2020-05-31 Tracking News

Contents on 31 May '20

IAU Minor Planet Center
- NEOCP Activity -- 54 listings
- New MPECs -- nine MPECs
Observers -- 32 observers
Impact Risk Monitoring -- four objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1148 risk-listed objects, 884 have had news in the last 31 days. Updated at 2307 UTC on 31 May.
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 31 May '20

The MPC's NEO Confirmation Page has 54 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 54 objects listed. Of these, 35 were "one nighters." So far The Tracking News has counted a total of 66 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 31 May '20

Minor Planet Electronic Circulars

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

MPEC 2020-K227 time-stamped "02:39 UT" - 2020 KA7 - see below
MPEC 2020-K228 time-stamped "11:57 UT" - 2020 KB7 - see below
MPEC 2020-K229 time-stamped "12:01 UT" - Daily Orbit Update - see below
MPEC 2020-K230 time-stamped "15:00 UT" - 2013 LF1 - see below
MPEC 2020-K231 time-stamped "18:37 UT" - 2020 KC7 - see below
MPEC 2020-K232 time-stamped "18:38 UT" - 2020 KD7 - see below
MPEC 2020-K233 time-stamped "18:41 UT" - 2020 KE7 - see below
MPEC 2020-K234 time-stamped "20:55 UT" - 2020 KH7 - see below
MPEC 2020-K235 time-stamped "21:04 UT" - 2020 KJ7

MPEC 2020-K235 - "21:04 UT" - 2020 KJ7

K20K07J 2020 KJ7 (small asteroid, Earth MOID=9.9 LD, H=25.2 ~31m) was picked up at 1005 UT on 26 May by Pan-STARRS 1 (PS1), observing it at May 26.42-46p4 at w=21.89-22.13 and 28.46-49p3 at G=21.6. This detection was confirmed by Pan-STARRS 2 (PS2) (May 14.45-47p2 at G=22.1-3, 24.49-52p3 at G=22.2-6 & 31.52-55p4 at w=21.58-22.10) and R. Wainscoat on Mauna Kea (May 27.47-48p9).

MPEC 2020-K234 - "20:55 UT" - 2020 KH7

K20K07H 2020 KH7 (i=106.2°, q=3.953 AU, Q=11.902 AU, H=15.07 ~3.28 km) was picked up at 1238 UT on 29 May by PS1, observing it at 2019 July 2.41-44p3 at G=22.6-23.6, 2019 July 24.48-50p3 at G=21.8-22.7, 2019 July 27.33-36p4 at G=22.5-7, May 19.44-48p4 at G=21.6-8, and 29.53-55p3 at w=21.54-63. This detection was confirmed by Astronomical Research Obs. Westfield (May 30.27-28p3 & 31.28-31p4).

MPEC 2020-K233 - "18:41 UT" - 2020 KE7

K20K07E 2020 KE7 (Q=4.320 AU, H=20.8 ~234m) was picked up at 1347 UT on 29 May by PS1, observing it at May 28.57p1 and 29.57-60p4. This detection was confirmed by Mt. John Obs. (May 30.69-70p4 & 31.71p3).

MPEC 2020-K232 - "18:38 UT" - 2020 KD7

K20K07D 2020 KD7 (H=20.0 ~339m) was picked up at 1321 UT on 28 May by PS1, observing it at May 28.56-59p4. This detection was confirmed by Mt. John Obs. (May 29.68-69p3, 30.68-69p3 & 31.66-67p4).

MPEC 2020-K231 - "18:37 UT" - 2020 KC7

K20K07C 2020 KC7 (i=50.2°, H=20.9 ~224m) was picked up at 1320 UT on 28 May by PS1, observing it at May 28.56-59p4. This detection was confirmed by Mt. John Obs. (May 29.64-65p3, 30.65-66p3 & 31.65-66p4).

