Contents  on 19 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 19 August '10

The MPC's NEO Confirmation Page is currently empty

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

New MPECs  on 19 August '10

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-Q13 - "20:51 UT" - 2010 PY75

<< DOU on 19 Aug. '10 >>  MPEC 2010-Q12 - "06:12 UT" - Daily Orbit Update

Observers  on 19 August '10

Twelve observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2010-Q12 & 2010-Q13 -- 2010 PY75, 2010 PR66, 2010 PP2
300Bisei Spaceguard Center in Japan, 1 in MPEC 2010-Q13 -- 2010 PY75
160Castelmartini Obs. in Italy, 1 in MPEC 2010-Q13 -- 2010 PY75
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 4 in MPEC 2010-Q12 -- 2010 PS66, 2010 PM9, 2010 OK126, 2010 GA24
J95Great Shefford Obs. in England, 1 in MPEC 2010-Q13 -- 2010 PY75
J93Mt. Tuffley Obs. in England, 2 in MPEC 2010-Q12 -- 5786, 4055
I33SOAR in Chile, 1 in MPEC 2010-Q13 -- 2010 PY75
H36Sandlot Obs. in Kansas, 1 in MPEC 2010-Q13 -- 2010 PY75
204Schiaparelli Obs. in Italy, 14 in MPEC 2010-Q12 -- 2010 PY22, 2010 PO2, 2010 PJ9, 2010 ON101, 2010 MF1, 2010 KZ117, 2010 FO92, 2010 CB55, 2008 OS9, 2008 AT28, 2007 VG189, 2007 ML13, 2002 NE71, 2001 OT
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2010-Q13 -- 2010 PY75
C51WISE in Earth polar orbit, 9 in MPECs 2010-Q12 & 2010-Q13 -- 2010 PY75, 2009 AV, 2007 VG189, 2006 CX10, 2003 MJ4, 2000 YH29, 152952, 100926, 5645
198Wildberg Obs. in Germany, 1 in MPEC 2010-Q13 -- 2010 PY75
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 August '10

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.
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 Sentry15002015-2109263.9e-07-3.75-4.450JPL: "Analysis based on 47 observations spanning 1.8847 days (2010-Aug-15.2648 to 2010-Aug-17.14952)." Diameter approximately 0.440 km. from mean, weighted H=19.4.
NEODyS15002015-208973.23e-08-4.82-4.890NEODyS: "Based on 47 optical observations (of which 0 are rejected as outliers) from 2010/08/15.266 to 2010/08/17.150."

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 19 August '10

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

2101Grabbed MPEC 2010-Q13 - 2010 PY75 - see above
Noted that the NEOCP has become empty
1500Noted 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-Q12 - Daily Orbit Update - see above