Contents  on 21 July '10

Note: A/CC news pages will update infrequently for much of the remainder of July.


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 21 July '10

The MPC's NEO Confirmation Page has 19 listings: 13 new, 6 updated

When last checked at 2128 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had thirteen new and six updated listings. Of these, seven were "one nighters."

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 21 July '10

Minor Planet Electronic Circulars

As of last check at 2128 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 21 July '10 >>  MPEC 2010-O17 - "06:13 UT" - Daily Orbit Update

MPEC 2010-O16 - "04:05 UT" - 2003 WX87

Observers  on 21 July '10

Nine observing facilities appear in today's MPECs.

CodeObserver / observatory
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2010-O17 -- 2002 OS4
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 4 in MPEC 2010-O17 -- 2010 OC, 2010 OB, 2010 LE15, 2006 KL21
704LINEAR in New Mexico, 3 in MPEC 2010-O17 -- 2009 WC26, 2009 AV, 23187
J75La Sagra Obs. in Spain, 2 in MPEC 2010-O17 -- 168378, 138404
5683Christian Veillet on Mauna Kea in Hawaii, 1 in MPEC 2010-O16 -- 2003 WX87
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2010-O17 -- 2002 AC9
A13Naef Obs. in Switzerland, 1 in MPEC 2010-O17 -- 2010 AE
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2010-O17 -- 2010 OC, 2010 OA
510Siegen Obs. in Germany, 1 in MPEC 2010-O17 -- 4055
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 July '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2128 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 OCJPL Sentry1303207713.8e-09-5.52-5.520JPL: "Analysis based on 34 observations spanning 1.4755 days (2010-Jul-19.31361 to 2010-Jul-20.789114)." Diameter approximately 0.600 km. from mean, weighted H=18.8.
2010 NY65NEODyS13032011-2087272.26e-08-4.38-4.470NEODyS: "Based on 7 optical observations (of which 0 are rejected as outliers) from 2010/07/14.144 to 2010/07/20.280."

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 21 July '10

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

1303Noted that JPL Sentry has updated its 2010 OC risk assessment - see above
Grabbed MPEC 2010-O17 - Daily Orbit Update - see above
1302Noted that NEODyS has posted 2010 NY65 as an impact risk - see above
Grabbed MPEC 2010-O16 - 2003 WX87 - see above