Contents  on 16 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 16 April '08

The MPC's NEO Confirmation Page has 8 listings: 4 new, 4 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and four updated listings. All of these were "one nighters."

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 16 April '08

Minor Planet Electronic Circulars

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

<< DOU on 16 Apr. '08 >>  MPEC 2008-H01 - "06:10 UT" - Daily Orbit Update

Observers  on 16 April '08

Ten observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2008-H01 -- 2008 GR3, 2008 GQ3, 2008 GE, 2008 EE, 2008 CL72
703Catalina Sky Survey (CSS) in Arizona, 3 in MPEC 2008-H01 -- 2004 VW14, 141531, 1866
448Desert Moon Obs. in New Mexico, 2 in MPEC 2008-H01 -- 2008 GU20, 1998 KG3
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2008-H01 -- 2008 FU6, 53319, 11398
704LINEAR in New Mexico, 1 in MPEC 2008-H01 -- 2008 GW20
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2008-H01 -- 2008 ER7
J93Mt. Tuffley Obs. in England, 1 in MPEC 2008-H01 -- 4954
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 11 in MPEC 2008-H01 -- 2008 GW20, 2008 GV3, 2008 FU6, 2008 EC69, 2008 DE, 2004 VW14, 2002 JC, 53319, 35107, 137170, 3752
H06,Bill Dillon in Texas via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-H01 -- 152679
691Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2008-H01 -- 2005 JU108, 68278, 24445, 180186, 162422, 154229, 5626
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 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 GH110NEODyS14132016-2084278.18e-09-5.34-5.790NEODyS: "Based on 17 optical observations (of which 1 are rejected as outliers) from 2008/04/14.464 to 2008/04/15.362."
2008 GD110NEODyS15362053-2083196.77e-06-5.12-5.680NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2008/04/14.288 to 2008/04/15.454."
2008 GA110NEODyS1413208915.67e-11-9.12-9.120NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2008/04/14.194 to 2008/04/15.192."
2008 ER7JPL Sentry14132077-210262.0e-06-3.37-3.720JPL: "Analysis based on 87 observations spanning 37.944 days (2008-Mar-06.33608 to 2008-Apr-13.28028)." Diameter approximately 0.320 km. from mean, weighted H=20.1.
NEODyS14132073-208944.18e-07-3.95-4.020NEODyS: "Based on 87 optical observations (of which 0 are rejected as outliers) from 2008/03/06.337 to 2008/04/13.281."

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 16 April '08

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

1535Noted that NEODyS has posted 2008 GD110 as an impact risk - see above
1413Noted that JPL Sentry has updated its 2008 ER7 risk assessment - see above
Noted that NEODyS has updated its 2008 ER7 risk assessment - see above
Grabbed MPEC 2008-H01 - Daily Orbit Update - see above
1412Noted that NEODyS has posted 2008 GA110 as an impact risk - see above
Noted that NEODyS has posted 2008 GH110 as an impact risk - see above