Contents  on 10 June '19

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.

Traffic Report  on 10 June '19

Seven objects reported inside ten LD

2358 UTC update: The Minor Planet Center has issued one MPEC today, a DOU MPEC. As we haven't finished processing that new data, there will be no regular traffic report today.


The Minor Planet Center Status page reports:

Disk Failure at CDP
2019 June 10: 15.00 -- A failure of the cooling system in the computer room at CDP this past Wednesday evening caused a disk failure on a machine that handles several observation processing pipelines. We have recovered the disk contents from backup and are working to restore affected services. We expect to resume publication of DOU MPECs and related data products within the next few hours, with other MPECs to soon follow. We apologize for this major disruption and will update this status page as services are restored.


This special traffic report was generated at 1557 UTC.

Note: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's gravitational sphere of influence (SOI), which has a radius of about 2.41 LD from Earth's center.

NEOCP Activity  on 10 June '19

The MPC's NEO Confirmation Page has 184 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 184 objects listed. Of these, 36 were "one nighters." So far The Tracking News has counted a total of 189 listings on the NEOCP today.

New MPECs  on 10 June '19

Minor Planet Electronic Circulars

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


<< DOU on 10 June '19 >>  MPEC 2019-L87 - "16:43 UT" - Daily Orbit Update

Observers  on 10 June '19

A total of 37 observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPEC 2019-L87 -- 2019 JA1, 2019 HC, 2019 GL1, 2019 GD3, 2019 FH, 2017 SY32, 2016 KR3, 2006 FJ
T05ATLAS Haleakala in Hawaii, 2 in MPEC 2019-L87 -- 2008 KV2, 533671
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2019-L87 -- 533671
073Bucharest Obs. in Romania, 1 in MPEC 2019-L87 -- 66391
160Castelmartini Obs. in Italy, 6 in MPEC 2019-L87 -- 2019 KZ3, 85989, 257744, 162181, 143947, 6178
703Catalina Sky Survey (CSS) in Arizona, 8 in MPEC 2019-L87 -- 2019 JX7, 2019 JL3, 2019 HC, 2019 FP2, 2018 XG5, 2015 QO3, 2006 UB64, 533671
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPEC 2019-L87 -- 2019 JN1, 2019 JE1, 2019 HK4, 2019 HG3, 2019 GT3, 2019 GS3, 2019 GP5, 2019 FM2, 2018 XQ4, 2018 TX4
W84!program code "!" (10) via DECam in Chile, 2 in MPEC 2019-L87 -- 2017 QQ32, 2015 ED7
K87Dettelbach Vineyard Obs. in Germany, 3 in MPEC 2019-L87 -- 2019 LT, 2019 KZ3, 2019 JX7
L19Felsina AAB Obs., 2 in MPEC 2019-L87 -- 2019 JX7, 66391
157Frasso Sabino Obs. in Italy, 1 in MPEC 2019-L87 -- 494999
K88GINOP-KHK in Hungary, 1 in MPEC 2019-L87 -- 2019 JX7
238Grorudalen Obs. in Norway, 1 in MPEC 2019-L87 -- 12538
A17Guidestar Obs. in Germany, 4 in MPEC 2019-L87 -- 2019 HC, 2019 FP2, 2019 BJ5, 2011 LH
246KLENOT in the Czech Republic, 4 in MPEC 2019-L87 -- 2019 LA, 2019 KZ3, 2019 KA4, 2018 XG5
Z22MASTER IAC Obs. in the Canary Islands, 2 in MPEC 2019-L87 -- 2019 HC, 257744
108Montelupo Obs. in Italy, 2 in MPEC 2019-L87 -- 2019 KZ3, 2019 JX7
474Mt. John Obs. in New Zealand, 7 in MPEC 2019-L87 -- 2019 LA, 2019 KY, 2019 KK5, 2019 KK4, 2019 KH, 2019 JN1, 2018 TX4
G96Mt. Lemmon Survey (MLS) in Arizona, 20 in MPEC 2019-L87 -- 2019 LB, 2019 KP, 2019 JY4, 2019 JX7, 2019 JD6, 2019 GJ5, 2019 GD3, 2019 GB4, 2018 XC2, 2017 AN19, 2015 XP129, 2014 AA33, 2013 LK7, 2012 LK2, 2009 DL1, 2009 AH16, 2006 UB64, 2005 GK, 533671, 531898
