Contents  on 1 April '10


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 1 April '10

The MPC's NEO Confirmation Page has 14 listings: 13 new, 1 updated

When last checked at 2343 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had thirteen new and one updated listings. Of these, two 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 1 April '10

Minor Planet Electronic Circulars

As of last check at 2352 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 1 Apr. '10 >>  MPEC 2010-G01 - "06:07 UT" - Daily Orbit Update

Observers  on 1 April '10

Twelve observing facilities appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 14 in MPEC 2010-G01 -- 2010 CN44, 2010 CL18, 2010 CD19, 2009 WC26, 2009 UV18, 2009 UN3, 2009 CB3, 2006 DU62, 2004 XD50, 2004 FG11, 2002 NW16, 2000 CO101, 68216, 139289
J95Great Shefford Obs. in England, 3 in MPEC 2010-G01 -- 2010 FS, 2010 FO, 2010 FL48
704LINEAR in New Mexico, 5 in MPEC 2010-G01 -- 2010 FQ, 2004 XD50, 54789, 152931, 1866
560Madonna di Dossobuono Obs. in Italy, 5 in MPEC 2010-G01 -- 2010 FQ, 2010 DB34, 2010 CN44, 2010 CC180, 2000 CO101
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2010-G01 -- 2010 EW45, 2010 CH18
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2010-G01 -- 54789, 27346
H68Red Barn Obs. in Georgia, 1 in MPEC 2010-G01 -- 218863
I20Rio Cuarto Obs. in Argentina, 10 in MPEC 2010-G01 -- 2009 UV18, 2008 EE, 2003 EG, 2000 CO101, 85628, 25916, 220124, 163243, 154029, 1864
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2010-G01 -- 2010 FS9, 2005 SC71
I19Tanti Obs. in Argentina, 4 in MPEC 2010-G01 -- 2010 EK12, 2010 EF21, 2010 CC180, 2007 EP88
A48Verona Obs. in Italy, 1 in MPEC 2010-G01 -- 2010 DB34
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2010-G01 -- 4055
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 April '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2352 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. Both also post impact solutions beyond 100 years for a few special 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
2010 EW45NEODyS1605R E M O V E D-
JPL Sentry1406R E M O V E DJPL: Risk listing removed at 0951 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 1 April '10

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

1605Noted that NEODyS has removed 2010 EW45 as an impact risk - see above
1406Noted that JPL Sentry has removed 2010 EW45 as an impact risk - see above
Grabbed MPEC 2010-G01 - Daily Orbit Update - see above