Contents  on 5 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 5 March '08

The MPC's NEO Confirmation Page has 7 listings: 1 new, 6 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and six updated listings. Of these, six were "one nighters." So far The Tracking News has counted a total of sixteen 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 5 March '08

Minor Planet Electronic Circulars

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


MPEC 2008-E51 - "13:13 UT" - 2008 EZ5


MPEC 2008-E50 - "13:10 UT" - 2008 EY5


MPEC 2008-E49 - "13:06 UT" - 2008 EX5


MPEC 2008-E48 - "13:03 UT" - 2008 EW5


MPEC 2008-E47 - "13:00 UT" - 2008 EV5


<< DOU on 5 Mar. '08 >>  MPEC 2008-E46 - "07:08 UT" - Daily Orbit Update


MPEC 2008-E45 - "00:02 UT" - 2008 ES5

Observers  on 5 March '08

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

CodeObserver / observatory
J94Abbeydale Obs. in England, 1 in MPEC 2008-E46 -- 170891
726Brainerd Obs. in Minnesota, 3 in MPEC 2008-E46 -- 2008 CN1, 2007 TG8, 2002 TD66
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2008-E46 -- 2008 DJ, 2005 RD34
448Desert Moon Obs. in New Mexico, 6 in MPEC 2008-E46 -- 2008 DW, 2008 DC, 2008 DA4, 2008 CZ118, 2008 CJ119, 168318
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-E46 -- 2008 DJ
J95Great Shefford Obs. in England, 5 in MPECs 2008-E45, 2008-E47, 2008-E48, 2008-E49 & 2008-E51 -- 2008 EZ5, 2008 EX5, 2008 EW5, 2008 EV5, 2008 ES5
H51Greiner Research Obs. in Wisconsin, 6 in MPEC 2008-E46 -- 2008 EP, 2008 EL, 2008 CN1, 2008 CL1, 2008 BC22, 2005 EY169
704LINEAR in New Mexico, 9 in MPEC 2008-E46 -- 2008 DK5, 2008 CP116, 2008 CL1, 2005 EY169, 2004 XP164, 170891, 9162, 7977, 1866
130Lumezzane Obs. in Italy, 5 in MPEC 2008-E46 -- 2008 CM, 2008 CL72, 2008 CC6, 2002 TD66, 163693
J40Malaga Obs. in Spain, 1 in MPEC 2008-E46 -- 4954
711McDonald Obs. in Texas, 12 in MPEC 2008-E46 -- 2008 DJ5, 2008 DE, 2008 DA4, 2008 CO116, 2008 CM116, 2008 CJ119, 2008 CE6, 2008 AZ110, 2008 AF4, 2007 VY7, 2006 UA, 2005 FE3
474Mt. John Obs. in New Zealand, 3 in MPECs 2008-E46 & 2008-E51 -- 2008 EZ5, 2008 DK5, 2008 CA5
G96Mt. Lemmon Survey (MLS) in Arizona, 13 in MPECs 2008-E45, 2008-E46, 2008-E47, 2008-E48, 2008-E49, 2008-E50 & 2008-E51 -- 2008 EZ5, 2008 EY5, 2008 EX5, 2008 EW5, 2008 EV5, 2008 ES5, 2008 DX, 2008 DA4, 2008 CJ119, 2007 XJ20, 68278, 163252, 9856
E12Siding Spring Survey in New South Wales, 1 in MPEC 2008-E50 -- 2008 EY5
071Smolyan Obs. in Bulgaria, 4 in MPEC 2008-E46 -- 2007 YZ, 2007 VQ4, 2005 TU45, 2005 EK70
691Spacewatch 0.9m telescope in Arizona, 10 in MPEC 2008-E46 -- 2008 DH5, 2008 BC22, 2008 AL33, 2006 BA148, 2003 QZ30, 175189, 141495, 13553, 9400, 2059
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2008-E46 & 2008-E47 -- 2008 EV5, 2008 ES, 2008 DW22, 2008 DW, 2008 DJ5, 2008 DB, 2008 DA4, 2006 UA
6735Jim Young via Table Mtn. Obs. in southern California, 2 in MPECs 2008-E46 & 2008-E50 -- 2008 EY5, 2008 DY
B18Terskol Obs. in Russia, 1 in MPEC 2008-E46 -- 2002 TD66
A92Urseanu Obs. in Romania, 2 in MPEC 2008-E46 -- 170891, 1685

Impact Risk Monitoring  on 5 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 EE5NEODyS16592011-2090399.57e-09-4.53-5.300NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2008/03/04.173 to 2008/03/04.818."
JPL Sentry03192010-21085293.0e-07-3.10-3.830JPL: "Analysis based on 11 observations spanning .64547 days (2008-Mar-04.17185 to 2008-Mar-04.81732)." Diameter approximately 0.448 km. from mean, weighted H=19.4.
2008 EK1NEODyS15442011-206771.14e-08-4.21-4.220NEODyS: "Based on 25 optical observations (of which 5 are rejected as outliers) from 2008/03/04.203 to 2008/03/04.463."
2008 DW22NEODyS1543R E M O V E D
2008 DA4NEODyS1544208812.81e-11-10.25-10.250NEODyS: "Based on 35 optical observations (of which 0 are rejected as outliers) from 2008/02/27.281 to 2008/03/04.414."
JPL Sentry1543210011.2e-07-6.73-6.730JPL: "Analysis based on 35 observations spanning 6.1328 days (2008-Feb-27.28072 to 2008-Mar-04.4135)." Diameter approximately 0.055 km. from mean, weighted H=24.0.
2008 DBNEODyS15442046-2090313.08e-05-4.92-4.990NEODyS: "Based on 59 optical observations (of which 2 are rejected as outliers) from 2008/02/18.243 to 2008/03/04.430."
JPL Sentry15432046-2108284.8e-05-4.74-4.820JPL: "Analysis based on 58 observations spanning 15.188 days (2008-Feb-18.242 to 2008-Mar-04.42958)." Diameter approximately 0.025 km. from mean, weighted H=25.7.
2008 AF4NEODyS15442078-208922.65e-05-2.24-2.241NEODyS: "Based on 564 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/03/04.281. NOTE: The Virtual Impactor in 2089/01/09.482 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 5 March '08

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

1659Noted that NEODyS has posted 2008 EE5 as an impact risk - see above
1544Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Noted that NEODyS has updated its 2008 DA4 risk assessment - see above
Noted that NEODyS has updated its 2008 DB risk assessment - see above
Grabbed MPEC 2008-E46 - Daily Orbit Update - see above
Grabbed MPEC 2008-E51 - 2008 EZ5 - see above
1543Noted 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 NEODyS has removed 2008 DW22 as an impact risk - see above
Noted that NEODyS has posted 2008 EK1 as an impact risk - see above
Grabbed MPEC 2008-E47 - 2008 EV5 - see above
Grabbed MPEC 2008-E48 - 2008 EW5 - see above
Grabbed MPEC 2008-E49 - 2008 EX5 - see above
Grabbed MPEC 2008-E50 - 2008 EY5 - see above
0319Noted that JPL Sentry has posted 2008 EE5 as an impact risk - see above
0029Grabbed MPEC 2008-E45 - 2008 ES5 - see above