Contents  on 15 February '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 15 February '08

The MPC's NEO Confirmation Page has 8 listings: 4 new, 4 updated

When last checked at 1659 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and four updated listings. Of these, seven were "one nighters." So far The Tracking News has counted a total of ten 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 15 February '08

Minor Planet Electronic Circulars

As of last check at 1659 UTC, there have been three MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 15 Feb. '08 >>  MPEC 2008-C106 - "07:10 UT" - Daily Orbit Update

MPEC 2008-C105 - "03:53 UT" - 2008 CK119

MPEC 2008-C104 - "03:44 UT" - 2008 CJ119

Observers  on 15 February '08

Eighteen observing facilities appear in today's MPECs.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-C106 -- 68359
H55Astronomical Research Obs. (ARO) in Illinois, 3 in MPECs 2008-C104, 2008-C105 & 2008-C106 -- 2008 CK119, 2008 CJ119, 2008 CC119
A81Balzaretto Obs. in Italy, 3 in MPEC 2008-C106 -- 2005 EK70, 170891, 153591
703Catalina Sky Survey (CSS) in Arizona, 8 in MPEC 2008-C106 -- 2008 CS116, 2008 CN1, 2008 CD22, 2003 DN4, 2002 CF26, 40267, 35107, 162510
143Gnosca Obs. in Switzerland, 1 in MPEC 2008-C105 -- 2008 CK119
683Goodricke-Pigott Obs. in Arizona, 3 in MPEC 2008-C106 -- 162038, 3288, 1864
J95Great Shefford Obs. in England, 3 in MPEC 2008-C106 -- 2008 CN116, 2008 CK116, 2008 CD70
B15Inastars Obs. in Germany, 1 in MPEC 2008-C106 -- 175189
046Klet Obs. in the Czech Republic, 16 in MPEC 2008-C106 -- 2008 CP, 2008 CN1, 2008 CL20, 2008 CL1, 2008 CK70, 2008 CH, 2008 BD15, 2008 AF4, 2008 AE, 2007 YK, 2007 TU24, 2005 TU45, 2005 BE2, 2003 EE16, 2002 CF26, 1989 AZ
704LINEAR in New Mexico, 2 in MPECs 2008-C104 & 2008-C105 -- 2008 CK119, 2008 CJ119
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2008-C104 & 2008-C106 -- 2008 CJ119, 2008 CE5
A13Naef Obs. in Switzerland, 1 in MPEC 2008-C106 -- 11398
A24New Millennium Obs. in Italy, 1 in MPEC 2008-C105 -- 2008 CK119
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2008-C104 -- 2008 CJ119
E12Siding Spring Survey in New South Wales, 1 in MPEC 2008-C106 -- 2008 CN70
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2008-C106 -- 2008 CJ70, 2008 AU26
A78Stia Obs. in Italy, 4 in MPEC 2008-C106 -- 2008 CN1, 2008 CL1, 2008 CD22, 2008 AE
F85Tiki Obs. in Tahiti, 1 in MPEC 2008-C106 -- 2008 CC6

Impact Risk Monitoring  on 15 February '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 1659 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 CG119NEODyS1512204112.29e-11-6.85-6.850NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2008/02/13.428 to 2008/02/14.434."
2008 CC119JPL Sentry1511R E M O V E DJPL: Risk listing removed at 1127 UTC.
2008 CR118NEODyS15122017-2089406.1e-07-3.21-3.970NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2008/02/10.352 to 2008/02/13.350."
2008 CK70NEODyS15122030-204442.77e-04-3.17-3.170NEODyS: "Based on 73 optical observations (of which 0 are rejected as outliers) from 2008/02/09.342 to 2008/02/13.995."
JPL Sentry1511203012.8e-04-3.16-3.160JPL: "Analysis based on 73 observations spanning 4.6530 days (2008-Feb-09.34106 to 2008-Feb-13.99407)." Diameter approximately 0.032 km. from mean, weighted H=25.1.
2008 AF4JPL Sentry15112078-2101242.1e-05-2.37-2.610JPL: "Analysis based on 507 observations spanning 34.531 days (2008-Jan-10.39652 to 2008-Feb-13.92722)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
NEODyS15112078-209091.33e-05-2.55-2.620NEODyS: "Based on 511 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/13.928."

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 15 February '08

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

1512Noted that NEODyS has updated its 2008 CK70 risk assessment - see above
1511Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Noted that JPL Sentry has removed 2008 CC119 as an impact risk - see above
Noted that NEODyS has posted 2008 CG119 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 CK70 risk assessment - see above
Noted that NEODyS has posted 2008 CR118 as an impact risk - see above
Grabbed MPEC 2008-C106 - Daily Orbit Update - see above
0554Grabbed MPEC 2008-C104 - 2008 CJ119 - see above
Grabbed MPEC 2008-C105 - 2008 CK119 - see above