Contents  on 18 April '08


NOTE: This news page and this Web site will be updating less frequently and at sometimes irregular intervals for the rest of April.

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 18 April '08

The MPC's NEO Confirmation Page has 4 listings: 2 new, 2 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and two 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 18 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 18 Apr. '08 >>  MPEC 2008-H07 - "06:12 UT" - Daily Orbit Update

Observers  on 18 April '08

Fifteen observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 8 in MPEC 2008-H07 -- 2008 GW20, 2008 GV20, 2008 GP20, 2008 GH110, 2008 GC110, 2008 GB21, 2008 GA4, 2008 GA110
703Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2008-H07 -- 2008 GJ110, 2008 EO6, 2008 BT18, 152942, 144901, 142040, 102873, 5587, 1685
F653FTP education program via Faulkes Telescope North in Hawaii, 2 in MPEC 2008-H07 -- 2008 GA4, 2008 EZ97
E10Faulkes Telescope South in New South Wales, 2 in MPEC 2008-H07 -- 2008 GP3, 2008 GD110
6951Marc W. Buie via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2008-H07 -- 2008 CM116
704LINEAR in New Mexico, 8 in MPEC 2008-H07 -- 2008 DE, 35107, 163693, 152942, 143678, 11398, 4954, 3554
J46Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2008-H07 -- 2007 VQ4
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPEC 2008-H07 -- 2008 GV3, 2008 GB4, 2005 JF21, 2004 JN13, 10145, 4503
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2008-H07 -- 1999 TA10
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2008-H07 -- 137170
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2008-H07 -- 2008 FU6, 2008 EC69, 137170
428Reedy Creek Obs. in Queensland, 1 in MPEC 2008-H07 -- 2004 GA1
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-H07 -- 2008 FT6
A97Stammersdorf Obs. in Austria, 1 in MPEC 2008-H07 -- 2005 NB7
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-H07 -- 2008 GD110
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 18 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 GD110JPL Sentry14232060-207831.2e-07-6.92-6.980JPL: "Analysis based on 26 observations spanning 3.9457 days (2008-Apr-14.28705 to 2008-Apr-18.232743)." Diameter approximately 0.042 km. from mean, weighted H=24.5.
NEODyS1423R E M O V E D-
2008 GA110JPL Sentry1423R E M O V E DJPL: Risk listing removed at 0952 UTC.
NEODyS1423R E M O V E D-

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 18 April '08

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

1424Grabbed MPEC 2008-H07 - Daily Orbit Update - see above
1423Noted that JPL Sentry has removed 2008 GA110 as an impact risk - see above
Noted that NEODyS has removed 2008 GA110 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 GD110 risk assessment - see above
Noted that NEODyS has removed 2008 GD110 as an impact risk - see above