2020-09-04 Tracking News

Contents on 4 September '20

IAU Minor Planet Center
- NEOCP Activity -- 20 listings
- New MPECs -- four MPECs
Observers -- 35 observers
Impact Risk Monitoring -- seven objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1155 risk-listed objects, 142 have had news in the last 31 days. Updated at 2234 UTC on 4 Sept.
Earth's Busy Neighborhood traffic page
Ephemerides for risk-listed objects & close passers
News archive (old) & news image catalog (discontinued)
Object Links - mainly for radar targets & close passers (mostly discontinued)
Observing Campaigns (old)

The latest A/CC news is available via framed access, 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 4 September '20

The MPC's NEO Confirmation Page has 20 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 20 objects listed. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 25 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 4 September '20

Minor Planet Electronic Circulars

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

MPEC 2020-R06 time-stamped "12:06 UT" - Daily Orbit Update - see below
MPEC 2020-R07 time-stamped "20:05 UT" - 2020 RA - see below
MPEC 2020-R08 time-stamped "20:11 UT" - 2020 RB - see below
MPEC 2020-R09 time-stamped "23:37 UT" - 2020 OC8

MPEC 2020-R09 - "23:37 UT" - 2020 OC8

K20O08C 2020 OC8 (H=20.8 ~234m) was picked up at 1238 UT on 25 July by Pan-STARRS 2 (PS2), observing it at July 25.53-56p4, Aug. 11.50-54p7, 15.42-45p3, and 24.37-41p4. This detection was confirmed by the Mt. Lemmon Survey (MLS) (Aug. 14.31-33p4 & 18.27-29p4), Purple Mtn. Obs. Xuyi Station (Aug. 14.68-71p3), ATLAS Haleakala (Aug. 21.38-41p4), Pan-STARRS 1 (PS1) (Sept. 4.37-41p4), Paus Obs. (Sept. 4.82-85p5), Forti Obs. (Sept. 4.86-88p3), Guidestar Obs. (Sept. 4.90-93p4), Clixby Obs. (Sept. 4.91-92p3), and Farra d'Isonzo Obs. (Sept. 4.93-95p3).

MPEC 2020-R08 - "20:11 UT" - 2020 RB

K20R00B 2020 RB (risk listed, i=59.5°, Q=5.877 AU, Earth MOID=2.9 LD, H=19.20 ~490m) was picked up at 0544 UT on 3 Sept. by ATLAS Mauna Loa, observing it at Sept. 3.24-26p4 and 4.28-30p4. This detection was confirmed by M57 Obs. (Sept. 3.79-80p3), Farra d'Isonzo Obs. (Sept. 3.79-81p4), Schiaparelli Obs. (Sept. 3.81-83p5), Dax Obs. (Sept. 3.83-84p3), GiaGa Obs. (Sept. 3.84-86p3), St. Pardon de Conques Obs. (Sept. 3.87-88p3), Squirrel Valley Obs. (Sept. 4.03-04p4), Sandlot Obs. (Sept. 4.08-09p3), Steward Obs. Mt. Lemmon Station (Sept. 4.12p3), Castelmartini Obs. (Sept. 4.78-79p5), Forti Obs. (Sept. 4.80p3), and San Marcello Pistoiese Obs. (Sept. 4.82-83p3).

MPEC 2020-R07 - "20:05 UT" - 2020 RA

K20R00A 2020 RA (small asteroid, H=24.37 ~45m) was picked up at 0948 UT on 3 Sept. by ATLAS Haleakala, observing it at Sept. 3.41-45p4 and 3.50p3. This detection was confirmed by ATLAS Mauna Loa (Sept. 3.50p4), Schiaparelli Obs. (Sept. 3.84-86p5), Farra d'Isonzo Obs. (Sept. 3.84-86p6), Dax Obs. (Sept. 3.86-88p3), M57 Obs. (Sept. 3.87-89p4), GiaGa Obs. (Sept. 3.88-90p3), St. Pardon de Conques Obs. (Sept. 3.89-91p3), Paus Obs. (Sept. 3.90-92p6), Clixby Obs. (Sept. 3.91-92p3), Great Shefford Obs. (Sept. 3.98-00p4), Squirrel Valley Obs. (Sept. 4.07-08p3), Sandlot Obs. (Sept. 4.10-12p5), Steward Mt. Lemmon Sta. (Sept. 4.23-24p4), Pomona College Table Mtn. Obs. (PCTMO) (Sept. 4.24-28p3), Golden Ears Obs. (Sept. 4.28-29p3), PS2 (Sept. 4.39-41p2), and Forti Obs. (Sept. 4.82-83p3).

