Pan-STARRs PS1 observatory at dawn atop 
Haleakala in Hawaii. Credit: Rob Ratkowski/IfA.

The Honolulu Star-Advertiser ran an AP report yesterday that the Pan-STARRS telescope group planned for Mauna Kea has been delayed "by about two years" due to mechanical problems with the prototype on Haleakala. (That instrument is seen here in a photo by Rob Ratkowski, with Mauna Kea in the distance before sunrise, courtesy of the University of Hawaii Institute for Astronomy.) This report and a Government Video article seem to indicate there are problems with funding, too.

Contents  on 10 December '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 10 December '10

The MPC's NEO Confirmation Page has 15 listings: 2 new, 13 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and thirteen updated listings. Of these, eight were "one nighters." So far The Tracking News has counted a total of 23 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 10 December '10

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts. No Daily Orbit Update DOU MPEC has been posted yet, so visit the MPC Status Page for possible explanation and check the MPC Mirror Page for alternate access to key pages, maybe including new MPECs.

MPEC 2010-X87 - "20:08 UT" - 2010 XR45

MPEC 2010-X86 - "05:31 UT" - 2010 XN25

Observers  on 10 December '10

Eleven observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2010-X86 & 2010-X87 -- 2010 XR45, 2010 XN25
300Bisei Spaceguard Center in Japan, 1 in MPEC 2010-X87 -- 2010 XR45
235CAST Obs. in Italy, 1 in MPEC 2010-X87 -- 2010 XR45
703Catalina Sky Survey in Arizona, 1 in MPEC 2010-X87 -- 2010 XR45
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2010-X87 -- 2010 XR45
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2010-X86 & 2010-X87 -- 2010 XR45, 2010 XN25
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2010-X86 -- 2010 XN25
473Remanzacco Obs. in Italy, 1 in MPEC 2010-X87 -- 2010 XR45
204Schiaparelli Obs. in Italy, 1 in MPEC 2010-X87 -- 2010 XR45
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2010-X87 -- 2010 XR45
6734Mike Hicks via Table Mtn. Obs. in southern California, 1 in MPEC 2010-X87 -- 2010 XR45
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 December '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
2008 EW84JPL Sentry2359210914.9e-10-8.90-8.900JPL: "Analysis based on 16 observations spanning 2.0115 days (2008-Mar-12.23466 to 2008-Mar-14.24612)." Diameter approximately 0.053 km. from mean, weighted H=24.0.

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 10 December '10

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

2359Noted that JPL Sentry has posted 2008 EW84 as an impact risk - see above
2100Grabbed MPEC 2010-X87 - 2010 XR45 - see above
0601Grabbed MPEC 2010-X86 - 2010 XN25 - see above