Contents  on 6 April '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 6 April '09

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one updated listing.

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 6 April '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.

<< DOU on 6 Apr. '09 >>  MPEC 2009-G19 - "06:12 UT" - Daily Orbit Update

MPEC 2009-G18 - "04:06 UT" - 2008 JV19

Observers  on 6 April '09

Thirteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 12 in MPEC 2009-G19 -- 2009 FY29, 2009 FN32, 2009 FJ30, 2009 DR36, 2009 DL46, 2009 DL1, 2009 DG9, 2009 DE47, 2009 BE81, 2008 YK2, 2003 WW87, 1999 YA
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2009-G19 -- 7822
300Bisei Spaceguard Center in Japan, 2 in MPEC 2009-G19 -- 2009 FW4, 2008 SV11
493Calar Alto Obs. in Spain, 2 in MPECs 2009-G18 & 2009-G19 -- 2009 FS4, 2008 JV19
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2009-G19 -- 90367, 86666, 85275, 138883, 3102
I21El Condor Obs. in Argentina, 2 in MPEC 2009-G19 -- 2008 SV11, 208617
E16Grove Creek Obs. in New South Wales, 2 in MPEC 2009-G19 -- 2008 WN2, 52768
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2009-G19 -- 2008 SV11, 2007 BT2
704LINEAR in New Mexico, 3 in MPEC 2009-G19 -- 2008 WL60, 198856, 14402
I36Los Campitos Obs. in Argentina, 1 in MPEC 2009-G19 -- 2009 FP28
A13Naef Obs. in Switzerland, 3 in MPECs 2009-G18 & 2009-G19 -- 2008 WL60, 2008 JV19, 198856
204Schiaparelli Obs. in Italy, 2 in MPECs 2009-G18 & 2009-G19 -- 2008 JV19, 2004 VC
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2009-G19 -- 2009 FJ
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 April '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: JPL at 2313 and NEODyS 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 FJJPL Sentry13272058-210794.2e-05-4.40-4.430JPL: "Analysis based on 119 observations spanning 18.983 days (2009-Mar-17.30916 to 2009-Apr-05.2917)." Diameter approximately 0.036 km. from mean, weighted H=24.9.
NEODyS13272058-208874.09e-05-4.41-4.430NEODyS: "Based on 126 optical observations (of which 7 are rejected as outliers) from 2009/03/17.245 to 2009/04/05.292."

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 6 April '09

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

1327Noted that JPL Sentry has updated its 2009 FJ risk assessment - see above
Noted that NEODyS has updated its 2009 FJ risk assessment - see above
Grabbed MPEC 2009-G19 - Daily Orbit Update - see above
0455Grabbed MPEC 2009-G18 - 2008 JV19 - see above
Noted that the NEOCP has become active