Contents  on 5 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 5 April '09

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There was one listing noted earlier today.

New MPECs  on 5 April '09

Minor Planet Electronic Circulars

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

<< DOU on 5 Apr. '09 >>  MPEC 2009-G17 - "06:11 UT" - Daily Orbit Update

Observers  on 5 April '09

Ten observing facilities appear in today's MPEC.

CodeObserver / observatory
J94Abbeydale Obs. in England, 1 in MPEC 2009-G17 -- 2008 SV11
H55Astronomical Research Obs. (ARO) in Illinois, 6 in MPEC 2009-G17 -- 2009 FG19, 2009 DN1, 2009 DD1, 2009 CZ2, 2009 AM15, 2008 EV5
493Calar Alto Obs. in Spain, 1 in MPEC 2009-G17 -- 2009 FS4
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2009-G17 -- 2009 FJ30
B60Deep Sky Obs. in Germany, 1 in MPEC 2009-G17 -- 2009 FA
I21El Condor Obs. in Argentina, 1 in MPEC 2009-G17 -- 2008 SV11
J95Great Shefford Obs. in England, 1 in MPEC 2009-G17 -- 2009 FY29
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2009-G17 -- 2009 FO28, 2009 FL25, 2009 CR2, 2008 YE29, 2008 SV11, 2007 BT2, 2002 VY94
204Schiaparelli Obs. in Italy, 3 in MPEC 2009-G17 -- 2007 BT2, 2005 EM30, 2005 EF
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2009-G17 -- 2009 FG19
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 April '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 FG19JPL Sentry1430R E M O V E DJPL: Risk listing removed at 0850 UTC.

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 5 April '09

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

1430Noted that JPL Sentry has removed 2009 FG19 as an impact risk - see above
Grabbed MPEC 2009-G17 - Daily Orbit Update - see above
Noted that the NEOCP has become empty