Contents on 3 June '20
- IAU Minor Planet Center
- Observers -- thirteen observers
- Impact Risk Monitoring -- four objects
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 1148 risk-listed objects, 882 have had news in the last 31 days. Updated at 1612 UTC on 3 June.
- 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)
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 3 June '20
The MPC's NEO Confirmation Page has 37 listings
When last checked at 2300 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 37 objects listed. Of these, 26 were "one nighters." So far The Tracking News has counted a total of 42 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 3 June '20
Minor Planet Electronic Circulars
As of last check at 2300 UTC, there have been eight MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2020-L10 time-stamped "11:27 UT" - 2019 VS7 - see below
- MPEC 2020-L11 time-stamped "12:00 UT" - Daily Orbit Update - see below
- MPEC 2020-L12 time-stamped "14:16 UT" - 2020 LA - see below
- MPEC 2020-L13 time-stamped "15:00 UT" - 2017 VX1 - see below
- MPEC 2020-L14 time-stamped "20:58 UT" - 2017 FE173 - see below
- MPEC 2020-L15 time-stamped "21:43 UT" - 2016 GZ276 - see below
- MPEC 2020-L16 time-stamped "22:06 UT" - 2016 TN120 - see below
- MPEC 2020-L17 time-stamped "22:16 UT" - 2016 TO120
MPEC 2020-L17 - "22:16 UT" - 2016 TO120
- K16TC0O 2016 TO120 (q=39.907 AU, Q=79.628 AU, H=7.34 ~115 km) was picked up at 0519 UT on 6 Oct. 2016 by Scott Sheppard via Cerro Tololo Inter-American Obs. (CTIO), observing it at 2016 Oct. 6.22p1 at r=24.7, 2016 Oct. 6.35p1 at r=25.1, and 2016 Oct. 7.30p1 at r=25.0. This detection was confirmed by program code "." (23) via Las Campanas Obs. (2016 Nov. 2.15p1, 2016 Nov. 3.09p1, 2016 Dec. 30.09p1, 2016 Dec. 30.17p1, 2017 Dec. 16.12p1 & 2017 Dec. 17.13p1).
MPEC 2020-L16 - "22:06 UT" - 2016 TN120
- K16TC0N 2016 TN120 (q=43.220 AU, Q=61.893 AU, H=6.42 ~176 km) was picked up at 0721 UT on 6 Oct. 2016 by Sheppard/CTIO, observing it at 2016 Oct. 6.31p1 at r=24.3 and 2016 Oct. 7.26p1 at r=24.1. This detection was confirmed by Las Campanas Obs./code "." (23) (2016 Nov. 2.14p1, 2016 Nov. 3.08p1, 2016 Dec. 30.07p1, 2016 Dec. 30.15p1, 2017 Oct. 18.25p1 at r=24.0, 2017 Oct. 18.32p1 at r=23.9, 2017 Dec. 13.07p1, 2017 Dec. 13.18p1 & 2017 Dec. 14.06p1).
MPEC 2020-L15 - "21:43 UT" - 2016 GZ276
- K16GR6Z 2016 GZ276 (q=38.928 AU, Q=252.240 AU) was picked up at 0809 UT on 10 April 2016 by Scott Sheppard on Mauna Kea, observing it at 2016 April 10.34p1 at r=25.2, 2016 April 10.45p1 at r=25.1, and 2016 June 4.38-41p2 at r=25.2. This detection was confirmed by program code 5 via Las Campanas Obs. (2017 April 22.30p1 at r=25.4, 2017 April 23.21p1 at r=25.1, 2017 April 23.27p1 at r=25.1, 2017 April 23.32p1 at r=25.2, 2018 March 11.31-32p2 at r=25.2, 2018 March 11.37p1, 2018 March 12.34-37p2, 2018 May 17.11p1 at r=25.2 & 2018 May 19.22p1 at r=25.1).
MPEC 2020-L14 - "20:58 UT" - 2017 FE173
- K17FH3E 2017 FE173 (q=42.088 AU, Q=172.722 AU) was picked up at 0716 UT on 23 March 2017 by Sheppard/CTIO, observing it at 2017 March 23.30p1 at r=24.0, 2017 March 24.24p1 at r=24.0, and 2017 March 24.33p1 at r=23.9. This detection was confirmed by Discovery Channel Telescope (DCT) (2017 May 20.25p1, 2017 May 20.30p1 & 2018 May 14.27-29p2) and Las Campanas Obs./code "." (23) (2018 March 11.36-40p2 at r=23.9, 2018 March 12.36-40p4, 2019 Feb. 28.34p1 at r=23.9 & 2019 March 1.35p1 at r=23.9).