MPEC 2020-K230 - "15:00 UT" - 2013 LF1

K13L01F 2013 LF1 (small asteroid, H=22.2 ~123m) from UH/Tholen NEO Follow-Up 2.24m Telescope (2016 May 3.40-41p2 at G=23.00-18, 2016 May 4.38-39p2 at G=23.64-80 & 2019 April 10.43p1 at G=24.90)

<< DOU on 31 May '20 >> MPEC 2020-K229 - "12:01 UT" - Daily Orbit Update

Observations of risk-listed objects
K20K05C 2020 KC5 (small asteroid, arc=4 days, H=27.4 ~11m, close passer) from Northolt Branch Obs. (May 29.94-95p3)
Observations of close-passing objects
K20K04Z 2020 KZ4 (arc=6 days, H=26.5 ~17m) from Clixby Obs. (May 30.99p3)
K20K04Q 2020 KQ4 (arc=6 days, H=26.5 ~17m, NHATS target) from Mt. John Obs. (May 30.34-35p6)
K13X22A 2013 XA22 (arc=2 opp, H=22.9 ~89m, NHATS target) from Frasnes-Lez-Anvaing Obs. (May 30.03p1 & 30.07p1), Pin Oak Obs. (May 30.15-20p3), and Clixby Obs. (May 30.95-96p6)
Observation campaigns (NHATS targets, radar support)
K20K05R 2020 KR5 (arc=5 days, H=22.3 ~117m, NHATS) from PS2 (May 30.57-60p3)
K20K01V 2020 KV1 (arc=10 days, H=26.3 ~19m, NHATS) from Mt. John Obs. (May 30.43p4)
K20J02Z 2020 JZ2 (arc=15 days, H=25.7 ~25m, NHATS) from ARO Westfield (May 30.12-14p3 at V=22.1-5)
K06B98R 2006 BR98 (NHATS) from Cordell-Lorenz Obs. (2006 Feb. 1.34p1)
K01Q34C 2001 QC34 (arc=4 opp, H=20.2 ~309m, NHATS) from ATLAS Mauna Loa (May 30.35-37p4)
04179 4179 Toutatis (1989 AC) (radar) from ATLAS Mauna Loa (May 30.46-49p4)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small asteroids (H>22.0)
K20K04G 2020 KG4 (Q=4.610 AU, arc=7 days, H=25.0 ~34m) from ATLAS Mauna Loa (May 30.40-42p4) and Mt. John Obs. (May 30.51-52p4)
K20K03T 2020 KT3 (arc=9 days, H=23.7 ~62m) from ARO Westfield (May 30.28-30p3 at V=21.5-22.1)
K20K03L 2020 KL3 (arc=9 days, H=24.4 ~45m) from ARO Westfield (May 30.23-25p3 at V=22.1-3)
K20K03K 2020 KK3 (arc=11 days, H=25.4 ~28m) from Mt. John Obs. (May 30.47-48p3)
K20K02Y 2020 KY2 (arc=16 days, H=23.5 ~68m) from Mt. John Obs. (May 30.50-51p3)
K20K02E 2020 KE2 (Q=4.401 AU, arc=13 days, H=23.3 ~74m) from PS2 (May 30.53-55p3)
K20K02B 2020 KB2 (arc=13 days, H=24.6 ~41m) from ARO Westfield (May 30.18-20p3 at V=21.9-22.2)
K20K00C 2020 KC (arc=16 days, H=24.4 ~45m) from Mt. John Obs. (May 30.42p4)
K20J02L 2020 JL2 (arc=15 days, H=23.5 ~68m) from PS1 (May 30.40-43p3)
K20J01W 2020 JW1 (arc=27 days, H=22.5 ~107m) from PS2 (May 30.54-56p3)
K20J00T 2020 JT (arc=29 days, H=22.4 ~112m) from PS1 (May 30.39-42p4)
K20H09V 2020 HV9 (arc=35 days, H=22.6 ~102m) from Mt. John Obs. (May 30.41p3)
K20H02T 2020 HT2 (arc=70 days, H=22.4 ~112m) from Mt. John Obs. (May 30.36p4)
Observations of other objects
