Contents  on 12 February '08

Resources:

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 12 February '08

The MPC's NEO Confirmation Page has 25 listings: 4 new, 21 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and 21 updated listings. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 29 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 12 February '08

Minor Planet Electronic Circulars

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


<< DOU on 12 Feb. '08 >>  MPEC 2008-C77 - "07:08 UT" - Daily Orbit Update


MPEC 2008-C76 - "04:32 UT" - 2008 CM74


MPEC 2008-C75 - "03:34 UT" - 2007 XV50

Observers  on 12 February '08

A total of 28 observing facilities appear in today's MPECs.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-C77 -- 68359
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2008-C77 -- 2008 AF4, 2005 EK70
B48Bocholt Obs. in Germany, 1 in MPEC 2008-C77 -- 68359
703Catalina Sky Survey (CSS) in Arizona, 10 in MPEC 2008-C77 -- 2007 YX1, 2006 DU62, 2004 XP164, 2004 NC9, 2002 CF26, 1993 TQ2, 85275, 144901, 138175, 7092
H98Dark Roseanne Obs. in Connecticut, 1 in MPEC 2008-C77 -- 153591
448Desert Moon Obs. in New Mexico, 3 in MPEC 2008-C77 -- 2008 CK70, 2008 CH, 2008 CD70
151Eschenberg Obs. in Switzerland, 3 in MPEC 2008-C77 -- 2008 BT18, 2008 BD15, 4450
683Goodricke-Pigott Obs. in Arizona, 3 in MPEC 2008-C77 -- 162038, 3288, 1864
J95Great Shefford Obs. in England, 1 in MPEC 2008-C77 -- 2008 CD70
A17Guidestar Obs. in Germany, 1 in MPEC 2008-C77 -- 153591
701Junk Bond Obs. in Arizona, 1 in MPEC 2008-C77 -- 2008 CN70
246KLENOT in the Czech Republic, 2 in MPEC 2008-C77 -- 2008 CK70, 2008 CB22
046Klet Obs. in the Czech Republic, 1 in MPEC 2008-C77 -- 2008 AF4
704LINEAR in New Mexico, 16 in MPECs 2008-C76 & 2008-C77 -- 2008 CM74, 2008 CL70, 2008 CL20, 2008 CK70, 2008 CE22, 2008 CD70, 2008 CD22, 2008 CC6, 2007 YK, 2003 EE16, 96189, 173561, 162038, 9400, 5131, 3288
699LONEOS in Arizona, 3 in MPEC 2008-C77 -- 96189, 138013, 4450
560Madonna di Dossobuono Obs. in Italy, 4 in MPEC 2008-C77 -- 2008 CL20, 2008 CD22, 2004 AR1, 4450
J46Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2008-C77 -- 5131
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2008-C76 & 2008-C77 -- 2008 CM74, 2008 CJ70, 2008 CG, 2008 AM33, 2007 QE3, 2000 DP107, 1998 FX134, 141432, 5646, 3691
675Mt. Palomar in southern California, 1 in MPEC 2008-C75 -- 2007 XV50
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2008-C77 -- 2008 CP, 2008 BT18, 2008 AF4, 2008 AE, 2007 YK, 2007 TU24, 2007 TG8, 11398, 1620
B04Saint-Barthelemy Obs. in Italy, 2 in MPEC 2008-C77 -- 153591, 4450
233San Vito Obs. in Italy, 2 in MPEC 2008-C77 -- 2005 TU45, 2005 EK70
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2008-C77 -- 2003 WC25, 2003 EE16, 22099
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2008-C77 -- 2008 CZ21, 2008 CE6, 2008 CE22, 2008 CB6, 2008 BO16, 2008 AF4, 2007 YV56
A78Stia Obs. in Italy, 4 in MPEC 2008-C77 -- 2008 CY4, 2008 CP, 2008 BH16, 1993 TQ2
0122Thierry Pauwels via Uccle Obs. in Belgium, 3 in MPEC 2008-C77 -- 2008 CL20, 2008 CE22, 2008 CD22
G72University Hills Obs. in southern California, 5 in MPEC 2008-C77 -- 2008 CN1, 2008 AF4, 2007 TU24, 2007 TG8, 2006 DU62
A48Verona Obs. in Italy, 2 in MPEC 2008-C77 -- 2008 CP, 2008 BT18