MPEC 2020-L13 - "15:00 UT" - 2017 VX1
- K17V01X 2017 VX1 (H=20.1 ~323m) from UH/Tholen NEO Follow-Up 2.24m Telescope (2019 Aug. 27.43p1 at G=24.72 & 2019 Aug. 28.35-38p3 at G=24.30-72)
MPEC 2020-L12 - "14:16 UT" - 2020 LA
- K20L00A 2020 LA (Earth MOID=1.1 LD, H=25.4 ~28m) was picked up at 0837 UT on 1 June by the Mt. Lemmon Survey (MLS), observing it at June 1.36-37p3, 1.44p3, and 2.38p3. This detection was confirmed by Great Shefford Obs. (June 1.93-96p2), Visnjan Obs. (June 1.95-97p5 & 3.05-07p3), and Astronomical Research Obs. Westfield (June 3.24-27p5).
- Observations of risk-listed objects
- K20K03N 2020 KN3 (Q=5.221 AU, arc=16 days, H=19.6 ~407m) from Steward Obs. Mt. Lemmon Station (June 3.39p4)
- K20K02N 2020 KN2 (close passer) from Steward Mt. Lemmon Sta. (June 3.38p2)
- Observations of recently (no longer) risk-listed objects
- K20K03O 2020 KO3 (arc=15 days, H=20.1 ~323m) from Steward Mt. Lemmon Sta. (June 3.42-43p4)
- K20J00U 2020 JU (arc=28 days, H=21.0 ~214m, NHATS target) from Steward Mt. Lemmon Sta. (June 3.43p4)
- Observations of close-passing objects
- K20K07B 2020 KB7 (arc=4 days, H=27.6 ~10m, NHATS target) from Steward Mt. Lemmon Sta. (June 3.26-27p4)
- K20K04Z 2020 KZ4 from Steward Mt. Lemmon Sta. (June 3.33p3)
- K20K03Z 2020 KZ3 (arc=12 days, H=26.2 ~19m, NHATS target) from Steward Mt. Lemmon Sta. (June 3.37-38p4)
- Observation campaigns (NHATS targets, radar support)
- K20K05R 2020 KR5 (arc=9 days, H=22.3 ~117m, NHATS) from Steward Mt. Lemmon Sta. (June 3.34p3)
- K20K04D 2020 KD4 (arc=37 days, H=26.2 ~19m, NHATS) from Steward Mt. Lemmon Sta. (June 3.45p4)
- K20J01U 2020 JU1 (arc=20 days, H=24.2 ~49m, NHATS) from Steward Mt. Lemmon Sta. (June 3.33p3)
-- NHATS target table
- Observations of small asteroids (H>22.0)
- K20K07A 2020 KA7 (arc=5 days, H=25.3 ~29m) from Steward Mt. Lemmon Sta. (June 3.29-30p3)
- K20K06S 2020 KS6 (i=49.0°, Q=4.119 AU, arc=6 days, H=22.7 ~98m) from Steward Mt. Lemmon Sta. (June 3.27p3)
- K20K04G 2020 KG4 (Q=4.595 AU, arc=11 days, H=25.0 ~34m) from Steward Mt. Lemmon Sta. (June 3.32p4)
- K20K01R 2020 KR1 (arc=17 days, H=24.6 ~41m) from Steward Mt. Lemmon Sta. (June 3.40-41p4)
- K20K01O 2020 KO1 (arc=22 days, H=24.9 ~35m) from Steward Mt. Lemmon Sta. (June 3.33-34p3)
- K20J00X 2020 JX (arc=22 days, H=23.8 ~59m) from Steward Mt. Lemmon Sta. (June 3.43-44p2)
- K20H01V 2020 HV1 (arc=46 days, H=22.5 ~107m) from Steward Mt. Lemmon Sta. (June 3.44-45p3)
- Observations of other objects
- K20K05Z 2020 KZ5 (arc=8 days, H=20.4 ~282m) from Steward Mt. Lemmon Sta. (June 3.46p4)
- K20K04N 2020 KN4 (arc=10 days, H=21.4 ~178m) from Steward Mt. Lemmon Sta. (June 3.32p4)
- 06050 6050 Miwablock (1992 AE) from SATINO-1 (2019 March 16.91-94p4)
MPEC 2020-L10 - "11:27 UT" - 2019 VS7
- K19V07S 2019 VS7 (Q=4.116 AU, H=18.7 ~616m) was picked up at 1225 UT on 3 Nov. 2019 by Pan-STARRS 1 (PS1), observing it at 2016 Jan. 9.22-25p4 at G=22.4-23.2, 2019 Nov. 3.50-53p3 at w=21.7-22.38, 2019 Nov. 9.44-45p2 at G=21.9-22.2, 2019 Nov. 28.37p1 at G=21.4, and 2019 Dec. 30.30-32p3 at G=21.5-9. This detection was confirmed by MLS (May 28.15-18p7 & 29.15p3), Xingming Obs. #3 (May 28.69p2), and Steward Mt. Lemmon Sta. (May 29.15p3 & June 3.15-16p3).
