Contents  on 10 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 10 April '08

The MPC's NEO Confirmation Page has 4 listings: 1 new, 3 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and three updated listings. All of these were "one nighters." So far The Tracking News has counted a total of six objects listed on the NEOCP at some point today.

New MPECs  on 10 April '08

Minor Planet Electronic Circulars

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

MPEC 2008-G64 - "20:00 UT" - 2008 AB31

MPEC 2008-G63 - "16:50 UT" - 2008 FN6

MPEC 2008-G62 - "13:26 UT" - 2008 GL20

<< DOU on 10 Apr. '08 >>  MPEC 2008-G61 - "06:09 UT" - Daily Orbit Update

Observers  on 10 April '08

Fourteen observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2008-G62 -- 2008 GL20
A44Altschwendt Obs. in Austria, 1 in MPEC 2008-G63 -- 2008 FN6
H55Astronomical Research Obs. (ARO) in Illinois, 12 in MPEC 2008-G61 -- 2008 GX, 2008 GF, 2008 GD, 2008 FW6, 2008 FW5, 2008 FL7, 2008 FH, 2008 FE5, 2008 EX5, 2008 EV5, 2008 DX, 2008 CN1
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2008-G61 & 2008-G63 -- 2008 FN6, 35107, 162173, 3288
J95Great Shefford Obs. in England, 6 in MPECs 2008-G61 & 2008-G62 -- 2008 GX3, 2008 GS3, 2008 GQ3, 2008 GP3, 2008 GL20, 2008 GB4
704LINEAR in New Mexico, 3 in MPECs 2008-G61 & 2008-G62 -- 2008 GP3, 2008 GL20, 85628
474Mt. John Obs. in New Zealand, 12 in MPEC 2008-G61 -- 2008 GV3, 2008 GS3, 2008 GQ, 2008 GP3, 2008 GL2, 2008 FE5, 2008 EG, 2008 DG17, 2008 AB31, 2006 KV86, 2005 LW19, 2005 BC
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPEC 2008-G61 -- 2008 GS3, 2008 GR3, 2008 EV5, 162825, 162063, 13553
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2008-G64 -- 2008 AB31
473Remanzacco Obs. in Italy, 1 in MPEC 2008-G61 -- 2008 GS3
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-G62 -- 2008 GL20
204Schiaparelli Obs. in Italy, 1 in MPEC 2008-G61 -- 2006 BG55
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2008-G61 -- 2008 FL7, 2003 HA22, 162039, 154229, 152679
198Wildberg Obs. in Germany, 1 in MPEC 2008-G63 -- 2008 FN6
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 April '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.





Notes for Today's Latest Risk Assessments
2008 GR3JPL Sentry1408R E M O V E DJPL: Risk listing removed at 1041 UTC.
2008 GCJPL Sentry2354R E M O V E D
2008 EX5NEODyS14092056-2090216.24e-05-3.82-4.090NEODyS: "Based on 66 optical observations (of which 1 are rejected as outliers) from 2008/03/04.396 to 2008/04/06.134."
JPL Sentry14082062-207266.0e-06-4.80-5.230JPL: "Analysis based on 65 observations spanning 32.738 days (2008-Mar-04.39523 to 2008-Apr-06.132868)." Diameter approximately 0.059 km. from mean, weighted H=23.8.

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 10 April '08

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

2354Noted that JPL Sentry has removed 2008 GC as an impact risk - see above
2005Grabbed MPEC 2008-G64 - 2008 AB31 - see above
1751Grabbed MPEC 2008-G63 - 2008 FN6 - see above
1409Noted that NEODyS has updated its 2008 EX5 risk assessment - see above
Grabbed MPEC 2008-G61 - Daily Orbit Update - see above
1408Noted that JPL Sentry has updated its 2008 EX5 risk assessment - see above
Noted that JPL Sentry has removed 2008 GR3 as an impact risk - see above
Grabbed MPEC 2008-G62 - 2008 GL20 - see above