K20K05Q 2020 KQ5 (Q=4.686 AU, arc=6 days, H=20.2 ~309m) from Tony Evans via Slooh.com Canary Islands Obs. (May 31.11-13p2)
K20H10Y 2020 HY10 (arc=72 days, H=20.4 ~282m) from ARO Westfield (May 30.13-15p3 at V=21.8-22.4)
K20H10J 2020 HJ10 (arc=31 days, H=21.2 ~195m) from ARO Westfield (May 30.30-31p2 at V=22.2-3)
K20F06H 2020 FH6 (arc=66 days, H=20.0 ~339m) from the Zwicky Transient Facility (ZTF) (May 29.42-46p2, 30.42p1 & 30.48p1)
K20F03W 2020 FW3 (arc=70 days, H=21.1 ~204m) from ATLAS Haleakala (May 30.38-41p4)
K20B05O 2020 BO5 (arc=131 days, H=21.1 ~204m) from ATLAS Mauna Loa (May 30.38-42p4)
K20B05N 2020 BN5 (arc=152 days, H=21.1 ~204m) from Schiaparelli Obs. (May 29.03-06p2) and Great Shefford Obs. (May 29.06-07p2 & 30.02-04p2)
K19Y04H 2019 YH4 (i=42.8°, arc=172 days, H=20.1 ~323m) from Mt. John Obs. (May 30.30-31p3)
K19U09O 2019 UO9 (arc=2 opp, H=19.7 ~389m) from ATLAS Mauna Loa (May 30.35-37p4)
K19P03C 2019 PC3 (arc=4 opp, H=21.1 ~204m) from Mt. John Obs. (May 30.32-33p4)
K16L47Y 2016 LY47 (arc=2 opp, H=19.8 ~371m) from the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (May 22.45-46p4 at G=22.2-9 & 26.44-45p3 at G=21.9-23.1)
K15H10H 2015 HH10 (arc=6 opp, H=18.3 ~741m) from PS1 (May 30.55-59p3)
K10ED5C 2010 EC135 (arc=3 opp, H=20.3 ~295m) from ATLAS Haleakala (May 30.35-39p4) and Clixby Obs. (May 30.96-98p4)
K05M05R 2005 MR5 (arc=3 opp, H=20.5 ~269m) from ATLAS Mauna Loa (May 30.57-61p4)
p8737 518737 2009 OO9 from PS1 (May 30.51-54p3)
o6459 506459 2002 AL14 from ZTF (May 29.41p1 & 29.45-48p3)
n8550 498550 2008 HV4 from PS1 (May 30.50-51p2)
n5891 495891 2004 VS60 from ATLAS Mauna Loa (May 30.43-48p4)
n5615 495615 2015 PQ291 from Pin Oak Obs. (May 30.16-19p2)
m3878 483878 2005 YS165 from PS2 (May 30.32-36p4)
l7885 477885 2011 JT9 from Landehen Obs. (May 29.92-96p3)
g8086 428086 2006 NM from ATLAS Mauna Loa (May 30.57-60p4)
g0302 420302 2011 XZ1 from ATLAS Mauna Loa (May 30.51-53p3)
f5711 415711 1998 WT7 from ATLAS Mauna Loa (May 30.33-35p3)
a9264 369264 2009 MS from ATLAS Mauna Loa (May 30.40-41p4)
Y9063 349063 2006 XA from ATLAS Mauna Loa (May 30.46-49p3)
X3555 333555 2005 VY17 from ATLAS Haleakala (May 30.32-36p4)
X1471 331471 1984 QY1 from PS2 (May 30.53-55p3) and ATLAS Haleakala (May 30.53-60p4)
V8050 318050 2004 FC32 from ATLAS Haleakala (May 30.30-32p4)
N1792 231792 2000 DH8 from ZTF (May 28.28p1, 28.39p1 & 29.32-35p2)
M8587 228587 2002 AP7 from PS1 (May 30.55-59p4)
J2563 192563 1998 WZ6 from ATLAS Mauna Loa (May 30.59-62p4)
I4990 184990 2006 KE89 from Landehen Obs. (May 29.91-96p5), Pin Oak Obs. (May 30.24-31p3), and Wishing Star Obs. (May 31.08p3)
H5189 175189 2005 EC224 from Pin Oak Obs. (May 30.14-20p3)
