Contents  on 9 November '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.

Radar Astrometry  on 9 November '11

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 2004 UTC when the database was dated 9 Nov.

NEOCP Activity  on 9 November '11

The MPC's NEO Confirmation Page has 5 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five objects listed. Of these, two were "one nighters." So far The Tracking News has counted a total of seven listings on the NEOCP today.

New MPECs  on 9 November '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 9 Nov. '11 >>  MPEC 2011-V33 - "06:06 UT" - Daily Orbit Update

Observers  on 9 November '11

Thirteen observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 14 in MPEC 2011-V33 -- 2011 VH5, 2011 VB, 2011 UZ275, 2011 UZ255, 2011 UQ91, 2011 TA4, 2011 RR12, 2011 QG9, 2011 OV4, 2011 OQ5, 2011 NY, 2011 KF4, 2010 JF, 2009 VO24
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPEC 2011-V33 -- 2011 UZ275, 2011 UZ255, 2011 TP6, 2011 SR69, 2011 QY37, 2011 LC19, 1993 VD
G58Chabot Obs. in northern California, 2 in MPEC 2011-V33 -- 2011 UV158, 2011 UP63
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2011-V33 -- 2011 UT91
252Goldstone DSS-13 34m antenna in southern California, 1 in radar -- 2005 YU55
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2005 YU55
379Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2011-V33 -- 2011 SR69, 2011 LC19, 2004 JO2, 154302
J37Huelva Obs. in Spain, 1 in MPEC 2011-V33 -- 1036
C32Ka-Dar Obs. TAU Station in Russia, 6 in MPEC 2011-V33 -- 2011 VV5, 2011 UZ275, 2011 UZ114, 2011 QG9, 2011 GH3, 2010 JF
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-V33 -- 2011 LH21
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPEC 2011-V33 -- 2004 TN, 2004 FH11, 96315
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-V33 -- 2011 VU5
204Schiaparelli Obs. in Italy, 8 in MPEC 2011-V33 -- 2011 UU158, 2011 UQ91, 2011 UJ169, 2011 UH20, 2011 UD64, 2011 MD11, 2008 UX, 2004 FH11
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 November '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 CLOMON2 risk pages.





Notes for Today's Latest Risk Assessments
2011 UZ255JPL Sentry16532069-207221.6e-05-4.01-4.010JPL: "Analysis based on 67 observations spanning 8.8757 days (2011-Oct-30.44574 to 2011-Nov-08.32142)." Diameter approximately 0.075 km. from mean, weighted H=23.3.
NEODyS16532066-208941.42e-05-4.05-4.070NEODyS: "Based on 67 optical observations (of which 0 are rejected as outliers) from 2011-10-30.447 to 2011-11-08.322."

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 9 November '11

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

2004Noted Radar Astrometry database update - see above
1655Grabbed MPEC 2011-V33 - Daily Orbit Update - see above
1653Noted that JPL Sentry has updated its 2011 UZ255 risk assessment - see above
Noted that NEODyS has updated its 2011 UZ255 risk assessment - see above