Contents  on 16 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.

Radar Astrometry  on 16 February '09

Radar observation of two objects

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


Data update noted at 2259 UTC when the database was dated 16 Feb.


Data update noted at 2358 UTC when the database was dated 16 Feb.

NEOCP Activity  on 16 February '09

The MPC's NEO Confirmation Page has 4 listings: 4 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of twelve 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 16 February '09

Minor Planet Electronic Circulars

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


<< DOU on 16 Feb. '09 >>  MPEC 2009-D07 - "07:06 UT" - Daily Orbit Update


MPEC 2009-D06 - "02:58 UT" - 2009 CU5


MPEC 2009-D05 - "02:55 UT" - 2009 CV5


MPEC 2009-D04 - "02:51 UT" - 2009 CT5


MPEC 2009-D03 - "02:49 UT" - 2009 CS5


MPEC 2009-D02 - "02:47 UT" - 2009 CR5


MPEC 2009-D01 - "02:44 UT" - 2009 CQ5

Observers  on 16 February '09

A total of 27 observing facilities appear in today's MPECs.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 1 in MPEC 2009-D07 -- 2005 YS165
251Arecibo in Puerto Rico, 2 in radar -- 2008 EE5, 207398
H55Astronomical Research Obs. (ARO) in Illinois, 9 in MPECs 2009-D02, 2009-D03, 2009-D04, 2009-D06 & 2009-D07 -- 2009 CX2, 2009 CU5, 2009 CT5, 2009 CS5, 2009 CR5, 2009 CP5, 2009 CO5, 2009 BH81, 2009 BD77
A81Balzaretto Obs. in Italy, 1 in MPEC 2009-D04 -- 2009 CT5
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2009-D07 -- 2003 WP25
493Calar Alto Obs. in Spain, 6 in MPECs 2009-D01, 2009-D02, 2009-D03, 2009-D04, 2009-D05 & 2009-D06 -- 2009 CV5, 2009 CU5, 2009 CT5, 2009 CS5, 2009 CR5, 2009 CQ5
J79Calarreona Obs. in Spain, 1 in MPEC 2009-D07 -- 4179
703Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2009-D01, 2009-D05 & 2009-D07 -- 2009 CV5, 2009 CQ5, 25916, 162080, 138175, 137925, 10302
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2009-D04 -- 2009 CT5
B84Cyclops Obs. in The Netherlands, 1 in MPEC 2009-D07 -- 2009 CR2
J27El Guijo Obs. in Spain, 1 in MPEC 2009-D07 -- 137925
143Gnosca Obs. in Switzerland, 1 in MPEC 2009-D04 -- 2009 CT5
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 207398
704LINEAR in New Mexico, 11 in MPECs 2009-D05 & 2009-D07 -- 2009 CV5, 2009 CO5, 2008 TE157, 89355, 25916, 198856, 153953, 143651, 137925, 137805, 1863
J75La Sagra Obs. in Spain, 1 in MPEC 2009-D06 -- 2009 CU5
B33Libbiano Obs. in Italy, 2 in MPECs 2009-D05 & 2009-D06 -- 2009 CV5, 2009 CU5
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2009-D07 -- 101873
A13Naef Obs. in Switzerland, 2 in MPEC 2009-D07 -- 2008 UC95, 25916
A53Peschiera del Garda Obs. in Italy, 3 in MPEC 2009-D07 -- 2008 EE5, 2008 EE, 206359
H06^program code "^" (28) via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-D07 -- 1999 AQ10
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2009-D01, 2009-D04, 2009-D05 & 2009-D06 -- 2009 CV5, 2009 CU5, 2009 CT5, 2009 CQ5
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-D06 -- 2009 CU5
204Schiaparelli Obs. in Italy, 2 in MPECs 2009-D01 & 2009-D04 -- 2009 CT5, 2009 CQ5
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2009-D02 & 2009-D03 -- 2009 CS5, 2009 CR5
H53Thompsonville Obs. in Illinois, 2 in MPEC 2009-D07 -- 2008 EE5, 2000 BL19
F85Tiki Obs. in Tahiti, 1 in MPEC 2009-D04 -- 2009 CT5
198Wildberg Obs. in Germany, 1 in MPEC 2009-D07 -- 2009 CV
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 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 CV5NEODyS15332035-207548.65e-07-5.89-6.010NEODyS: "Based on 29 optical observations (of which 1 are rejected as outliers) from 2009/02/15.269 to 2009/02/15.939."
JPL Sentry06052093-210829.1e-08-7.27-7.270JPL: "Analysis based on 29 observations spanning .67021 days (2009-Feb-15.26778 to 2009-Feb-15.93799)." Diameter approximately 0.039 km. from mean, weighted H=24.7.
2009 CQ5NEODyS15332013-2089331.35e-07-2.67-2.990NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2009/02/14.096 to 2009/02/15.802."
JPL Sentry06052013-21081323.1e-07-2.40-2.680JPL: "Analysis based on 19 observations spanning 1.7053 days (2009-Feb-14.09547 to 2009-Feb-15.80079)." Diameter approximately 1.100 km. from mean, weighted H=17.5.
2009 CR2JPL Sentry1533202411.3e-10-5.07-5.070JPL: "Analysis based on 30 observations spanning 11.496 days (2009-Feb-03.30293 to 2009-Feb-14.79845)." Diameter approximately 1.700 km. from mean, weighted H=16.5.
NEODyS1533R 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 16 February '09

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

2358Noted Radar Astrometry database update - see above
2259Noted Radar Astrometry database update - see above
1533Noted that NEODyS has posted 2009 CQ5 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 CR2 risk assessment - see above
Noted that NEODyS has removed 2009 CR2 as an impact risk - see above
Noted that NEODyS has posted 2009 CV5 as an impact risk - see above
Grabbed MPEC 2009-D07 - Daily Orbit Update - see above
0607Grabbed MPEC 2009-D01 - 2009 CQ5 - see above
Grabbed MPEC 2009-D02 - 2009 CR5 - see above
Grabbed MPEC 2009-D03 - 2009 CS5 - see above
Grabbed MPEC 2009-D04 - 2009 CT5 - see above
Grabbed MPEC 2009-D05 - 2009 CV5 - see above
Grabbed MPEC 2009-D06 - 2009 CU5 - see above
0605Noted that JPL Sentry has posted 2009 CQ5 as an impact risk - see above
Noted that JPL Sentry has posted 2009 CV5 as an impact risk - see above