Contents  on 15 November '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 15 November '11

The MPC's NEO Confirmation Page has 3 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three objects listed. Of these, one was a "one nighter." 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 15 November '11

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 15 Nov. '11 >>  MPEC 2011-V42 - "06:03 UT" - Daily Orbit Update

Observers  on 15 November '11

Fifteen observers appear in today's MPEC.

CodeObserver / observatory
C60Argelander Institute for Astronomy Obs. in Germany, 1 in MPEC 2011-V42 -- 2005 YU55
160Castelmartini Obs. in Italy, 2 in MPEC 2011-V42 -- 302831, 208617
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPEC 2011-V42 -- 2011 UY255, 2011 QF23, 2011 EZ78, 15817
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 3 in MPEC 2011-V42 -- 2011 VS5, 2011 UZ275, 2011 UU106
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2011-V42 -- 2011 LC19, 2005 YU55, 2004 JO2
C32Ka-Dar Obs. TAU Station in Russia, 3 in MPEC 2011-V42 -- 2011 VW5, 2011 UZ275, 2011 UA115
B82Maidbronn Obs. in Germany, 1 in MPEC 2011-V42 -- 2005 YU55
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-V42 -- 2011 PU1
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2011-V42 -- 2011 UU106, 2005 YU55
D29Purple Mtn. Obs. Xuyi Station in China, 2 in MPEC 2011-V42 -- 302591, 2201
461SZTE Asteroid Program in Hungary, 3 in MPEC 2011-V42 -- 2011 VS5, 2011 MO4, 2005 YU55
233San Vito Obs. in Italy, 3 in MPEC 2011-V42 -- 2005 YU55, 2004 JO2, 5143
147Suno Obs. in Italy, 1 in MPEC 2011-V42 -- 2005 YU55
B18Terskol Obs. in Russia, 1 in MPEC 2011-V42 -- 2011 US63
G69Thousand Oaks Obs. in southern California, 1 in MPEC 2011-V42 -- 2005 YU55
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 November '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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 CLOMON2 risk pages.





Notes for Today's Latest Risk Assessments
2011 PU1JPL Sentry15452063-2106171.8e-04-4.11-4.460JPL: "Analysis based on 55 observations spanning 45.352 days (2011-Aug-06.9677 to 2011-Sep-21.319885)." Diameter approximately 0.033 km. from mean, weighted H=25.1.
NEODyS15452081-208841.69e-04-4.15-4.280NEODyS: "Based on 55 optical observations (of which 1 are rejected as outliers) from 2011-08-06.968 to 2011-09-21.321."

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 15 November '11

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

1545Noted that JPL Sentry has updated its 2011 PU1 risk assessment - see above
Noted that NEODyS has updated its 2011 PU1 risk assessment - see above
Grabbed MPEC 2011-V42 - Daily Orbit Update - see above
Noted that the NEOCP has become active