Contents  on 26 February '08


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NEOCP Activity  on 26 February '08

The MPC's NEO Confirmation Page has 5 listings: 1 new, 4 updated

When last checked at 2303 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and four updated listings. Of these, four were "one nighters."

New MPECs  on 26 February '08

Minor Planet Electronic Circulars

There were four MPECs issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-D39 - "23:56 UT" - 2007 TG422, 2007 TH422, 2007 TJ422, 2007 UL126, 2007 VH305

MPEC 2008-D38 - "20:53 UT" - 2007 UK126

MPEC 2008-D37 - "19:14 UT" - 2007 XA51

<< DOU on 26 Feb. '08 >>  MPEC 2008-D36 - "07:07 UT" - Daily Orbit Update

Observers  on 26 February '08

Seventeen observing facilities appeared in this day's MPECs.

CodeObserver / observatory
169Airali Obs., 1 in MPEC 2008-D36 -- 3288
705Apache Point Obs. in New Mexico, 5 in MPEC 2008-D39 -- 2007 VH305, 2007 UL126, 2007 TJ422, 2007 TH422, 2007 TG422
H55Astronomical Research Obs. (ARO) in Illinois, 7 in MPEC 2008-D36 -- 2008 CZ21, 2008 CJ119, 2007 YO56, 2007 YM56, 2007 YF1, 2001 QH142, 1999 AQ10
A81Balzaretto Obs. in Italy, 1 in MPEC 2008-D36 -- 2008 CC6
B50Corner Obs. in Germany, 1 in MPEC 2008-D36 -- 170891
151Eschenberg Obs. in Switzerland, 2 in MPEC 2008-D36 -- 2008 CN1, 2002 TD66
H51Greiner Research Obs. in Wisconsin, 1 in MPEC 2008-D36 -- 2008 CN1
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2008-D36 -- 2008 CN1, 2005 EK70, 153591
246KLENOT in the Czech Republic, 3 in MPEC 2008-D36 -- 2008 CR116, 2008 CN1, 2006 YF13
704LINEAR in New Mexico, 3 in MPEC 2008-D36 -- 2008 CN1, 89830, 66407
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2008-D36, 2008-D37 & 2008-D39 -- 2007 XA51, 2007 VH305, 173561
675Mt. Palomar in southern California, 1 in MPEC 2008-D38 -- 2007 UK126
A13Naef Obs. in Switzerland, 2 in MPEC 2008-D36 -- 2008 CR118, 2000 DP107
461SZTE Asteroid Program (SZTE) in Hungary, 2 in MPEC 2008-D36 -- 2002 JC, 2000 ER70
B61Sant Cugat del Valles Obs., 3 in MPEC 2008-D36 -- 170891, 11398, 1620
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2008-D36 -- 2008 CN70, 2008 CG119
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2008-D36 -- 2008 DB, 2008 CJ116, 2008 CH1, 2007 LS, 2003 RM10, 2003 AA3

Impact Risk Monitoring  on 26 February '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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 DJNEODyS16182022-205849.07e-09-5.05-5.090NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2008/02/25.338 to 2008/02/25.963."
JPL Sentry02572011-2106773.4e-07-3.65-4.320JPL: "Analysis based on 18 observations spanning .62523 days (2008-Feb-25.33729 to 2008-Feb-25.96252)." Diameter approximately 0.323 km. from mean, weighted H=20.1.
2008 DBJPL Sentry16182046-2096203.7e-05-4.82-4.890JPL: "Analysis based on 46 observations spanning 7.9662 days (2008-Feb-18.242 to 2008-Feb-26.20822)." Diameter approximately 0.025 km. from mean, weighted H=25.6.
NEODyS16182046-2089282.27e-05-5.04-5.120NEODyS: "Based on 47 optical observations (of which 2 are rejected as outliers) from 2008/02/18.243 to 2008/02/26.209."
2008 AO112NEODyS1858202511.63e-09-6.21-6.210NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2008/01/11.090 to 2008/01/12.099."

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 26 February '08

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

0032 2/27Grabbed MPEC 2008-D39 - 2007 TG422, 2007 TH422, 2007 TJ422, 2007 UL126, 2007 VH305 - see above
2057Grabbed MPEC 2008-D38 - 2007 UK126 - see above
1958Grabbed MPEC 2008-D37 - 2007 XA51 - see above
1858Noted that NEODyS has posted 2008 AO112 as an impact risk - see above
1619Grabbed MPEC 2008-D36 - Daily Orbit Update - see above
1618Noted that JPL Sentry has updated its 2008 DB risk assessment - see above
Noted that NEODyS has updated its 2008 DB risk assessment - see above
Noted that NEODyS has posted 2008 DJ as an impact risk - see above
0257Noted that JPL Sentry has posted 2008 DJ as an impact risk - see above