<< DOU on 4 September '20 >> MPEC 2020-R06 - "12:06 UT" - Daily Orbit Update

Observations of risk-listed objects
K11B40H 2011 BH40 from PS1 (2011 Jan. 27.53-54p2 & 2011 Jan. 28.53-54p2)
Observations of recently (no longer) risk-listed objects
K20Q03G 2020 QG3 (arc=17 days, H=21.3 ~186m) from Steward Mt. Lemmon Sta. (Sept. 4.40p4)
Observations of close-passing objects
K20P04T 2020 PT4 (arc=22 days, H=24.9 ~35m) from Paus Obs. (Sept. 3.93-94p3) and GiaGa Obs. (Sept. 3.95-97p3)
Observation campaigns (NHATS targets, radar support)
K20Q02L 2020 QL2 (arc=20 days, H=23.4 ~71m, NHATS) from PS1 (Sept. 3.47-48p2)
K20M00X 2020 MX (arc=45 days, H=24.0 ~54m, NHATS) from SATINO-1 (July 13.93-95p2)
K20H05X 2020 HX5 (arc=136 days, H=22.4 ~112m, NHATS) from Steward Mt. Lemmon Sta. (Sept. 4.19p2)
J0166 190166 2005 UP156 (radar) from ATLAS Mauna Loa (Sept. 3.26-29p3)
03200 3200 Phaethon (1983 TB) (radar) from ATLAS Haleakala (Sept. 3.59-61p4)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20Q06V 2020 QV6 (q=0.319 AU, arc=7 days, H=22.4 ~112m) from N.V. Maigurova via Nikolaev Obs. (Aug. 31.85-87p9), ATLAS Mauna Loa (Sept. 3.45-46p4), and Steward Mt. Lemmon Sta. (Sept. 4.24p4)
K20P00G 2020 PG (arc=28 days, H=23.7 ~62m) from Steward Mt. Lemmon Sta. (Sept. 4.36p2)
K20O04A 2020 OA4 (arc=42 days, H=22.4 ~112m) from PS1 (Sept. 3.47-48p3)
K20Q01Y 2020 QY1 (Q=4.748 AU, arc=22 days, H=22.0 ~135m) from Steward Mt. Lemmon Sta. (Sept. 4.15-16p3)
K20M04O 2020 MO4 (arc=75 days, H=21.9 ~141m) from Steward Mt. Lemmon Sta. (Sept. 4.13-14p4 at G=20.8-22.1)
Observations of other objects
K20Q06K 2020 QK6 (arc=9 days, H=20.8 ~234m) from Steward Mt. Lemmon Sta. (Sept. 4.35-36p4)
K20Q06C 2020 QC6 (arc=37 days, H=20.5 ~269m) from Steward Mt. Lemmon Sta. (Sept. 4.47p3)
K20Q05O 2020 QO5 (arc=15 days, H=19.0 ~537m) from Steward Mt. Lemmon Sta. (Sept. 4.43-44p4)
K20Q04M 2020 QM4 (arc=16 days, H=18.5 ~676m) from Steward Mt. Lemmon Sta. (Sept. 4.40-42p4)
K20Q02W 2020 QW2 (arc=17 days, H=20.5 ~269m) from Steward Mt. Lemmon Sta. (Sept. 4.20-21p4)
K20Q01M 2020 QM1 (arc=17 days, H=21.3 ~186m) from GiaGa Obs. (Sept. 3.92-94p3)
K20Q00X 2020 QX (arc=19 days, H=21.3 ~186m) from Steward Mt. Lemmon Sta. (Sept. 4.14-15p4)
K20P07F 2020 PF7 (Q=5.014 AU, arc=27 days, H=18.9 ~562m) from Steward Mt. Lemmon Sta. (Sept. 4.33-35p4)
