Contents  on 23 February '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 23 February '10

The MPC's NEO Confirmation Page has 7 listings: 1 new, 6 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and six updated listings. So far The Tracking News has counted a total of twelve 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 23 February '10

Minor Planet Electronic Circulars

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

MPEC 2010-D75 - "23:22 UT" - 2010 DB34

MPEC 2010-D74 - "19:46 UT" - 2010 CN141

<< DOU on 23 Feb. '10 >>  MPEC 2010-D73 - "07:21 UT" - Daily Orbit Update

Observers  on 23 February '10

Fourteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2010-D73 -- 2010 CB19
143Gnosca Obs. in Switzerland, 1 in MPEC 2010-D73 -- 2002 AJ129
J95Great Shefford Obs. in England, 2 in MPEC 2010-D73 -- 2010 DU1, 2010 DE2
D95Kurihara Obs. in Japan, 1 in MPEC 2010-D73 -- 433
704LINEAR in New Mexico, 20 in MPEC 2010-D73 -- 2010 BB3, 2009 UV18, 2008 EE, 2007 UR3, 2006 YY2, 2006 EE1, 2002 XY38, 2002 NW16, 68216, 66251, 221980, 172722, 162998, 152558, 138013, 5693, 4486, 4055, 3671, 1627
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2010-D73 -- 2008 EV5
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-D74 -- 2010 CN141
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2010-D73 -- 2010 DN, 2010 CQ105
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-D73 -- 2010 CB55
D21Shenton Park Obs. in Western Australia, 5 in MPEC 2010-D73 -- 2010 DZ1, 2010 DE2, 2010 CM44, 2010 CL18, 2009 FY4
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2010-D73 & 2010-D75 -- 2010 DB34, 2010 DA
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2010-D73 -- 2008 EV5
926Tenagra II Obs. in Arizona, 2 in MPEC 2010-D73 -- 2010 CK19, 2010 CJ19
C51WISE in Earth polar orbit, 13 in MPECs 2010-D73 & 2010-D74 -- 2010 CN141, 2009 UX17, 89959, 88263, 86326, 85709, 162566, 162181, 161989, 159686, 4015, 2212, 1685
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 February '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. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few 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 CK19JPL Sentry16002089-210751.3e-06-7.68-8.110JPL: "Analysis based on 33 observations spanning 2.1365 days (2010-Feb-14.33293 to 2010-Feb-16.46946)." Diameter approximately 0.009 km. from mean, weighted H=27.9.

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 23 February '10

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

2358Grabbed MPEC 2010-D75 - 2010 DB34 - see above
2017Grabbed MPEC 2010-D74 - 2010 CN141 - see above
1600Noted that JPL Sentry has updated its 2010 CK19 risk assessment - see above
Grabbed MPEC 2010-D73 - Daily Orbit Update - see above