Contents  on 1 March '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 1 March '08

The MPC's NEO Confirmation Page has 16 listings: 3 new, 13 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and thirteen updated listings. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 33 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 1 March '08

Minor Planet Electronic Circulars

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


MPEC 2008-E10 - "16:33 UT" - Comet C/2007 W1 (Boattini)


MPEC 2008-E09 - "16:23 UT" - Comet C/2007 T1 (McNaught)


MPEC 2008-E08 - "15:18 UT" - 2008 DY22


MPEC 2008-E07 - "15:15 UT" - 2008 DX22


MPEC 2008-E06 - "15:12 UT" - 2008 DW22


MPEC 2008-E05 - "15:10 UT" - 2008 DV22


MPEC 2008-E04 - "15:06 UT" - 2008 DU22


MPEC 2008-E03 - "15:04 UT" - 2008 DT22


<< DOU on 1 Mar. '08 >>  MPEC 2008-E02 - "07:08 UT" - Daily Orbit Update


MPEC 2008-E01 - "03:39 UT" - 2008 DG17

Observers  on 1 March '08

A total of 21 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 7 in MPEC 2008-E02 -- 2008 DV, 2008 DG4, 2008 CX118, 2008 CH70, 2008 BU2, 2008 AZ110, 2008 AV28
J51Atlante Obs. in the Canary Islands, 5 in MPECs 2008-E02 & 2008-E10 -- 2008 CL1, C/2007 W1, 2006 DU62, 153591, 1620
467Auckland Obs. in New Zealand, 2 in MPECs 2008-E09 & 2008-E10 -- C/2007 W1, C/2007 T1
127Bornheim Obs. in Germany, 1 in MPEC 2008-E02 -- 2007 TG8
703Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2008-E01, 2008-E02, 2008-E08 & 2008-E10 -- 2008 DY22, 2008 DG17, 2008 CD22, 2007 YK, C/2007 W1, 2007 TU24, 2005 BE2, 40267, 164222, 11398, 5587
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-E02 -- 162038
651Grasslands Obs. in Arizona, 1 in MPEC 2008-E01 -- 2008 DG17
379Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2008-E02 -- 2008 CN1, 2005 EK70, 2002 TD66, 153591
J37Huelva Obs. in Spain, 1 in MPEC 2008-E02 -- 153591
701Junk Bond Obs. in Arizona, 1 in MPEC 2008-E02 -- 2008 DK5
704LINEAR in New Mexico, 7 in MPECs 2008-E02 & 2008-E04 -- 2008 DU22, 2008 DF5, 2008 BT18, 66251, 138947, 138127, 3288
J34La Fecha Obs. in Spain, 2 in MPEC 2008-E02 -- 152931, 3554
G96Mt. Lemmon Survey (MLS) in Arizona, 13 in MPECs 2008-E01, 2008-E02, 2008-E03, 2008-E05, 2008-E06, 2008-E07 & 2008-E08 -- 2008 DY22, 2008 DX22, 2008 DW22, 2008 DV22, 2008 DT22, 2008 DG17, 2007 DA, 2003 YQ94, 39565, 18736, 175921, 159495, 3102
649Powell Obs. in Kansas, 2 in MPECs 2008-E04 & 2008-E07 -- 2008 DX22, 2008 DU22
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-E04 -- 2008 DU22
B61Sant Cugat del Valles Obs., 1 in MPEC 2008-E02 -- 1685
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2008-E02 & 2008-E09 -- 2008 CG119, C/2007 T1, 53789
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2008-E02 & 2008-E10 -- 2008 DW, C/2007 W1, 2004 CR2
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2008-E01, 2008-E02, 2008-E03 & 2008-E05 -- 2008 DV22, 2008 DV, 2008 DT22, 2008 DG4, 2008 DG17, 2008 DB, 2008 DA4, 18736
B18Terskol Obs., 2 in MPEC 2008-E02 -- 2002 TD66, 153591
G72University Hills Obs. in southern California, 3 in MPEC 2008-E02 -- 2008 CN1, 2008 CL1, 2006 DU62

