Contents  on 7 January '12


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 '12

The MPC's NEO Confirmation Page has 4 listings

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

New MPECs  on 7 January '12

Minor Planet Electronic Circulars

There was one MPEC posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 7 Jan. '12 >>  MPEC 2012-A38 - "06:05 UT" - Daily Orbit Update

Observers  on 7 January '12

Twelve observers appeared in this day's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPEC 2012-A38 -- 2012 AY, 2012 AE3, 2012 AE1, 2012 AC3, 2012 AB3, 2012 AA3, 2011 YW1, 2011 YV15, 2011 YM63, 2011 YJ28, 2011 YG28, 2011 YB40, 2011 YB29, 2011 XD1, 2005 YS, 2004 YU5, 2004 JO2
448Desert Moon Obs. in New Mexico, 3 in MPEC 2012-A38 -- 2011 WE44, 190208, 163760
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2012-A38 -- 2011 YA, 2011 SL102, 209924
704LINEAR in New Mexico, 4 in MPEC 2012-A38 -- 2012 AE1, 2011 YA, 2011 SL102, 137671
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-A38 -- 2004 MD
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPEC 2012-A38 -- 40263, 237805, 143381
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2012-A38 -- 2011 YH40
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-A38 -- 2011 YH40
I20Rio Cuarto Obs. in Argentina, 5 in MPEC 2012-A38 -- 2009 AK15, 2006 BQ147, 6053, 3122, 1980
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2012-A38 -- 2011 XS2, 2011 XE
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2012-A38 -- 2011 YH28, 2011 WA, 2011 TP6, 2010 FQ
A92Urseanu Obs. in Romania, 1 in MPEC 2012-A38 -- 24475
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 January '12

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 YH28NEODyS1735R E M O V E D-

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 '12

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

2016 1/8Grabbed MPEC 2012-A38 - Daily Orbit Update - see above
1735Noted that NEODyS has removed 2011 YH28 as an impact risk - see above