Contents  on 3 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 3 February '09

The MPC's NEO Confirmation Page has 21 listings: 12 new, 9 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had twelve new and nine updated listings. Of these, 20 were "one nighters." So far The Tracking News has counted a total of 34 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 3 February '09

Minor Planet Electronic Circulars

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


MPEC 2009-C28 - "20:55 UT" - 2009 CZ


MPEC 2009-C27 - "14:44 UT" - 2009 CV


MPEC 2009-C26 - "14:41 UT" - 2009 CU


MPEC 2009-C25 - "14:38 UT" - 2009 CT


MPEC 2009-C24 - "14:35 UT" - 2009 CS


MPEC 2009-C23 - "14:33 UT" - 2009 CR


MPEC 2009-C22 - "14:30 UT" - 2009 CQ


MPEC 2009-C21 - "14:27 UT" - 2009 CP


<< DOU on 3 Feb. '09 >>  MPEC 2009-C20 - "07:07 UT" - Daily Orbit Update

Observers  on 3 February '09

Seventeen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 16 in MPECs 2009-C20 & 2009-C21 -- 2009 CP, 2009 CG, 2009 BP58, 2009 BO58, 2009 BM58, 2009 BJ81, 2009 BH81, 2009 BH58, 2009 BG81, 2009 BG58, 2009 BF81, 2009 BE58, 2009 BD77, 2009 BB11, 2009 AH16, 2008 JG
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2009-C20, 2009-C24, 2009-C25, 2009-C26 & 2009-C28 -- 2009 CZ, 2009 CU, 2009 CT, 2009 CS, 2009 BE58, 2008 EA32
924Cegep de Trois-Rivieres Obs. in Quebec, 1 in MPEC 2009-C20 -- 2009 BD58
A17Guidestar Obs. in Germany, 1 in MPEC 2009-C20 -- 2009 BL2
704LINEAR in New Mexico, 15 in MPEC 2009-C20 -- 2009 BP58, 2009 BM2, 2009 BD58, 2008 YV148, 2008 YR27, 2008 XE2, 2008 TE157, 2008 CH116, 2003 YX1, 2001 OE84, 1999 CW8, 89355, 198856, 153953, 1863
8094Eric Elst via La Silla in Chile, 1 in MPEC 2009-C20 -- 143381
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2009-C21, 2009-C22, 2009-C23 & 2009-C28 -- 2009 CZ, 2009 CR, 2009 CQ, 2009 CP
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2009-C21, 2009-C22, 2009-C23, 2009-C24, 2009-C25, 2009-C26 & 2009-C27 -- 2009 CV, 2009 CU, 2009 CT, 2009 CS, 2009 CR, 2009 CQ, 2009 CP
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-C27 -- 2009 CV
H06[Paul Camilleri in New South Wales via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-C24 -- 2009 CS
H06\B. Conklin via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-C20 -- 12711
E12Siding Spring Survey in New South Wales, 1 in MPEC 2009-C20 -- 2009 AM15
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2009-C20 -- 89830, 198752
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2009-C20 & 2009-C23 -- 2009 CR, 2009 BF58, 2009 AV
611Starkenburg Obs. in Germany, 1 in MPEC 2009-C28 -- 2009 CZ
6735Jim Young via Table Mtn. Obs. in southern California, 4 in MPECs 2009-C21, 2009-C24, 2009-C27 & 2009-C28 -- 2009 CZ, 2009 CV, 2009 CS, 2009 CP
926Tenagra II Obs. in Arizona, 3 in MPECs 2009-C21, 2009-C25 & 2009-C26 -- 2009 CU, 2009 CT, 2009 CP
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-C27 -- 2009 CV
198Wildberg Obs. in Germany, 1 in MPEC 2009-C27 -- 2009 CV
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 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 CZJPL Sentry2246201612.8e-10-4.35-4.350JPL: "Analysis based on 16 observations spanning .60826 days (2009-Feb-03.23678 to 2009-Feb-03.84504)." Diameter approximately 1.300 km. from mean, weighted H=17.1.
2009 CVJPL Sentry17582056-2105151.7e-08-7.93-8.450JPL: "Analysis based on 31 observations spanning .63955 days (2009-Feb-02.91531 to 2009-Feb-03.55486)." Diameter approximately 0.045 km. from mean, weighted H=24.4.
2009 CTJPL Sentry17582013-2079152.6e-09-5.09-5.440JPL: "Analysis based on 15 observations spanning 1.0710 days (2009-Feb-02.48186 to 2009-Feb-03.55282)." Diameter approximately 0.486 km. from mean, weighted H=19.2.
2009 CSJPL Sentry1758208011.2e-10-7.17-7.170JPL: "Analysis based on 13 observations spanning 1.0621 days (2009-Feb-02.41199 to 2009-Feb-03.47407)." Diameter approximately 0.530 km. from mean, weighted H=19.0.
2009 BF81JPL Sentry1442209115.6e-06-5.62-5.620JPL: "Analysis based on 33 observations spanning 2.2283 days (2009-Jan-31.24321 to 2009-Feb-02.47156)." Diameter approximately 0.031 km. from mean, weighted H=25.2.
NEODyS1442207712.18e-09-8.93-8.930NEODyS: "Based on 35 optical observations (of which 2 are rejected as outliers) from 2009/01/31.244 to 2009/02/02.472."
2009 BD81NEODyS14422025-208991.31e-07-4.37-4.570NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2009/01/31.102 to 2009/02/02.310."
2009 BF58JPL Sentry14422057-2109573.2e-04-4.94-5.350JPL: "Analysis based on 41 observations spanning 6.0032 days (2009-Jan-28.26267 to 2009-Feb-03.26586)." Diameter approximately 0.012 km. from mean, weighted H=27.3.
NEODyS14422057-2090292.1e-04-5.08-5.360NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2009/01/28.263 to 2009/02/03.267."

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 3 February '09

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

2246Noted that JPL Sentry has posted 2009 CZ as an impact risk - see above
2059Grabbed MPEC 2009-C28 - 2009 CZ - see above
1758Noted that JPL Sentry has posted 2009 CS as an impact risk - see above
Noted that JPL Sentry has posted 2009 CT as an impact risk - see above
Noted that JPL Sentry has posted 2009 CV as an impact risk - see above
1532Grabbed MPEC 2009-C27 - 2009 CV - see above
1442Noted that NEODyS has posted 2009 BD81 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 BF58 risk assessment - see above
Noted that NEODyS has updated its 2009 BF58 risk assessment - see above
Noted that JPL Sentry has updated its 2009 BF81 risk assessment - see above
Noted that NEODyS has posted 2009 BF81 as an impact risk - see above
Grabbed MPEC 2009-C20 - Daily Orbit Update - see above
Grabbed MPEC 2009-C21 - 2009 CP - see above
Grabbed MPEC 2009-C22 - 2009 CQ - see above
Grabbed MPEC 2009-C23 - 2009 CR - see above
Grabbed MPEC 2009-C24 - 2009 CS - see above
Grabbed MPEC 2009-C25 - 2009 CT - see above
Grabbed MPEC 2009-C26 - 2009 CU - see above