K20P03X 2020 PX3 (arc=21 days, H=20.4 ~282m) from Steward Mt. Lemmon Sta. (Sept. 4.22-23p4)
K20P03C 2020 PC3 (i=43.3°, arc=22 days, H=20.3 ~295m) from Steward Mt. Lemmon Sta. (Sept. 4.24p4)
K20P01Y 2020 PY1 (arc=25 days, H=20.5 ~269m) from Steward Mt. Lemmon Sta. (Sept. 4.12-13p4)
K20O07S 2020 OS7 (Q=4.462 AU, arc=49 days, H=20.2 ~309m) from Steward Mt. Lemmon Sta. (Sept. 4.20-22p4)
K20O07C 2020 OC7 (arc=70 days, H=20.8 ~234m) from Steward Mt. Lemmon Sta. (Sept. 4.45-46p4)
K20O04G 2020 OG4 (arc=41 days, H=18.6 ~645m) from Xuyi Sta. (Sept. 2.75-78p3)
K20O01M 2020 OM1 (arc=47 days, H=20.9 ~224m) from Steward Mt. Lemmon Sta. (Sept. 4.18-19p2)
K20N01M 2020 NM1 (arc=55 days, H=20.1 ~323m) from Farpoint Obs. (Sept. 4.12-14p5)
K20M03L 2020 ML3 (arc=79 days, H=20.7 ~245m) from PS2 (Sept. 3.49-52p4)
K20M00P 2020 MP (arc=80 days, H=20.6 ~257m) from Clixby Obs. (Sept. 3.97p3)
K19A05N 2019 AN5 (arc=5 opp, H=21.1 ~204m) from Maigurova/Nikolaev Obs. (Aug. 13.99-01p10, 14.99-01p10 & 16.98-01p7)
K17Y08S 2017 YS8 (arc=56 days, H=19.4 ~446m) from MLS (2017 Dec. 8.54-55p4 & 2017 Dec. 30.42-43p3) and the Catalina Sky Survey (CSS) (2017 Dec. 28.52-53p4)
K17S14N 2017 SN14 (arc=4 opp, H=18.8 ~589m) from Steward Mt. Lemmon Sta. (Sept. 4.48p4)
K16N38V 2016 NV38 (Q=4.020 AU, arc=2 opp, H=18.6 ~645m) from Northolt Branch Obs. (Sept. 1.91-92p3) and ATLAS Haleakala (Sept. 3.46-47p4)
K13U14X 2013 UX14 (arc=4 opp, H=18.1 ~812m) from ATLAS Mauna Loa (Sept. 3.49-51p4)
K10JF3V 2010 JV153 (arc=3 opp, H=19.7 ~389m) from ATLAS Mauna Loa (Sept. 3.38-40p4)
K09F29Y 2009 FY29 (arc=3 opp, H=20.0 ~339m) from PS1 (Sept. 3.46-49p3)
K06U63D 2006 UD63 (arc=4 opp, H=19.0 ~537m) from ATLAS Mauna Loa (Sept. 3.44-46p4)
K06H00B 2006 HB (arc=4 opp, H=18.9 ~562m) from Maigurova/Nikolaev Obs. (Aug. 13.89-91p8, 14.88-90p10, 16.88-90p10 & 17.88-90p10)
K05Q10S 2005 QS10 (arc=4 opp, H=18.8 ~589m) from Pin Oak Obs. (Sept. 4.12p1, 4.17p1 & 4.21p1)
K00P27Q 2000 PQ27 (arc=3 opp, H=19.9 ~355m) from PS1 (Sept. 3.46-49p4)
o0094 500094 2012 BC20 from ATLAS Mauna Loa (Sept. 3.40-42p4) and Pin Oak Obs. (Sept. 4.14p1 & 4.18p1)
k5824 465824 2010 FR from Northolt Branch Obs. (Sept. 1.94-95p3) and Xuyi Sta. (Sept. 2.75-77p3)
g8086 428086 2006 NM from Xuyi Sta. (Sept. 2.79-82p6)
g0302 420302 2011 XZ1 from ATLAS Haleakala (Sept. 3.42-44p4), program code 1 via Kuban State Univ. Obs. (Sept. 3.71-80p27), and Pin Oak Obs. (Sept. 4.25-32p3)
