Contents  on 8 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 8 January '11

The MPC's NEO Confirmation Page has 11 listings: 3 new, 8 updated

When last checked at 2304 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and eight updated listings. Of these, eight were "one nighters." So far The Tracking News has counted a total of twelve 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 8 January '11

Minor Planet Electronic Circulars

As of last check at 2304 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 8 Jan. '11 >>  MPEC 2011-A29 - "07:10 UT" - Daily Orbit Update

Observers  on 8 January '11

Nine observers appear in today's MPEC.

CodeObserver / observatory
J24Altamira Obs. in the Canary Islands, 2 in MPEC 2011-A29 -- 2010 JL33, 12923
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPEC 2011-A29 -- 2010 YW, 2010 YO, 2010 YB, 2010 XX58, 2010 XL69, 2010 VX39, 2010 VB140, 2010 UX7, 3122
I114Joseph Masiero in southern California via Gemini South Obs. in Chile, 1 in MPEC 2011-A29 -- 2010 XY82
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2011-A29 -- 2010 JL33, 2002 OS4, 96590
704LINEAR in New Mexico, 7 in MPEC 2011-A29 -- 2010 YH, 2010 LF86, 86324, 143381, 137084, 12923, 4688
844Los Molinos Obs. in Uruguay, 3 in MPEC 2011-A29 -- 2011 AC3, 2004 TR12, 1620
474Mt. John Obs. in New Zealand, 7 in MPEC 2011-A29 -- 2010 XO56, 2010 XE25, 2010 XC24, 2010 TC55, 2010 TA55, 2010 RN82, 2010 RB
F51Pan-STARRS 1 (PS1) in Hawaii, 54 in MPEC 2011-A29 -- 2006 WQ29, 2004 FX31, 87311, 87309, 68350, 68278, 65690, 53789, 52761, 52689, 31669, 31221, 30825, 253062, 23548, 226554, 225900, 216707, 20826, 206359, 20460, 199145, 19764, 190788, 189011, 17188, 16960, 168378, 162913, 162269, 161998, 159929, 154007, 152964, 143381, 142781, 141851, 138847, 12538, 100926, 8013, 7977, 6611, 6239, 6178, 5869, 5731, 5011, 4660, 4503, 4486, 4341, 4183, 2329
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2011-A29 -- 2010 XZ72, 2010 XC25, 2010 KY127, 2010 JH87, 2010 JF88
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 January '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2304 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 XC25JPL Sentry16352048-205337.0e-06-3.00-3.030JPL: "Analysis based on 74 observations spanning 30.117 days (2010-Dec-08.37716 to 2011-Jan-07.49375)." Diameter approximately 0.230 km. from mean, weighted H=20.8.
NEODyS16352050-205326.87e-06-3.02-3.040NEODyS: "Based on 75 optical observations (of which 1 are rejected as outliers) from 2010-12-08.378 to 2011-01-07.495."

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 8 January '11

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

1635Noted that JPL Sentry has updated its 2010 XC25 risk assessment - see above
Noted that NEODyS has updated its 2010 XC25 risk assessment - see above
Grabbed MPEC 2011-A29 - Daily Orbit Update - see above