Contents  on 16 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 16 May '09

The MPC's NEO Confirmation Page has 9 listings: 4 new, 5 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and five updated listings. Of these, five 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 16 May '09

Minor Planet Electronic Circulars

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

MPEC 2009-K02 - "15:39 UT" - 2001 SL264

<< DOU on 16 May '09 >>  MPEC 2009-K01 - "06:06 UT" - Daily Orbit Update

Observers  on 16 May '09

Sixteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 12 in MPEC 2009-K01 -- 2009 JR2, 2009 HZ67, 2009 HM73, 2009 HK73, 2009 HG, 2009 HE, 2009 FY29, 2009 DG9, 2009 DD1, 2009 BM2, 2008 WM64, 2004 XP164
432Boambee Obs. in New South Wales, 6 in MPEC 2009-K01 -- 2005 SG19, 18882, 108519, 5604, 5011, 3552
703Catalina Sky Survey (CSS) in Arizona, 7 in MPEC 2009-K01 -- 2009 JK1, 2009 HV2, 1998 UN1, 214088, 15745, 5011, 719
I21El Condor Obs. in Argentina, 3 in MPEC 2009-K01 -- 2001 SG286, 207945, 136617
J28Jaen Obs. in Spain, 1 in MPEC 2009-K01 -- 7822
699LONEOS in Arizona, 1 in MPEC 2009-K02 -- 2001 SL264
J87La Canada Obs. in Spain, 1 in MPEC 2009-K01 -- 2009 HC82
J75La Sagra Obs. in Spain, 2 in MPEC 2009-K01 -- 2009 JG1, 2009 HV77
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2009-K01 -- 2009 HC
152Moletai Obs. in Lithuania, 1 in MPEC 2009-K01 -- 2009 DF1
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2009-K01 -- 2009 JO2, 2003 UN12, 4179
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2009-K02 -- 2001 SL264
D21Shenton Park Obs. in Western Australia, 4 in MPEC 2009-K01 -- 2009 JG2, 2009 DL1, 2009 CQ1, 2008 WN2
E12Siding Spring Survey (SSS) in New South Wales, 14 in MPEC 2009-K01 -- 2009 HB82, 2008 SV11, 2004 KT, 2004 FU64, 2002 NW16, 2001 SG286, 85867, 20826, 207945, 155334, 143947, 4954, 3988, 3199
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-K01 -- 142781
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2009-K01 -- 2009 HM73
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 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 Sentry14432097-209958.4e-07-6.46-6.920JPL: "Analysis based on 127 observations spanning 28.061 days (2009-Apr-17.23164 to 2009-May-15.29251)." Diameter approximately 0.037 km. from mean, weighted H=24.8.

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 16 May '09

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

1606Grabbed MPEC 2009-K02 - 2001 SL264 - see above
1443Noted that JPL Sentry has updated its 2009 HC risk assessment - see above
Grabbed MPEC 2009-K01 - Daily Orbit Update - see above