Contents  on 28 December '10


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 28 December '10

The MPC's NEO Confirmation Page has 5 listings: 3 new, 2 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and two updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of six listings on the NEOCP at some point today.

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 28 December '10

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 2010-Y33 - "15:05 UT" - 2010 YO

<< DOU on 28 Dec. '10 >>  MPEC 2010-Y32 - "07:10 UT" - Daily Orbit Update

Observers  on 28 December '10

Eight observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 28 in MPEC 2010-Y32 -- 2010 YD, 2010 XT45, 2010 XR45, 2010 XO10, 2010 XM56, 2010 XG3, 2010 XC15, 2010 WQ7, 2010 WJ, 2010 VZ, 2010 VY190, 2010 RG137, 2010 PJ9, 2010 MF1, 2010 GU6, 2010 GA7, 2010 EK44, 2010 DP, 2010 DB34, 2010 CN44, 2010 CM44, 2010 CM, 2010 CL1, 2010 CC180, 2008 EE, 2006 VB14, 2005 ED318, 1999 HW1
160Castelmartini Obs. in Italy, 2 in MPEC 2010-Y32 -- 2010 JL33, 207945
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2010-Y32 -- 177255, 153842
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2010-Y32 -- 2010 RN80
704LINEAR in New Mexico, 2 in MPECs 2010-Y32 & 2010-Y33 -- 2010 YO, 2010 SD13
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-Y33 -- 2010 YO
H36Sandlot Obs. in Kansas, 3 in MPECs 2010-Y32 & 2010-Y33 -- 2010 YO, 2010 YB, 2010 WE9
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2010-Y32 -- 96590
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 December '10

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
2010 YDJPL Sentry1738R E M O V E DJPL: Risk listing removed at 1054 UTC.

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 28 December '10

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

1738Noted that JPL Sentry has removed 2010 YD as an impact risk - see above
Grabbed MPEC 2010-Y32 - Daily Orbit Update - see above
Grabbed MPEC 2010-Y33 - 2010 YO - see above