Contents  on 24 January '08


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 24 January '08

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There were two listings noted earlier today.

New MPECs  on 24 January '08

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been nine MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-B46 - "19:16 UT" - Comets C/2007 X10, 2007 X11, 2007 X12, 2007 X13 (SOHO)

MPEC 2008-B45 - "19:09 UT" - Comets C/2007 X6, 2007 X7, 2007 X8, 2007 X9 (SOHO)

MPEC 2008-B44 - "17:42 UT" - PHAs

MPEC 2008-B43 - "17:42 UT" - Unusual Minor Planets

MPEC 2008-B42 - "17:42 UT" - Amors

MPEC 2008-B41 - "17:42 UT" - Atens and Apollos

MPEC 2008-B40 - "17:36 UT" - Distant Minor Planets

MPEC 2008-B39 - "16:59 UT" - Observable Comets

<< DOU on 24 Jan. '08 >>  MPEC 2008-B38 - "07:07 UT" - Daily Orbit Update

Observers  on 24 January '08

Eleven observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2008-B38 -- 2008 AK33
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2008-B38 -- 66407
H51Greiner Research Obs. in Wisconsin, 10 in MPEC 2008-B38 -- 2008 AF4, 1989 AZ, 90403, 68359, 170891, 153591, 5131, 4954, 1685, 1036
D35Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2008-B38 -- 9400
560Madonna di Dossobuono Obs. in Italy, 4 in MPEC 2008-B38 -- 2005 TU45, 2000 CH59, 3288, 1862
J40Malaga Obs. in Spain, 2 in MPEC 2008-B38 -- 2008 AF4, 4954
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-B38 -- 2008 AE4
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2008-B38 -- 2007 TU24, 2002 RC118
2492LASCO Coronagraph 2 (SOHO C2) via the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 8 in MPECs 2008-B45 & 2008-B46 -- C/2007 X9, C/2007 X8, C/2007 X7, C/2007 X6, C/2007 X13, C/2007 X12, C/2007 X11, C/2007 X10
2493LASCO Coronagraph 3 (SOHO C3) via the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 4 in MPECs 2008-B45 & 2008-B46 -- C/2007 X9, C/2007 X8, C/2007 X12, C/2007 X10
691Spacewatch 0.9m telescope in Arizona, 10 in MPEC 2008-B38 -- 2008 AV28, 2007 YT56, 2006 NM, 2006 KT1, 2006 BA148, 2004 BG121, 2003 QB90, 1999 RQ28, 162058, 9172
A78Stia Obs. in Italy, 3 in MPEC 2008-B38 -- 99935, 86324, 143678

Impact Risk Monitoring  on 24 January '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2354 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of 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 AF4NEODyS16142078-2089116.37e-06-2.89-2.980NEODyS: "Based on 221 optical observations (of which 3 are rejected as outliers) from 2008/01/10.397 to 2008/01/23.175."
JPL Sentry16132088-2099231.5e-05-2.54-2.990JPL: "Analysis based on 218 observations spanning 12.778 days (2008-Jan-10.39652 to 2008-Jan-23.17423)." Diameter approximately 0.380 km. from mean, weighted H=19.8.

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 24 January '08

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

2329The NEOCP has become empty
2012Grabbed MPEC 2008-B45 - Comets C/2007 X6, 2007 X7, 2007 X8, 2007 X9 (SOHO) - see above
Grabbed MPEC 2008-B46 - Comets C/2007 X10, 2007 X11, 2007 X12, 2007 X13 (SOHO) - see above
1813Grabbed MPEC 2008-B39 - Observable Comets - see above
Grabbed MPEC 2008-B40 - Distant Minor Planets - see above
Grabbed MPEC 2008-B41 - Atens and Apollos - see above
Grabbed MPEC 2008-B42 - Amors - see above
Grabbed MPEC 2008-B43 - Unusual Minor Planets - see above
Grabbed MPEC 2008-B44 - PHAs - see above
1614Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
1613Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
Grabbed MPEC 2008-B38 - Daily Orbit Update - see above