Contents  on 4 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 4 March '08

The MPC's NEO Confirmation Page has 10 listings: 4 new, 6 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and six updated listings. Of these, nine were "one nighters." So far The Tracking News has counted a total of nineteen 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 4 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-E44 - "22:58 UT" - 2007 VL305


MPEC 2008-E43 - "22:50 UT" - 2007 VK305


MPEC 2008-E42 - "20:13 UT" - 2008 EE5


MPEC 2008-E41 - "17:55 UT" - Comet C/2008 E1 (Catalina)


MPEC 2008-E40 - "14:09 UT" - 2008 EK1


MPEC 2008-E39 - "14:06 UT" - 2008 EJ1


MPEC 2008-E38 - "14:03 UT" - 2008 EH1


<< DOU on 4 Mar. '08 >>  MPEC 2008-E37 - "07:08 UT" - Daily Orbit Update


MPEC 2008-E36 - "04:24 UT" - 2006 QP180


MPEC 2008-E35 - "04:16 UT" - 2004 PG115

Observers  on 4 March '08

A total of 22 observing facilities appear in today's MPECs.

CodeObserver / observatory
705Apache Point Obs. in New Mexico, 4 in MPECs 2008-E35, 2008-E36, 2008-E43 & 2008-E44 -- 2007 VL305, 2007 VK305, 2006 QP180, 2004 PG115
H55Astronomical Research Obs. (ARO) in Illinois, 2 in MPECs 2008-E37 & 2008-E41 -- C/2008 E1, 2008 DJ
703Catalina Sky Survey (CSS) in Arizona, 16 in MPECs 2008-E37, 2008-E40 & 2008-E41 -- 2008 EK1, C/2008 E1, 2008 CL72, 2008 CL1, 2007 TG8, 2005 EA, 2002 SS41, 2002 CF26, 2000 DP107, 85709, 85275, 22099, 153591, 137158, 3552, 1866
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2008-E37 -- 170891
J95Great Shefford Obs. in England, 5 in MPECs 2008-E37, 2008-E41 & 2008-E42 -- 2008 ES, 2008 EQ, 2008 EE5, C/2008 E1, 2008 DY22
H51Greiner Research Obs. in Wisconsin, 1 in MPEC 2008-E40 -- 2008 EK1
682Kanab Obs. in Utah, 1 in MPEC 2008-E41 -- C/2008 E1
699LONEOS in Arizona, 3 in MPEC 2008-E37 -- 2008 CD22, 2006 DU62, 5587
711McDonald Obs. in Texas, 2 in MPECs 2008-E40 & 2008-E41 -- 2008 EK1, C/2008 E1
474Mt. John Obs. in New Zealand, 4 in MPECs 2008-E37, 2008-E39, 2008-E40 & 2008-E41 -- 2008 EQ, 2008 EK1, 2008 EJ1, C/2008 E1
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2008-E37, 2008-E38, 2008-E41 & 2008-E42 -- 2008 EH1, 2008 EE5, C/2008 E1, 2008 BT18
D29Purple Mtn. Obs. XuYi Station in China, 3 in MPEC 2008-E37 -- 2008 DW, 2004 CR2, 175921
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-E41 -- C/2008 E1
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2008-E40 & 2008-E41 -- 2008 EK1, C/2008 E1
204Schiaparelli Obs. in Italy, 1 in MPEC 2008-E41 -- C/2008 E1
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2008-E37 & 2008-E39 -- 2008 EJ1, 3360
691Spacewatch 0.9m telescope in Arizona, 9 in MPEC 2008-E37 -- 2008 BC22, 175189, 141432, 138205, 136618, 9400, 9162, 5836, 3691
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2008-E37 & 2008-E41 -- C/2008 E1, 2008 DX, 2008 DJ5, 2008 DG5, 2008 DD, 2008 CR1, 2008 CL116, 2008 AT28, 2004 FE31
6735Jim Young via Table Mtn. Obs. in southern California, 3 in MPECs 2008-E37 & 2008-E40 -- 2008 EK1, 2008 EE, 2008 DL4
J35Tucci Obs. in Spain, 1 in MPEC 2008-E37 -- 1036
G72University Hills Obs. in southern California, 2 in MPEC 2008-E37 -- 2008 CN1, 2008 CL1
J30Ventilla Obs., 1 in MPEC 2008-E37 -- 4954

Impact Risk Monitoring  on 4 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 EK1JPL Sentry16322026-2105118.2e-09-5.21-5.520JPL: "Analysis based on 20 observations spanning .25970 days (2008-Mar-04.20245 to 2008-Mar-04.46215)." Diameter approximately 0.310 km. from mean, weighted H=20.2.
2008 ESJPL Sentry1556R E M O V E DJPL: Risk listing removed at 1110 UTC.
2008 ERNEODyS15572010-20811064.84e-09-5.12-5.690NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2008/03/02.443 to 2008/03/03.367."
2008 EHNEODyS15572049-208552.29e-06-4.93-4.940NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2008/03/01.287 to 2008/03/03.272."
2008 DJ5JPL Sentry1556R E M O V E DJPL: Risk listing removed at 1030 UTC.
NEODyS1556R E M O V E D
2008 CL116JPL Sentry1556R E M O V E DJPL: Risk listing removed at 1127 UTC.

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 4 March '08

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

2332Grabbed MPEC 2008-E43 - 2007 VK305 - see above
Grabbed MPEC 2008-E44 - 2007 VL305 - see above
2027Grabbed MPEC 2008-E42 - 2008 EE5 - see above
1829Grabbed MPEC 2008-E41 - Comet C/2008 E1 (Catalina) - see above
1632Noted that JPL Sentry has posted 2008 EK1 as an impact risk - see above
1557Grabbed MPEC 2008-E37 - Daily Orbit Update - see above
1556Noted that JPL Sentry has removed 2008 CL116 as an impact risk - see above
Noted that JPL Sentry has removed 2008 DJ5 as an impact risk - see above
Noted that NEODyS has removed 2008 DJ5 as an impact risk - see above
Noted that NEODyS has posted 2008 EH as an impact risk - see above
Noted that NEODyS has posted 2008 ER as an impact risk - see above
Noted that JPL Sentry has removed 2008 ES as an impact risk - see above
Grabbed MPEC 2008-E38 - 2008 EH1 - see above
Grabbed MPEC 2008-E39 - 2008 EJ1 - see above
Grabbed MPEC 2008-E40 - 2008 EK1 - see above
0513Grabbed MPEC 2008-E35 - 2004 PG115 - see above
Grabbed MPEC 2008-E36 - 2006 QP180 - see above