Impact Risk Monitoring  on 1 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.
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 DX22JPL Sentry17382010-207748.8e-10-7.73-7.790JPL: "Analysis based on 16 observations spanning 1.0055 days (2008-Feb-29.28655 to 2008-Mar-01.29205)." Diameter approximately 0.038 km. from mean, weighted H=24.8.
2008 DW22JPL Sentry17022028-210062.2e-09-8.37-8.770JPL: "Analysis based on 12 observations spanning 2.1097 days (2008-Feb-28.28619 to 2008-Mar-01.3959)." Diameter approximately 0.040 km. from mean, weighted H=24.6.
2008 DK5JPL Sentry1526R E M O V E DJPL: Risk listing removed at 1057 UTC.
2008 DJ5NEODyS15282010-2090472.49e-08-5.24-5.850NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2008/02/28.405 to 2008/02/29.446."
2008 DG5NEODyS17382013-2090881.05e-07-3.93-4.690NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/02/28.279 to 2008/02/29.343."
2008 DG4JPL Sentry1526R E M O V E DJPL: Risk listing removed at 1131 UTC.
NEODyS1526R E M O V E D
2008 DA4NEODyS15272080-208825.33e-08-6.97-7.140NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2008/02/27.281 to 2008/02/29.471."
JPL Sentry15262080-210049.3e-07-5.76-5.870JPL: "Analysis based on 22 observations spanning 2.1893 days (2008-Feb-27.28072 to 2008-Feb-29.46998)." Diameter approximately 0.053 km. from mean, weighted H=24.0.
2008 DVNEODyS1526R E M O V E D
2008 DBNEODyS15282046-2089293.17e-05-4.89-4.960NEODyS: "Based on 56 optical observations (of which 2 are rejected as outliers) from 2008/02/18.243 to 2008/02/29.487."
JPL Sentry15262046-2108245.1e-05-4.70-4.770JPL: "Analysis based on 55 observations spanning 11.244 days (2008-Feb-18.242 to 2008-Feb-29.48596)." Diameter approximately 0.025 km. from mean, weighted H=25.7.

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 1 March '08

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

1738Noted that NEODyS has posted 2008 DG5 as an impact risk - see above
Noted that JPL Sentry has posted 2008 DX22 as an impact risk - see above
1702Noted that JPL Sentry has posted 2008 DW22 as an impact risk - see above
Grabbed MPEC 2008-E10 - Comet C/2007 W1 (Boattini) - see above
1632Grabbed MPEC 2008-E09 - Comet C/2007 T1 (McNaught) - see above
1528Noted that NEODyS has updated its 2008 DB risk assessment - see above
1527Noted that NEODyS has updated its 2008 DA4 risk assessment - see above
Grabbed MPEC 2008-E02 - Daily Orbit Update - see above
1526Noted that JPL Sentry has updated its 2008 DA4 risk assessment - see above
Noted that JPL Sentry has updated its 2008 DB risk assessment - see above
Noted that JPL Sentry has removed 2008 DG4 as an impact risk - see above
Noted that NEODyS has removed 2008 DG4 as an impact risk - see above
Noted that NEODyS has posted 2008 DJ5 as an impact risk - see above
Noted that JPL Sentry has removed 2008 DK5 as an impact risk - see above
Noted that NEODyS has removed 2008 DV as an impact risk - see above
Grabbed MPEC 2008-E03 - 2008 DT22 - see above
Grabbed MPEC 2008-E04 - 2008 DU22 - see above
Grabbed MPEC 2008-E05 - 2008 DV22 - see above
Grabbed MPEC 2008-E06 - 2008 DW22 - see above
Grabbed MPEC 2008-E07 - 2008 DX22 - see above
Grabbed MPEC 2008-E08 - 2008 DY22 - see above
0552Grabbed MPEC 2008-E01 - 2008 DG17 - see above