Contents  on 2 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 2 April '10

The MPC's NEO Confirmation Page has 13 listings: 8 new, 5 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eight new and five updated listings. Of these, two 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 2 April '10

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 2 Apr. '10 >>  MPEC 2010-G02 - "06:06 UT" - Daily Orbit Update

Observers  on 2 April '10

Five observing facilities appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 5 in MPEC 2010-G02 -- 2010 EX11, 2010 EK44, 2010 DB34, 2010 CC180, 1998 KN3
G58Chabot Obs. in northern California, 1 in MPEC 2010-G02 -- 2010 CH18
J28Jaen Obs. in Spain, 1 in MPEC 2010-G02 -- 2004 XD50
A06Mataro Obs. in Spain, 2 in MPEC 2010-G02 -- 85839, 3554
C51WISE in Earth polar orbit, 2 in MPEC 2010-G02 -- 52750, 163243
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 April '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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
2004 FU162JPL Sentry06012011-21089555.8e-05-5.32-6.010JPL: "Analysis based on 4 observations spanning .03055 days (2004-Mar-31.27744 to 2004-Mar-31.30799)." Diameter approximately 0.006 km. from mean, weighted H=29.0.

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 2 April '10

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

1509Grabbed MPEC 2010-G02 - Daily Orbit Update - see above
0601Noted that JPL Sentry has updated its 2004 FU162 risk assessment - see above