005 QS10
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2020-S17 & 2020-S33 -- 2020 RA7, C/2020 R4
K83Forti Obs., 1 in MPEC 2020-S37 -- 2020 RU7
X31Galilei Obs., 1 in MPEC 2020-S38 -- 2020 RW7
E94Gisborne Obs. in New Zealand, 1 in MPEC 2020-S33 -- C/2020 R4
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2018 EB
J95Great Shefford Obs. in England, 3 in MPECs 2020-S06, 2020-S16 & 2020-S17 -- 2020 RZ6, 2020 RP6, 2020 RA7
A17Guidestar Obs. in Germany, 1 in MPEC 2020-S24 -- 2004 RF84
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-S33 -- C/2020 R4
Q62{Nirmal Paul in India via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-S33 -- C/2020 R4
2461program code 1 via KLENOT in the Czech Republic, 17 in MPECs 2020-S01, 2020-S04, 2020-S06, 2020-S07, 2020-S13, 2020-S14, 2020-S16, 2020-S17, 2020-S18, 2020-S19, 2020-S20, 2020-S24, 2020-S33, 2020-S34, 2020-S35, 2020-S36 & 2020-S37 -- 2020 RZ6, 2020 RX6, 2020 RW6, 2020 RU7, 2020 RT7, 2020 RS7, 2020 RR7, 2020 RQ6, 2020 RP6, 2020 RN6, 2020 RK6, 2020 RD7, 2020 RC7, 2020 RB7, 2020 RA7, 2020 RA6, C/2020 R4
L52MASTER Tavrida, 1 in MPEC 2020-S24 -- 2007 VX137
568^R. Wainscoat on Mauna Kea in Hawaii, 12 in MPECs 2020-S03, 2020-S08, 2020-S09, 2020-S10, 2020-S12, 2020-S15, 2020-S21, 2020-S27, 2020-S28, 2020-S30, 2020-S31 & 2020-S33 -- 2020 RY6, 2020 RV6, 2020 RT6, 2020 RS6, 2020 RR6, 2020 RQ7, 2020 RM6, 2020 RL7, 2020 RK7, C/2020 R4, 2020 QR7, 2020 QQ7
711McDonald Obs. in Texas, 4 in MPECs 2020-S25, 2020-S29, 2020-S33 & 2020-S37 -- 2020 RU7, 2020 RM7, 2020 RH7, C/2020 R4
V01Mountainville Obs. in Utah, 2 in MPECs 2020-S24 & 2020-S33 -- 2020 RA6, C/2020 R4
W73MPC code W73, 1 in MPEC 2020-S24 -- 2013 UX14
G96Mt. Lemmon Survey (MLS) in Arizona, 39 in MPECs 2020-S01, 2020-S02, 2020-S06, 2020-S07, 2020-S11, 2020-S14, 2020-S19, 2020-S23, 2020-S24, 2020-S25, 2020-S27, 2020-S29 & 2020-S35 -- 2020 RZ3, 2020 RY3, 2020 RX6, 2020 RV2, 2020 RU6, 2020 RS7, 2020 RS4, 2020 RQ6, 2020 RP6, 2020 RP4, 2020 RO1, 2020 RM7, 2020 RL6, 2020 RK7, 2020 RK6, 2020 RK1, 2020 RJ3, 2020 RH7, 2020 RG3, 2020 RF7, 2020 RF4, 2020 RC7, 2020 RA3, 2020 RA, 2020 QE4, 2020 QD2, 2020 PY3, 2020 PV3, 2020 PO1, 2020 LB3, 2020 DB5, 2018 TS5, 2018 PP10, 2017 SG14, 2014 QL433, 2011 FY2, 2011 BF59, 2006 SS19, 2006 HB
0895N.V. Maigurova via Nikolaev Obs. in Ukraine, 3 in MPEC 2020-S24 -- 53435, 500094, 420302
