Contents  on 2 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 2 March '08

The MPC's NEO Confirmation Page has 21 listings: 4 new, 17 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and seventeen updated listings. Of these, nine were "one nighters." So far The Tracking News has counted a total of 24 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 March '08

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 2 Mar. '08 >>  MPEC 2008-E11 - "07:08 UT" - Daily Orbit Update

Observers  on 2 March '08

Fourteen observing facilities appear in today's MPEC.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-E11 -- 137170
H55Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2008-E11 -- 2008 DY22, 2008 DX22, 2008 DV22, 2008 DG17, 2003 TM1
B09Capannoli Obs. in Italy, 1 in MPEC 2008-E11 -- 22099
703Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2008-E11 -- 2008 CR116, 2008 CD71, 2007 US6, 2006 DU62, 2003 AK18, 85839, 68346, 21277, 153591
448Desert Moon Obs. in New Mexico, 4 in MPEC 2008-E11 -- 2008 CZ118, 2008 CB22, 2008 AM33, 2003 FH
379Hamamatsu-Yuto Obs. in Japan, 6 in MPEC 2008-E11 -- 2008 CN1, 2008 CL1, 2007 VQ4, 2007 TG8, 2002 TD66, 153591
704LINEAR in New Mexico, 12 in MPEC 2008-E11 -- 2008 DY22, 2008 DJ, 2008 DG17, 2008 BC22, 2008 AE, 2003 TM1, 99935, 86667, 68359, 144901, 143678, 5836
A70Lumijoki Obs. in Finland, 1 in MPEC 2008-E11 -- 2007 TU24
560Madonna di Dossobuono Obs. in Italy, 7 in MPEC 2008-E11 -- 2008 DJ, 2008 CN1, 2008 CL72, 2008 BT18, 2005 EK70, 2002 TD66, 1620
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPEC 2008-E11 -- 2008 DV, 2007 YX1, 2007 DA, 1998 SJ70, 1993 TQ2, 38091, 18736, 154589, 144922, 137099
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 17 in MPEC 2008-E11 -- 2008 DJ, 2008 CN1, 2008 CL1, 2008 CB22, 2008 BT18, 2008 AF4, 2008 AE, 2007 YK, 2007 TU24, 2007 TG8, 2006 DU62, 2005 EK70, 2005 BE2, 2002 TD66, 2000 DP107, 11398, 1620
E12Siding Spring Survey in New South Wales, 1 in MPEC 2008-E11 -- 2003 GW
291Spacewatch 1.8m telescope in Arizona, 10 in MPEC 2008-E11 -- 2008 DW, 2008 DV, 2008 DJ5, 2008 DG5, 2008 DG4, 2008 CO, 2008 CK119, 2008 CA22, 2005 GP21, 2002 AJ129
A48Verona Obs. in Italy, 3 in MPEC 2008-E11 -- 2008 CL1, 2008 CD22, 153591

Impact Risk Monitoring  on 2 March '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2355 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 Sentry1622R E M O V E DJPL: Risk listing removed at 1138 UTC.
2008 DW22NEODyS16232028-208565.25e-10-9.13-9.450NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2008/02/28.287 to 2008/03/01.397."
2008 DJ5JPL Sentry16232029-2107741.7e-06-4.01-4.050JPL: "Analysis based on 15 observations spanning 1.9550 days (2008-Feb-28.40456 to 2008-Mar-01.35952)." Diameter approximately 0.201 km. from mean, weighted H=21.2.
NEODyS16232012-2072105.61e-08-5.14-5.230NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/02/28.405 to 2008/03/01.360."
2008 DG5JPL Sentry16232011-2105454.0e-08-4.37-4.680JPL: "Analysis based on 18 observations spanning 1.9681 days (2008-Feb-28.2778 to 2008-Mar-01.24587)." Diameter approximately 0.482 km. from mean, weighted H=19.2.
NEODyS16232028-203821.42e-09-5.96-6.080NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2008/02/28.279 to 2008/03/01.247."
2008 AF4JPL Sentry18002078-2100123.0e-05-2.19-2.291JPL: "Analysis based on 557 observations spanning 50.910 days (2008-Jan-10.39652 to 2008-Mar-01.30627)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
NEODyS16232078-208932.37e-05-2.29-2.291NEODyS: "Based on 561 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/03/01.307. NOTE: The Virtual Impactor in 2089/01/09.478 in the table above is rated as Torino Scale 1."

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 March '08

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

1800Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
1623Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Noted that NEODyS has updated its 2008 DG5 risk assessment - see above
Noted that NEODyS has updated its 2008 DJ5 risk assessment - see above
Grabbed MPEC 2008-E11 - Daily Orbit Update - see above
1622Noted that JPL Sentry has updated its 2008 DG5 risk assessment - see above
Noted that JPL Sentry has updated its 2008 DJ5 risk assessment - see above
Noted that NEODyS has posted 2008 DW22 as an impact risk - see above
Noted that JPL Sentry has removed 2008 DX22 as an impact risk - see above