Contents  on 8 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 8 March '08

The MPC's NEO Confirmation Page has 16 listings: 5 new, 11 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had five new and eleven updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of 20 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 8 March '08

Minor Planet Electronic Circulars

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

MPEC 2008-E70 - "23:31 UT" - Comet C/2008 E3 (Garradd)

MPEC 2008-E69 - "17:12 UT" - 2008 EB8

MPEC 2008-E68 - "17:10 UT" - 2008 EA8

MPEC 2008-E67 - "16:54 UT" - 2008 EZ7

<< DOU on 8 Mar. '08 >>  MPEC 2008-E66 - "07:09 UT" - Daily Orbit Update

Observers  on 8 March '08

A total of 20 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2008-E66 -- 2008 EK1, 2008 EJ, 2008 EF, 2008 DV, 2008 BV2
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2008-E66 & 2008-E67 -- 2008 EZ7, 2006 DU62
448Desert Moon Obs. in New Mexico, 7 in MPEC 2008-E66 -- 2008 ES, 2008 DH23, 2008 DD, 2008 CM, 2008 BT18, 2005 EY169, 2005 EA
734Farpoint Obs. in Kansas, 1 in MPEC 2008-E66 -- 2008 AF4
651Grasslands Obs. in Arizona, 1 in MPEC 2008-E67 -- 2008 EZ7
J95Great Shefford Obs. in England, 2 in MPECs 2008-E66 & 2008-E67 -- 2008 EZ7, 2005 EY169
H51Greiner Research Obs. in Wisconsin, 4 in MPEC 2008-E66 -- 2008 EL, 2008 CN1, 2008 CL1, 2007 VQ4
379Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2008-E66 -- 2008 CL1, 2007 TG8, 2005 EK70, 2005 BE2, 2002 TD66
G92Jarnac Obs. in Arizona, 1 in MPEC 2008-E66 -- 162038
701Junk Bond Obs. in Arizona, 2 in MPEC 2008-E66 -- 2008 EP7, 2008 EN7
704LINEAR in New Mexico, 12 in MPEC 2008-E66 -- 2008 EP, 2007 TG8, 2007 RV9, 2003 AK18, 2002 CF26, 2000 DP107, 162173, 154347, 153591, 9856, 9400, 1864
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-E66 -- 2008 CC119
711McDonald Obs. in Texas, 4 in MPECs 2008-E66 & 2008-E67 -- 2008 EZ7, 2008 BT18, 2004 DC, 144922
474Mt. John Obs. in New Zealand, 1 in MPEC 2008-E67 -- 2008 EZ7
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2008-E66, 2008-E68 & 2008-E69 -- 2008 EN6, 2008 EK1, 2008 EB8, 2008 EA8, 2004 HW, 24443
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2008-E66 -- 2008 DA4
D90RAS Obs. Moorook in South Australia, 1 in MPEC 2008-E70 -- C/2008 E3
E12Siding Spring Survey (SSS) in New South Wales, 7 in MPECs 2008-E66, 2008-E67 & 2008-E70 -- 2008 EZ7, 2008 EY5, 2008 EP6, C/2008 E3, 2008 CG119, 6456, 5836
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2008-E66 -- 2008 EE5, 2008 CZ21, 2008 CM20, 2003 ED50
198Wildberg Obs. in Germany, 1 in MPEC 2008-E66 -- 1685

Impact Risk Monitoring  on 8 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 EA8JPL Sentry23072041-208846.6e-08-5.67-5.680JPL: "Analysis based on 15 observations spanning 2.0380 days (2008-Mar-06.25228 to 2008-Mar-08.29028)." Diameter approximately 0.130 km. from mean, weighted H=22.1.
2008 EZ7JPL Sentry1940208619.3e-09-9.22-9.220JPL: "Analysis based on 57 observations spanning 1.0728 days (2008-Mar-07.48916 to 2008-Mar-08.562)." Diameter approximately 0.014 km. from mean, weighted H=26.8.
2008 EO7NEODyS15492008-2084422.65e-09-4.06-4.090NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2008/03/06.299 to 2008/03/07.377."
2008 EM7NEODyS15502014-2090573.72e-07-4.09-4.490NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2008/03/06.258 to 2008/03/07.354."
2008 EN6JPL Sentry15492042-207472.8e-09-6.50-7.050JPL: "Analysis based on 22 observations spanning 1.9529 days (2008-Mar-05.37204 to 2008-Mar-07.32498)." Diameter approximately 0.280 km. from mean, weighted H=20.4.
2008 EE5JPL Sentry1549R E M O V E DJPL: Risk listing removed at 1115 UTC.
2008 DA4JPL Sentry1549210012.6e-07-6.35-6.350JPL: "Analysis based on 49 observations spanning 7.9619 days (2008-Feb-27.28072 to 2008-Mar-06.24262)." Diameter approximately 0.056 km. from mean, weighted H=23.9.
2008 AF4NEODyS15492078-208933.27e-05-2.15-2.151NEODyS: "Based on 576 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/03/08.221. NOTE: The Virtual Impactor in 2089/01/09.479 ... is rated as Torino Scale 1."

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 8 March '08

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

2354Grabbed MPEC 2008-E70 - Comet C/2008 E3 (Garradd) - see above
2307Noted that JPL Sentry has posted 2008 EA8 as an impact risk - see above
1940Noted that JPL Sentry has posted 2008 EZ7 as an impact risk - see above
1736Grabbed MPEC 2008-E67 - 2008 EZ7 - see above
Grabbed MPEC 2008-E68 - 2008 EA8 - see above
Grabbed MPEC 2008-E69 - 2008 EB8 - see above
1550Grabbed MPEC 2008-E66 - Daily Orbit Update - see above
1549Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Noted that JPL Sentry has updated its 2008 DA4 risk assessment - see above
Noted that JPL Sentry has removed 2008 EE5 as an impact risk - see above
Noted that JPL Sentry has posted 2008 EN6 as an impact risk - see above
1548Noted that NEODyS has posted 2008 EM7 as an impact risk - see above
Noted that NEODyS has posted 2008 EO7 as an impact risk - see above