Contents  on 1 February '12

Note: These A/CC news pages will update less often and less regularly than usual through Thursday, February 2nd, and possibly later.


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.

Traffic Report  on 1 February '12

Three objects reported inside ten LD

Three asteroids are reported traveling within ten lunar distances (LD) of Earth today. 2012 BD14 is outbound, moving from 6.04 to 6.68 LD, intruder 2012 BX34 departs from inside ten LD, moving from 9.21 to 11.32 LD, and risk-listed 2012 BA102 leaves ten LD, passing from 9.35 to 11.00 LD.

Next up, radar target 2011 CP4 arrives inside ten LD on February 22nd.

This report was updated at 1749 UTC with follow-up in today's DOU MPEC for 2012 BA102 and 2012 BV61.

Notes: Ten LD has no astronomical significance but is a useful reporting boundary. Distances are interpreted by A/CC from JPL Horizons data. See also today's timeline plus current additional details, sky chart, and ephemerides.

NEOCP Activity  on 1 February '12

The MPC's NEO Confirmation Page has 50 listings

When last checked at 2305 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 50 objects listed. Of these, 34 were "one nighters." So far The Tracking News has counted a total of 60 listings on the NEOCP 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 1 February '12

Minor Planet Electronic Circulars

As of last check at 2305 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2012-C06 - "22:32 UT" - 2012 BC20

MPEC 2012-C05 - "22:02 UT" - 2012 BQ123

MPEC 2012-C04 - "21:55 UT" - 2012 BP123

MPEC 2012-C03 - "21:53 UT" - 2012 BO123

MPEC 2012-C02 - "21:50 UT" - 2012 BN123

<< DOU on 1 Feb. '12 >>  MPEC 2012-C01 - "06:05 UT" - Daily Orbit Update

Observers  on 1 February '12

A total of 21 observers appear in today's MPECs.

CodeObserver / observatory
I69AGM Obs., 1 in MPEC 2012-C01 -- 142563
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2012-C01 -- 2012 BF77
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPEC 2012-C01 -- 2012 BV61, 2012 BT23, 2012 BN11
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2012-C01 -- 29075
703Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2012-C01 & 2012-C06 -- 2012 BC20, 2003 BL1, 35396, 163000, 141498
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2012-C01 -- 433
448Desert Moon Obs. in New Mexico, 3 in MPEC 2012-C01 -- 2002 RD27, 90147, 163760
355Hadano Obs. in Japan, 1 in MPEC 2012-C01 -- 2011 SL102
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2012-C01 -- 2008 WZ13, 162186
J37Huelva Obs. in Spain, 1 in MPEC 2012-C01 -- 433
704LINEAR in New Mexico, 8 in MPEC 2012-C01 -- 2012 BA102, 2011 YM63, 2006 VY13, 85990, 275792, 21088, 153951, 10145
C01Lohrmann Obs. in Germany, 3 in MPEC 2012-C01 -- 2011 SR69, 2011 SL102, 433
D54MASTER-II Obs. Blagoveshchensk in Russia, 1 in MPEC 2012-C01 -- 3103
C41MASTER-II Obs. Kislovodsk in Russia, 1 in MPEC 2012-C01 -- 21088
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2012-C01, 2012-C02, 2012-C03, 2012-C04 & 2012-C05 -- 2012 BQ123, 2012 BP123, 2012 BO123, 2012 BN123, 2004 MD, 2002 BF25, 162038
566NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2012-C01 -- 2005 SG19
608NEAT's USAF Haleakala telescope in Hawaii, 2 in MPEC 2012-C01 -- 2002 AW, 1221
A24New Millennium Obs. in Italy, 19 in MPEC 2012-C01 -- 2011 SL102, 99799, 85839, 32906, 29075, 24475, 21088, 209924, 20826, 16816, 162186, 10145, 8567, 7358, 4183, 2201, 1866, 1627, 1620
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2012-C01 -- 138013
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPEC 2012-C01 -- 2007 RT19, 1996 AE2, 86039, 21277, 159857, 1221
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2012-C01 & 2012-C02 -- 2012 BN123, 2012 BN11, 2012 BM86, 2012 BH86, 2012 BE14, 2011 YZ28
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 February '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2305 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
2012 BA102JPL Sentry17442093-211233.9e-06-6.54-6.550JPL: "Analysis based on 15 observations spanning 1.3960 days (2012-Jan-30.21365 to 2012-Jan-31.60961)." Diameter approximately 0.017 km. from mean, weighted H=26.5.
2012 BM86JPL Sentry17442072-210272.3e-08-6.10-6.540JPL: "Analysis based on 14 observations spanning 1.8586 days (2012-Jan-29.55767 to 2012-Jan-31.41632)." Diameter approximately 0.151 km. from mean, weighted H=21.8.
NEODyS1744R 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 1 February '12

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

2305Grabbed MPEC 2012-C02 - 2012 BN123 - see above
Grabbed MPEC 2012-C03 - 2012 BO123 - see above
Grabbed MPEC 2012-C04 - 2012 BP123 - see above
Grabbed MPEC 2012-C05 - 2012 BQ123 - see above
Grabbed MPEC 2012-C06 - 2012 BC20 - see above
1749Posted Traffic Report
1744Noted that JPL Sentry has updated its 2012 BA102 risk assessment - see above
Noted that JPL Sentry has updated its 2012 BM86 risk assessment - see above
Noted that NEODyS has removed 2012 BM86 as an impact risk - see above
Grabbed MPEC 2012-C01 - Daily Orbit Update - see above