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Contents  on 9 August '08

Resources:

Note: The A/CC news pages may not update again until around or after midnight UTC today, Saturday August 9th.

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 9 August '08

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There were two listings noted earlier today.

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New MPECs  on 9 August '08

Minor Planet Electronic Circulars

As of last check at 2345 UTC, there have been five MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-P46 - "20:10 UT" - 2007 RG283


MPEC 2008-P45 - "16:48 UT" - 2008 PR9


MPEC 2008-P44 - "15:58 UT" - 2008 MB5


<< DOU on 9 Aug. '08 >>  MPEC 2008-P43 - "06:10 UT" - Daily Orbit Update


MPEC 2008-P42 - "02:49 UT" - 2001 QL153

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Observers  on 9 August '08

A total of 22 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2008-P43 -- 2008 PJ9, 2008 OY2, 2008 OT7, 2008 OO8, 2008 MQ1
069Baldone Obs. in Latvia, 1 in MPEC 2008-P43 -- 2008 OS9
I77CEAMIG-REA in Brazil, 1 in MPEC 2008-P44 -- 2008 MB5
B09Capannoli Obs. in Italy, 1 in MPEC 2008-P43 -- 65690
J65Celbridge Obs. in Ireland, 5 in MPEC 2008-P43 -- 2008 EM85, 2007 YV56, 1999 AQ10, 162173, 162117
A77Chante-Perdrix Obs. in France, 1 in MPEC 2008-P43 -- 3352
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2008-P44 -- 2008 MB5
J27El Guijo Obs. in Spain, 6 in MPEC 2008-P43 -- 90403, 65690, 16960, 164400, 8567, 1917
808El Leoncito Obs. in Argentina, 1 in MPEC 2008-P44 -- 2008 MB5
J95Great Shefford Obs. in England, 4 in MPECs 2008-P42 & 2008-P43 -- 2008 PG7, 2008 PF2, 2008 PF1, 2001 QL153
E17Leura Obs. in New South Wales, 1 in MPEC 2008-P43 -- 101873
932McCarthy Obs. in Connecticut, 3 in MPEC 2008-P43 -- 90403, 65690, 35107
675_Mike Brown via Mt. Palomar in southern California, 1 in MPEC 2008-P46 -- 2007 RG283
J53Posadas Obs. in Spain, 1 in MPEC 2008-P43 -- 188452
B38Santa Mama Obs. in Italy, 3 in MPEC 2008-P43 -- 2008 PG7, 2008 OS9, 188452
204Schiaparelli Obs. in Italy, 7 in MPEC 2008-P43 -- 2008 PF2, 2008 PF1, 2008 OS9, 2008 OP8, 2004 SB56, 188452, 7358
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2008-P43, 2008-P44 & 2008-P45 -- 2008 PR9, 2008 PK9, 2008 MB5
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-P44 -- 2008 MB5
A78Stia Obs. in Italy, 1 in MPEC 2008-P43 -- 2004 SB56
147Suno Obs. in Italy, 2 in MPEC 2008-P43 -- 2008 PW4, 2008 OS7
H53Thompsonville Obs. in Illinois, 6 in MPEC 2008-P43 -- 2008 PL3, 2008 OS9, 188452, 11398, 8567, 4179
B42Vitebsk Obs. in Belarus, 1 in MPEC 2008-P43 -- 35107
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 9 August '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2345 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 PR9JPL Sentry21572013-21081393.5e-07-4.86-5.690JPL: "Analysis based on 10 observations spanning .71797 days (2008-Aug-08.7276 to 2008-Aug-09.44557)." Diameter approximately 0.120 km. from mean, weighted H=22.3.
2008 PK9JPL Sentry14572045-205748.3e-08-5.66-5.840JPL: "Analysis based on 17 observations spanning .29787 days (2008-Aug-08.46082 to 2008-Aug-08.75869)." Diameter approximately 0.080 km. from mean, weighted H=23.1.
NEODyS1457204511.92e-08-6.24-6.240NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2008/08/08.462 to 2008/08/08.759."
2008 PJ9JPL Sentry14572063-207156.4e-07-4.56-4.650JPL: "Analysis based on 17 observations spanning 1.7795 days (2008-Aug-06.59348 to 2008-Aug-08.373)." Diameter approximately 0.170 km. from mean, weighted H=21.6.
NEODyS14572063-207165.19e-07-4.61-4.690NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2008/08/06.594 to 2008/08/08.374."
2008 PW4JPL Sentry1457R E M O V E DJPL: Risk listing removed at 0855 UTC.
NEODyS1457R E M O V E D-
2008 PF1JPL Sentry1457R E M O V E DJPL: Risk listing removed at 0854 UTC.
NEODyS1457R 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 9 August '08

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

2157Noted that JPL Sentry has posted 2008 PR9 as an impact risk - see above
Grabbed MPEC 2008-P46 - 2007 RG283 - see above
1723Grabbed MPEC 2008-P44 - 2008 MB5 - see above
Grabbed MPEC 2008-P45 - 2008 PR9 - see above
The NEOCP has become empty
1457Noted that JPL Sentry has removed 2008 PF1 as an impact risk - see above
Noted that NEODyS has removed 2008 PF1 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 PJ9 risk assessment - see above
Noted that NEODyS has posted 2008 PJ9 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 PK9 risk assessment - see above
Noted that NEODyS has posted 2008 PK9 as an impact risk - see above
Noted that JPL Sentry has removed 2008 PW4 as an impact risk - see above
Noted that NEODyS has removed 2008 PW4 as an impact risk - see above
Grabbed MPEC 2008-P43 - Daily Orbit Update - see above
0356Grabbed MPEC 2008-P42 - 2001 QL153 - see above