Contents  on 15 May '09


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 15 May '09

The MPC's NEO Confirmation Page has 3 listings: 2 new, 1 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and one updated listings. All of these were "one nighters."

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 15 May '09

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 15 May '09 >>  MPEC 2009-J60 - "06:06 UT" - Daily Orbit Update

Observers  on 15 May '09

Eleven observing facilities appear in today's MPEC.

CodeObserver / observatory
703Catalina Sky Survey (CSS) in Arizona, 8 in MPEC 2009-J60 -- 2009 HD82, 2009 CR2, 35107, 25916, 184990, 177614, 152931, 5332
448Desert Moon Obs. in New Mexico, 3 in MPEC 2009-J60 -- 2009 JG1, 2009 HV77, 2001 FA1
I21El Condor Obs. in Argentina, 3 in MPEC 2009-J60 -- 207945, 143651, 1036
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2009-J60 -- 2009 JM2
J87La Canada Obs. in Spain, 1 in MPEC 2009-J60 -- 2009 HC82
B76Schonfeld Obs. in Germany, 1 in MPEC 2009-J60 -- 143651
D21Shenton Park Obs. in Western Australia, 3 in MPEC 2009-J60 -- 2009 JR, 2009 JG2, 2009 DE47
B40Skylive Obs. in Italy, 2 in MPEC 2009-J60 -- 2009 HV44, 2009 HD82
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2009-J60 -- 2009 JL1, 2009 JG2, 2003 HF2, 99799, 90367
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2009-J60 -- 2009 JL1, 2009 HY51, 2009 HV58, 2009 HF88, 2009 HD82, 2009 HC, 2009 FF19, 2006 WH1
G56Walnut Creek Obs. in northern California, 2 in MPEC 2009-J60 -- 2009 HV44, 2009 CQ1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 May '09

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. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few 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
2009 HCJPL Sentry13202095-209961.5e-06-6.20-6.700JPL: "Analysis based on 123 observations spanning 27.990 days (2009-Apr-17.23164 to 2009-May-15.22198)." Diameter approximately 0.037 km. from mean, weighted H=24.8.
NEODyS1320R E M O V E D-

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 15 May '09

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

1320Noted that JPL Sentry has updated its 2009 HC risk assessment - see above
Noted that NEODyS has removed 2009 HC as an impact risk - see above
Grabbed MPEC 2009-J60 - Daily Orbit Update - see above
Noted that the NEOCP has become active