Contents  on 7 January '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 7 January '11

The MPC's NEO Confirmation Page has 2 listings: 2 new

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new listings. Of these, one was a "one nighter."

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 7 January '11

Minor Planet Electronic Circulars

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

<< DOU on 7 Jan. '11 >>  MPEC 2011-A28 - "07:10 UT" - Daily Orbit Update

MPEC 2011-A27 - "02:33 UT" - 2010 WF3

Observers  on 7 January '11

Sixteen observers appear in today's MPECs.

CodeObserver / observatory
J24Altamira Obs. in the Canary Islands, 1 in MPEC 2011-A28 -- 111253
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2011-A28 -- 96590
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPEC 2011-A28 -- 2011 AN1, 2011 AM1, 2011 AL1, 2010 YS, 2010 YH, 2010 YB, 2010 XX58, 2010 XO10, 2010 XL69, 2010 XG3, 2010 XD25, 2010 SD13
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2011-A28 -- 2010 JL33
160Castelmartini Obs. in Italy, 1 in MPEC 2011-A28 -- 2010 WP8
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 2 in MPEC 2011-A28 -- 2010 YS, 2000 AZ93
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2011-A28 -- 2010 JL33, 2002 OS4, 96590
240Herrenberg Obs. in Germany, 1 in MPEC 2011-A28 -- 153842
046Klet Obs. in the Czech Republic, 7 in MPEC 2011-A28 -- 2010 YS, 2010 YB, 2010 XX58, 2010 XP51, 2010 VK188, 2010 LF86, 2006 WY2
704LINEAR in New Mexico, 11 in MPEC 2011-A28 -- 2011 AL1, 2011 AC3, 2010 YH, 2010 XP51, 2010 LF86, 2000 AC6, 1999 XK136, 86324, 243025, 143381, 137084
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2011-A27 -- 2010 WF3
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2011-A27 -- 2010 WF3
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPEC 2011-A28 -- 2007 VX137, 248818, 10115
I20Rio Cuarto Obs. in Argentina, 1 in MPEC 2011-A28 -- 2010 XK52
434San Benedetto Po Obs. in Italy, 1 in MPEC 2011-A28 -- 96590
I15Wishing Star Obs. in Rhode Island, 1 in MPEC 2011-A28 -- 111253
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 January '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 CLOMON (backup) risk pages.





Notes for Today's Latest Risk Assessments
2005 NX55JPL Sentry05422013-2102863.0e-08-5.05-5.410JPL: "Analysis based on 14 observations spanning 1.1343 days (2005-Jul-11.16281 to 2005-Jul-12.297115)." Diameter approximately 0.140 km. from mean, weighted H=21.9.

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 7 January '11

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

1600Grabbed MPEC 2011-A28 - Daily Orbit Update - see above
0542Noted that JPL Sentry has updated its 2005 NX55 risk assessment - see above
Grabbed MPEC 2011-A27 - 2010 WF3 - see above