F51Pan-STARRS 1 (PS1) in Hawaii, 41 in MPECs 2020-S01, 2020-S02, 2020-S03, 2020-S05, 2020-S07, 2020-S08, 2020-S09, 2020-S10, 2020-S12, 2020-S18, 2020-S20, 2020-S21, 2020-S22, 2020-S23, 2020-S24, 2020-S25, 2020-S28, 2020-S30, 2020-S31, 2020-S32 & 2020-S33 -- 2020 RZ5, 2020 RV6, 2020 RT6, 2020 RS6, 2020 RR6, 2020 RQ7, 2020 RQ6, 2020 RO6, 2020 RM6, 2020 RM3, 2020 RL7, 2020 RL6, 2020 RK6, 2020 RH7, 2020 RF7, 2020 RE7, 2020 RE3, 2020 RD7, 2020 RC4, 2020 RB7, C/2020 R4, 2020 QR7, 2020 QQ7, 2020 QG6, 2020 QG4, 2020 QA5, 2020 PX3, 2020 OA2, 2020 OA1, 2020 ME5, 2020 LJ2, 2019 GG20, 2018 TS5, 2018 RN4, 2017 SV20, 2017 RT1, 2017 RD15, 2016 FG15, 2015 NJ24, 2011 TC4, 2008 EO6
F52Pan-STARRS 2 (PS2) in Hawaii, 37 in MPECs 2020-S04, 2020-S05, 2020-S06, 2020-S10, 2020-S12, 2020-S14, 2020-S15, 2020-S21, 2020-S22, 2020-S23, 2020-S24, 2020-S25, 2020-S26, 2020-S27, 2020-S29, 2020-S32, 2020-S34 & 2020-S36 -- 2020 RY6, 2020 RX6, 2020 RV6, 2020 RV5, 2020 RT7, 2020 RT6, 2020 RS3, 2020 RR7, 2020 RQ3, 2020 RP6, 2020 RP4, 2020 RO6, 2020 RO1, 2020 RN6, 2020 RN, 2020 RM7, 2020 RK7, 2020 RJ7, 2020 RH7, 2020 RF7, 2020 RE7, 2020 QQ7, 2020 PK7, 2020 OX6, 2020 MP, 2020 MD2, 2020 LJ2, 2020 LE2, 2020 DB5, 2018 RN4, 2018 PP10, 2016 RU, 2014 QL390, 2014 LQ26, 2013 VZ9, 2011 FY2, 1999 SK10
B49Paus Obs. in Spain, 1 in MPEC 2020-S33 -- C/2020 R4
D29Purple Mtn. Obs. Xuyi Station in China, 8 in MPECs 2020-S21 & 2020-S24 -- 2020 QQ7, 2020 ML3, 2016 NV38, 2016 HL, 2016 ED85, 2013 PY6, 2009 FY29, 2004 RF84
L18QOS Obs., 1 in MPEC 2020-S13 -- 2020 RW6
L04ROASTERR-1 in Romania, 1 in MPEC 2020-S24 -- 2020 RF
K61Rokycany Obs. in the Czech Republic, 2 in MPECs 2020-S13 & 2020-S16 -- 2020 RZ6, 2020 RW6
L07Salvatore di Giacomo Obs., 1 in MPEC 2020-S33 -- C/2020 R4
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2020-S35 & 2020-S37 -- 2020 RU7, 2020 RS7
H36Sandlot Obs. in Kansas, 2 in MPECs 2020-S16 & 2020-S33 -- 2020 RZ6, C/2020 R4
C95SATINO-1 in France, 3 in MPECs 2020-S24, 2020-S33 & 2020-S34 -- 2020 RR7, C/2020 R4, 2007 TG8
204Schiaparelli Obs. in Italy, 1 in MPEC 2020-S33 -- C/2020 R4
I93St. Pardon de Conques Obs. in France, 15 in MPECs 2020-S04, 2020-S06, 2020-S07, 2020-S13, 2020-S14, 2020-S16, 2020-S17, 2020-S18, 2020-S19, 2020-S20, 2020-S33, 2020-S34, 2020-S35, 2020-S36 & 2020-S37 -- 2020 RZ6, 2020 RX6, 2020 RW6, 2020 RU7, 2020 RT7, 2020 RS7, 2020 RR7, 2020 RQ6, 2020 RP6, 2020 RN6, 2020 RD7, 2020 RC7, 2020 RB7, 2020 RA7, C/2020 R4
I52Steward Obs. Mt. Lemmon Station in Arizona, 48 in MPECs 2020-S01, 2020-S07, 2020-S11, 2020-S14, 2020-S19, 2020-S20, 2020-S24, 2020-S29, 2020-S35, 2020-S36, 2020-S37 & 2020-S38 -- 2020 RZ, 2020 RY1, 2020 RX6, 2020 RX2, 2020 RW7, 2020 RV2, 2020 RU7, 2020 RU6, 2020 RT7, 2020 RT4, 2020 RT3, 2020 RT1, 2020 RS7, 2020 RS3, 2020 RR, 2020 RQ6, 2020 RQ3, 2020 RQ2, 2020 RQ1, 2020 RO1, 2020 RN, 2020 RM7, 2020 RL2, 2020 RK6, 2020 RK2, 2020 RJ3, 2020 RG1, 2020 RG, 2020 RF4, 2020 RE1, 2020 RD7, 2020 RD5, 2020 RD2, 2020 RC7, 2020 RC, 2020 RB7, 2020 RB, 2020 RA4, 2020 RA2, 2020 QR6, 2020 QP3, 2020 QO4, 2020 QM1, 2020 QL7, 2020 QJ6, 2020 QG3, 2020 OK7, 2020 OC7
