Contents  on 11 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 11 January '09

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2355 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one updated listing.

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 11 January '09

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-A59 - "23:52 UT" - Comets C/2008 T6, 2008 T7, 2008 T8, 2008 T9, 2008 T10, 2008 T11, 2008 T12 (SOHO)

<< DOU on 11 Jan. '09 >>  MPEC 2009-A58 - "07:09 UT" - Daily Orbit Update

Observers  on 11 January '09

Five observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 25 in MPEC 2009-A58 -- 2009 AT, 2008 YZ32, 2008 YV32, 2008 YS27, 2008 YN27, 2008 YG3, 2008 YG26, 2008 YE3, 2008 YE29, 2008 XP2, 2008 XE2, 2008 XB1, 2008 WZ13, 2008 WK, 2008 WC14, 2008 WB59, 2008 VQ4, 2008 UC, 2008 TK157, 2008 SQ1, 2008 SH82, 2008 RY24, 2008 MN1, 2001 LM5, 2000 CO101
A94Cormons Obs. in Italy, 2 in MPEC 2009-A58 -- 137805, 3200
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2009-A58 -- 2008 EV5
B12Koschny Obs. in The Netherlands, 2 in MPEC 2009-A58 -- 1994 AW1, 137805
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 7 in MPEC 2009-A59 -- C/2008 T9, C/2008 T8, C/2008 T7, C/2008 T6, C/2008 T12, C/2008 T11, C/2008 T10
2493LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 4 in MPEC 2009-A59 -- C/2008 T9, C/2008 T8, C/2008 T11, C/2008 T10
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 January '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2355 and JPL at 2356 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 Sentry16142085-2107117.0e-06-6.14-6.800JPL: "Analysis based on 45 observations spanning 8.8674 days (2008-Dec-31.22029 to 2009-Jan-09.087737)." Diameter approximately 0.018 km. from mean, weighted H=26.4.
NEODyS16142085-209058.91e-07-6.98-7.300NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2008/12/31.221 to 2009/01/09.089."

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 11 January '09

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

2355Grabbed MPEC 2009-A59 - Comets C/2008 T6, 2008 T7, 2008 T8, 2008 T9, 2008 T10, 2008 T11, 2008 T12 (SOHO) - see above
1614Noted 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-A58 - Daily Orbit Update - see above