Contents  on 20 June '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 20 June '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 1620 UTC when the database was dated 20 June



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

NEOCP Activity  on 20 June '20

The MPC's NEO Confirmation Page has 33 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 33 objects listed. Of these, seventeen were "one nighters." So far The Tracking News has counted a total of 49 listings on the NEOCP today.

New MPECs  on 20 June '20

Minor Planet Electronic Circulars

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


MPEC 2020-M49 - "18:55 UT" - 2020 MS


MPEC 2020-M48 - "18:54 UT" - 2020 LF2


MPEC 2020-M47 - "18:53 UT" - 2020 LE2


MPEC 2020-M46 - "18:53 UT" - 2020 LD2


MPEC 2020-M45 - "18:52 UT" - 2020 LC2


MPEC 2020-M44 - "12:48 UT" - 2020 LA2


MPEC 2020-M43 - "12:47 UT" - 2020 LZ1


MPEC 2020-M42 - "12:44 UT" - 2020 LY1


MPEC 2020-M41 - "12:43 UT" - 2020 LX1


MPEC 2020-M40 - "12:39 UT" - 2020 MR


<< DOU on 20 June '20 >>  MPEC 2020-M39 - "12:00 UT" - Daily Orbit Update


MPEC 2020-M38 - "01:15 UT" - 2020 MP

Observers  on 20 June '20

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

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 136795
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2020-M38, 2020-M40 & 2020-M49 -- 2020 MS, 2020 MR, 2020 MP
T08ATLAS Mauna Loa in Hawaii, 2 in MPEC 2020-M39 -- 420302, 242450
160Castelmartini Obs. in Italy, 9 in MPEC 2020-M39 -- 2010 EC135, 2005 MR5, 66391, 66251, 477885, 331471, 154278, 137199, 136874
V06Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2020-M47 -- 2020 LE2
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2020-M39 -- 2019 XB2
V16Dark Sky New Mexico Obs. in New Mexico, 1 in MPEC 2020-M39 -- 85275
K87Dettelbach Vineyard Obs. in Germany, 4 in MPEC 2020-M39 -- 2020 LC, 2006 UD63, 2005 MR5, 2004 LU3
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 6 in MPECs 2020-M39, 2020-M40, 2020-M41 & 2020-M44 -- 2020 MR, 2020 ML, 2020 MJ, 2020 LX1, 2020 LG1, 2020 LA2
K83Forti Obs., 4 in MPEC 2020-M39 -- 2006 HB, 2004 LU3, 85275, 163348
J95Great Shefford Obs. in England, 1 in MPEC 2020-M39 -- 385580
V20Killer Rocks Obs., 1 in MPEC 2020-M39 -- 2010 JV153
K38M57 Obs. in Italy, 3 in MPEC 2020-M39 -- 2015 FP332, 2010 JV153, 2010 EC135
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2020-M39 -- 1999 DB2
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2020-M39 -- 2014 GK1
568^R. Wainscoat on Mauna Kea in Hawaii, 9 in MPECs 2020-M38, 2020-M41, 2020-M42, 2020-M43, 2020-M44, 2020-M46, 2020-M47, 2020-M48 & 2020-M49 -- 2020 MS, 2020 MP, 2020 LZ1, 2020 LY1, 2020 LX1, 2020 LF2, 2020 LE2, 2020 LD2, 2020 LA2
V01Mountainville Obs. in Utah, 1 in MPEC 2020-M39 -- 2020 MK
474Mt. John Obs. in New Zealand, 13 in MPECs 2020-M39, 2020-M41, 2020-M43, 2020-M44 & 2020-M46 -- 2020 LZ1, 2020 LX1, 2020 LX, 2020 LR, 2020 LM, 2020 LD2, 2020 LD1, 2020 LA2, 2020 KR6, 2020 KE5, 2020 KD2, 2019 AN5, 2017 UX44
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2020-M39 -- 438908, 106538
F51Pan-STARRS 1 (PS1) in Hawaii, 14 in MPECs 2020-M38, 2020-M39, 2020-M40, 2020-M41, 2020-M42, 2020-M43, 2020-M44, 2020-M46, 2020-M47, 2020-M48 & 2020-M49 -- 2020 MS, 2020 MR, 2020 MP, 2020 LZ1, 2020 LY1, 2020 LX1, 2020 LF2, 2020 LE2, 2020 LD2, 2020 LA2, 2008 QV11, 490684, 425450, 3752
F52Pan-STARRS 2 (PS2) in Hawaii, 10 in MPECs 2020-M38, 2020-M39 & 2020-M40 -- 2020 MR, 2020 MP, 2020 FW3, 2020 BO5, 2017 MW7, 2015 HH10, 87311, 354952, 218863, 6050
L68PESCOPE, 2 in MPEC 2020-M39 -- 169675, 6569
654Pomona College Table Mtn. Obs. (PCTMO) in southern California, 3 in MPEC 2020-M39 -- 68950, 326777, 257744
434San Benedetto Po Obs. in Italy, 1 in MPEC 2020-M39 -- 144411
104San Marcello Pistoiese Obs. in Italy, 3 in MPEC 2020-M39 -- 2020 ME, 2020 JU, 136874
C95SATINO-1 in France, 1 in MPEC 2020-M39 -- 10115
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-M39 -- 2020 HH6
G40-program code "-" (22) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-M39 -- 2020 MK
858Tebbutt Obs. in New Mexico, 1 in MPEC 2020-M42 -- 2020 LY1
I76Tesla Obs. in Spain, 2 in MPEC 2020-M39 -- 2015 FP332, 2005 MR5
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2020-M45 -- 2020 LC2
L01Visnjan Obs. in Croatia, 1 in MPEC 2020-M49 -- 2020 MS
C51WISE in Earth polar orbit, 2 in MPECs 2020-M39 & 2020-M45 -- 2020 LC2, 2016 FY14
I41Zwicky Transient Facility (ZTF) in southern California, 2 in MPEC 2020-M39 -- 16834, 433
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 June '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 MLJPL Sentry1620R E M O V E DJPL: Risk listing removed at 1406 UTC today
NEODyS1704207914.18e-11-11.15-11.150NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2020-06-17.464 to 2020-06-19.986."
2020 MJNEODyS17042077-2109577.48e-05-4.29-4.520NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2020-06-17.326 to 2020-06-19.944."
JPL Sentry16202086-2109326.11873465e-05-4.35-4.640JPL: Computed at 07:04 today Pacific time based on 16 observations spanning 2.6171 days (2020-Jun-17.325688 to 2020-Jun-19.94279). Diameter approximately 0.031 km. from weighted mean H=25.18.
2020 LG1JPL Sentry1620R E M O V E DJPL: Risk listing removed at 1358 UTC today
NEODyS1704209118.1e-08-4.83-4.830NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2020-06-01.557 to 2020-06-20.146."
443104 (2013 XK22)JPL Sentry16202101-210111.427e-06-5.80-5.800JPL: Computed at 22:01 April 18th of 2017 Pacific time based on 99 observations spanning 958.62 days (2013-Dec-14.43128 to 2016-Jul-30.048786). Diameter approximately 0.050 km. from weighted mean H=24.16.
2011 MXJPL Sentry16202070-2086219.34395596e-05-5.02-5.340JPL: Computed at 11:27 April 10th of 2017 Pacific time based on 23 observations spanning 4.0260 days (2011-Jun-23.32845 to 2011-Jun-27.35447). Diameter approximately 0.014 km. from weighted mean H=26.91.

