Contents  on 5 April '10


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 '10

The MPC's NEO Confirmation Page has 9 listings: 2 new, 7 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and seven updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of fourteen listings on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 5 April '10

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-G26 - "16:28 UT" - 2010 GD6

MPEC 2010-G25 - "16:26 UT" - 2010 GC6

MPEC 2010-G24 - "16:24 UT" - 2010 GB6

MPEC 2010-G23 - "16:22 UT" - 2010 GA6

MPEC 2010-G22 - "15:42 UT" - 2010 GZ5

MPEC 2010-G21 - "13:17 UT" - 2008 EY68

<< DOU on 5 Apr. '10 >>  MPEC 2010-G20 - "06:08 UT" - Daily Orbit Update

Observers  on 5 April '10

A total of 20 observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 6 in MPECs 2010-G20 & 2010-G22 -- 2010 GZ5, 2010 FC, 2010 DJ56, 2010 CH55, 2010 CC55, 2005 YU55
703Catalina Sky Survey (CSS) in Arizona, 14 in MPECs 2010-G20, 2010-G23, 2010-G24, 2010-G25 & 2010-G26 -- 2010 GD6, 2010 GC6, 2010 GB6, 2010 GA6, 2010 FP, 2005 YU55, 2004 RK, 1999 HW1, 68216, 40263, 39796, 220124, 164201, 1917
448Desert Moon Obs. in New Mexico, 5 in MPEC 2010-G20 -- 2010 FL, 2010 EZ45, 2010 CV180, 2001 HC, 1999 TA10
651Grasslands Obs. in Arizona, 4 in MPECs 2010-G23, 2010-G24, 2010-G25 & 2010-G26 -- 2010 GD6, 2010 GC6, 2010 GB6, 2010 GA6
J95Great Shefford Obs. in England, 2 in MPEC 2010-G20 -- 2010 FP, 2010 FA81
704LINEAR in New Mexico, 5 in MPEC 2010-G20 -- 2010 FR, 40267, 27346, 152558, 7822
H13Lenomiya Obs. in Arizona, 2 in MPEC 2010-G20 -- 2010 FQ, 2005 YU55
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-G20 -- 2009 WM1
213Montcabre Obs. in Spain, 1 in MPEC 2010-G20 -- 2010 FP
J93Mt. Tuffley Obs. in England, 5 in MPEC 2010-G20 -- 85839, 68216, 54789, 1036, 433
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2010-G20 -- 2010 DB34, 2006 CX10, 2005 YU55, 68359, 220124, 152931
941Pla D'Arguines Obs. in Spain, 2 in MPEC 2010-G20 -- 2010 FF7, 2004 FG11
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2010-G20 -- 2010 CM44
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2010-G20 -- 2005 YU55
H11Rodeo Obs. in New Mexico, 1 in MPEC 2010-G20 -- 2005 YU55
H36Sandlot Obs. in Kansas, 1 in MPEC 2010-G22 -- 2010 GZ5
204Schiaparelli Obs. in Italy, 4 in MPEC 2010-G20 -- 2010 FP, 2010 CN44, 68359, 220124
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2010-G20 & 2010-G22 -- 2010 GZ5, 2005 SC71
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2010-G20 & 2010-G22 -- 2010 GZ5, 2010 EX11, 2010 CL1
926Tenagra II Obs. in Arizona, 9 in MPECs 2010-G20, 2010-G21, 2010-G22, 2010-G23, 2010-G24, 2010-G25 & 2010-G26 -- 2010 GZ5, 2010 GD6, 2010 GC6, 2010 GB6, 2010 GA6, 2010 FO, 2010 FD7, 2010 FA81, 2008 EY68
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 April '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
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
2010 GD6JPL Sentry23262049-21091182.2e-07-6.11-7.770JPL: "Analysis based on 18 observations spanning .07079 days (2010-Apr-05.25856 to 2010-Apr-05.32935)." Diameter approximately 0.063 km. from mean, weighted H=23.7.
2010 GA6JPL Sentry21152021-2102423.8e-06-5.64-6.040JPL: "Analysis based on 13 observations spanning .14007 days (2010-Apr-05.16553 to 2010-Apr-05.3056)." Diameter approximately 0.022 km. from mean, weighted H=26.0.
2009 WM1JPL Sentry1424209118.9e-08-5.00-5.000JPL: "Analysis based on 86 observations spanning 135.79 days (2009-Nov-17.4641 to 2010-Apr-02.250112)." Diameter approximately 0.280 km. from mean, weighted H=20.4.
NEODyS1424R 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 5 April '10

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

2326Noted that JPL Sentry has posted 2010 GD6 as an impact risk - see above
2115Noted that JPL Sentry has posted 2010 GA6 as an impact risk - see above
1703Grabbed MPEC 2010-G25 - 2010 GC6 - see above
Grabbed MPEC 2010-G26 - 2010 GD6 - see above
1702Grabbed MPEC 2010-G23 - 2010 GA6 - see above
Grabbed MPEC 2010-G24 - 2010 GB6 - see above
1601Grabbed MPEC 2010-G22 - 2010 GZ5 - see above
1424Noted that JPL Sentry has updated its 2009 WM1 risk assessment - see above
Noted that NEODyS has removed 2009 WM1 as an impact risk - see above
Grabbed MPEC 2010-G20 - Daily Orbit Update - see above
Grabbed MPEC 2010-G21 - 2008 EY68 - see above