F9929 159929 2005 UK from ATLAS Haleakala (May 30.27-30p4)
F9608 159608 2002 AC2 from ATLAS Haleakala (May 30.56-58p4)
F2756 152756 1999 JV3 from ATLAS Haleakala (May 30.49-50p3)
E5656 145656 4788 P-L from ATLAS Haleakala (May 30.58-61p3)
E4861 144861 2004 LA12 from PS2 (May 30.33-35p3)
E4411 144411 2004 EW9 from SONEAR (May 31.00-01p2)
E2781 142781 2002 UM11 from PS1 (May 30.49-53p3)
E1078 141078 2001 XQ30 from ATLAS Mauna Loa (May 30.42-47p4)
D7199 137199 1999 KX4 from Glendora Obs. (May 28.21-24p3), Pin Oak Obs. (May 30.22-29p3), ATLAS Haleakala (May 30.34-37p4), PS2 (May 30.43-45p3), and Wishing Star Obs. (May 31.04p3)
D7170 137170 1999 HF1 from ATLAS Haleakala (May 30.59-62p4) and the Catalina Sky Survey (CSS) (May 31.40-41p3)
D7064 137064 1998 WP5 from ATLAS Mauna Loa (May 30.33-34p4)
D6874 136874 1998 FH74 from Pin Oak Obs. (May 30.23-27p2) and ATLAS Haleakala (May 30.36-40p4)
A6589 106589 2000 WN107 from PS2 (May 31.26-31p4)
99935 99935 2002 AV4 from ATLAS Mauna Loa (May 30.26-29p4)
86667 86667 2000 FO10 from Pin Oak Obs. (May 30.12-18p3) and ATLAS Haleakala (May 30.27-29p4)
86067 86067 1999 RM28 from ZTF (May 28.21p1)
85275 85275 1994 LY from ATLAS Haleakala (May 30.47-48p4)
85184 85184 1991 JG1 from ATLAS Haleakala (May 30.33-34p4) and PS2 (May 30.43-46p4)
68350 68350 2001 MK3 from ATLAS Haleakala (May 30.32-34p4), PS1 (May 30.39-41p3), PS2 (May 30.43-46p4), and Wishing Star Obs. (May 31.10-11p3)
54789 54789 2001 MZ7 from ZTF (May 27.45-46p2, 30.41p1 & 30.46p1)
54401 54401 2000 LM from ATLAS Mauna Loa (May 30.33-35p4)
36183 36183 1999 TX16 from ATLAS Mauna Loa (May 30.38-42p4)
35107 35107 1991 VH from ATLAS Haleakala (May 30.26-29p8)
23187 23187 2000 PN9 from Ageo Obs. (2006 March 7.62p4)
19764 19764 2000 NF5 from ATLAS Mauna Loa (May 30.58-61p4)
08014 8014 1990 MF from MASTER OAFA Obs. (May 30.19-20p2), Pin Oak Obs. (May 30.23-29p3), and ATLAS Mauna Loa (May 30.43-48p4)
07977 7977 1977 QQ5 from ATLAS Haleakala (May 30.53-60p4)
06569 6569 Ondaatje (1993 MO) from ATLAS Haleakala (May 30.50-51p3)
06050 6050 Miwablock (1992 AE) from ATLAS Mauna Loa (May 30.39-44p4)
05751 5751 Zao (1992 AC) from ATLAS Mauna Loa (May 30.46-49p4) and PS1 (May 30.55-59p4)
05646 5646 1990 TR from SATINO-1 (Feb. 26.78-80p3)
04954 4954 Eric (1990 SQ) from ATLAS Mauna Loa (May 30.32-34p4)
04055 4055 Magellan (1985 DO2) from ATLAS Haleakala (May 30.59-61p4)
03691 3691 Bede (1982 FT) from ATLAS Mauna Loa (May 30.59-61p4)
02135 2135 Aristaeus (1977 HA) from ARO Westfield (May 30.35-36p3 at V=22.1-3)
01917 1917 Cuyo (1968 AA) from ATLAS Haleakala (May 30.39-42p4)

