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Contents  on 6 February '08

Resources:

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.

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NEOCP Activity  on 6 February '08

The MPC's NEO Confirmation Page has 5 listings: 1 new, 4 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and four updated listings. Of these, four 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.

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New MPECs  on 6 February '08

Minor Planet Electronic Circulars

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


<< DOU on 6 Feb. '08 >>  MPEC 2008-C34 - "07:09 UT" - Daily Orbit Update

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Observers  on 6 February '08

Ten observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2008-C34 -- 2007 WB5
703Catalina Sky Survey (CSS) in Arizona, 10 in MPEC 2008-C34 -- 2007 YK, 96189, 18736, 16657, 162038, 144922, 138947, 138013, 5587, 1627
176Consell Obs. in Spain, 2 in MPEC 2008-C34 -- 2008 BT18, 2008 BO16
J44Iturrieta Obs. in Spain, 2 in MPEC 2008-C34 -- 2008 AF4, 2005 EK70
474Mt. John Obs. in New Zealand, 1 in MPEC 2008-C34 -- 2008 AB31
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2008-C34 -- 2007 TU24
691Spacewatch 0.9m telescope in Arizona, 12 in MPEC 2008-C34 -- 2008 BO16, 2008 AM33, 2005 WR2, 2004 HW, 2003 WC25, 2003 QZ29, 2003 EE16, 1998 FX134, 68063, 141053, 137078, 2202
6735Jim Young via Table Mtn. Obs. in southern California, 2 in MPEC 2008-C34 -- 2008 BH16, 2008 BD15
G72University Hills Obs. in southern California, 4 in MPEC 2008-C34 -- 2008 BD15, 2008 AF4, 2007 TU24, 2007 TG8
A92Urseanu Obs. in Romania, 2 in MPEC 2008-C34 -- 2007 TU24, 3288

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Impact Risk Monitoring  on 6 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 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.
0000NNN000

Object
Risk
Monitor		When
Noted
UTC		0000T0000
Year
Range
VI
#		000NN00
Prob
Cum		T0000
PS
Cum		T0000
PS
Max
T
S

Notes for Today's Latest Risk Assessments
2008 CT1NEODyS08342041-2090363.27e-05-5.80-6.190NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2008/02/03.336 to 2008/02/03.984."
2008 BT18JPL Sentry1559R E M O V E DJPL: Risk listing removed at 1056 UTC.
NEODyS1559R E M O V E D
2008 BO16JPL Sentry15592045-204921.8e-06-4.22-4.230JPL: "Analysis based on 27 observations spanning 6.5723 days (2008-Jan-30.38083 to 2008-Feb-05.95314)." Diameter approximately 0.088 km. from mean, weighted H=22.9.
NEODyS15592045-204921.8e-06-4.22-4.230NEODyS: "Based on 28 optical observations (of which 1 are rejected as outliers) from 2008/01/30.382 to 2008/02/05.954."
2008 AF4JPL Sentry15592078-2105353.8e-05-2.13-2.650JPL: "Analysis based on 384 observations spanning 26.495 days (2008-Jan-10.39652 to 2008-Feb-05.89151)." Diameter approximately 0.380 km. from mean, weighted H=19.7.
NEODyS15592067-2091207.01e-06-2.84-3.130NEODyS: "Based on 388 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/05.892."

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.

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Chronology  on 6 February '08

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

1559Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Noted that JPL Sentry has updated its 2008 BO16 risk assessment - see above
Noted that NEODyS has updated its 2008 BO16 risk assessment - see above
Noted that JPL Sentry has removed 2008 BT18 as an impact risk - see above
Noted that NEODyS has removed 2008 BT18 as an impact risk - see above
0834Noted that NEODyS has posted 2008 CT1 as an impact risk - see above
Grabbed MPEC 2008-C34 - Daily Orbit Update - see above