Contents  on 22 August '10


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 22 August '10

The MPC's NEO Confirmation Page is currently empty

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

New MPECs  on 22 August '10

Minor Planet Electronic Circulars

As of last check at 1900 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-Q22 - "17:05 UT" - 2010 QN1

<< DOU on 22 Aug. '10 >>  MPEC 2010-Q21 - "06:09 UT" - Daily Orbit Update

Observers  on 22 August '10

Fifteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2010-Q22 -- 2010 QN1
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2010-Q21 -- 2010 PR66
B88Bigmuskie Obs. in Italy, 1 in MPEC 2010-Q21 -- 2010 PR66
I99Blanquita Obs. in Spain, 4 in MPEC 2010-Q21 -- 2010 OC, 2010 MF1, 19764, 143381
160Castelmartini Obs. in Italy, 10 in MPEC 2010-Q21 -- 66146, 66008, 243147, 242211, 19764, 153842, 152952, 143381, 6239, 4197
176Consell Obs. in Spain, 1 in MPEC 2010-Q21 -- 2010 PR66
J27El Guijo Obs. in Spain, 1 in MPEC 2010-Q21 -- 2010 PR66
203GiaGa Obs. in Italy, 4 in MPEC 2010-Q21 -- 2010 PR66, 2010 MF1, 2002 NE71, 5786
704LINEAR in New Mexico, 1 in MPEC 2010-Q21 -- 2005 GE59
844Los Molinos Obs. in Uruguay, 1 in MPEC 2010-Q21 -- 6239
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-Q21 -- 2010 KK127
A13Naef Obs. in Switzerland, 2 in MPEC 2010-Q21 -- 2010 PM9, 243147
A53Peschiera del Garda Obs. in Italy, 1 in MPEC 2010-Q21 -- 2002 NE71
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2010-Q21 & 2010-Q22 -- 2010 QN1, 2007 ML13
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2010-Q21 -- 1865
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 August '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 1900 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.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
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
2010 PR66JPL Sentry15032098-210722.8e-07-4.02-4.030JPL: "Analysis based on 86 observations spanning 6.7523 days (2010-Aug-15.2648 to 2010-Aug-22.01714)." Diameter approximately 0.450 km. from mean, weighted H=19.4.
NEODyS1503207811.09e-11-8.24-8.240NEODyS: "Based on 86 optical observations (of which 0 are rejected as outliers) from 2010/08/15.266 to 2010/08/22.018."

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 22 August '10

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

1900Grabbed MPEC 2010-Q22 - 2010 QN1 - see above
Noted that the NEOCP has become empty
1503Noted that JPL Sentry has updated its 2010 PR66 risk assessment - see above
Noted that NEODyS has updated its 2010 PR66 risk assessment - see above
Grabbed MPEC 2010-Q21 - Daily Orbit Update - see above