Contents  on 17 May '09

Note: These A/CC news pages may not update again today, Sunday, May 17th, until after midnight UTC.


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 17 May '09

The MPC's NEO Confirmation Page has 13 listings: 1 new, 12 updated

When last checked at 2155 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and twelve updated listings. Of these, six 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 17 May '09

Minor Planet Electronic Circulars

As of last check at 2155 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 17 May '09 >>  MPEC 2009-K03 - "06:06 UT" - Daily Orbit Update

Observers  on 17 May '09

Fourteen observing facilities appear in today's MPEC.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2009-K03 -- 207945
B88Bigmuskie Obs. in Italy, 2 in MPEC 2009-K03 -- 213869, 212546
703Catalina Sky Survey (CSS) in Arizona, 4 in MPEC 2009-K03 -- 211871, 162900, 138883, 5693
448Desert Moon Obs. in New Mexico, 1 in MPEC 2009-K03 -- 2000 EL26
B33Libbiano Obs. in Italy, 1 in MPEC 2009-K03 -- 143651
560Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2009-K03 -- 2009 JG2, 2009 HD82, 2009 CQ1
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2009-K03 -- 2009 HL21, 2005 SA71, 5869
A13Naef Obs. in Switzerland, 3 in MPEC 2009-K03 -- 2009 JK1, 2009 EQ2, 2000 KN44
J53Posadas Obs. in Spain, 2 in MPEC 2009-K03 -- 207945, 143651
204Schiaparelli Obs. in Italy, 3 in MPEC 2009-K03 -- 2009 HU44, 2009 HM82, 2009 CR2
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-K03 -- 214088
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2009-K03 -- 2009 HC, 2009 FH44, 2005 MO13
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-K03 -- 2009 HV67
198Wildberg Obs. in Germany, 3 in MPEC 2009-K03 -- 2009 JG2, 2009 HV44, 2009 HD82
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 May '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2155 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 Sentry15202095-209961.2e-06-6.31-6.660JPL: "Analysis based on 130 observations spanning 29.164 days (2009-Apr-17.23164 to 2009-May-16.39531)." Diameter approximately 0.037 km. from mean, weighted H=24.8.
NEODyS15202079-209022.21e-08-7.96-8.160NEODyS: "Based on 132 optical observations (of which 2 are rejected as outliers) from 2009/04/17.232 to 2009/05/16.396."

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 17 May '09

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

1520Noted that JPL Sentry has updated its 2009 HC risk assessment - see above
Noted that NEODyS has reposted 2009 HC as an impact risk - see above
Grabbed MPEC 2009-K03 - Daily Orbit Update - see above