Contents  on 7 February '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.

Traffic Report  on 7 February '12

No objects reported inside ten LD

No asteroids are reported to be inside ten lunar distances (LD) of our planet today. Approaching our neighborhood, radar target 2011 CP4 arrives inside ten LD on February 22nd.

This report was posted at 1550 UTC with follow-up in today's DOU MPEC for departed 2012 BX34, 2012 BD14, and 2012 BW13.

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 7 February '12

The MPC's NEO Confirmation Page has 7 listings

When last checked at 2259 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of ten 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 7 February '12

Minor Planet Electronic Circulars

As of last check at 2300 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 7 Feb. '12 >>  MPEC 2012-C34 - "06:04 UT" - Daily Orbit Update

Observers  on 7 February '12

Ten observers appear in today's MPEC.

CodeObserver / observatory
695{Tomas Vorobjov in England via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2012-C34 -- 163000
I89Nerpio Obs. in Italy, 2 in MPEC 2012-C34 -- 2012 BX34, 2003 AF23
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2012-C34 -- 162038
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2012-C34 -- 2011 WV134, 2008 WZ13, 2006 CJ, 2006 AL8, 294739, 1620
5611Janos Kelemen via Piszkesteto Station in Hungary, 1 in MPEC 2012-C34 -- 163051
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-C34 -- 2006 AL8
204Schiaparelli Obs. in Italy, 11 in MPEC 2012-C34 -- 2012 BX13, 2012 BW13, 2012 BT23, 2012 BJ11, 2012 BD14, 2012 BB2, 2011 YU74, 2011 YL6, 2010 LN14, 2009 BT5, 2005 JA22
E12Siding Spring Survey (SSS) in New South Wales, 22 in MPEC 2012-C34 -- 2011 OB, 2011 NZ, 2011 MO4, 2011 MB2, 2011 KW15, 2011 KR12, 2011 KO17, 2011 KD11, 2011 HO, 2011 DL19, 2009 AH16, 2006 AK8, 2001 QP181, 2001 QD96, 260141, 172722, 153792, 137158, 136923, 8507, 7358, 1866
H47Vicksburg Obs. in Mississippi, 3 in MPEC 2012-C34 -- 192642, 153951, 142348
I15Wishing Star Obs. in Rhode Island, 4 in MPEC 2012-C34 -- 2006 CJ, 311554, 137805, 1866
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 February '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2300 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 BW13JPL Sentry15482072-2111113.6e-06-6.77-7.140JPL: "Analysis based on 34 observations spanning 5.6870 days (2012-Jan-19.20743 to 2012-Jan-24.89438)." Diameter approximately 0.012 km. from mean, weighted H=27.2.
NEODyS15482072-208434.95e-08-8.50-8.860NEODyS: "Based on 34 optical observations (of which 1 are rejected as outliers) from 2012-01-19.208 to 2012-01-24.895."

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 February '12

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

1550Posted Traffic Report
1548Noted that JPL Sentry has updated its 2012 BW13 risk assessment - see above
Noted that NEODyS has updated its 2012 BW13 risk assessment - see above
Grabbed MPEC 2012-C34 - Daily Orbit Update - see above