Z08Telescope Live, 1 in MPEC 2020-S33 -- C/2020 R4
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 9 in MPECs 2020-S24 & 2020-S29 -- 2020 RR4, 2020 RO2, 2020 RM7, 2020 RJ2, 2020 RE4, 2020 QZ4, 2020 QR5, 2020 QN1, 2020 QF6
L01Visnjan Obs. in Croatia, 19 in MPECs 2020-S01, 2020-S02, 2020-S06, 2020-S07, 2020-S11, 2020-S13, 2020-S14, 2020-S16, 2020-S17, 2020-S18, 2020-S19, 2020-S20, 2020-S24, 2020-S26, 2020-S33, 2020-S34, 2020-S35, 2020-S36 & 2020-S37 -- 2020 RZ6, 2020 RX6, 2020 RW6, 2020 RU7, 2020 RU6, 2020 RT7, 2020 RS7, 2020 RR7, 2020 RQ6, 2020 RP6, 2020 RN6, 2020 RL6, 2020 RK6, 2020 RJ7, 2020 RD7, 2020 RC7, 2020 RB7, 2020 RA7, C/2020 R4
I41Zwicky Transient Facility (ZTF) in southern California, 2 in MPEC 2020-S24 -- 2020 PD1, 2007 VX137
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 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 Sentry17002027-2120566.86624e-08-4.21-4.860JPL: Computed at 08:33 today Pacific time based on 21 observations spanning 1.9825 days (2020-Sep-14.368008 to 2020-Sep-16.35054). Diameter approximately 0.300 km. from weighted mean H=20.26.
NEODyS17002027-2118331.11e-08-5.21-5.890NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2020-09-14.369 to 2020-09-16.351."
2020 RB7JPL Sentry17002104-2117102.887314e-06-6.72-7.060JPL #2 for the day: Computed at 08:55 today Pacific time based on 29 observations spanning .77723 days (2020-Sep-15.405818 to 2020-Sep-16.18305). Diameter approximately 0.011 km. from weighted mean H=27.36.
NEODyS17002105-2117193.65e-06-6.64-7.040NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2020-09-15.407 to 2020-09-16.184."
2020 RZ6NEODyS17002062-2117161.77e-05-5.73-5.830NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2020-09-15.367 to 2020-09-16.097."
JPL Sentry06002071-209391.55694364e-05-5.76-6.080JPL: Computed at 22:00 Sept. 15th Pacific time based on 44 observations spanning .72971 days (2020-Sep-15.366103 to 2020-Sep-16.09581). Diameter approximately 0.015 km. from weighted mean H=26.71.
2020 RV6NEODyS17002075-208621.08e-09-8.97-9.240NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2020-09-12.363 to 2020-09-14.376."
JPL Sentry06002067-210687.3984e-09-8.13-8.700JPL: Computed at 21:42 Sept. 15th Pacific time based on 12 observations spanning 2.0125 days (2020-Sep-12.362493 to 2020-Sep-14.375034). Diameter approximately 0.038 km. from weighted mean H=24.71.