d2211 392211 2009 TG10 from PS1 (Sept. 3.51-54p4)
c2625 382625 2002 PC130 from Northolt Branch Obs. (Sept. 1.92-93p4) and Tentlingen Obs. (Sept. 3.01-05p4)
G3081 163081 2002 AG29 from Xuyi Sta. (Sept. 2.50-52p3)
G2173 162173 Ryugu (1999 JU3) from ATLAS Haleakala (Sept. 3.42-44p4)
F9929 159929 2005 UK from PS1 (Sept. 4.30-33p3)
F9402 159402 1999 AP10 from Pin Oak Obs. (Sept. 4.25-31p3)
D7799 137799 1999 YB from ATLAS Mauna Loa (Sept. 3.44-46p4)
D6900 136900 1998 HL49 from Northolt Branch Obs. (Sept. 1.90p2), Tentlingen Obs. (Sept. 2.91-94p4), ATLAS Haleakala (Sept. 3.35-38p6), and Pin Oak Obs. (Sept. 4.09p1, 4.15p1 & 4.20p1)
B5052 115052 2003 RD6 from Xuyi Sta. (Sept. 2.50-52p3)
A5140 105140 2000 NL10 from Xuyi Sta. (Sept. 2.56-59p3)
96744 96744 1999 OW3 from Xuyi Sta. (Sept. 2.72-74p3) and ATLAS Haleakala (Sept. 3.49-52p4)
66146 66146 1998 TU3 from ATLAS Haleakala (Sept. 3.61-63p4)
66008 66008 1998 QH2 from Tentlingen Obs. (Sept. 2.96-00p3), ATLAS Haleakala (Sept. 3.39-40p3), and Foxfire Village Obs. (Sept. 4.04-07p2)
54789 54789 2001 MZ7 from ATLAS Mauna Loa (Sept. 3.40-42p4)
53430 53430 1999 TY16 from PS2 (Sept. 4.25-28p3) and PS1 (Sept. 4.29-33p4)
24761 24761 Ahau (1993 BW2) from the Zwicky Transient Facility (ZTF) (Sept. 1.50-51p4)
23187 23187 2000 PN9 from ATLAS Haleakala (Sept. 3.37-39p4)
20826 20826 2000 UV13 from ATLAS Mauna Loa (Sept. 3.44-46p4)
19764 19764 2000 NF5 from Maigurova/Nikolaev Obs. (Aug. 15.02-04p10, 16.02-05p5, 17.01-03p10 & 18.01-05p8)
11405 11405 1999 CV3 from ATLAS Mauna Loa (Sept. 3.24-26p3)
05863 5863 Tara (1983 RB) from Castelmartini Obs. (2016 Aug. 13.84p3)
05645 5645 1990 SP from MASTER OAFA Obs. (Sept. 3.32p2) and ATLAS Mauna Loa (Sept. 3.52-53p4)
04953 4953 1990 MU from ATLAS Mauna Loa (Sept. 3.53-54p4)
04947 4947 Ninkasi (1988 TJ1) from ATLAS Haleakala (Sept. 3.31-33p4)
04055 4055 Magellan (1985 DO2) from Maigurova/Nikolaev Obs. (Aug. 15.06-08p9, 16.06-08p8 & 17.03-05p8)
02368 2368 Beltrovata (1977 RA) from ATLAS Haleakala (Sept. 3.56-58p4)
01685 1685 Toro (1948 OA) from ZTF (Sept. 3.50-52p5)
01036 1036 Ganymed (1924 TD) from ATLAS Haleakala (Sept. 3.59-62p4)
00887 887 Alinda (1918 DB) from Maigurova/Nikolaev Obs. (Aug. 18.02-04p6)
00433 433 Eros (1898 DQ) from ZTF (Sept. 3.50-52p5)

