Contents  on 4 April '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 April '08

The MPC's NEO Confirmation Page has 9 listings: 3 new, 6 updated

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

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been five MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-G24 - "22:57 UT" - 2008 GX


MPEC 2008-G23 - "22:10 UT" - 2008 GV


MPEC 2008-G22 - "15:45 UT" - 2008 GR


MPEC 2008-G21 - "15:41 UT" - 2008 GQ


<< DOU on 4 Apr. '08 >>  MPEC 2008-G20 - "06:08 UT" - Daily Orbit Update

Observers  on 4 April '08

Nineteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2008-G20 -- 2008 AF4
235CAST Obs. in Italy, 1 in MPEC 2008-G24 -- 2008 GX
703Catalina Sky Survey (CSS) in Arizona, 15 in MPEC 2008-G20 -- 2008 FW6, 2008 EE85, 2006 UA, 2003 FY6, 86667, 54686, 27346, 24445, 154988, 144861, 141531, 137158, 6456, 6037, 1866
176Consell Obs. in Spain, 1 in MPEC 2008-G24 -- 2008 GX
448Desert Moon Obs. in New Mexico, 6 in MPEC 2008-G20 -- 2008 FY6, 2008 FU6, 2008 FG5, 2008 DY, 2001 HY7, 1998 KG3
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-G23 -- 2008 GV
J95Great Shefford Obs. in England, 3 in MPECs 2008-G20 & 2008-G21 -- 2008 GQ, 2008 FX6, 2008 ER7
704LINEAR in New Mexico, 9 in MPECs 2008-G20, 2008-G23 & 2008-G24 -- 2008 GX, 2008 GV, 2008 EO6, 2006 UA, 85236, 141432, 138127, 3552, 1864
560Madonna di Dossobuono Obs. in Italy, 2 in MPEC 2008-G20 -- 2008 FO, 2008 ES
711McDonald Obs. in Texas, 1 in MPEC 2008-G24 -- 2008 GX
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2008-G20, 2008-G21, 2008-G22 & 2008-G24 -- 2008 GX, 2008 GR, 2008 GQ, 2004 FN32, 2000 DP107, 102873, 5646
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2008-G21 -- 2008 GQ
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2008-G20 -- 170891
B61Sant Cugat del Valles Obs. in Spain, 1 in MPEC 2008-G20 -- 1864
204Schiaparelli Obs. in Italy, 3 in MPEC 2008-G20 -- 2008 FO, 2008 EM85, 2008 EA32
H85Silver Spring Obs. in Maryland, 1 in MPEC 2008-G20 -- 2008 GD
691Spacewatch 0.9m telescope in Arizona, 9 in MPEC 2008-G20 -- 2008 DJ5, 2004 RY109, 2004 CR2, 2003 HA22, 68278, 162422, 154229, 11054, 5626
291Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2008-G20 & 2008-G21 -- 2008 GQ, 2008 GK, 2008 GJ, 2008 FT6, 2008 FN, 2008 FL7, 2008 FK7, 2008 FG5, 2008 FF5, 2008 ER7, 2008 EE5, 2003 ED50
F85Tiki Obs. in Tahiti, 6 in MPEC 2008-G20 -- 2008 FY6, 2008 FG5, 2008 EJ1, 2008 DD, 2008 CC119, 2001 DQ8
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 April '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 GJNEODyS14292033-207373.53e-08-4.97-5.520NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2008/04/01.299 to 2008/04/03.228."
2008 FK7NEODyS1427R E M O V E D
2008 FT6NEODyS1427R E M O V E D
2008 FF5NEODyS14282060-207022.45e-07-5.11-5.230NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2008/03/28.323 to 2008/04/04.216."
2008 FNNEODyS1427R E M O V E D
2008 ER7NEODyS14282071-208943.49e-07-4.04-4.070NEODyS: "Based on 79 optical observations (of which 0 are rejected as outliers) from 2008/03/06.337 to 2008/04/04.173."
2008 AF4NEODyS1428208927.7e-06-2.77-2.770NEODyS: "Based on 598 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/04/03.104."

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 April '08

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

2324Grabbed MPEC 2008-G23 - 2008 GV - see above
Grabbed MPEC 2008-G24 - 2008 GX - see above
1559Grabbed MPEC 2008-G21 - 2008 GQ - see above
Grabbed MPEC 2008-G22 - 2008 GR - see above
1429Noted that NEODyS has updated its 2008 GJ risk assessment - see above
Grabbed MPEC 2008-G20 - Daily Orbit Update - see above
1428Noted that NEODyS has updated its 2008 AF4 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
1427Noted that NEODyS has removed 2008 FK7 as an impact risk - see above
Noted that NEODyS has removed 2008 FN as an impact risk - see above
Noted that NEODyS has removed 2008 FT6 as an impact risk - see above