2020 RM6NEODyS17002065-211829.92e-08-7.05-7.050NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2020-09-10.315 to 2020-09-14.370."
2020 RR4JPL Sentry17002082-208213.667e-07-6.90-6.900JPL: Computed at 08:48 today Pacific time based on 17 observations spanning 6.0512 days (2020-Sep-09.45312 to 2020-Sep-15.504276). Diameter approximately 0.023 km. from weighted mean H=25.84.
NEODyS17002081-208221.19e-07-7.45-7.610NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2020-09-09.454 to 2020-09-15.505."
2020 RE4JPL Sentry17002115-212061.0649e-07-8.48-8.910JPL: Computed at 09:02 today Pacific time based on 16 observations spanning 5.1997 days (2020-Sep-10.17733 to 2020-Sep-15.377004). Diameter approximately 0.009 km. from weighted mean H=27.91.
NEODyS17002098-2118121.29e-07-8.36-8.970NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2020-09-10.178 to 2020-09-15.378."
2020 RO2JPL Sentry17002040-204017.297e-09-8.88-8.880JPL: Computed at 08:57 today Pacific time based on 16 observations spanning 6.0508 days (2020-Sep-09.335412 to 2020-Sep-15.386245). Diameter approximately 0.010 km. from weighted mean H=27.62.
2020 RJ2JPL Sentry17002061-2119310.00026798348-6.14-6.460JPL: Computed at 08:40 today Pacific time based on 24 observations spanning 5.2134 days (2020-Sep-10.20115 to 2020-Sep-15.414513). Diameter approximately 0.004 km. from weighted mean H=29.41.
NEODyS17002061-2118556.63e-05-6.76-7.130NEODyS: "Based on 27 optical observations (of which 3 are rejected as outliers) from 2020-09-10.202 to 2020-09-15.415."
2020 QR5JPL Sentry17002103-211961.21307e-06-7.42-7.550JPL: Computed at 08:37 today Pacific time based on 52 observations spanning 22.777 days (2020-Aug-23.629969 to 2020-Sep-15.40711). Diameter approximately 0.012 km. from weighted mean H=27.32.
NEODyS17002096-2118112.04e-07-8.23-8.390NEODyS: "Based on 52 optical observations (of which 0 are rejected as outliers) from 2020-08-23.631 to 2020-09-15.408."
2020 QN1JPL Sentry17002113-211318.436e-09-7.60-7.600JPL: Computed at 08:39 today Pacific time based on 42 observations spanning 45.962 days (2020-Jul-31.38815 to 2020-Sep-15.349676). Diameter approximately 0.079 km. from weighted mean H=23.17.
NEODyS17002099-211872.67e-07-6.06-6.210NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2020-07-31.389 to 2020-09-15.350."
2019 SE11JPL Sentry06002042-206444.0723e-09-8.36-8.710JPL: Computed at 06:58 Oct. 11th of 2019 Pacific time based on 8 observations spanning 1.0095 days (2019-Sep-21.21679 to 2019-Sep-22.22632). Diameter approximately 0.028 km. from weighted mean H=25.40.
2019 SCJPL Sentry06002051-205116.051e-06-6.00-6.000JPL: Computed at 08:22 Dec. 4th of 2019 Pacific time based on 76 observations spanning 13.708 days (2019-Sep-06.411436 to 2019-Sep-20.119139). Diameter approximately 0.012 km. from weighted mean H=27.22.
2000 SG344JPL Sentry06002069-21131010.00260144356-2.84-3.200JPL: Computed at 01:58 April 7th of 2017 Pacific time based on 31 observations spanning 507.40 days (1999-May-15.20482 to 2000-Oct-03.60723). Diameter approximately 0.037 km. from weighted mean H=24.79.