MPEC 2020-K228 - "11:57 UT" - 2020 KB7

K20K07B 2020 KB7 (Earth MOID=4.3 LD, H=27.7 ~10m) was picked up at 1025 UT on 30 May by ATLAS Mauna Loa, observing it at May 30.43-48p3. This detection was confirmed by Great Shefford Obs. (May 30.97-98p4), St. Pardon de Conques Obs. (May 31.01-02p3), Clixby Obs. (May 31.02p3), and ARO Westfield (May 31.19-20p5).

MPEC 2020-K227 - "02:39 UT" - 2020 KA7

K20K07A 2020 KA7 (small asteroid, Earth MOID=9.1 LD, H=25.3 ~29m) was picked up at 0729 UT on 29 May by the Mt. Lemmon Survey (MLS), observing it at May 29.31-32p3. This detection was confirmed by Steward Obs. Mt. Lemmon Station (May 29.40-41p3), Loiano Obs. (May 29.88-89p5 at G=20.6-23.7), Great Shefford Obs. (May 29.98-99p4 & 31.04-06p3), St. Pardon de Conques Obs. (May 29.99p3), Visnjan Obs. (May 30.06-07p4), Farpoint Obs. (May 30.18-19p4), and ARO Westfield (May 30.19-20p3).

Observers on 31 May '20

A total of 32 observers appear in today's MPECs.

Code	Observer / observatory
`349`	Ageo Obs. in Japan, 1 in MPEC 2020-K229 -- 23187
`H21`	Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2020-K227, 2020-K228, 2020-K229 & 2020-K234 -- 2020 KT3, 2020 KL3, 2020 KH7, 2020 KB7, 2020 KB2, 2020 KA7, 2020 JZ2, 2020 HY10, 2020 HJ10, 2135
`T05`	ATLAS Haleakala in Hawaii, 21 in MPEC 2020-K229 -- 2020 FW3, 2010 EC135, 86667, 85275, 85184, 68350, 35107, 333555, 331471, 318050, 159929, 159608, 152756, 145656, 137199, 137170, 136874, 7977, 6569, 4055, 1917
`T08`	ATLAS Mauna Loa in Hawaii, 25 in MPECs 2020-K228 & 2020-K229 -- 2020 KG4, 2020 KB7, 2020 BO5, 2019 UO9, 2005 MR5, 2001 QC34, 99935, 54401, 495891, 428086, 420302, 415711, 369264, 36183, 349063, 19764, 192563, 141078, 137064, 8014, 6050, 5751, 4954, 4179, 3691
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2020-K229 -- 137170
`V06`	Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2020-K229 -- 2016 LY47
`Z99`	Clixby Obs. in England, 4 in MPECs 2020-K228 & 2020-K229 -- 2020 KZ4, 2020 KB7, 2013 XA22, 2010 EC135
`850`	Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2020-K229 -- 2006 BR98
`734`	Farpoint Obs. in Kansas, 1 in MPEC 2020-K227 -- 2020 KA7
`C18`	Frasnes-Lez-Anvaing Obs. in Belgium, 1 in MPEC 2020-K229 -- 2013 XA22
`U76`	Glendora Obs., 1 in MPEC 2020-K229 -- 137199
`J95`	Great Shefford Obs. in England, 3 in MPECs 2020-K227, 2020-K228 & 2020-K229 -- 2020 KB7, 2020 KA7, 2020 BN5
`Z43`	Landehen Obs., 2 in MPEC 2020-K229 -- 477885, 184990
`598`	Loiano Obs. in Italy, 1 in MPEC 2020-K227 -- 2020 KA7
`W92`	MASTER OAFA Obs., 1 in MPEC 2020-K229 -- 8014
`568^`	R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2020-K235 -- 2020 KJ7
`474`	Mt. John Obs. in New Zealand, 13 in MPECs 2020-K229, 2020-K231, 2020-K232 & 2020-K233 -- 2020 KY2, 2020 KV1, 2020 KQ4, 2020 KK3, 2020 KG4, 2020 KE7, 2020 KD7, 2020 KC7, 2020 KC, 2020 HV9, 2020 HT2, 2019 YH4, 2019 PC3
`G96`	Mt. Lemmon Survey in Arizona, 1 in MPEC 2020-K227 -- 2020 KA7
`Z80`	Northolt Branch Obs. in England, 1 in MPEC 2020-K229 -- 2020 KC5
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 14 in MPECs 2020-K229, 2020-K231, 2020-K232, 2020-K233, 2020-K234 & 2020-K235 -- 2020 KJ7, 2020 KH7, 2020 KE7, 2020 KD7, 2020 KC7, 2020 JT, 2020 JL2, 2015 HH10, 68350, 518737, 498550, 228587, 142781, 5751
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 11 in MPECs 2020-K229 & 2020-K235 -- 2020 KR5, 2020 KJ7, 2020 KE2, 2020 JW1, 85184, 68350, 483878, 331471, 144861, 137199, 106589
`V93`	Pin Oak Obs., 8 in MPEC 2020-K229 -- 2013 XA22, 86667, 495615, 184990, 175189, 137199, 136874, 8014
`C95`	SATINO-1 in France, 1 in MPEC 2020-K229 -- 5646
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2020-K229 -- 2020 BN5
`G403`	Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-K229 -- 2020 KQ5
`Y00`	SONEAR in Brazil, 1 in MPEC 2020-K229 -- 144411
`I93`	St. Pardon de Conques Obs. in France, 2 in MPECs 2020-K227 & 2020-K228 -- 2020 KB7, 2020 KA7
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2020-K227 -- 2020 KA7
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-K230 -- 2013 LF1
`L01`	Visnjan Obs. in Croatia, 1 in MPEC 2020-K227 -- 2020 KA7
`I15`	Wishing Star Obs. in Rhode Island, 3 in MPEC 2020-K229 -- 68350, 184990, 137199
`I41`	Zwicky Transient Facility (ZTF) in southern California, 5 in MPEC 2020-K229 -- 2020 FH6, 86067, 54789, 506459, 231792

