Contents  on 8 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 8 February '12

No objects reported inside ten LD

No objects are reported within ten lunar distances (LD) of Earth today. Radar target 2011 CP4 arrives inside ten LD on February 22nd.

This report was updated at 1518 UTC with follow-up in today's DOU MPEC for 2012 CU.

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 8 February '12

The MPC's NEO Confirmation Page has 7 listings

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

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 8 February '12

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 8 Feb. '12 >>  MPEC 2012-C35 - "06:03 UT" - Daily Orbit Update

Observers  on 8 February '12

Ten observers appear in today's MPEC.

CodeObserver / observatory
I69AGM Obs., 2 in MPEC 2012-C35 -- 2011 WV134, 8567
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPEC 2012-C35 -- 2012 CT, 2012 CA, 2012 BM77, 2012 BK77, 2012 BJ86, 2012 BG86, 2012 BC124, 2012 AA11, 2011 YW1, 2011 YL6, 2011 XO3, 2011 XE1, 2011 WV134, 2011 QF14, 2011 MD5, 2011 FC29, 2004 YU5
I47Auger Obs. in Argentina, 1 in MPEC 2012-C35 -- 163243
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPEC 2012-C35 -- 2012 BM86, 2011 YU74, 2011 YU62, 2011 XE1, 2011 QF14, 2011 PW6
I17Cupillari Obs. in Pennsylvania, 2 in MPEC 2012-C35 -- 2006 AL8, 1627
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPEC 2012-C35 -- 2012 CU, 2012 BN11
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2012-C35 -- 153814
J69North Obs. in England, 1 in MPEC 2012-C35 -- 2011 SL102
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-C35 -- 175706
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2012-C35 -- 2011 WV134
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 February '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
2012 CUJPL Sentry15152040-210051.4e-06-6.54-6.820JPL: "Analysis based on 41 observations spanning 4.9765 days (2012-Feb-02.40401 to 2012-Feb-07.38055)." Diameter approximately 0.022 km. from mean, weighted H=26.0.
NEODyS15152040-204014.78e-08-7.56-7.560NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2012-02-02.405 to 2012-02-07.381."
2012 BJ86JPL Sentry15152085-210851.5e-06-4.27-4.600JPL: "Analysis based on 34 observations spanning 7.9690 days (2012-Jan-29.10142 to 2012-Feb-06.070446)." Diameter approximately 0.160 km. from mean, weighted H=21.6.
NEODyS15152085-208512.78e-07-4.92-4.920NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2012-01-29.102 to 2012-02-06.071."

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 8 February '12

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

1518Posted Traffic Report
1515Noted that JPL Sentry has updated its 2012 BJ86 risk assessment - see above
Noted that NEODyS has updated its 2012 BJ86 risk assessment - see above
Noted that JPL Sentry has updated its 2012 CU risk assessment - see above
Noted that NEODyS has updated its 2012 CU risk assessment - see above
Grabbed MPEC 2012-C35 - Daily Orbit Update - see above