Impact Risk Monitoring  on 12 February '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.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2008 CM74NEODyS16112072-208973.06e-07-8.37-8.480NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2008/02/08.369 to 2008/02/11.379."
JPL Sentry06222084-209755.9e-07-8.10-8.160JPL: "Analysis based on 14 observations spanning 3.0101 days (2008-Feb-08.36778 to 2008-Feb-11.37789)." Diameter approximately 0.008 km. from mean, weighted H=28.0.
2008 CC71NEODyS16112033-2086679.33e-05-3.96-4.530NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/02/09.397 to 2008/02/11.451."
2008 CK70NEODyS16112030-203231.82e-04-3.34-3.340NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2008/02/09.342 to 2008/02/12.031."
JPL Sentry16102030-203221.9e-04-3.33-3.330JPL: "Analysis based on 48 observations spanning 2.6897 days (2008-Feb-09.34106 to 2008-Feb-12.03072)." Diameter approximately 0.032 km. from mean, weighted H=25.1.
2008 CE22JPL Sentry1610R E M O V E DJPL: Risk listing removed at 1052 UTC.
2008 CB22JPL Sentry1610R E M O V E DJPL: Risk listing removed at 1302 UTC.
2008 CZ21JPL Sentry1610R E M O V E DJPL: Risk listing removed at 1222 UTC.
NEODyS1610R E M O V E D
2008 CB6JPL Sentry16102066-210764.7e-06-6.67-6.730JPL: "Analysis based on 29 observations spanning 4.9389 days (2008-Feb-07.29202 to 2008-Feb-12.2309)." Diameter approximately 0.013 km. from mean, weighted H=27.0.
NEODyS1610R E M O V E D
2008 BO16NEODyS1611204518.26e-07-4.54-4.540NEODyS: "Based on 55 optical observations (of which 3 are rejected as outliers) from 2008/01/30.382 to 2008/02/12.218."
JPL Sentry1610204515.5e-07-4.72-4.720JPL: "Analysis based on 54 observations spanning 12.836 days (2008-Jan-30.38083 to 2008-Feb-12.21702)." Diameter approximately 0.090 km. from mean, weighted H=22.9.
2008 AF4NEODyS16112078-2090171.18e-05-2.59-2.700NEODyS: "Based on 480 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/11.988."
JPL Sentry16102078-2101272.2e-05-2.35-2.700JPL: "Analysis based on 476 observations spanning 32.591 days (2008-Jan-10.39652 to 2008-Feb-11.98771)." Diameter approximately 0.390 km. from mean, weighted H=19.7.

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 12 February '08

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

1611Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Noted that NEODyS has updated its 2008 BO16 risk assessment - see above
Noted that NEODyS has updated its 2008 CK70 risk assessment - see above
Grabbed MPEC 2008-C77 - Daily Orbit Update - see above
1610Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
Noted that JPL Sentry has updated its 2008 BO16 risk assessment - see above
Noted that JPL Sentry has removed 2008 CB22 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 CB6 risk assessment - see above
Noted that NEODyS has removed 2008 CB6 as an impact risk - see above
Noted that NEODyS has posted 2008 CC71 as an impact risk - see above
Noted that JPL Sentry has removed 2008 CE22 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 CM74 as an impact risk - see above
Noted that JPL Sentry has removed 2008 CZ21 as an impact risk - see above
Noted that NEODyS has removed 2008 CZ21 as an impact risk - see above
0622Noted that JPL Sentry has posted 2008 CM74 as an impact risk - see above
0504Grabbed MPEC 2008-C76 - 2008 CM74 - see above
0337Grabbed MPEC 2008-C75 - 2007 XV50 - see above