Contents  on 4 February '09

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 4 February '09

The MPC's NEO Confirmation Page has 6 listings: 6 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of 29 objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs  on 4 February '09

Minor Planet Electronic Circulars

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


MPEC 2009-C47 - "22:50 UT" - Comets C/2008 V5, 2008 V6, 2008 W2, 2008 W3 (SOHO)


MPEC 2009-C46 - "22:42 UT" - Comets C/2008 V1, 2008 V2, 2008 V3, 2008 V4 (SOHO)


MPEC 2009-C45 - "22:25 UT" - 2009 CR2


MPEC 2009-C44 - "17:21 UT" - 2009 CD2


MPEC 2009-C43 - "17:17 UT" - 2009 CC2


MPEC 2009-C42 - "17:12 UT" - 2009 CB2


MPEC 2009-C41 - "17:09 UT" - 2009 CA2


MPEC 2009-C40 - "17:07 UT" - 2009 CZ1


MPEC 2009-C39 - "17:03 UT" - 2009 CY1


MPEC 2009-C38 - "17:01 UT" - 2009 CX1


MPEC 2009-C37 - "16:57 UT" - 2009 CW1


MPEC 2009-C36 - "16:54 UT" - 2009 CV1


MPEC 2009-C35 - "16:52 UT" - 2009 CU1


MPEC 2009-C34 - "16:48 UT" - 2009 CT1


MPEC 2009-C33 - "16:44 UT" - 2009 CS1


MPEC 2009-C32 - "16:38 UT" - 2009 CR1


MPEC 2009-C31 - "16:35 UT" - 2009 CQ1


<< DOU on 4 Feb. '09 >>  MPEC 2009-C30 - "07:06 UT" - Daily Orbit Update


MPEC 2009-C29 - "05:09 UT" - 2007 BG29

Observers  on 4 February '09

A total of 23 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 10 in MPECs 2009-C30 & 2009-C43 -- 2009 CC2, 2009 BL58, 2009 BK71, 2009 BH2, 2009 BE77, 2009 BD81, 2009 BA11, 2009 AF16, 2008 YX32, 2008 WH60
A74Bergen-Enkheim Obs. in Germany, 3 in MPECs 2009-C30 & 2009-C45 -- 2009 CV, 2009 CR2, 2008 YK2
493Calar Alto Obs. in Spain, 1 in MPEC 2009-C30 -- 2008 JG
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2009-C30, 2009-C31, 2009-C41, 2009-C43 & 2009-C45 -- 2009 CR2, 2009 CQ1, 2009 CC2, 2009 CA2, 2007 MK13, 2006 SX217, 2002 XP90, 2002 AC5, 2000 KN44, 2000 FL1
448Desert Moon Obs. in New Mexico, 5 in MPEC 2009-C30 -- 2009 BP58, 2009 AM, 2008 YZ32, 2007 DK8, 141052
808El Leoncito Obs. in Argentina, 9 in MPEC 2009-C30 -- 2005 BC, 2003 QM47, 18882, 16834, 14402, 4957, 4596, 1917, 1036
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2009-C30 -- 2008 QT3, 2006 AS2, 2000 BL19
704LINEAR in New Mexico, 13 in MPECs 2009-C30, 2009-C31, 2009-C33 & 2009-C37 -- 2009 CW1, 2009 CS1, 2009 CQ1, 2009 AH16, 2008 QS11, 2008 EE, 2007 BT2, 2003 XB22, 2000 FL1, 85938, 36284, 162900, 162385
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2009-C32, 2009-C35, 2009-C36 & 2009-C40 -- 2009 CZ1, 2009 CV1, 2009 CU1, 2009 CR1
B67Mirasteilas Obs. in Switzerland, 7 in MPEC 2009-C30 -- 2006 BC10, 22771, 142348, 141765, 111253, 7358, 4179
G96Mt. Lemmon Survey (MLS) in Arizona, 26 in MPECs 2009-C30, 2009-C31, 2009-C32, 2009-C33, 2009-C34, 2009-C35, 2009-C36, 2009-C37, 2009-C38, 2009-C39, 2009-C40, 2009-C41, 2009-C42, 2009-C43 & 2009-C44 -- 2009 CZ1, 2009 CY1, 2009 CX1, 2009 CW1, 2009 CV1, 2009 CU1, 2009 CT1, 2009 CS1, 2009 CR1, 2009 CQ1, 2009 CD2, 2009 CC2, 2009 CB2, 2009 CA2, 2009 BT5, 2009 BQ5, 2009 BN2, 2008 XP, 2003 XB22, 2002 PG80, 2001 PD1, 1999 AJ39, 168378, 137925, 12923, 5863
A13Naef Obs. in Switzerland, 1 in MPEC 2009-C45 -- 2009 CR2
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-C45 -- 2009 CR2
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2009-C31, 2009-C33 & 2009-C43 -- 2009 CS1, 2009 CQ1, 2009 CC2
H36Sandlot Obs. in Kansas, 4 in MPECs 2009-C32, 2009-C33, 2009-C35 & 2009-C42 -- 2009 CU1, 2009 CS1, 2009 CR1, 2009 CB2
H85Silver Spring Obs. in Maryland, 1 in MPEC 2009-C31 -- 2009 CQ1
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 8 in MPECs 2009-C46 & 2009-C47 -- C/2008 W3, C/2008 W2, C/2008 V6, C/2008 V5, C/2008 V4, C/2008 V3, C/2008 V2, C/2008 V1
2493LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 2 in MPECs 2009-C46 & 2009-C47 -- C/2008 W3, C/2008 V1
691Spacewatch 0.9m telescope in Arizona, 11 in MPECs 2009-C30 & 2009-C34 -- 2009 CT1, 2009 BH11, 2008 VA15, 2008 TV25, 2005 NJ1, 2002 PG80, 22753, 18109, 153958, 8034, 6050
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2009-C30, 2009-C32, 2009-C34, 2009-C35, 2009-C39 & 2009-C42 -- 2009 CY1, 2009 CU1, 2009 CT1, 2009 CR1, 2009 CB2, 2009 BC58, 159923
611Starkenburg Obs. in Germany, 1 in MPEC 2009-C30 -- 2009 CV
6735Jim Young via Table Mtn. Obs. in southern California, 5 in MPECs 2009-C29, 2009-C31, 2009-C33, 2009-C43 & 2009-C45 -- 2009 CS1, 2009 CR2, 2009 CQ1, 2009 CC2, 2007 BG29
0121Eric Elst via Uccle Obs. in Belgium, 1 in MPEC 2009-C30 -- 2001 BJ16
198Wildberg Obs. in Germany, 1 in MPEC 2009-C30 -- 2009 CV
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 February '09

