Contents  on 5 February '08


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 February '08

The MPC's NEO Confirmation Page has 2 listings: 1 new, 1 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and one updated listing. Both of these were "one nighters."

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs  on 5 February '08

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 5 Feb. '08 >>  MPEC 2008-C33 - "07:07 UT" - Daily Orbit Update

Observers  on 5 February '08

Twelve observing facilities appear in today's MPEC.

CodeObserver / observatory
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2008-C33 -- 2003 CA
A27Eridanus Obs. in Germany, 1 in MPEC 2008-C33 -- 2007 TU24
B34Green Island Obs. in Cyprus, 4 in MPEC 2008-C33 -- 2008 AF4, 2007 PU11, 2005 TU45, 1989 AZ
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2008-C33 -- 2008 AF4, 2007 TU24, 2005 TU45
A35Hormersdorf Obs. in Germany, 3 in MPEC 2008-C33 -- 2005 TU45, 170891, 153591
B15Inastars Obs. in Germany, 1 in MPEC 2008-C33 -- 2006 JY25
130Lumezzane Obs. in Italy, 1 in MPEC 2008-C33 -- 1989 AZ
711McDonald Obs. in Texas, 10 in MPEC 2008-C33 -- 2008 BE, 2007 YV56, 2007 XJ20, 2007 SP6, 2005 XD1, 2004 DD, 2003 BH84, 2000 DP107, 1999 FN53, 5863
118Modra Obs. in Slovakia, 1 in MPEC 2008-C33 -- 2008 CK
D29Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2008-C33 -- 144922
619Sabadell Obs. in Spain, 1 in MPEC 2008-C33 -- 2007 TU24
F85Tiki Obs. in Tahiti, 1 in MPEC 2008-C33 -- 2008 CH

Impact Risk Monitoring  on 5 February '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2355 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of objects under current observation.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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
2008 CT1JPL Sentry02092041-21071079.2e-05-5.15-5.480JPL: "Analysis based on 13 observations spanning .64893 days (2008-Feb-03.33478 to 2008-Feb-03.98371)." Diameter approximately 0.011 km. from mean, weighted H=27.5.
2008 CS1NEODyS15512011-20901541.43e-08-4.81-5.720NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/02/03.503 to 2008/02/04.064."
2008 AF4NEODyS15512067-2090176.27e-06-2.89-3.240NEODyS: "Based on 379 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/04.767."

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 February '08

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

1551Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
1550Noted that NEODyS has posted 2008 CS1 as an impact risk - see above
Grabbed MPEC 2008-C33 - Daily Orbit Update - see above
0209Noted that JPL Sentry has posted 2008 CT1 as an impact risk - see above