Observers on 3 June '20
Thirteen observers appear in today's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2020-L12 -- 2020 LA|
|807.||Scott Sheppard via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2020-L14, 2020-L16 & 2020-L17 -- 2017 FE173, 2016 TO120, 2016 TN120|
|G37||Discovery Channel Telescope in Arizona, 1 in MPEC 2020-L14 -- 2017 FE173|
|J95||Great Shefford Obs. in England, 1 in MPEC 2020-L12 -- 2020 LA|
|304.||program code "." (23) via Las Campanas Obs. in Chile, 3 in MPECs 2020-L14, 2020-L16 & 2020-L17 -- 2017 FE173, 2016 TO120, 2016 TN120|
|3045||program code 5 via Las Campanas Obs. in Chile, 1 in MPEC 2020-L15 -- 2016 GZ276|
|5685||Scott Sheppard on Mauna Kea in Hawaii, 1 in MPEC 2020-L15 -- 2016 GZ276|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2020-L10 & 2020-L12 -- 2020 LA, 2019 VS7|
|F51||Pan-STARRS 1 in Hawaii, 1 in MPEC 2020-L10 -- 2019 VS7|
|C95||SATINO-1 in France, 1 in MPEC 2020-L11 -- 6050|
|I52||Steward Obs. Mt. Lemmon Station in Arizona, 20 in MPECs 2020-L10 & 2020-L11 -- 2020 KZ5, 2020 KZ4, 2020 KZ3, 2020 KS6, 2020 KR5, 2020 KR1, 2020 KO3, 2020 KO1, 2020 KN4, 2020 KN3, 2020 KN2, 2020 KG4, 2020 KD4, 2020 KB7, 2020 KA7, 2020 JX, 2020 JU1, 2020 JU, 2020 HV1, 2019 VS7|
|T12||UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-L13 -- 2017 VX1|
|L01||Visnjan Obs. in Croatia, 1 in MPEC 2020-L12 -- 2020 LA|
|N88||Xingming Obs. #3, 1 in MPEC 2020-L10 -- 2019 VS7|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 3 June '20
Notes for Today's Latest Risk Assessments
|2020 KN3||NEODyS||1610||R E M O V E D||-|
|2020 KN2||JPL Sentry||1610||2063-2117||11||3.217026e-05||-5.22||-5.23||0||JPL: Computed at 06:31 today Pacific time based on 72 observations spanning 13.971 days (2020-May-20.412007 to 2020-Jun-03.38263). Diameter approximately 0.018 km. from weighted mean H=26.36.|
|NEODyS||1610||2063-2116||19||3.13e-05||-5.24||-5.25||0||NEODyS: "Based on 74 optical observations (of which 2 are rejected as outliers) from 2020-05-20.413 to 2020-06-03.383."|
|2014 LY21||JPL Sentry||1610||2020-2116||971||8.37667120999998e-05||-4.92||-5.12||0||JPL: Computed at 18:09 April 8th of 2017 Pacific time based on 11 observations spanning .04506 days (2014-Jun-02.41612 to 2014-Jun-02.46118). Diameter approximately 0.005 km. from weighted mean H=29.25.|
|2008 KO||JPL Sentry||1610||2049-2061||3||7.7813e-07||-5.29||-5.61||0||JPL: Computed at 11:32 April 10th of 2017 Pacific time based on 44 observations spanning 3.8882 days (2008-May-27.3758 to 2008-May-31.26395). Diameter approximately 0.045 km. from weighted mean H=24.40.|
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 3 June '20
Times are UTC for when items were noted or added by The Tracking News.
|2300||Grabbed MPEC 2020-L16 - 2016 TN120 - see above|
Grabbed MPEC 2020-L17 - 2016 TO120 - see above
|2201||Grabbed MPEC 2020-L14 - 2017 FE173 - see above|
Grabbed MPEC 2020-L15 - 2016 GZ276 - see above
|1610||Noted that JPL Sentry has updated its 2008 KO risk assessment - see above|
Noted that JPL Sentry has updated its 2014 LY21 risk assessment - see above
Noted that JPL Sentry has updated its 2020 KN2 risk assessment - see above
Noted that NEODyS has updated its 2020 KN2 risk assessment - see above
Noted that NEODyS has removed 2020 KN3 as an impact risk - see above
Grabbed MPEC 2020-L10 - 2019 VS7 - see above
Grabbed MPEC 2020-L11 - Daily Orbit Update - see above
Grabbed MPEC 2020-L12 - 2020 LA - see above
Grabbed MPEC 2020-L13 - 2017 VX1 - see above