Contents  on 31 May '10


The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

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. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.

NEOCP Activity  on 31 May '10

The MPC's NEO Confirmation Page has 12 listings: 7 new, 5 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven new and five updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of fourteen listings on the NEOCP at some point 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 '10

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. No Daily Orbit Update DOU MPEC has been posted yet, so visit the MPC Status Page for possible explanation and check the MPC Mirror Page for alternate access to key pages, maybe including new MPECs. (The MPC Status Page reported today that "Last night's DOU MPEC has been abandoned as a result of a system failure overnight.")

MPEC 2010-K76 - "01:37 UT" - 2010 KB61

Observers  on 31 May '10

Three observing facilities appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2010-K76 -- 2010 KB61
J95Great Shefford Obs. in England, 1 in MPEC 2010-K76 -- 2010 KB61
C51WISE in Earth polar orbit, 1 in MPEC 2010-K76 -- 2010 KB61
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 31 May '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL 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 is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.





Notes for Today's Latest Risk Assessments
2010 KU10NEODyS1457R E M O V E D-
JPL Sentry0104R E M O V E DJPL: Risk listing removed at 0050 UTC.
2010 KR10NEODyS1457R E M O V E D-
JPL Sentry0104R E M O V E DJPL: Risk listing removed at 0054 UTC.
153814 2001 WN5NEODyS14572106-212253.97e-10-6.47-6.770NEODyS: "Based on 202 optical observations (of which 4 are rejected as outliers) from 1996/02/10.397 to 2010/05/29.194."

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

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 '10

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

1457Noted that NEODyS has updated its 153814 2001 WN5 risk assessment - see above
Noted that NEODyS has removed 2010 KR10 as an impact risk - see above
Noted that NEODyS has removed 2010 KU10 as an impact risk - see above
0537Grabbed MPEC 2010-K76 - 2010 KB61 - see above
0104Noted that JPL Sentry has removed 2010 KR10 as an impact risk - see above
Noted that JPL Sentry has removed 2010 KU10 as an impact risk - see above