Contents  on 5 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 5 August '10

The MPC's NEO Confirmation Page has 10 listings: 10 new

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had ten new listings. Of these, nine were "one nighters." So far The Tracking News has counted a total of seventeen listings on the NEOCP at some point today.

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 5 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-P24 - "14:27 UT" - Comet C/2010 L3 (Catalina)

<< DOU on 5 Aug. '10 >>  MPEC 2010-P23 - "06:10 UT" - Daily Orbit Update

Observers  on 5 August '10

Eighteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPEC 2010-P23 -- 2010 OQ1, 2010 OP1, 2010 OC, 2010 NY65, 2010 MF1
160Castelmartini Obs. in Italy, 2 in MPEC 2010-P23 -- 2010 MF1, 2002 QY6
B11Cima Rest Obs. in Italy, 1 in MPEC 2010-P24 -- C/2010 L3
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2010-P23 -- 87311
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2010-P23 -- 2004 BW58
157Frasso Sabino Obs. in Italy, 1 in MPEC 2010-P24 -- C/2010 L3
J95Great Shefford Obs. in England, 3 in MPEC 2010-P23 -- 2010 PQ2, 2010 PP2, 2000 AA6
704LINEAR in New Mexico, 13 in MPEC 2010-P23 -- 2010 PQ2, 2010 PP2, 2010 PO2, 2010 PJ, 2007 PF6, 2007 ML13, 2002 PD43, 230979, 143381, 138404, 9202, 5143, 4183
J75La Sagra Obs. in Spain, 2 in MPEC 2010-P23 -- 2000 AA6, 138404
932McCarthy Obs. in Connecticut, 1 in MPEC 2010-P23 -- 2000 AA6
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2010-P23 -- 2002 NE71
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2010-P23 -- 101955
D21Shenton Park Obs. in Western Australia, 6 in MPEC 2010-P23 -- 2010 PQ2, 2010 PP2, 2010 PO2, 2010 PJ, 2010 OP1, 2001 OT
E12Siding Spring Survey in New South Wales, 1 in MPEC 2010-P23 -- 1980
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2010-P23 -- 2010 OL101, 231792
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2010-P23 -- 2010 ON101, 2010 OF101, 2010 NJ1, 2010 NB2, 2010 LQ33, 2010 HD33
C51WISE in Earth polar orbit, 12 in MPEC 2010-P23 -- 55408, 242643, 242147, 20460, 162566, 162483, 162269, 139345, 137062, 6455, 4486, 4055
I15Wishing Star Obs. in Rhode Island, 1 in MPEC 2010-P23 -- 4055
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 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 NY65NEODyS1431R E M O V E D-
JPL Sentry1431R E M O V E DJPL: Risk listing removed at 0954 UTC.
101955 1999 RQ36JPL Sentry15002169-219987.1e-04-1.12-1.52-JPL #2 for the day: "Analysis based on 9 radar delay, 4 Doppler, and 282 optical observations spanning 2448.8 days (1999-Sep-11.4 to 2006-May-26.2)." Diameter approximately 0.560 km. from mean, weighted H=20.7.

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 5 August '10

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

1500Noted that JPL Sentry has reposted 101955 1999 RQ36 as an impact risk - see above
Grabbed MPEC 2010-P24 - Comet C/2010 L3 (Catalina) - see above
1431Noted that JPL Sentry has removed 101955 1999 RQ36 as an impact risk - see above
Noted that JPL Sentry has removed 2010 NY65 as an impact risk - see above
Noted that NEODyS has removed 2010 NY65 as an impact risk - see above
Grabbed MPEC 2010-P23 - Daily Orbit Update - see above