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

Impact Risk Monitoring on 31 May '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 KC5	NEODyS	2306	2105-2106	2	1.05e-08	-9.45	-9.47	0	NEODyS #2 for the day: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2020-05-26.366 to 2020-05-30.065."
2020 KC5	JPL Sentry	1740	2083-2106	3	1.96446e-05	-6.09	-6.09	0	JPL: Computed at 06:30 today Pacific time based on 44 observations spanning 3.6988 days (2020-May-26.365344 to 2020-May-30.064179). Diameter approximately 0.011 km. from weighted mean H=27.35.

2020 HW7	NEODyS	1740	2044-2117	6	9.81e-07	-6.89	-6.9	0	NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2020-04-26.366 to 2020-04-30.209."

2020 AN3	NEODyS	1740	R E M O V E D						-

2006 BO7	JPL Sentry	1740	2060-2115	4	9.37333e-07	-8.11	-8.30	0	JPL: Computed at 21:21 April 6th of 2017 Pacific time based on 15 observations spanning 1.7435 days (2006-Jan-22.35064 to 2006-Jan-24.094181). Diameter approximately 0.005 km. from weighted mean H=29.31.

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 31 May '20

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

2306	Noted that NEODyS has updated its 2020 KC5 risk assessment - see above
2108	Grabbed MPEC 2020-K231 - 2020 KC7 - see above Grabbed MPEC 2020-K232 - 2020 KD7 - see above Grabbed MPEC 2020-K233 - 2020 KE7 - see above Grabbed MPEC 2020-K234 - 2020 KH7 - see above Grabbed MPEC 2020-K235 - 2020 KJ7 - see above
1740	Noted that JPL Sentry has updated its 2006 BO7 risk assessment - see above Noted that NEODyS has removed 2020 AN3 as an impact risk - see above Noted that NEODyS has updated its 2020 HW7 risk assessment - see above Noted that JPL Sentry has updated its 2020 KC5 risk assessment - see above Noted that NEODyS has updated its 2020 KC5 risk assessment - see above Grabbed MPEC 2020-K228 - 2020 KB7 - see above Grabbed MPEC 2020-K229 - Daily Orbit Update - see above Grabbed MPEC 2020-K230 - 2013 LF1 - see above
0500	Grabbed MPEC 2020-K227 - 2020 KA7 - see above

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