Contents  on 27 November '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 27 November '08

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (checked at 2359 UTC). It was last noted active yesterday.

New MPECs  on 27 November '08

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been two MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-W79 - "16:16 UT" - 2007 US12

<< DOU on 27 Nov. '08 >>  MPEC 2008-W78 - "07:09 UT" - Daily Orbit Update

Observers  on 27 November '08

Thirteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2008-W78 -- 2008 WL60, 2008 WG14, 2008 UZ94, 2008 TN26, 2008 SP7
J27El Guijo Obs. in Spain, 4 in MPEC 2008-W78 -- 2008 WN2, 2008 VK14, 2004 XK3, 2001 LM5
151Eschenberg Obs. in Switzerland, 3 in MPEC 2008-W78 -- 2008 WN2, 2008 WL, 3200
B23Fiamene Obs. in Italy, 8 in MPEC 2008-W78 -- 2008 SQ1, 2008 SP7, 2008 RG98, 2008 MZ, 2008 MR1, 2005 WS55, 194386, 1980
J95Great Shefford Obs. in England, 1 in MPEC 2008-W78 -- 2008 WW32
379Hamamatsu-Yuto Obs. in Japan, 8 in MPEC 2008-W78 -- 2008 VU4, 2008 VK14, 2008 UE7, 2008 MZ, 2006 SZ217, 2004 XK3, 85774, 142348
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-W79 -- 2007 US12
B67Mirasteilas Obs. in Switzerland, 3 in MPEC 2008-W78 -- 85236, 162149, 12711
A13Naef Obs. in Switzerland, 2 in MPEC 2008-W78 -- 2008 WN2, 6178
204Schiaparelli Obs. in Italy, 3 in MPEC 2008-W78 -- 2008 WK, 2008 VF, 2008 UE7
H53Thompsonville Obs. in Illinois, 5 in MPEC 2008-W78 -- 85236, 53430, 8567, 3360, 1627
B39Tradate Obs. in Italy, 2 in MPEC 2008-W78 -- 2008 UE7, 3360
A48Verona Obs. in Italy, 4 in MPEC 2008-W78 -- 2008 WL60, 2008 WK, 2008 VU4, 2008 MZ
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 November '08

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.
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 WM64NEODyS17272013-2089408.73e-08-4.91-5.530NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2008/11/24.489 to 2008/11/26.468."
JPL Sentry05172010-210715474.2e-06-3.11-4.150JPL: "Analysis based on 8 observations spanning 1.9792 days (2008-Nov-24.48804 to 2008-Nov-26.46721)." Diameter approximately 0.196 km. from mean, weighted H=21.2.
2008 WW32NEODyS15312053-205522.41e-09-6.76-6.920NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2008/11/21.130 to 2008/11/25.834."
JPL Sentry1531R E M O V E DJPL: Risk listing removed at 0949 UTC.
144898 2004 VD17NEODyS05172102-210421.3e-07-4.55-4.550NEODyS: "Based on 970 optical observations (of which 4 are rejected as outliers) from 2002/02/16.463 to 2008/11/20.561."

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 27 November '08

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

1727Noted that NEODyS has posted 2008 WM64 as an impact risk - see above
Grabbed MPEC 2008-W79 - 2007 US12 - see above
1531Noted that JPL Sentry has removed 2008 WW32 as an impact risk - see above
Noted that NEODyS has updated its 2008 WW32 risk assessment - see above
Grabbed MPEC 2008-W78 - Daily Orbit Update - see above
0517Noted that NEODyS has updated its 2004 VD17 risk assessment - see above
Noted that JPL Sentry has posted 2008 WM64 as an impact risk - see above