Observers on 4 September '20

A total of 35 observers appear in today's MPECs.

Code	Observer / observatory
`T05`	ATLAS Haleakala in Hawaii, 14 in MPECs 2020-R06, 2020-R07 & 2020-R09 -- 2020 RA, 2020 OC8, 2016 NV38, 96744, 66146, 66008, 420302, 23187, 162173, 136900, 4947, 3200, 2368, 1036
`T08`	ATLAS Mauna Loa in Hawaii, 14 in MPECs 2020-R06, 2020-R07 & 2020-R08 -- 2020 RB, 2020 RA, 2020 QV6, 2013 UX14, 2010 JV153, 2006 UD63, 54789, 500094, 20826, 190166, 137799, 11405, 5645, 4953
`160`	Castelmartini Obs. in Italy, 2 in MPECs 2020-R06 & 2020-R08 -- 2020 RB, 5863
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2020-R06 -- 2017 YS8
`Z99`	Clixby Obs. in England, 3 in MPECs 2020-R06, 2020-R07 & 2020-R09 -- 2020 RA, 2020 OC8, 2020 MP
`958`	Dax Obs. in France, 2 in MPECs 2020-R07 & 2020-R08 -- 2020 RB, 2020 RA
`734`	Farpoint Obs. in Kansas, 1 in MPEC 2020-R06 -- 2020 NM1
`595`	Farra d'Isonzo Obs. in Italy, 3 in MPECs 2020-R07, 2020-R08 & 2020-R09 -- 2020 RB, 2020 RA, 2020 OC8
`K83`	Forti Obs., 3 in MPECs 2020-R07, 2020-R08 & 2020-R09 -- 2020 RB, 2020 RA, 2020 OC8
`W46`	Foxfire Village Obs., 1 in MPEC 2020-R06 -- 66008
`203`	GiaGa Obs. in Italy, 4 in MPECs 2020-R06, 2020-R07 & 2020-R08 -- 2020 RB, 2020 RA, 2020 QM1, 2020 PT4
`U55`	Golden Ears Obs., 1 in MPEC 2020-R07 -- 2020 RA
`J95`	Great Shefford Obs. in England, 1 in MPEC 2020-R07 -- 2020 RA
`A17`	Guidestar Obs. in Germany, 1 in MPEC 2020-R09 -- 2020 OC8
`C401`	program code 1 via Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-R06 -- 420302
`K38`	M57 Obs. in Italy, 2 in MPECs 2020-R07 & 2020-R08 -- 2020 RB, 2020 RA
`W92`	MASTER OAFA Obs., 1 in MPEC 2020-R06 -- 5645
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2020-R06 & 2020-R09 -- 2020 OC8, 2017 YS8
`0895`	N.V. Maigurova via Nikolaev Obs. in Ukraine, 6 in MPEC 2020-R06 -- 2020 QV6, 2019 AN5, 2006 HB, 19764, 4055, 887
`Z80`	Northolt Branch Obs. in England, 4 in MPEC 2020-R06 -- 2016 NV38, 465824, 382625, 136900
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 9 in MPECs 2020-R06 & 2020-R09 -- 2020 QL2, 2020 OC8, 2020 OA4, 2011 BH40, 2009 FY29, 2000 PQ27, 53430, 392211, 159929
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 4 in MPECs 2020-R06, 2020-R07 & 2020-R09 -- 2020 RA, 2020 OC8, 2020 ML3, 53430
`B49`	Paus Obs. in Spain, 3 in MPECs 2020-R06, 2020-R07 & 2020-R09 -- 2020 RA, 2020 PT4, 2020 OC8
`V93`	Pin Oak Obs., 5 in MPEC 2020-R06 -- 2005 QS10, 500094, 420302, 159402, 136900
`654`	Pomona College Table Mtn. Obs. in southern California, 1 in MPEC 2020-R07 -- 2020 RA
`D29`	Purple Mtn. Obs. Xuyi Station in China, 8 in MPECs 2020-R06 & 2020-R09 -- 2020 OG4, 2020 OC8, 96744, 465824, 428086, 163081, 115052, 105140
`104`	San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2020-R08 -- 2020 RB
`H36`	Sandlot Obs. in Kansas, 2 in MPECs 2020-R07 & 2020-R08 -- 2020 RB, 2020 RA
`C95`	SATINO-1 in France, 1 in MPEC 2020-R06 -- 2020 MX
`204`	Schiaparelli Obs. in Italy, 2 in MPECs 2020-R07 & 2020-R08 -- 2020 RB, 2020 RA
`W34`	Squirrel Valley Obs. in North Carolina, 2 in MPECs 2020-R07 & 2020-R08 -- 2020 RB, 2020 RA
`I93`	St. Pardon de Conques Obs. in France, 2 in MPECs 2020-R07 & 2020-R08 -- 2020 RB, 2020 RA
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 22 in MPECs 2020-R06, 2020-R07 & 2020-R08 -- 2020 RB, 2020 RA, 2020 QY1, 2020 QX, 2020 QW2, 2020 QV6, 2020 QO5, 2020 QM4, 2020 QK6, 2020 QG3, 2020 QC6, 2020 PY1, 2020 PX3, 2020 PG, 2020 PF7, 2020 PC3, 2020 OS7, 2020 OM1, 2020 OC7, 2020 MO4, 2020 HX5, 2017 SN14
`A16`	Tentlingen Obs. in Switzerland, 3 in MPEC 2020-R06 -- 66008, 382625, 136900
`I41`	Zwicky Transient Facility (ZTF) in southern California, 3 in MPEC 2020-R06 -- 24761, 1685, 433

