Contents  on 2 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 2 February '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, eight were "one nighters." So far The Tracking News has counted a total of 26 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 2 February '08

Minor Planet Electronic Circulars

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


MPEC 2008-C15 - "23:00 UT" - 2008 CQ


MPEC 2008-C14 - "22:58 UT" - 2008 CP


MPEC 2008-C13 - "22:55 UT" - 2008 CO


MPEC 2008-C12 - "19:02 UT" - 2008 CM


MPEC 2008-C11 - "16:17 UT" - 2008 CK


MPEC 2008-C10 - "16:14 UT" - 2008 CJ


MPEC 2008-C09 - "15:19 UT" - 2008 CH


MPEC 2008-C08 - "15:16 UT" - 2008 CG


MPEC 2008-C07 - "15:14 UT" - 2008 CF


MPEC 2008-C06 - "15:08 UT" - 2001 BE16


MPEC 2008-C05 - "13:36 UT" - 2006 WW


<< DOU on 2 Feb. '08 >>  MPEC 2008-C04 - "07:08 UT" - Daily Orbit Update

Observers  on 2 February '08

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

CodeObserver / observatory
J94Abbeydale Obs., 1 in MPEC 2008-C04 -- 5131
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2008-C05 -- 2006 WW
703Catalina Sky Survey (CSS) in Arizona, 9 in MPECs 2008-C04, 2008-C09, 2008-C12 & 2008-C14 -- 2008 CP, 2008 CM, 2008 CH, 2008 AF4, 2007 YB2, 2005 XD1, 2004 XP164, 85275, 3752
151Eschenberg Obs. in Switzerland, 1 in MPEC 2008-C15 -- 2008 CQ
B21Gaisberg Obs. in Austria, 1 in MPEC 2008-C13 -- 2008 CO
143Gnosca Obs. in Switzerland, 3 in MPECs 2008-C04, 2008-C14 & 2008-C15 -- 2008 CQ, 2008 CP, 2007 TU24
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-C04 -- 3288
J95Great Shefford Obs. in England, 7 in MPECs 2008-C04, 2008-C06, 2008-C07, 2008-C08 & 2008-C09 -- 2008 CH, 2008 CG, 2008 CF, 2008 BO16, 2008 BE15, 2008 BD15, 2001 BE16
B34Green Island Obs. in Cyprus, 5 in MPEC 2008-C04 -- 2008 BD15, 2008 AF4, 2007 PU11, 2005 XD1, 2005 TU45
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2008-C04 -- 2008 AF4, 2007 TU24, 2005 TU45
704LINEAR in New Mexico, 6 in MPECs 2008-C04, 2008-C06, 2008-C08 & 2008-C15 -- 2008 CQ, 2008 CG, 2001 BE16, 1993 TQ2, 90403, 152942
J87La Canada Obs. in Spain, 2 in MPECs 2008-C12 & 2008-C15 -- 2008 CQ, 2008 CM
711McDonald Obs. in Texas, 1 in MPEC 2008-C09 -- 2008 CH
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2008-C04, 2008-C06, 2008-C07, 2008-C10, 2008-C11, 2008-C12 & 2008-C13 -- 2008 CO, 2008 CM, 2008 CK, 2008 CJ, 2008 CF, 2008 BP16, 2008 BD15, 2007 PS9, 2002 AU5, 2001 BE16, 24445
B58Polaris Obs., 4 in MPEC 2008-C04 -- 2008 BH16, 2008 BD15, 2007 TU24, 142464
854Sabino Canyon Obs. in Arizona, 7 in MPECs 2008-C06, 2008-C08, 2008-C09, 2008-C11, 2008-C12, 2008-C13 & 2008-C14 -- 2008 CP, 2008 CO, 2008 CM, 2008 CK, 2008 CH, 2008 CG, 2001 BE16
H85Silver Spring Obs. in Maryland, 1 in MPEC 2008-C04 -- 2008 AE4
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2008-C04 -- 22099, 3552
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2008-C04 -- 2008 BO16, 2008 BN16, 2008 BE, 2008 BD15, 2008 AX1, 2007 YM56
6735Jim Young via Table Mtn. Obs. in southern California, 7 in MPECs 2008-C04, 2008-C06, 2008-C08, 2008-C09 & 2008-C11 -- 2008 CK, 2008 CH, 2008 CG, 2008 BH16, 2008 BE15, 2008 BD15, 2001 BE16

