Contents  on 2 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 2 January '11

The MPC's NEO Confirmation Page has 5 listings: 5 new

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five new listings. Of these, four were "one nighters." So far The Tracking News has counted a total of six 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 2 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.

MPEC 2011-A05 - "20:25 UT" - 2009 SM103

<< DOU on 2 Jan. '11 >>  MPEC 2011-A04 - "07:10 UT" - Daily Orbit Update

Observers  on 2 January '11

Twelve observers appear in today's MPECs.

CodeObserver / observatory
J24Altamira Obs. in the Canary Islands, 6 in MPEC 2011-A04 -- 2010 YS, 2010 YB, 2010 XX58, 2010 XP51, 2010 WQ7, 2010 WP8
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2011-A05 -- 2009 SM103
160Castelmartini Obs. in Italy, 14 in MPEC 2011-A04 -- 2010 YW, 2010 YS, 2010 YB, 2010 XP51, 2010 XG3, 2010 WQ7, 2010 WP8, 2010 VK188, 2010 TP54, 2010 SD13, 2010 NW117, 2010 LR68, 2010 LF86, 2010 JL33
H20Eastern Illinois Univ. Obs. in Illinois, 12 in MPEC 2011-A04 -- 2010 YH, 2010 WP8, 2010 WJ, 2010 NW117, 2010 JL33, 2007 MK13, 2006 WY2, 2004 YZ23, 2002 OS4, 2000 AD205, 2000 AC6, 1999 XR35
355Hadano Obs. in Japan, 7 in MPEC 2011-A04 -- 2010 YB, 2010 XP51, 2010 LR68, 2010 JL33, 2002 OS4, 137084, 1864
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2011-A04 -- 2010 JL33, 2007 EM88
B28Mandi Obs. in Italy, 1 in MPEC 2011-A04 -- 2000 AC6
H36Sandlot Obs. in Kansas, 4 in MPEC 2011-A04 -- 2010 XY72, 2010 XX72, 2010 XC11, 2010 XB24
204Schiaparelli Obs. in Italy, 26 in MPEC 2011-A04 -- 2010 YW, 2010 YS, 2010 YR, 2010 YH, 2010 XX58, 2010 XC24, 2010 WL, 2010 TP54, 2010 TM3, 2010 SD13, 2010 RR179, 2010 RN80, 2010 NW117, 2010 JL33, 2007 EM88, 2007 EJ, 2006 VA3, 2005 UB, 2005 GC120, 2004 BE11, 2003 WL25, 2002 OS4, 2000 AZ93, 2000 AD205, 1999 XR35, 1997 XS2
587Sormano Obs. in Italy, 3 in MPEC 2011-A04 -- 2010 YS, 2010 YB, 2010 XC25
I28Starhoo Obs. in Massachusetts, 2 in MPEC 2011-A04 -- 162781, 4954
C51WISE in Earth polar orbit, 2 in MPEC 2011-A04 -- 2006 VB14, 249886
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 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
2010 XC25JPL Sentry17002048-205553.4e-06-3.26-3.300JPL: "Analysis based on 58 observations spanning 24.583 days (2010-Dec-08.37716 to 2011-Jan-01.95986)." Diameter approximately 0.250 km. from mean, weighted H=20.7.
NEODyS17002048-206353.36e-06-3.26-3.310NEODyS: "Based on 59 optical observations (of which 1 are rejected as outliers) from 2010-12-08.378 to 2011-01-01.961."

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 2 January '11

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

2225Grabbed MPEC 2011-A05 - 2009 SM103 - see above
1700Noted 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-A04 - Daily Orbit Update - see above