Contents  on 6 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 6 January '11

The MPC's NEO Confirmation Page has 1 listing: 1 new

When last checked at 2342 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new listing. This was a "one nighter." So far The Tracking News has counted a total of three 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 6 January '11

Minor Planet Electronic Circulars

As of last check at 2342 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 6 Jan. '11 >>  MPEC 2011-A26 - "07:10 UT" - Daily Orbit Update

MPEC 2011-A25 - "05:47 UT" - 2011 AO4

MPEC 2011-A24 - "01:18 UT" - 2011 AN4

Observers  on 6 January '11

Thirteen observers appear in today's MPECs.

CodeObserver / observatory
J24Altamira Obs. in the Canary Islands, 3 in MPEC 2011-A26 -- 2010 YS, 2010 YB, 2010 XP51
H21Astronomical Research Obs. Westfield in Illinois, 21 in MPEC 2011-A26 -- 2010 XJ, 2010 XG11, 2010 XC15, 2010 XB24, 2010 WV8, 2010 WL, 2010 WG3, 2010 VZ71, 2010 VY71, 2010 VY190, 2010 VE1, 2010 UF7, 2010 TM4, 2010 TH19, 2010 TC47, 2010 LR68, 2010 KR10, 2004 BL11, 2004 BJ86, 2001 JW2, 141670
160Castelmartini Obs. in Italy, 4 in MPEC 2011-A26 -- 2010 YB, 2010 XP51, 2010 VK188, 2010 LR68
703Catalina Sky Survey (CSS) in Arizona, 7 in MPEC 2011-A26 -- 2010 WE9, 2010 LF86, 2000 AC6, 68548, 34613, 177255, 141498
G58Chabot Obs. in northern California, 1 in MPEC 2011-A26 -- 2011 AB3
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 2 in MPECs 2011-A24 & 2011-A25 -- 2011 AO4, 2011 AN4
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2011-A26 -- 2010 TP54, 2010 JL33, 2002 OS4
046Klet Obs. in the Czech Republic, 2 in MPEC 2011-A26 -- 2011 AL1, 2011 AC3
704LINEAR in New Mexico, 20 in MPEC 2011-A26 -- 2011 AC3, 2010 YH, 2010 XP51, 2010 WP8, 2010 NW117, 2010 LF86, 2010 JL33, 2003 YS117, 2000 AC6, 86324, 48603, 34613, 253106, 23183, 175706, 154589, 137084, 3199, 2212, 1580
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2011-A24, 2011-A25 & 2011-A26 -- 2011 AO4, 2011 AN4, 2010 AO2
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2011-A24, 2011-A25 & 2011-A26 -- 2011 AO4, 2011 AN4, 2001 YM4
A13Naef Obs. in Switzerland, 1 in MPEC 2011-A26 -- 2007 EM88
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2011-A26 -- 2010 XJ3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 January '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2342 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
2011 AH3NEODyS15332015-2090572.49e-09-5.15-5.690NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2011-01-04.233 to 2011-01-05.328."

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 6 January '11

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

1533Noted that NEODyS has posted 2011 AH3 as an impact risk - see above
Grabbed MPEC 2011-A26 - Daily Orbit Update - see above
0606Grabbed MPEC 2011-A25 - 2011 AO4 - see above
0200Grabbed MPEC 2011-A24 - 2011 AN4 - see above