Contents  on 10 October '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 10 October '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 10 October '11

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 10 Oct. '11 >>  MPEC 2011-T44 - "06:05 UT" - Daily Orbit Update

Observers  on 10 October '11

Five observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPEC 2011-T44 -- 2011 TK, 2011 TJ, 2011 TC4, 2011 SR69, 2011 SQ12, 2011 SL102, 2011 SJ68, 2011 RR12, 2011 RF, 2011 OA, 2011 MO4, 2005 CJ, 2000 SP43, 1997 QK1, 1991 TF3
160Castelmartini Obs. in Italy, 6 in MPEC 2011-T44 -- 2011 OV4, 2011 OQ5, 2011 HC36, 2004 SV55, 1991 TF3, 276274
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2011-T44 -- 2000 SP43
233San Vito Obs. in Italy, 1 in MPEC 2011-T44 -- 1917
H47Vicksburg Obs. in Mississippi, 3 in MPEC 2011-T44 -- 138524, 136923, 3200
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 October '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 risk pages.





Notes for Today's Latest Risk Assessments
2011 TKJPL Sentry1503210012.2e-08-6.00-6.000JPL: "Analysis based on 55 observations spanning 7.8561 days (2011-Oct-01.34764 to 2011-Oct-09.203708)." Diameter approximately 0.190 km. from mean, weighted H=21.3.

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 10 October '11

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

1503Noted that JPL Sentry has updated its 2011 TK risk assessment - see above
Grabbed MPEC 2011-T44 - Daily Orbit Update - see above