Contents  on 17 February '11


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 17 February '11

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (checked at 2359 UTC). It was last noted active yesterday.

New MPECs  on 17 February '11

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 2011-D08 - "16:12 UT" - 2011 BV59

<< DOU on 17 Feb. '11 >>  MPEC 2011-D07 - "07:10 UT" - Daily Orbit Update

Observers  on 17 February '11

Six observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 4 in MPEC 2011-D07 -- 2011 CZ6, 2011 CY7, 2011 CH50, 2011 AN16
B75Betelgeuse Station in Italy, 1 in MPEC 2011-D07 -- 3122
704LINEAR in New Mexico, 4 in MPEC 2011-D07 -- 89830, 23183, 137052, 5496
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-D08 -- 2011 BV59
A24New Millennium Obs. in Italy, 21 in MPEC 2011-D07 -- 2011 AF37, 2009 DV42, 2005 GW119, 2001 DQ8, 2000 CR101, 96590, 85275, 48603, 36284, 23183, 21374, 18882, 175706, 152889, 152563, 137084, 111253, 5496, 4954, 3122, 1864
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2011-D08 -- 2011 BV59
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 February '11

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 CLOMON (backup) risk pages.





Notes for Today's Latest Risk Assessments
2011 BU59NEODyS17462072-208641.92e-07-7.36-7.720NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2011-01-30.476 to 2011-02-07.563."

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 17 February '11

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

1746Noted that NEODyS has posted 2011 BU59 as an impact risk - see above
Grabbed MPEC 2011-D07 - Daily Orbit Update - see above
Grabbed MPEC 2011-D08 - 2011 BV59 - see above