Contents  on 12 October '11


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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 12 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 on October 9th.

New MPECs  on 12 October '11

Minor Planet Electronic Circulars

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

MPEC 2011-T51 - "16:21 UT" - PHAs

MPEC 2011-T50 - "16:21 UT" - Unusual Minor Planets

MPEC 2011-T49 - "16:21 UT" - Amors

MPEC 2011-T48 - "16:21 UT" - Atens and Apollos

MPEC 2011-T47 - "16:19 UT" - Observable Comets

<< DOU on 12 Oct. '11 >>  MPEC 2011-T46 - "06:04 UT" - Daily Orbit Update

Observers  on 12 October '11

Seven observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPEC 2011-T46 -- 2011 TK, 2011 TG2, 2011 TA4, 2011 SQ12, 2011 SO32, 2011 SM68, 2011 SG5, 2011 KN9, 2011 KF4, 2011 HC36, 2005 CJ, 2002 QE7, 1991 TF3
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2011-T46 -- 2011 TA4, 2011 MD11
246KLENOT in the Czech Republic, 1 in MPEC 2011-T46 -- 2011 TL5
A13Naef Obs. in Switzerland, 2 in MPEC 2011-T46 -- 2006 SQ78, 2000 SP43
A24New Millennium Obs. in Italy, 8 in MPEC 2011-T46 -- 2011 SO32, 2011 SJ16, 90075, 20826, 190166, 163081, 137799, 3691
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 3 in MPEC 2011-T46 -- 2011 TA4, 2011 SM68, 2005 CJ
H47Vicksburg Obs. in Mississippi, 3 in MPEC 2011-T46 -- 2011 RR12, 138883, 138524
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 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 Sentry1614210011.1e-08-6.32-6.320JPL: "Analysis based on 57 observations spanning 9.9357 days (2011-Oct-01.34764 to 2011-Oct-11.283312)." 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 12 October '11

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

1726Grabbed MPEC 2011-T47 - Observable Comets - see above
Grabbed MPEC 2011-T48 - Atens and Apollos - see above
Grabbed MPEC 2011-T49 - Amors - see above
Grabbed MPEC 2011-T50 - Unusual Minor Planets - see above
Grabbed MPEC 2011-T51 - PHAs - see above
1614Noted that JPL Sentry has updated its 2011 TK risk assessment - see above
Grabbed MPEC 2011-T46 - Daily Orbit Update - see above