Contents  on 21 January '10

Resources:

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 21 January '10

The MPC's NEO Confirmation Page has 7 listings: 3 new, 4 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and four updated listings. Of these, three were "one nighters." The Tracking News counted a total of eight listings on the NEOCP at some point on this day.

New MPECs  on 21 January '10

Minor Planet Electronic Circulars

There were four MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2010-B29 - "23:59 UT" - 2010 BU2


MPEC 2010-B28 - "23:05 UT" - Comets C/2009 Y3, 2009 Y4 (STEREO)


MPEC 2010-B27 - "22:49 UT" - Comets C/2009 V1, 2009 V2 (SOHO)


<< DOU on 21 Jan. '10 >>  MPEC 2010-B26 - "07:13 UT" - Daily Orbit Update

Observers  on 21 January '10

Eleven observing facilities appeared in this day's MPECs.

CodeObserver / observatory
160Castelmartini Obs. in Italy, 2 in MPEC 2010-B26 -- 2010 AE, 99248
157Frasso Sabino Obs. in Italy, 1 in MPEC 2010-B26 -- 2010 BC
704LINEAR in New Mexico, 1 in MPEC 2010-B29 -- 2010 BU2
J75La Sagra Obs. in Spain, 2 in MPEC 2010-B26 -- 2009 XC2, 85839
B33Libbiano Obs. in Italy, 1 in MPEC 2010-B29 -- 2010 BU2
I20Rio Cuarto Obs. in Argentina, 5 in MPEC 2010-B26 -- 2010 BQ, 2010 BL2, 2010 BK2, 2003 UL12, 2003 CH11
C494HI1-A instrument (4) aboard STEREO-A in heliocentric orbit leading Earth, 2 in MPEC 2010-B28 -- C/2009 Y4, C/2009 Y3
C495COR2-A instrument (5) aboard STEREO-A in heliocentric orbit leading Earth, 1 in MPEC 2010-B28 -- C/2009 Y4
C504HI1-B instrument (4) aboard STEREO-B in heliocentric orbit trailing Earth, 4 in MPECs 2010-B27 & 2010-B28 -- C/2009 Y4, C/2009 Y3, C/2009 V2, C/2009 V1
C505COR2-B instrument (5) aboard STEREO-B in heliocentric orbit trailing Earth, 1 in MPEC 2010-B28 -- C/2009 Y4
204Schiaparelli Obs. in Italy, 2 in MPEC 2010-B26 -- 2010 BQ, 2010 BH2
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 2 in MPEC 2010-B28 -- C/2009 Y4, C/2009 Y3
2493LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 2 in MPEC 2010-B27 -- C/2009 V2, C/2009 V1
C00Velikie Luki Obs. in Russia, 1 in MPEC 2010-B26 -- 24761
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 January '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. 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.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2010 BL2JPL Sentry15052014-2096215.9e-09-3.43-3.920JPL: "Analysis based on 20 observations spanning 1.5982 days (2010-Jan-19.47761 to 2010-Jan-21.07577)." Diameter approximately 1.200 km. from mean, weighted H=17.2.
NEODyS15052014-2084449.51e-09-3.22-3.590NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2010/01/19.478 to 2010/01/21.077."
2005 UONEODyS1505R E M O V E D-

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 21 January '10

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

0028 1/22Grabbed MPEC 2010-B29 - 2010 BU2 - see above
2359Grabbed MPEC 2010-B28 - Comets C/2009 Y3, 2009 Y4 (STEREO) - see above
2304Grabbed MPEC 2010-B27 - Comets C/2009 V1, 2009 V2 (SOHO) - see above
1505Noted that NEODyS has removed 2005 UO as an impact risk - see above
Noted that JPL Sentry has updated its 2010 BL2 risk assessment - see above
Noted that NEODyS has posted 2010 BL2 as an impact risk - see above
Grabbed MPEC 2010-B26 - Daily Orbit Update - see above