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 16 September '20

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

2358Grabbed MPEC 2020-S38 - 2020 RW7 - see above
2330Grabbed MPEC 2020-S34 - 2020 RR7 - see above
Grabbed MPEC 2020-S35 - 2020 RS7 - see above
Grabbed MPEC 2020-S36 - 2020 RT7 - see above
Grabbed MPEC 2020-S37 - 2020 RU7 - see above
2204Grabbed MPEC 2020-S32 - 2018 RN4 - see above
Grabbed MPEC 2020-S33 - Comet C/2020 R4 (ATLAS) - see above
1800Grabbed MPEC 2020-S31 - 2020 RQ7 - see above
1700Noted that JPL Sentry has updated its 2020 QN1 risk assessment - see above
Noted that NEODyS has updated its 2020 QN1 risk assessment - see above
Noted that JPL Sentry has updated its 2020 QR5 risk assessment - see above
Noted that NEODyS has updated its 2020 QR5 risk assessment - see above
Noted that JPL Sentry has updated its 2020 RB7 risk assessment - see above
Noted that NEODyS has posted 2020 RB7 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 RE4 risk assessment - see above
Noted that NEODyS has updated its 2020 RE4 risk assessment - see above
Noted that JPL Sentry has posted 2020 RH7 as an impact risk - see above
Noted that NEODyS has posted 2020 RH7 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 RJ2 risk assessment - see above
Noted that NEODyS has updated its 2020 RJ2 risk assessment - see above
Noted that NEODyS has posted 2020 RM6 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 RO2 risk assessment - see above
Noted that JPL Sentry has updated its 2020 RR4 risk assessment - see above
Noted that NEODyS has updated its 2020 RR4 risk assessment - see above
Noted that NEODyS has posted 2020 RV6 as an impact risk - see above
Noted that NEODyS has posted 2020 RZ6 as an impact risk - see above
Grabbed MPEC 2020-S21 - 2020 QQ7 - see above
Grabbed MPEC 2020-S22 - 2020 RE7 - see above
Grabbed MPEC 2020-S23 - 2020 RF7 - see above
Grabbed MPEC 2020-S24 - Daily Orbit Update - see above
Grabbed MPEC 2020-S25 - 2020 RH7 - see above
Grabbed MPEC 2020-S26 - 2020 RJ7 - see above
Grabbed MPEC 2020-S27 - 2020 RK7 - see above
Grabbed MPEC 2020-S28 - 2020 RL7 - see above
Grabbed MPEC 2020-S29 - 2020 RM7 - see above
Grabbed MPEC 2020-S30 - 2020 QR7 - see above
Noted Radar Astrometry database update - see above
0600Noted that JPL Sentry has updated its 2000 SG344 risk assessment - see above
Noted that JPL Sentry has updated its 2019 SC risk assessment - see above
Noted that JPL Sentry has updated its 2019 SE11 risk assessment - see above
Noted that JPL Sentry has posted 2020 RB7 as an impact risk - see above
Noted that JPL Sentry has posted 2020 RV6 as an impact risk - see above
Noted that JPL Sentry has posted 2020 RZ6 as an impact risk - see above
Grabbed MPEC 2020-S01 - 2020 RK6 - see above
Grabbed MPEC 2020-S02 - 2020 RL6 - see above
Grabbed MPEC 2020-S03 - 2020 RM6 - see above
Grabbed MPEC 2020-S04 - 2020 RN6 - see above
Grabbed MPEC 2020-S05 - 2020 RO6 - see above
Grabbed MPEC 2020-S06 - 2020 RP6 - see above
Grabbed MPEC 2020-S07 - 2020 RQ6 - see above
Grabbed MPEC 2020-S08 - 2020 RR6 - see above
Grabbed MPEC 2020-S09 - 2020 RS6 - see above
Grabbed MPEC 2020-S10 - 2020 RT6 - see above
Grabbed MPEC 2020-S11 - 2020 RU6 - see above
Grabbed MPEC 2020-S12 - 2020 RV6 - see above
Grabbed MPEC 2020-S13 - 2020 RW6 - see above
Grabbed MPEC 2020-S14 - 2020 RX6 - see above
Grabbed MPEC 2020-S15 - 2020 RY6 - see above
Grabbed MPEC 2020-S16 - 2020 RZ6 - see above
Grabbed MPEC 2020-S17 - 2020 RA7 - see above
Grabbed MPEC 2020-S18 - 2020 RB7 - see above
Grabbed MPEC 2020-S19 - 2020 RC7 - see above
Grabbed MPEC 2020-S20 - 2020 RD7 - see above