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 4 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 RB	JPL Sentry	2232	2106-2106	1	5.216e-10	-6.18	-6.18	0	JPL: Computed at 14:26 today Pacific time based on 50 observations spanning 1.5874 days (2020-Sep-03.239448 to 2020-Sep-04.82682). Diameter approximately 0.490 km. from weighted mean H=19.20.

2017 YD2	NEODyS	1700	R E M O V E D						-

2017 RZ15	JPL Sentry	1701	2071-2117	29	5.0389714e-05	-5.64	-5.99	0	JPL: Computed at 08:23 Sept. 20th of 2017 Pacific time based on 9 observations spanning 2.8111 days (2017-Sep-15.41445 to 2017-Sep-18.2255). Diameter approximately 0.013 km. from weighted mean H=27.15.

2016 PA79	JPL Sentry	1701	2037-2102	10	1.06271e-08	-7.56	-8.16	0	JPL: Computed at 21:05 April 9th of 2017 Pacific time based on 6 observations spanning .80446 days (2016-Aug-08.56217 to 2016-Aug-09.366628). Diameter approximately 0.047 km. from weighted mean H=24.31.

2016 DA31	JPL Sentry	1701	2031-2117	189	0.0002853729145	-5.44	-5.74	0	JPL: Computed at 12:36 April 8th of 2017 Pacific time based on 14 observations spanning .85160 days (2016-Feb-28.4092 to 2016-Feb-29.2608). Diameter approximately 0.004 km. from weighted mean H=29.90.

2011 BH40	JPL Sentry	1701	R E M O V E D						JPL: Risk listing removed at 1634 UTC today
2011 BH40	NEODyS	1700	R E M O V E D						-

2008 EM68	JPL Sentry	1701	2020-2116	1089	1.05924711e-05	-5.31	-5.65	0	JPL: Computed at 00:27 April 7th of 2017 Pacific time based on 12 observations spanning .11019 days (2008-Mar-08.25164 to 2008-Mar-08.36183). Diameter approximately 0.010 km. from weighted mean H=27.72.

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 4 September '20

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

2358	Grabbed MPEC 2020-R09 - 2020 OC8 - see above
2232	Noted that JPL Sentry has posted 2020 RB as an impact risk - see above Grabbed MPEC 2020-R07 - 2020 RA - see above Grabbed MPEC 2020-R08 - 2020 RB - see above
1701	Noted that JPL Sentry has updated its 2008 EM68 risk assessment - see above Noted that JPL Sentry has removed 2011 BH40 as an impact risk - see above Noted that JPL Sentry has updated its 2016 DA31 risk assessment - see above Noted that JPL Sentry has updated its 2016 PA79 risk assessment - see above Noted that JPL Sentry has updated its 2017 RZ15 risk assessment - see above
1700	Noted that NEODyS has removed 2011 BH40 as an impact risk - see above Noted that NEODyS has removed 2017 YD2 as an impact risk - see above Grabbed MPEC 2020-R06 - Daily Orbit Update - see above

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