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Contents  on 23 July '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 23 July '08

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There was one listing noted earlier today.

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New MPECs  on 23 July '08

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 23 July '08 >>  MPEC 2008-O20 - "06:06 UT" - Daily Orbit Update

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Observers  on 23 July '08

Eight observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2008-O20 -- 2008 HS3
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2008-O20 -- 2005 RC34
J59Linceo Obs. in Spain, 1 in MPEC 2008-O20 -- 11398
A13Naef Obs. in Switzerland, 2 in MPEC 2008-O20 -- 2008 NB, 136818
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2008-O20 -- 2005 TU45, 2005 RC34, 2001 XW266, 189058, 174050, 173689, 11398, 8567, 7889
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2008-O20 -- 2008 NS1, 2008 NO3, 2008 MH1
H53Thompsonville Obs. in Illinois, 6 in MPEC 2008-O20 -- 35107, 11398, 8567, 4179, 3288, 1980
F85Tiki Obs. in Tahiti, 1 in MPEC 2008-O20 -- 2008 NQ3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

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Impact Risk Monitoring  on 23 July '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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.
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 NO3JPL Sentry1435209914.2e-08-4.55-4.550JPL: "Analysis based on 16 observations spanning 8.0031 days (2008-Jul-14.36382 to 2008-Jul-22.36696)." Diameter approximately 0.630 km. from mean, weighted H=18.6.
NEODyS1435R E M O V E D-

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 23 July '08

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

1902The NEOCP has become empty
1742The NEOCP has become active
1435Noted that JPL Sentry has updated its 2008 NO3 risk assessment - see above
Noted that NEODyS has removed 2008 NO3 as an impact risk - see above
Grabbed MPEC 2008-O20 - Daily Orbit Update - see above