Contents  on 6 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.

Radar Astrometry  on 6 January '12

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 2008 UTC when the database was dated 6 Jan.

Photometry is needed for upcoming radar targets and also some astrometry. See Arecibo and Goldstone schedules.

NEOCP Activity  on 6 January '12

The MPC's NEO Confirmation Page has 3 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three objects listed. Of these, one was a "one nighter." So far The Tracking News has counted a total of ten listings on the NEOCP today.

New MPECs  on 6 January '12

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 2012-A37 - "20:06 UT" - 2009 CQ1

<< DOU on 6 Jan. '12 >>  MPEC 2012-A36 - "06:05 UT" - Daily Orbit Update

Observers  on 6 January '12

Nineteen observers appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 2 in MPEC 2012-A36 -- 1866, 1627
251Arecibo in Puerto Rico, 1 in radar -- 175706
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPECs 2012-A36 & 2012-A37 -- 2012 AY, 2011 YW15, 2011 YV15, 2011 YU62, 2011 YJ28, 2011 YG6, 2011 YG28, 2011 YB40, 2011 YB29, 2011 YA, 2011 XE1, 2011 XD1, 2011 SR69, 2011 QS2, 2009 CQ1, 2008 GE1
B75Betelgeuse Station in Italy, 2 in MPEC 2012-A36 -- 2012 AE1, 2011 YA
300Bisei Spaceguard Center in Japan, 7 in MPEC 2012-A36 -- 2012 AE1, 2011 YV15, 2011 YH40, 2011 YA, 2011 WV134, 2011 SL102, 2003 AK18
B66Casasco Obs. in Italy, 3 in MPEC 2012-A36 -- 2011 SL102, 2003 AK18, 1620
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2012-A36 -- 2012 AC3, 2004 BB103
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPEC 2012-A36 -- 2011 YU62, 2008 SX245, 2007 YF1
448Desert Moon Obs. in New Mexico, 1 in MPEC 2012-A36 -- 1999 EE5
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2012-A36 -- 2011 SL102, 2003 AK18, 209924
C32Ka-Dar Obs. TAU Station in Russia, 3 in MPEC 2012-A36 -- 2011 YW1, 2011 YQ10, 2011 YH40
704LINEAR in New Mexico, 2 in MPEC 2012-A36 -- 85818, 137671
I36Los Campitos Obs. in Argentina, 3 in MPEC 2012-A36 -- 2011 XE1, 2011 UU106, 2011 SR69
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPEC 2012-A36 -- 2008 QT3, 2006 VY13, 154590, 154144, 3103
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2012-A36 -- 2011 YH40
J41Raheny Obs. in Ireland, 3 in MPEC 2012-A36 -- 2012 AE1, 2011 YW1, 2011 YA
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-A36 -- 138911
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2012-A36 -- 2011 YM63, 2011 YH28, 2011 WS2, 2011 WK5, 2010 SO16
I15Wishing Star Obs. in Rhode Island, 2 in MPEC 2012-A36 -- 2005 UJ159, 137805
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 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 YH28JPL Sentry1611207914.2e-08-5.00-5.000JPL: "Analysis based on 40 observations spanning 9.0701 days (2011-Dec-27.41812 to 2012-Jan-05.48821)." Diameter approximately 0.310 km. from mean, weighted H=20.2.
NEODyS16112079-207914.35e-08-5.01-5.010NEODyS: "Based on 40 optical observations (of which 0 are rejected as outliers) from 2011-12-27.419 to 2012-01-05.489."

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 '12

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

2008Grabbed MPEC 2012-A37 - 2009 CQ1 - see above
Noted Radar Astrometry database update - see above
1611Noted that JPL Sentry has updated its 2011 YH28 risk assessment - see above
Noted that NEODyS has updated its 2011 YH28 risk assessment - see above
Grabbed MPEC 2012-A36 - Daily Orbit Update - see above