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 20 June '20

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

2010Grabbed MPEC 2020-M45 - 2020 LC2 - see above
Grabbed MPEC 2020-M46 - 2020 LD2 - see above
Grabbed MPEC 2020-M47 - 2020 LE2 - see above
Grabbed MPEC 2020-M48 - 2020 LF2 - see above
Grabbed MPEC 2020-M49 - 2020 MS - see above
1704Noted that NEODyS has updated its 2020 LG1 risk assessment - see above
Noted that NEODyS has updated its 2020 MJ risk assessment - see above
Noted that NEODyS has updated its 2020 ML risk assessment - see above
1620Noted that JPL Sentry has updated its 2011 MX risk assessment - see above
Noted that JPL Sentry has updated its 443104 (2013 XK22) risk assessment - see above
Noted that JPL Sentry has removed 2020 LG1 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 MJ risk assessment - see above
Noted that JPL Sentry has removed 2020 ML as an impact risk - see above
Grabbed MPEC 2020-M39 - Daily Orbit Update - see above
Grabbed MPEC 2020-M40 - 2020 MR - see above
Grabbed MPEC 2020-M41 - 2020 LX1 - see above
Grabbed MPEC 2020-M42 - 2020 LY1 - see above
Grabbed MPEC 2020-M43 - 2020 LZ1 - see above
Grabbed MPEC 2020-M44 - 2020 LA2 - see above
Noted Radar Astrometry database update - see above
0400Grabbed MPEC 2020-M38 - 2020 MP - see above