Contents  on 28 November '07


The latest news: framed access (best), RSS news feed RSS news feed (flags updates), or redirection - Note: A/CC has a main Web site and a backup site, which now has its own backup 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 this year 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 28 November '07

Not active

The Minor Planet Center's NEO discovery Confirmation Page (NEOCP) was empty when checked at 2354 UTC, but earlier two listings were noted.

New MPECs  on 28 November '07

Minor Planet Electronic Circulars

There were two MPECs issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2007-W78 - "19:47 UT" - 2007 EH88

<< DOU on 28 Nov. '07 >>  MPEC 2007-W77 - "07:09 UT" - Daily Orbit Update

Observers  on 28 November '07

Nine observing facilities appeared in this day's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2007-W78 -- 2007 EH88
808El Leoncito Obs. in Argentina, 4 in MPEC 2007-W77 -- 2007 PU11, 2002 RC118, 66251, 54686
H51Greiner Research Obs. in Wisconsin, 1 in MPEC 2007-W77 -- 2007 VR183
699LONEOS in Arizona, 1 in MPEC 2007-W77 -- 162173
A13Naef Obs. in Switzerland, 2 in MPEC 2007-W77 -- 1993 TQ2, 85804
A24New Millennium Obs. in Italy, 16 in MPEC 2007-W77 -- 2007 US6, 2007 TG8, 2007 TG15, 2007 TB23, 2007 RU12, 2007 LR32, 2004 RD252, 99907, 86324, 20826, 168044, 143678, 138893, 137084, 3553, 2212
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2007-W77 -- 2007 VW137
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2007-W77 -- 2007 WW4, 66959
A78Stia Obs. in Italy, 4 in MPEC 2007-W77 -- 2007 VT6, 2007 VM184, 2007 VE191, 2007 US6

Impact Risk Monitoring  on 28 November '07

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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is now 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
2007 VE191JPL Sentry15072015-202622.2e-04-2.08-2.080JPL: "Analysis based on 57 observations spanning 11.940 days (2007-Nov-15.26603 to 2007-Nov-27.20581)." Diameter approximately 0.062 km. from mean, weighted H=23.7.
NEODyS15072015-202622.17e-04-2.09-2.090NEODyS: "Based on 57 optical observations (of which 1 are rejected as outliers) from 2007/11/15.267 to 2007/11/27.207."

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 28 November '07

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

2354Grabbed MPEC 2007-W78 - 2007 EH88 - see above
The NEOCP has become empty
1915The NEOCP has become active
1507Noted that NEODyS has reposted 2007 VE191 as an impact risk - see above
Grabbed MPEC 2007-W77 - Daily Orbit Update - see above
1506Noted that JPL Sentry has updated its 2007 VE191 risk assessment - see above