Z80Northolt Branch Obs. in England, 3 in MPEC 2019-L87 -- 2019 JX7, 2019 GD3, 66391
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2019-L87 -- 66391
F51Pan-STARRS 1 (PS1) in Hawaii, 19 in MPEC 2019-L87 -- 2019 LV, 2019 KY, 2019 KN, 2019 KL2, 2019 JZ4, 2019 JY6, 2019 JL1, 2019 JF2, 2019 GN19, 2017 GB8, 2016 RG20, 2016 PY66, 2016 LM48, 2015 MN66, 2014 EA49, 2012 LT7, 2012 KA4, 2012 BD124, 2009 AH16
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2019-L87 -- 2019 FG1
K80Platanus Obs., 1 in MPEC 2019-L87 -- 2019 KZ3
L18QOS Obs., 1 in MPEC 2019-L87 -- 2019 JX7
C95SATINO-1 in France, 3 in MPEC 2019-L87 -- 2019 DB, 2019 CO5, 2019 CD5
645Sloan Digital Sky Survey in New Mexico, 1 in MPEC 2019-L87 -- 510529
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-L87 -- 68347
G40,program code "," (21) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-L87 -- 2019 HC
G40-program code "-" (22) via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPEC 2019-L87 -- 2019 KW3, 2019 GD3
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-L87 -- 2019 LB
691Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2019-L87 -- 2019 JY4, 2019 JX7, 2019 HK4, 2018 YA3, 2016 NH15, 2015 QO3, 2014 MC55
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2019-L87 -- 2019 KB4, 2019 JD6, 2013 LG16
L39Spica Obs., 1 in MPEC 2019-L87 -- 12538
I52Steward Obs. Mt. Lemmon Station in Arizona, 25 in MPEC 2019-L87 -- 2019 LX, 2019 LT, 2019 LS, 2019 LP, 2019 LC, 2019 LA, 2019 KZ3, 2019 KW3, 2019 KU3, 2019 KR, 2019 KK4, 2019 KK3, 2019 KK, 2019 KH3, 2019 KH2, 2019 KG1, 2019 KE3, 2019 KD2, 2019 KB4, 2019 KA4, 2019 JS2, 2019 JE6, 2019 GP5, 2018 NP1, 2018 MR8
954Teide Obs. in the Canary Islands, 1 in MPEC 2019-L87 -- 2019 HC
A16Tentlingen Obs. in Switzerland, 2 in MPEC 2019-L87 -- 163696, 1980
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 7 in MPEC 2019-L87 -- 2019 KJ4, 2019 JR7, 2019 JF1, 2019 HM, 2019 GF4, 2018 XZ1, 2018 UQ1
I15Wishing Star Obs. in Rhode Island, 6 in MPEC 2019-L87 -- 2019 JX7, 68950, 453778, 244670, 162181, 7889
I41Zwicky Transient Facility (ZTF) in southern California, 21 in MPEC 2019-L87 -- 2019 JY4, 2019 JW2, 2019 JT7, 2019 HC, 2019 GR21, 2018 LM4, 2018 JB3, 2017 YT5, 2016 AU130, 2015 FU332, 2009 OB3, 2009 DL1, 87309, 441825, 376775, 355256, 18736, 162082, 5869, 5332, 2059
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 June '19

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
2019 KJ4JPL Sentry20362059-2118878.59697201e-05-5.46-6.280JPL: Computed at 13:31 today Pacific time based on 28 observations spanning 7.9430 days (2019-May-31.318726 to 2019-Jun-08.261769). Diameter approximately 0.012 km. from weighted mean H=27.22.
2019 JR7JPL Sentry20042067-206719.844e-10-7.38-7.380JPL: Computed at 12:48 today Pacific time based on 38 observations spanning 28.655 days (2019-May-07.92534 to 2019-Jun-05.580828). Diameter approximately 0.130 km. from weighted mean H=22.07.

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 10 June '19

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

2036Noted that JPL Sentry has updated its 2019 KJ4 risk assessment - see above
2004Noted that JPL Sentry has updated its 2019 JR7 risk assessment - see above
1731Grabbed MPEC 2019-L87 - Daily Orbit Update - see above
1557Generated Traffic Report