Contents  on 30 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 30 March '08

The MPC's NEO Confirmation Page has 11 listings: 2 new, 9 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and nine updated listings. Of these, five were "one nighters." So far The Tracking News has counted a total of seventeen 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 30 March '08

Minor Planet Electronic Circulars

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


MPEC 2008-F57 - "21:56 UT" - 2008 ES


MPEC 2008-F56 - "21:03 UT" - 2008 FW5


<< DOU on 30 Mar. '08 >>  MPEC 2008-F55 - "06:07 UT" - Daily Orbit Update

Observers  on 30 March '08

Fifteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2008-F55 -- 2008 EY68
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2008-F55 -- 2008 FP, 2008 EM9
448Desert Moon Obs. in New Mexico, 8 in MPEC 2008-F55 -- 2008 FC, 2008 ES, 2008 ED69, 2008 EB32, 2008 CZ118, 2008 CL72, 2004 FN32, 2002 AJ129
J95Great Shefford Obs. in England, 1 in MPEC 2008-F56 -- 2008 FW5
H51Greiner Research Obs. (GRO) in Wisconsin, 3 in MPEC 2008-F55 -- 2008 FG5, 2002 FW5, 2002 AJ129
701Junk Bond Obs. in Arizona, 2 in MPEC 2008-F55 -- 2008 FO, 2008 FN
704LINEAR in New Mexico, 10 in MPEC 2008-F55 -- 2008 FG5, 2008 EE85, 2008 DE, 2002 JC, 2000 DP107, 138205, 9162, 5646, 4503, 3552
809|EURONEAR via La Silla in Chile, 1 in MPEC 2008-F55 -- 2008 EL6
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-F55 -- 2007 RN7
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2008-F55 & 2008-F56 -- 2008 FW5, 2008 FH5, 2008 FF5, 2008 FE5, 2008 CP116, 2008 CJ119, 2007 NS4, 2005 JU108, 41429, 13553, 5626, 3908
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2008-F57 -- 2008 ES
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2008-F55 -- 2007 RX19, 2005 BE2
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2008-F55 -- 53435, 24445, 144411, 3757
291Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2008-F55 & 2008-F56 -- 2008 FW5, 2008 FK, 2008 FG, 2008 ER7, 2008 EM7, 2008 EC69, 2008 EB9, 2008 EA9, 2005 YP180, 2005 MP13, 2003 HU42, 2002 AJ129
A48Verona Obs. in Italy, 1 in MPEC 2008-F55 -- 2008 FO

Impact Risk Monitoring  on 30 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 FW5JPL Sentry23552096-210832.0e-08-6.46-6.750JPL: "Analysis based on 14 observations spanning 1.8970 days (2008-Mar-28.46774 to 2008-Mar-30.36478)." Diameter approximately 0.150 km. from mean, weighted H=21.7.
2008 FF5JPL Sentry15502029-2080124.6e-07-4.81-5.250JPL: "Analysis based on 29 observations spanning 1.0225 days (2008-Mar-28.32219 to 2008-Mar-29.34473)." Diameter approximately 0.082 km. from mean, weighted H=23.1.
NEODyS14582029-208794.24e-07-4.82-5.260NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2008/03/28.323 to 2008/03/29.345."
2008 FNJPL Sentry19032020-2105472.1e-08-3.77-4.520JPL: "Analysis based on 19 observations spanning 1.7126 days (2008-Mar-27.45915 to 2008-Mar-29.17179)." Diameter approximately 0.784 km. from mean, weighted H=18.2.
NEODyS14582010-2082431.38e-08-3.81-4.600NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2008/03/27.460 to 2008/03/29.173."
2008 FKJPL Sentry1651R E M O V E DJPL: Risk listing removed at 1622 UTC.
NEODyS1456R E M O V E D
2008 EA9JPL Sentry15502061-208152.5e-05-6.34-6.650JPL: "Analysis based on 47 observations spanning 22.854 days (2008-Mar-06.40551 to 2008-Mar-29.25974)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
NEODyS14582061-2090253.75e-05-6.13-6.640NEODyS: "Based on 48 optical observations (of which 1 are rejected as outliers) from 2008/03/06.406 to 2008/03/29.260."
2008 ER7JPL Sentry19032077-210481.4e-06-3.52-4.060JPL: "Analysis based on 65 observations spanning 23.847 days (2008-Mar-06.33608 to 2008-Mar-30.18305)." Diameter approximately 0.320 km. from mean, weighted H=20.1.
NEODyS14582077-208935.01e-07-3.89-4.140NEODyS: "Based on 65 optical observations (of which 0 are rejected as outliers) from 2008/03/06.337 to 2008/03/30.184."

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 30 March '08

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

2355Noted that JPL Sentry has posted 2008 FW5 as an impact risk - see above
2235Grabbed MPEC 2008-F57 - 2008 ES - see above
2132Grabbed MPEC 2008-F56 - 2008 FW5 - see above
1903Noted that JPL Sentry has updated its 2008 ER7 risk assessment - see above
Noted that JPL Sentry has posted 2008 FN as an impact risk - see above
1651Noted that JPL Sentry has removed 2008 FK as an impact risk - see above
1550Noted that JPL Sentry has updated its 2008 EA9 risk assessment - see above
Noted that JPL Sentry has updated its 2008 FF5 risk assessment - see above
1458Noted that NEODyS has updated its 2008 EA9 risk assessment - see above
Noted that NEODyS has updated its 2008 ER7 risk assessment - see above
Noted that NEODyS has updated its 2008 FF5 risk assessment - see above
Noted that NEODyS has updated its 2008 FN risk assessment - see above
1457Grabbed MPEC 2008-F55 - Daily Orbit Update - see above
1456Noted that NEODyS has removed 2008 FK as an impact risk - see above