Contents  on 5 April '08


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 April '08

The MPC's NEO Confirmation Page has 12 listings: 3 new, 9 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and nine updated listings. Of these, eight 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 April '08

Minor Planet Electronic Circulars

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

MPEC 2008-G29 - "20:15 UT" - 2005 GY8 = 2008 FG5

MPEC 2008-G28 - "11:59 UT" - 2008 GF1

MPEC 2008-G27 - "11:32 UT" - 2008 GE1

MPEC 2008-G26 - "11:29 UT" - 2008 GD1

<< DOU on 5 Apr. '08 >>  MPEC 2008-G25 - "06:08 UT" - Daily Orbit Update

Observers  on 5 April '08

Thirteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 19 in MPEC 2008-G25 -- 2008 GF, 2008 GE, 2008 GD, 2008 FW6, 2008 FO, 2008 FL7, 2008 FJ7, 2008 FG5, 2008 FF5, 2008 FB, 2008 EQ7, 2008 EH, 2008 EE, 2008 DY, 2008 CZ21, 2008 CS116, 2008 CO116, 2008 CH, 2002 TW55
703Catalina Sky Survey (CSS) in Arizona, 3 in MPEC 2008-G25 -- 2008 BC22, 86667, 179806
176Consell Obs. in Spain, 3 in MPEC 2008-G25 -- 2008 GV, 2008 GK, 2008 FN
734Farpoint Obs. in Kansas, 3 in MPECs 2008-G25, 2008-G27 & 2008-G28 -- 2008 GF1, 2008 GE1, 2008 AF4
J95Great Shefford Obs. in England, 1 in MPEC 2008-G25 -- 2008 GV
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2008-G25 -- 2007 VQ4, 2003 GW
704LINEAR in New Mexico, 4 in MPEC 2008-G25 -- 2008 EO6, 35107, 137170, 7889
711McDonald Obs. in Texas, 5 in MPEC 2008-G25 -- 2008 FU6, 2008 FN, 2008 ED69, 2007 VY7, 2000 DP107
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2008-G25, 2008-G26, 2008-G27 & 2008-G28 -- 2008 GF1, 2008 GE1, 2008 GD1, 68063, 34613
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2008-G25 -- 11054, 3552
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2008-G25, 2008-G26 & 2008-G27 -- 2008 GJ, 2008 GH, 2008 GE1, 2008 GD1, 2008 FN, 2008 FK7, 2008 FG5, 2008 ER7, 2008 EM7, 2008 EB9
147Suno Obs. in Italy, 2 in MPEC 2008-G25 -- 2008 GX, 2008 FN
6735Jim Young via Table Mtn. Obs. in southern California, 2 in MPEC 2008-G25 -- 2008 FS6, 2008 EZ97
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 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.





Notes for Today's Latest Risk Assessments
2008 GJNEODyS15422059-207329.29e-09-5.68-5.830NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2008/04/01.299 to 2008/04/04.280."
2008 GHNEODyS15422074-207521.62e-10-8.96-9.250NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2008/04/01.298 to 2008/04/04.238."
2008 FF5NEODyS15422060-207033.46e-07-4.99-5.330NEODyS: "Based on 47 optical observations (of which 0 are rejected as outliers) from 2008/03/28.323 to 2008/04/04.216."
2008 ER7NEODyS15422077-208943.85e-07-4.00-4.060NEODyS: "Based on 82 optical observations (of which 0 are rejected as outliers) from 2008/03/06.337 to 2008/04/05.229."
2008 AF4NEODyS1542208935.43e-06-2.93-2.930NEODyS: "Based on 600 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/04/05.228."

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 April '08

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

2158Grabbed MPEC 2008-G29 - 2005 GY8 = 2008 FG5 - see above
1542Noted 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
Noted that NEODyS has updated its 2008 GH risk assessment - see above
Noted that NEODyS has updated its 2008 GJ risk assessment - see above
Grabbed MPEC 2008-G25 - Daily Orbit Update - see above
1541Grabbed MPEC 2008-G26 - 2008 GD1 - see above
Grabbed MPEC 2008-G27 - 2008 GE1 - see above
Grabbed MPEC 2008-G28 - 2008 GF1 - see above