Contents  on 23 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 23 January '09

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There was one listing noted earlier today.

New MPECs  on 23 January '09

Minor Planet Electronic Circulars

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

<< DOU on 23 Jan. '09 >>  MPEC 2009-B48 - "07:05 UT" - Daily Orbit Update

Observers  on 23 January '09

Fourteen observing facilities appear in today's MPEC.

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2009-B48 -- 2008 VF
H55Astronomical Research Obs. (ARO) in Illinois, 13 in MPEC 2009-B48 -- 2009 BM2, 2009 BL2, 2009 BG, 2009 BF2, 2009 BF, 2009 BE2, 2009 BD, 2009 BB, 2009 AT, 2009 AM, 2009 AL15, 2009 AF16, 2008 SH82
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2009-B48 -- 142348, 4179
127Bornheim Obs. in Germany, 6 in MPEC 2009-B48 -- 2008 SH82, 2008 EV5, 89355, 162900, 162361, 141765
0953S. Nazarov via Crimean Astrophysical Obs. in the Ukraine, 1 in MPEC 2009-B48 -- 2009 BD
J95Great Shefford Obs. in England, 1 in MPEC 2009-B48 -- 2009 BJ2
B15Inastars Obs. in Germany, 1 in MPEC 2009-B48 -- 203015
704LINEAR in New Mexico, 13 in MPEC 2009-B48 -- 2009 BM2, 2009 BF2, 2006 AS2, 2005 NJ1, 2001 BJ16, 85867, 22753, 200840, 11405, 7358, 4055, 3360, 2368
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2009-B48 -- 2008 SH82, 2008 QT3
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPEC 2009-B48 -- 2009 BM2, 2009 BH2, 2009 BG, 2009 BE, 2009 AF16, 2009 AD16, 2008 XE2, 2008 UC95, 2008 MB5, 2008 EA32, 2006 AS2, 1999 CW8
473Remanzacco Obs. in Italy, 1 in MPEC 2009-B48 -- 111253
510Siegen Obs. in Germany, 7 in MPEC 2009-B48 -- 2009 BM2, 2009 BE, 2009 AD16, 2008 QT3, 2008 EV5, 4179, 1864
H53Thompsonville Obs. in Illinois, 3 in MPEC 2009-B48 -- 2008 QT3, 2006 AS2, 2002 VY94
A92Urseanu Obs. in Romania, 1 in MPEC 2009-B48 -- 2009 AD16
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 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.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Beginning Jan. 22nd, both are also posting some objects with impact solutions beyond 100 years.
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
2009 BEJPL Sentry14282061-2108216.3e-04-3.92-4.180JPL: "Analysis based on 81 observations spanning 6.0351 days (2009-Jan-16.36105 to 2009-Jan-22.39616)." Diameter approximately 0.020 km. from mean, weighted H=26.1.
NEODyS14282037-2090165.88e-04-3.95-4.190NEODyS: "Based on 81 optical observations (of which 0 are rejected as outliers) from 2009/01/16.362 to 2009/01/22.397."
2009 BDJPL Sentry14282054-2108344.9e-04-5.23-5.760JPL: "Analysis based on 111 observations spanning 5.9357 days (2009-Jan-16.27641 to 2009-Jan-22.212081)." Diameter approximately 0.007 km. from mean, weighted H=28.4.
NEODyS14282053-2090595.49e-04-5.19-5.760NEODyS: "Based on 112 optical observations (of which 1 are rejected as outliers) from 2009/01/16.277 to 2009/01/22.213."

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 23 January '09

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

1428Noted that JPL Sentry has updated its 2009 BD risk assessment - see above
Noted that NEODyS has updated its 2009 BD risk assessment - see above
Noted that JPL Sentry has updated its 2009 BE risk assessment - see above
Noted that NEODyS has updated its 2009 BE risk assessment - see above
Grabbed MPEC 2009-B48 - Daily Orbit Update - see above
Noted that the NEOCP has become empty