Impact Risk Monitoring  on 2 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 CKJPL Sentry20422072-210499.5e-09-8.80-9.300JPL: "Analysis based on 15 observations spanning .05877 days (2008-Feb-02.39323 to 2008-Feb-02.452)." Diameter approximately 0.020 km. from mean, weighted H=26.2.
2008 CJJPL Sentry19382028-2106251.2e-07-7.93-8.450JPL: "Analysis based on 10 observations spanning .18318 days (2008-Feb-02.24586 to 2008-Feb-02.42904)." Diameter approximately 0.012 km. from mean, weighted H=27.2.
2008 BT18NEODyS19392011-20901252.33e-07-2.87-3.090NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2008/01/31.414 to 2008/02/01.920."
JPL Sentry04142011-21072035.4e-07-2.56-2.820JPL: "Analysis based on 14 observations spanning 1.5061 days (2008-Jan-31.41308 to 2008-Feb-01.91922)." Diameter approximately 0.779 km. from mean, weighted H=18.2.
2008 BO16NEODyS16042045-208051.69e-06-4.28-4.310NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2008/01/30.382 to 2008/02/02.046."
JPL Sentry16032045-207961.9e-06-4.24-4.260JPL: "Analysis based on 17 observations spanning 2.6645 days (2008-Jan-30.38083 to 2008-Feb-02.04538)." Diameter approximately 0.086 km. from mean, weighted H=23.0.
2008 BN16NEODyS16042067-2086124.14e-07-6.73-7.070NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2008/01/30.248 to 2008/02/01.292."
JPL Sentry16032067-2102124.1e-07-6.78-7.260JPL: "Analysis based on 17 observations spanning 2.0432 days (2008-Jan-30.24765 to 2008-Feb-01.29089)." Diameter approximately 0.022 km. from mean, weighted H=25.9.
2008 BE15JPL Sentry1603R E M O V E DJPL: Risk listing removed at 1048 UTC.
2008 BD15JPL Sentry1603204211.5e-08-5.53-5.530JPL: "Analysis based on 47 observations spanning 2.9232 days (2008-Jan-30.31301 to 2008-Feb-02.23619)." Diameter approximately 0.220 km. from mean, weighted H=20.9.
NEODyS1603R E M O V E D
2008 AF4NEODyS16042078-2090114.7e-06-3.03-3.150NEODyS: "Based on 348 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/01.632."
JPL Sentry16032078-2100291.8e-05-2.47-3.110JPL: "Analysis based on 344 observations spanning 22.235 days (2008-Jan-10.39652 to 2008-Feb-01.63106)." Diameter approximately 0.380 km. from mean, weighted H=19.8.

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 2 February '08

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

2304Grabbed MPEC 2008-C13 - 2008 CO - see above
Grabbed MPEC 2008-C14 - 2008 CP - see above
Grabbed MPEC 2008-C15 - 2008 CQ - see above
2042Noted that JPL Sentry has posted 2008 CK as an impact risk - see above
1938Noted that NEODyS has posted 2008 BT18 as an impact risk - see above
Noted that JPL Sentry has posted 2008 CJ as an impact risk - see above
Grabbed MPEC 2008-C12 - 2008 CM - see above
1700Grabbed MPEC 2008-C10 - 2008 CJ - see above
Grabbed MPEC 2008-C11 - 2008 CK - see above
1604Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Noted that NEODyS has updated its 2008 BN16 risk assessment - see above
Noted that NEODyS has updated its 2008 BO16 risk assessment - see above
Grabbed MPEC 2008-C04 - Daily Orbit Update - see above
1603Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
Noted that JPL Sentry has updated its 2008 BD15 risk assessment - see above
Noted that NEODyS has removed 2008 BD15 as an impact risk - see above
Noted that JPL Sentry has removed 2008 BE15 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 BN16 risk assessment - see above
Noted that JPL Sentry has updated its 2008 BO16 risk assessment - see above
Grabbed MPEC 2008-C05 - 2006 WW - see above
Grabbed MPEC 2008-C06 - 2001 BE16 - see above
Grabbed MPEC 2008-C07 - 2008 CF - see above
Grabbed MPEC 2008-C08 - 2008 CG - see above
Grabbed MPEC 2008-C09 - 2008 CH - see above
0414Noted that JPL Sentry has posted 2008 BT18 as an impact risk - see above