Contents  on 13 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 13 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 13 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-G76 - "15:44 UT" - 2007 AE12

MPEC 2008-G75 - "15:33 UT" - 2008 FU6

<< DOU on 13 Apr. '08 >>  MPEC 2008-G74 - "06:10 UT" - Daily Orbit Update

MPEC 2008-G73 - "03:15 UT" - Comet C/2008 G1 (Gibbs)

Observers  on 13 April '08

A total of 21 observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2008-G74 -- 2005 NB7
B66Casasco Obs., 1 in MPEC 2008-G74 -- 1866
703Catalina Sky Survey (CSS) in Arizona, 7 in MPEC 2008-G74 -- 2008 GS3, 2006 UA, 2006 BG55, 2003 GW, 53789, 27346, 170891
176Consell Obs. in Spain, 2 in MPEC 2008-G74 -- 2008 GB21, 2008 EM9
448Desert Moon Obs. in New Mexico, 7 in MPEC 2008-G74 -- 2008 GV3, 2008 GG2, 2008 FY6, 2008 FU6, 2008 FS6, 2008 EC69, 2008 CP23
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2008-G74 -- 2008 GP3
J95Great Shefford Obs. in England, 6 in MPEC 2008-G74 -- 2008 GY3, 2008 GX3, 2008 GV3, 2008 GO20, 2008 GK2, 2008 GB4
415Kambah Obs. in the Australian Capital Territory, 1 in MPEC 2008-G73 -- C/2008 G1
704LINEAR in New Mexico, 11 in MPECs 2008-G74 & 2008-G75 -- 2008 GW20, 2008 FU6, 2008 EM85, 2002 FW5, 85628, 53789, 152942, 152679, 137158, 102873, 4544
844Los Molinos Obs. in Uruguay, 1 in MPEC 2008-G74 -- 2008 GW20
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-G74 -- 2004 RH340
5683C. Veillet on Mauna Kea in Hawaii, 1 in MPEC 2008-G76 -- 2007 AE12
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-G76 -- 2007 AE12
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2008-G75 -- 2008 FU6
J47Nazaret Obs. in Spain, 1 in MPEC 2008-G73 -- C/2008 G1
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2008-G74 -- 2008 FU6, 2008 ED69, 2008 EC69, 2008 DY, 35107, 137170
645Sloan Digital Sky Survey in New Mexico, 1 in MPEC 2008-G75 -- 2008 FU6
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-G74 -- 11054
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2008-G74 -- 2008 GO20, 2008 GM2, 2008 GE1, 2008 ER7
673Table Mtn. Obs. in southern California, 1 in MPEC 2008-G73 -- C/2008 G1
6735Jim Young via Table Mtn. Obs. in southern California, 5 in MPEC 2008-G74 -- 2008 GZ3, 2008 GX, 2008 GV3, 2008 GL20, 2008 EB32
F85Tiki Obs. in Tahiti, 2 in MPEC 2008-G74 -- 2008 GW20, 2008 GU20
198Wildberg Obs. in Germany, 2 in MPEC 2008-G74 -- 2008 FN6, 2003 GW
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 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 GO20NEODyS1600R E M O V E D-
2008 GM2NEODyS16012063-2085109.29e-07-7.97-8.260NEODyS: "Based on 46 optical observations (of which 0 are rejected as outliers) from 2008/04/06.414 to 2008/04/12.324."
2008 ER7NEODyS16012071-208954.65e-07-3.91-3.990NEODyS: "Based on 85 optical observations (of which 0 are rejected as outliers) from 2008/03/06.337 to 2008/04/12.270."

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 13 April '08

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

1601Noted that NEODyS has updated its 2008 ER7 risk assessment - see above
Noted that NEODyS has updated its 2008 GM2 risk assessment - see above
1600Noted that NEODyS has removed 2008 GO20 as an impact risk - see above
Grabbed MPEC 2008-G74 - Daily Orbit Update - see above
Grabbed MPEC 2008-G75 - 2008 FU6 - see above
Grabbed MPEC 2008-G76 - 2007 AE12 - see above
The NEOCP has become active
0417Grabbed MPEC 2008-G73 - Comet C/2008 G1 (Gibbs) - see above