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.
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
2009 CR2JPL Sentry23582019-210788.6e-09-3.31-3.360JPL: "Analysis based on 19 observations spanning 1.5909 days (2009-Feb-03.30293 to 2009-Feb-04.89386)." Diameter approximately 1.600 km. from mean, weighted H=16.7.
2009 CD2JPL Sentry21162027-210732.4e-08-8.84-9.300JPL: "Analysis based on 14 observations spanning .15108 days (2009-Feb-04.31926 to 2009-Feb-04.47034)." Diameter approximately 0.012 km. from mean, weighted H=27.1.
2009 CZ1JPL Sentry19232014-2106481.2e-06-5.52-6.160JPL: "Analysis based on 19 observations spanning 1.0234 days (2009-Feb-03.38609 to 2009-Feb-04.40948)." Diameter approximately 0.042 km. from mean, weighted H=24.5.
2009 CVJPL Sentry1532R E M O V E DJPL: Risk listing removed at 0957 UTC.
2009 CTNEODyS15322016-2079112.27e-10-5.93-6.450NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2009/02/02.483 to 2009/02/03.554."
2009 CSNEODyS1532203322.87e-11-7.10-7.400NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2009/02/02.413 to 2009/02/03.475."
2009 BD81JPL Sentry15322042-209042.0e-07-4.37-4.660JPL: "Analysis based on 21 observations spanning 2.9160 days (2009-Jan-31.10076 to 2009-Feb-03.016804)." Diameter approximately 0.304 km. from mean, weighted H=20.2.
NEODyS15322042-206551.27e-07-4.44-4.520NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2009/01/31.102 to 2009/02/03.018."

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 4 February '09

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

2358Noted that JPL Sentry has posted 2009 CR2 as an impact risk - see above
2307Grabbed MPEC 2009-C46 - Comets C/2008 V1, 2008 V2, 2008 V3, 2008 V4 (SOHO) - see above
Grabbed MPEC 2009-C47 - Comets C/2008 V5, 2008 V6, 2008 W2, 2008 W3 (SOHO) - see above
2230Grabbed MPEC 2009-C45 - 2009 CR2 - see above
2116Noted that JPL Sentry has posted 2009 CD2 as an impact risk - see above
1923Noted that JPL Sentry has posted 2009 CZ1 as an impact risk - see above
1800Grabbed MPEC 2009-C43 - 2009 CC2 - see above
Grabbed MPEC 2009-C44 - 2009 CD2 - see above
1716Grabbed MPEC 2009-C34 - 2009 CT1 - see above
Grabbed MPEC 2009-C35 - 2009 CU1 - see above
Grabbed MPEC 2009-C36 - 2009 CV1 - see above
Grabbed MPEC 2009-C37 - 2009 CW1 - see above
Grabbed MPEC 2009-C38 - 2009 CX1 - see above
Grabbed MPEC 2009-C39 - 2009 CY1 - see above
Grabbed MPEC 2009-C40 - 2009 CZ1 - see above
Grabbed MPEC 2009-C41 - 2009 CA2 - see above
Grabbed MPEC 2009-C42 - 2009 CB2 - see above
1647Grabbed MPEC 2009-C31 - 2009 CQ1 - see above
Grabbed MPEC 2009-C32 - 2009 CR1 - see above
Grabbed MPEC 2009-C33 - 2009 CS1 - see above
1532Noted that JPL Sentry has updated its 2009 BD81 risk assessment - see above
Noted that NEODyS has updated its 2009 BD81 risk assessment - see above
Noted that NEODyS has posted 2009 CS as an impact risk - see above
Noted that NEODyS has posted 2009 CT as an impact risk - see above
Noted that JPL Sentry has removed 2009 CV as an impact risk - see above
Grabbed MPEC 2009-C30 - Daily Orbit Update - see above
0518Grabbed MPEC 2009-C29 - 2007 BG29 - see above