Contents  on 29 March '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 March '08

The MPC's NEO Confirmation Page has 9 listings: 3 new, 6 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and six updated listings. Of these, six were "one nighters." So far The Tracking News has counted a total of fourteen objects listed on the NEOCP at some point today.

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 29 March '08

Minor Planet Electronic Circulars

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

MPEC 2008-F54 - "20:53 UT" - 2006 FK9

<< DOU on 29 Mar. '08 >>  MPEC 2008-F53 - "06:07 UT" - Daily Orbit Update

MPEC 2008-F52 - "03:34 UT" - 2008 FH5

MPEC 2008-F51 - "02:57 UT" - 2008 FG5

MPEC 2008-F50 - "02:33 UT" - 2008 FF5

MPEC 2008-F49 - "02:26 UT" - 2008 FE5

Observers  on 29 March '08

Fifteen observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2008-F54 -- 2006 FK9
113Drebach Obs. in Germany, 5 in MPEC 2008-F53 -- 2008 EE85, 2000 DP107, 143678, 138127, 3554
143Gnosca Obs. in Switzerland, 1 in MPEC 2008-F54 -- 2006 FK9
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-F53 -- 53319
J95Great Shefford Obs. in England, 6 in MPECs 2008-F49, 2008-F50, 2008-F52 & 2008-F53 -- 2008 FP, 2008 FN, 2008 FH5, 2008 FG5, 2008 FF5, 2008 FE5
H51Greiner Research Obs. (GRO) in Wisconsin, 8 in MPEC 2008-F53 -- 2008 EM9, 2008 EM85, 2008 EE85, 2008 BC22, 2006 BG55, 2005 NB7, 2005 BE2, 2003 GW
B15Inastars Obs. in Germany, 1 in MPEC 2008-F53 -- 22099
704LINEAR in New Mexico, 10 in MPEC 2008-F53 -- 2008 FO, 2007 VQ4, 2007 TG8, 2005 BE2, 2004 CR2, 86324, 54686, 18736, 6037, 5604
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2008-F49, 2008-F50, 2008-F51, 2008-F52, 2008-F53 & 2008-F54 -- 2008 FH5, 2008 FG5, 2008 FF5, 2008 FE5, 2007 NS4, 2006 FK9, 180186, 13553
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2008-F50 & 2008-F51 -- 2008 FG5, 2008 FF5
204Schiaparelli Obs. in Italy, 4 in MPEC 2008-F53 -- 2008 FP, 2008 FG5, 2008 FF5, 2008 FE5
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2008-F53 -- 2005 SR1, 2004 RY109, 162039
291Spacewatch 1.8m telescope in Arizona, 12 in MPEC 2008-F53 -- 2008 FG, 2008 FF5, 2008 EW5, 2008 ER7, 2008 ER, 2008 EA9, 2008 DX, 2008 DW, 2008 DH23, 2005 YP180, 2005 MP13, 2003 HU42
147Suno Obs. in Italy, 2 in MPECs 2008-F50 & 2008-F51 -- 2008 FG5, 2008 FF5
F85Tiki Obs. in Tahiti, 1 in MPEC 2008-F51 -- 2008 FG5

Impact Risk Monitoring  on 29 March '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 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 FF5NEODyS14532029-208773.65e-07-4.80-5.180NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2008/03/28.323 to 2008/03/29.220."
JPL Sentry05102017-2102168.7e-08-5.29-5.700JPL: "Analysis based on 19 observations spanning .68517 days (2008-Mar-28.32219 to 2008-Mar-29.00736)." Diameter approximately 0.085 km. from mean, weighted H=23.0.
2008 FNNEODyS14532010-2086349.14e-09-3.94-4.740NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2008/03/27.460 to 2008/03/29.173."
2008 FKNEODyS1453203611.05e-06-6.76-6.760NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2008/03/27.253 to 2008/03/28.280."
2008 EA9NEODyS14532061-2089264.3e-05-6.06-6.640NEODyS: "Based on 46 optical observations (of which 1 are rejected as outliers) from 2008/03/06.406 to 2008/03/28.305."
2008 ER7NEODyS14532077-208426.84e-07-3.75-3.950NEODyS: "Based on 62 optical observations (of which 0 are rejected as outliers) from 2008/03/06.337 to 2008/03/29.186."

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 March '08

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

2101Grabbed MPEC 2008-F54 - 2006 FK9 - see above
1453Noted that NEODyS has updated its 2008 EA9 risk assessment - see above
Noted that NEODyS has updated its 2008 ER7 risk assessment - see above
1452Noted that NEODyS has posted 2008 FF5 as an impact risk - see above
Noted that NEODyS has posted 2008 FK as an impact risk - see above
Noted that NEODyS has posted 2008 FN as an impact risk - see above
Grabbed MPEC 2008-F53 - Daily Orbit Update - see above
0510Noted that JPL Sentry has posted 2008 FF5 as an impact risk - see above
Grabbed MPEC 2008-F49 - 2008 FE5 - see above
Grabbed MPEC 2008-F50 - 2008 FF5 - see above
Grabbed MPEC 2008-F51 - 2008 FG5 - see above
Grabbed MPEC 2008-F52 - 2008 FH5 - see above