Contents  on 22 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 22 February '08

The MPC's NEO Confirmation Page has 3 listings: 1 new, 2 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and two updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of four objects listed on the NEOCP at some point today.

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 22 February '08

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been two MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-D26 - "19:34 UT" - 2008 DE

<< DOU on 22 Feb. '08 >>  MPEC 2008-D25 - "07:06 UT" - Daily Orbit Update

Observers  on 22 February '08

Seven observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 3 in MPECs 2008-D25 & 2008-D26 -- 2008 DE, 2008 CK, 2008 AE4
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2008-D25 & 2008-D26 -- 2008 DE, 1999 RH33
J34La Fecha Obs. in Spain, 3 in MPEC 2008-D25 -- 2007 VQ4, 2005 TU45, 2005 EK70
A70Lumijoki Obs. in Finland, 2 in MPEC 2008-D25 -- 2008 CN1, 2008 AE
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-D25 -- 2007 YF
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-D25 -- 2007 SV2
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2008-D25 -- 2008 CR118

Impact Risk Monitoring  on 22 February '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2354 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.
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 DEJPL Sentry23542015-2103442.5e-07-3.62-3.760JPL: "Analysis based on 18 observations spanning 8.9606 days (2008-Feb-12.30854 to 2008-Feb-21.269174)." Diameter approximately 0.479 km. from mean, weighted H=19.2.

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 22 February '08

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

2354Noted that JPL Sentry has posted 2008 DE as an impact risk - see above
2017Grabbed MPEC 2008-D26 - 2008 DE - see above
1507Grabbed MPEC 2008-D25 - Daily Orbit Update - see above