Contents  on 12 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 12 May '09

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two updated listings. So far The Tracking News has counted a total of four 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 12 May '09

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-J51 - "16:34 UT" - 2009 JG2

<< DOU on 12 May '09 >>  MPEC 2009-J50 - "06:07 UT" - Daily Orbit Update

Observers  on 12 May '09

Thirteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 12 in MPEC 2009-J50 -- 2009 JM1, 2009 JG1, 2009 HX67, 2009 HU77, 2009 HM82, 2009 HG60, 2009 HC, 2009 FY29, 2009 FG19, 2009 ED1, 2009 DV42, 2009 CC3
703Catalina Sky Survey in Arizona, 1 in MPEC 2009-J51 -- 2009 JG2
448Desert Moon Obs. in New Mexico, 4 in MPEC 2009-J50 -- 2009 HV77, 2009 HL21, 2009 CC3, 2002 QE7
808El Leoncito Obs. in Argentina, 11 in MPEC 2009-J50 -- 2008 WN2, 2008 SV11, 2004 FU64, 22771, 207945, 175706, 138911, 5620, 5604, 3199, 1036
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 1 in MPEC 2009-J51 -- 2009 JG2
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2009-J51 -- 2009 JG2
J93Mt. Tuffley Obs. in England, 3 in MPEC 2009-J50 -- 207945, 143651, 1036
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2009-J50 -- 2003 OB4
A13Naef Obs. in Switzerland, 3 in MPECs 2009-J50 & 2009-J51 -- 2009 JG2, 2009 JG1, 85774
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-J51 -- 2009 JG2
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-J51 -- 2009 JG2
E12Siding Spring Survey (SSS) in New South Wales, 9 in MPECs 2009-J50 & 2009-J51 -- 2009 JG2, 2009 JG1, 2009 HB82, 2009 EO2, 2009 DE47, 2008 WN2, 2001 SG286, 88254, 5626
B40Skylive Obs. in Italy, 1 in MPEC 2009-J50 -- 2004 FM17
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 May '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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 Sentry13182095-209852.0e-06-6.10-6.690JPL: "Analysis based on 114 observations spanning 22.940 days (2009-Apr-17.23164 to 2009-May-10.171269)." Diameter approximately 0.036 km. from mean, weighted H=24.9.
NEODyS1318R 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 12 May '09

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

1646Grabbed MPEC 2009-J51 - 2009 JG2 - see above
1318Noted 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-J50 - Daily Orbit Update - see above
Noted that the NEOCP has become active