Contents  on 10 July '11


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 10 July '11

The MPC's NEO Confirmation Page has 3 listings

When last checked at 2343 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three objects listed. Of these, two were "one nighters." So far The Tracking News has counted a total of four listings on the NEOCP 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 10 July '11

Minor Planet Electronic Circulars

As of last check at 2343 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 10 July '11 >>  MPEC 2011-N38 - "07:07 UT" - Daily Orbit Update

Observers  on 10 July '11

Eleven observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPEC 2011-N38 -- 2011 NZ, 2011 NY, 2011 NV, 2011 NP, 2011 ND, 2011 MY2, 2011 MW1, 2011 MV1, 2011 ML, 2011 MK, 2011 MF, 2011 ME, 2011 KN9, 2011 AG5, 162196
807,Ovidiu Vaduvescu via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2011-N38 -- 2008 XB1
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-N38 -- 2011 AG5
J95Great Shefford Obs. in England, 1 in MPEC 2011-N38 -- 2011 NY
A17Guidestar Obs. in Germany, 2 in MPEC 2011-N38 -- 2011 MK, 2011 LD19
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2011-N38 -- 2008 LV16, 7358, 1036
704LINEAR in New Mexico, 5 in MPEC 2011-N38 -- 219071, 12923, 7336, 4055, 1036
844Los Molinos Obs. in Uruguay, 1 in MPEC 2011-N38 -- 2011 HO
H23Pear Tree Obs. in Florida, 1 in MPEC 2011-N38 -- 68348
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2011-N38 -- 2011 EZ78, 2011 DL19, 2008 LV16
C70Uiterstegracht Station, 1 in MPEC 2011-N38 -- 1036
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 July '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2343 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 risk pages.





Notes for Today's Latest Risk Assessments
2011 AG5JPL Sentry17002040-204754.4e-04-1.67-1.681JPL: "Analysis based on 181 observations spanning 182.21 days (2011-Jan-08.2673 to 2011-Jul-09.47379)." Diameter approximately 0.140 km. from mean, weighted H=21.9.
NEODyS15302040-204761.26e-03-1.22-1.221NEODyS: "Based on 181 optical observations (of which 0 are rejected as outliers) from 2011-01-08.268 to 2011-07-09.475."

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 10 July '11

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

1700Noted that JPL Sentry has updated its 2011 AG5 risk assessment - see above
1530Noted that NEODyS has updated its 2011 AG5 risk assessment - see above
Grabbed MPEC 2011-N38 - Daily Orbit Update - see above