Contents  on 8 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.

Radar Astrometry  on 8 February '10

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 2358 UTC when the database was dated 8 Feb.

NEOCP Activity  on 8 February '10

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

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and one updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of seven listings on the NEOCP at some point today.

New MPECs  on 8 February '10

Minor Planet Electronic Circulars

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

MPEC 2010-C23 - "19:09 UT" - Comet P/2010 B2 (WISE)

<< DOU on 8 Feb. '10 >>  MPEC 2010-C22 - "07:19 UT" - Daily Orbit Update

MPEC 2010-C21 - "00:48 UT" - 2010 CN

MPEC 2010-C20 - "00:45 UT" - 2010 CM

MPEC 2010-C19 - "00:42 UT" - 2010 CL

Observers  on 8 February '10

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

CodeObserver / observatory
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 7 in MPECs 2010-C20, 2010-C21, 2010-C22 & 2010-C23 -- 2010 CN, 2010 CM, 2010 CA, C/2010 B2, 2010 AN61, 2010 AM60, 2009 WF
A81Balzaretto Obs. in Italy, 2 in MPEC 2010-C22 -- 2002 XY38, 230549
B09Capannoli Obs. in Italy, 3 in MPEC 2010-C22 -- 2002 AJ129, 86067, 85839
160Castelmartini Obs. in Italy, 1 in MPEC 2010-C21 -- 2010 CN
C13Como Obs., 1 in MPEC 2010-C22 -- 2007 MK13
448Desert Moon Obs. in New Mexico, 5 in MPEC 2010-C22 -- 2009 BJ58, 2004 XK4, 2004 TR13, 2001 PT9, 9950
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2010-C21 -- 2010 CN
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2009 UN3
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2010-C22 -- 2002 AJ129, 54789, 27346
D95Kurihara Obs. in Japan, 1 in MPEC 2010-C22 -- 1627
J75La Sagra Obs. in Spain, 2 in MPEC 2010-C22 -- 86067, 1862
560Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2010-C22 -- 2010 AO60, 2004 RD84, 2002 XY38
568Mauna Kea in Hawaii, 1 in MPEC 2010-C23 -- C/2010 B2
A99Monte Baldo Obs. in Italy, 1 in MPEC 2010-C21 -- 2010 CN
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2010-C19, 2010-C20 & 2010-C21 -- 2010 CN, 2010 CM, 2010 CL
A53Peschiera del Garda Obs. in Italy, 3 in MPEC 2010-C22 -- 2002 NW16, 86067, 54789
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2010-C23 -- C/2010 B2
926Tenagra II Obs. in Arizona, 1 in MPEC 2010-C21 -- 2010 CN
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2010-C21 -- 2010 CN
C51WISE in Earth polar orbit, 1 in MPEC 2010-C23 -- C/2010 B2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 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 CANEODyS14252019-2040145.19e-05-3.42-3.800NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2010/02/05.197 to 2010/02/07.219."
JPL Sentry14242019-2036135.4e-05-3.40-3.760JPL: "Analysis based on 24 observations spanning 2.0217 days (2010-Feb-05.19638 to 2010-Feb-07.218058)." Diameter approximately 0.042 km. from mean, weighted H=24.6.

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 8 February '10

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

2358Noted Radar Astrometry database update - see above
2006Grabbed MPEC 2010-C23 - Comet P/2010 B2 (WISE) - see above
1425Noted that NEODyS has updated its 2010 CA risk assessment - see above
1424Noted that JPL Sentry has updated its 2010 CA risk assessment - see above
Grabbed MPEC 2010-C22 - Daily Orbit Update - see above
0056Grabbed MPEC 2010-C19 - 2010 CL - see above
Grabbed MPEC 2010-C20 - 2010 CM - see above
Grabbed MPEC 2010-C21 - 2010 CN - see above