Contents  on 7 January '09


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 7 January '09

The MPC's NEO Confirmation Page has 5 listings: 5 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five updated listings. Of these, four were "one nighters."

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs  on 7 January '09

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-A43 - "21:57 UT" - Comet P/2008 Y3 (McNaught)

MPEC 2009-A42 - "20:24 UT" - 2007 OR10

MPEC 2009-A41 - "13:47 UT" - 2000 YJ29 = 2009 AO

<< DOU on 7 Jan. '09 >>  MPEC 2009-A40 - "07:12 UT" - Daily Orbit Update

Observers  on 7 January '09

Fifteen observing facilities appear in today's MPECs.

CodeObserver / observatory
432Boambee Obs. in New South Wales, 3 in MPEC 2009-A40 -- 2004 LV3, 53430, 153306
807Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2009-A42 -- 2007 OR10
B60Deep Sky Obs. in Germany, 3 in MPEC 2009-A40 -- 22099, 8567, 3838
E85Farm Cove Obs. in New Zealand, 1 in MPEC 2009-A43 -- P/2008 Y3
683Goodricke-Pigott Obs. in Arizona, 2 in MPEC 2009-A40 -- 2001 FX9, 3199
J95Great Shefford Obs. in England, 2 in MPECs 2009-A40 & 2009-A43 -- 2008 YV32, P/2008 Y3
379Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2009-A40 -- 2008 WL60, 2008 SH82, 2008 EV5, 2005 BC, 89355
B15Inastars Obs. in Germany, 1 in MPEC 2009-A40 -- 141765
B12Koschny Obs., 3 in MPEC 2009-A40 -- 2009 AT, 2005 WS55, 137805
900Moriyama Obs. in Japan, 1 in MPEC 2009-A43 -- P/2008 Y3
675Mt. Palomar in southern California, 1 in MPEC 2009-A42 -- 2007 OR10
423North Ryde Obs. in New South Wales, 1 in MPEC 2009-A43 -- P/2008 Y3
E12Siding Spring Survey in New South Wales, 1 in MPEC 2009-A40 -- 2006 BQ147
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2009-A40 -- 2008 YF29, 2008 WZ94
673Table Mtn. Obs. in southern California, 1 in MPEC 2009-A43 -- P/2008 Y3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 January '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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
2008 YV32JPL Sentry14482085-2107137.7e-06-6.08-6.670JPL: "Analysis based on 36 observations spanning 6.7511 days (2008-Dec-31.22029 to 2009-Jan-06.97134)." Diameter approximately 0.018 km. from mean, weighted H=26.3.
NEODyS14482069-208851.1e-06-6.86-7.080NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2008/12/31.221 to 2009/01/06.972."
2008 YF29NEODyS14482045-209021.99e-07-6.57-6.620NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2008/12/30.250 to 2009/01/07.241."

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 7 January '09

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

2259Grabbed MPEC 2009-A43 - Comet P/2008 Y3 (McNaught) - see above
2103Grabbed MPEC 2009-A42 - 2007 OR10 - see above
1448Noted that NEODyS has updated its 2008 YF29 risk assessment - see above
Noted that JPL Sentry has updated its 2008 YV32 risk assessment - see above
Noted that NEODyS has updated its 2008 YV32 risk assessment - see above
Grabbed MPEC 2009-A40 - Daily Orbit Update - see above
Grabbed MPEC 2009-A41 - 2000 YJ29 = 2009 AO - see above