Contents  on 29 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 29 January '08

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (last checked at 2354 UTC).

New MPECs  on 29 January '08

Minor Planet Electronic Circulars

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

MPEC 2008-B61 - "23:17 UT" - Comets C/2007 Y8, 2007 Y9, 2007 Y10, 2008 A3 (SOHO)

MPEC 2008-B60 - "23:07 UT" - 2005 BT1

MPEC 2008-B59 - "19:49 UT" - 2007 YV29

<< DOU on 29 Jan. '08 >>  MPEC 2008-B58 - "07:07 UT" - Daily Orbit Update

Observers  on 29 January '08

Sixteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 18 in MPEC 2008-B58 -- 2008 BU2, 2008 BE, 2008 AW28, 2008 AU26, 2008 AK33, 2008 AG1, 2008 AF32, 2008 AE, 2007 YN56, 2007 XY9, 2007 XJ20, 2007 VH186, 2007 TB23, 2007 SV2, 2007 RT147, 2004 AR1, 13553, 1981
432Boambee Obs. in New South Wales, 1 in MPEC 2008-B58 -- 2007 TU24
B09Capannoli Obs. in Italy, 1 in MPEC 2008-B58 -- 2008 AF4
480Cockfield Obs., 1 in MPEC 2008-B58 -- 2007 TU24
151Eschenberg Obs. in Switzerland, 1 in MPEC 2008-B58 -- 2007 TU24
143Gnosca Obs. in Switzerland, 1 in MPEC 2008-B58 -- 2007 TU24
J95Great Shefford Obs. in England, 4 in MPECs 2008-B58, 2008-B59 & 2008-B60 -- 2008 AF4, 2007 YV29, 2007 YV29, 2005 BT1
B19Iluro Obs. in Spain, 2 in MPEC 2008-B58 -- 2007 VQ4, 4450
B57Laietania Obs., 1 in MPEC 2008-B58 -- 1036
130Lumezzane Obs. in Italy, 5 in MPEC 2008-B58 -- 2007 SV2, 2005 TU45, 2000 CH59, 153591, 7977
560Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2008-B58 -- 2007 TU24, 1993 TQ2, 1862
J93Mt. Tuffley Obs. in England, 2 in MPEC 2008-B58 -- 4954, 1036
644NEAT's Mt. Palomar telescope in southern California, 2 in MPECs 2008-B59 & 2008-B60 -- 2007 YV29, 2005 BT1
204Schiaparelli Obs. in Italy, 3 in MPECs 2008-B58 & 2008-B60 -- 2007 TU24, 2005 BT1, 153591
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2008-B58 -- 2005 NB7, 85709, 137427
2492LASCO Coronagraph 2 (SOHO C2) via the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 3 in MPEC 2008-B61 -- C/2008 A3, C/2007 Y8, C/2007 Y10
2493LASCO Coronagraph 3 (SOHO C3) via the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 2 in MPEC 2008-B61 -- C/2007 Y9, C/2007 Y10

Impact Risk Monitoring  on 29 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 AS28JPL Sentry0100R E M O V E DJPL: Risk listing removed at 0047 UTC.
2008 AF4JPL Sentry15292088-2100231.3e-05-2.62-3.020JPL #2 for the day: "Analysis based on 305 observations spanning 18.715 days (2008-Jan-10.39652 to 2008-Jan-29.11148)." Diameter approximately 0.380 km. from mean, weighted H=19.8.
NEODyS15292078-2090122.11e-06-3.38-3.520NEODyS: "Based on 309 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/01/29.112."

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 29 January '08

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

2354Grabbed MPEC 2008-B61 - Comets C/2007 Y8, 2007 Y9, 2007 Y10, 2008 A3 (SOHO) - see above
2317Grabbed MPEC 2008-B59 - 2007 YV29 - see above
Grabbed MPEC 2008-B60 - 2005 BT1 - see above
1529Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
1528Grabbed MPEC 2008-B58 - Daily Orbit Update - see above
0100Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
Noted that JPL Sentry has removed 2008 AS28 as an impact risk - see above