Model of 21 Lutetia from adaptive 
optics observation. Credit: SwRI.

A Southwest Research Institute item from last month reports that "before Rosetta's encounter with Lutetia, an international team of astronomers, using three of the world's largest telescopes, were busy making its own assessment of the asteroid's shape and size, as well as searching for satellites [using adaptive optics, enabling them now] to verify, validate and calibrate our method of combining AO data with light curve studies." See much more info here (new) and compare with flyby images on ESA's 21 Lutetia page. Image credit: SwRI.

Contents  on 26 November '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 26 November '10

The MPC's NEO Confirmation Page has 3 listings: 1 new, 2 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and two updated listings. All of these were "one nighters." So far The Tracking News has counted a total of five 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 26 November '10

Minor Planet Electronic Circulars

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

MPEC 2010-W33 - "19:02 UT" - 2010 WT

MPEC 2010-W32 - "18:54 UT" - 2010 WS

MPEC 2010-W31 - "18:05 UT" - 2007 EJ

<< DOU on 26 Nov. '10 >>  MPEC 2010-W30 - "07:14 UT" - Daily Orbit Update

Observers  on 26 November '10

Twelve observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2010-W30, 2010-W32 & 2010-W33 -- 2010 WT, 2010 WS, 2010 VZ11, 2010 UX6, 2010 SJ, 2010 RJ4, 2010 RC130, 2010 RB130, 2010 PM10, 2002 VE68
B66Casasco Obs. in Italy, 1 in MPEC 2010-W30 -- 3838
448Desert Moon Obs. in New Mexico, 1 in MPEC 2010-W30 -- 2003 YT124
J95Great Shefford Obs. in England, 2 in MPECs 2010-W32 & 2010-W33 -- 2010 WT, 2010 WS
844Los Molinos Obs. in Uruguay, 1 in MPEC 2010-W30 -- 198856
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-W30 -- 2010 UL8
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2010-W30, 2010-W32 & 2010-W33 -- 2010 WT, 2010 WS, 2010 JA35, 2002 GM9, 1999 XR35, 143651, 1580
473Remanzacco Obs. in Italy, 1 in MPEC 2010-W33 -- 2010 WT
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2010-W32 & 2010-W33 -- 2010 WT, 2010 WS
H36Sandlot Obs. in Kansas, 3 in MPECs 2010-W30, 2010-W32 & 2010-W33 -- 2010 WT, 2010 WS, 2010 VY71
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2010-W30 & 2010-W31 -- 2007 EJ, 2000 UP30, 53789
I19Tanti Obs. in Argentina, 1 in MPEC 2010-W33 -- 2010 WT
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 November '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 WSJPL Sentry21402080-210629.2e-09-8.26-8.450JPL: "Analysis based on 24 observations spanning 1.0523 days (2010-Nov-25.23546 to 2010-Nov-26.287733)." Diameter approximately 0.035 km. from mean, weighted H=24.9.

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 26 November '10

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

2140Noted that JPL Sentry has posted 2010 WS as an impact risk - see above
1931Grabbed MPEC 2010-W33 - 2010 WT - see above
1902Grabbed MPEC 2010-W32 - 2010 WS - see above
1814Grabbed MPEC 2010-W31 - 2007 EJ - see above
1646Grabbed MPEC 2010-W30 - Daily Orbit Update - see above