Contents  on 27 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 27 March '08

The MPC's NEO Confirmation Page has 7 listings: 7 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had seven updated listings. All of these were "one nighters." So far The Tracking News has counted a total of eight 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 27 March '08

Minor Planet Electronic Circulars

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


MPEC 2008-F39 - "18:44 UT" - 2006 OY10


MPEC 2008-F38 - "16:58 UT" - Comets C/2007 C11, 2007 D4, 2007 D5, 2007 E4, 2007 E5, 2007 F5, 2007 Y10 (SOHO)


MPEC 2008-F37 - "15:08 UT" - 2008 FE


MPEC 2008-F36 - "14:30 UT" - Comet C/2008 E1 (Catalina)


<< DOU on 27 Mar. '08 >>  MPEC 2008-F35 - "06:06 UT" - Daily Orbit Update


MPEC 2008-F34 - "02:22 UT" - 2008 EN82

Observers  on 27 March '08

Nineteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2008-F35 -- 2008 BT18
467Auckland Obs. in New Zealand, 1 in MPEC 2008-F36 -- C/2008 E1
A81Balzaretto Obs. in Italy, 2 in MPEC 2008-F35 -- 2008 BC22, 2003 GW
703Catalina Sky Survey in Arizona, 1 in MPEC 2008-F36 -- C/2008 E1
448Desert Moon Obs. in New Mexico, 6 in MPEC 2008-F35 -- 2008 EQ7, 2008 EM9, 2008 DY, 2008 DK5, 2008 DJ5, 1993 GD
J95Great Shefford Obs. in England, 2 in MPECs 2008-F35 & 2008-F37 -- 2008 FE, 2008 EP7
809|EURONEAR via La Silla in Chile, 4 in MPEC 2008-F35 -- 2008 EM7, 2008 EA9, 2008 DL5, 2008 DA4
130Lumezzane Obs. in Italy, 6 in MPEC 2008-F35 -- 2008 EX84, 2008 EE85, 2006 BG55, 2003 GW, 9162, 5587
J40Malaga Obs. in Spain, 1 in MPEC 2008-F35 -- 1866
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-F39 -- 2006 OY10
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2008-F35 & 2008-F37 -- 2008 FE, 2008 EN82, 2006 FV35, 2005 GP21, 141495, 9162
J93Mt. Tuffley Obs. in England, 1 in MPEC 2008-F35 -- 4954
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2008-F34 -- 2008 EN82
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2008-F34 -- 2008 EN82
C494SECCHI HI1-A instrument (4) aboard STEREO-A in heliocentric orbit leading Earth, 7 in MPEC 2008-F38 -- C/2007 Y10, C/2007 F5, C/2007 E5, C/2007 E4, C/2007 D5, C/2007 D4, C/2007 C11
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2008-F35 -- 2008 EN82, 2005 RD34, 2004 RY109, 86819, 102873
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2008-F35 -- 2008 EX5, 2008 ER7, 2008 EN6, 2008 EB9
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-F35 -- 2008 FB
F85Tiki Obs. in Tahiti, 1 in MPEC 2008-F34 -- 2008 EN82

Impact Risk Monitoring  on 27 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 EA9NEODyS15002059-2090215.0e-05-5.99-6.420NEODyS: "Based on 40 optical observations (of which 1 are rejected as outliers) from 2008/03/06.406 to 2008/03/25.263."
JPL Sentry14592063-208155.1e-05-5.99-6.400JPL: "Analysis based on 39 observations spanning 18.856 days (2008-Mar-06.40551 to 2008-Mar-25.26184)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
2008 ER7NEODyS15002077-208931.35e-06-3.45-3.530NEODyS: "Based on 57 optical observations (of which 0 are rejected as outliers) from 2008/03/06.337 to 2008/03/27.199."
JPL Sentry14592077-2104142.2e-06-3.27-3.540JPL: "Analysis based on 57 observations spanning 20.862 days (2008-Mar-06.33608 to 2008-Mar-27.19809)." Diameter approximately 0.330 km. from mean, weighted H=20.1.
2008 EX5NEODyS15002044-2090572.67e-05-4.20-4.550NEODyS: "Based on 63 optical observations (of which 1 are rejected as outliers) from 2008/03/04.396 to 2008/03/27.214."
JPL Sentry14592044-2083342.7e-05-4.20-4.540JPL: "Analysis based on 62 observations spanning 22.818 days (2008-Mar-04.39523 to 2008-Mar-27.21361)." Diameter approximately 0.057 km. from mean, weighted H=23.9.
2008 DA4JPL Sentry14592091-210026.0e-07-5.98-6.070JPL: "Analysis based on 78 observations spanning 15.168 days (2008-Feb-27.28072 to 2008-Mar-13.44826)." Diameter approximately 0.056 km. from mean, weighted H=23.9.

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 27 March '08

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

1857Grabbed MPEC 2008-F38 - Comets C/2007 C11, 2007 D4, 2007 D5, 2007 E4, 2007 E5, 2007 F5, 2007 Y10 (SOHO) - see above
Grabbed MPEC 2008-F39 - 2006 OY10 - see above
1528Grabbed MPEC 2008-F37 - 2008 FE - see above
1500Noted 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 EX5 risk assessment - see above
1459Noted that JPL Sentry has updated its 2008 DA4 risk assessment - see above
Noted that JPL Sentry has updated its 2008 EA9 risk assessment - see above
Noted that JPL Sentry has updated its 2008 ER7 risk assessment - see above
Noted that JPL Sentry has updated its 2008 EX5 risk assessment - see above
Grabbed MPEC 2008-F35 - Daily Orbit Update - see above
Grabbed MPEC 2008-F36 - Comet C/2008 E1 (Catalina) - see above
0425Grabbed MPEC 2008-F34 - 2008 EN82 - see above