Contents  on 21 March '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 21 March '09

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 0556 UTC when the database was dated 20 March

NEOCP Activity  on 21 March '09

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

When last checked at 2359 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 eighteen listings on the NEOCP at some point today.

New MPECs  on 21 March '09

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2009-F58 - "21:45 UT" - 2009 FZ10


MPEC 2009-F57 - "21:42 UT" - 2009 FY10


MPEC 2009-F56 - "21:39 UT" - 2009 FX10


MPEC 2009-F55 - "18:30 UT" - 2009 EC


MPEC 2009-F54 - "15:43 UT" - Comet C/2009 F4 (McNaught)


<< DOU on 21 Mar. '09 >>  MPEC 2009-F53 - "06:11 UT" - Daily Orbit Update


MPEC 2009-F52 - "01:36 UT" - 1999 EF5

Observers  on 21 March '09

A total of 35 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 18 in MPECs 2009-F53 & 2009-F54 -- 2009 FS, 2009 FR, 2009 FL, 2009 FJ1, 2009 FE, C/2009 F4, 2009 EG1, 2009 ED1, 2009 DZ, 2009 DT10, 2009 DO111, 2009 DN1, 2009 DM1, 2009 CZ2, 2009 CP5, 2009 BL2, 2008 WC14, 2008 QS11
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2009-F53 -- 2009 BM2
432Boambee Obs. in New South Wales, 3 in MPEC 2009-F53 -- 164400, 3199, 1036
235CAST Obs. in Italy, 1 in MPEC 2009-F52 -- 1999 EF5
493Calar Alto Obs. in Spain, 3 in MPECs 2009-F56, 2009-F57 & 2009-F58 -- 2009 FZ10, 2009 FY10, 2009 FX10
703Catalina Sky Survey (CSS) in Arizona, 23 in MPECs 2009-F53, 2009-F55, 2009-F56 & 2009-F58 -- 2009 FZ10, 2009 FX10, 2009 EC, 2008 UV91, 38086, 25916, 22771, 208565, 20460, 203217, 162900, 138883, 10302, 8566, 7977, 7480, 7088, 5693, 5620, 3271, 3199, 3102, 1863
B60Deep Sky Obs. in Germany, 2 in MPEC 2009-F53 -- 35107, 4179
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2009-F53 -- 2008 WL60
808El Leoncito Obs. in Argentina, 1 in MPEC 2009-F54 -- C/2009 F4
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2009-F52 -- 1999 EF5
252Goldstone DSS-13 34m antenna in southern California, 1 in radar -- 2009 DO111
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2009 DO111
J95Great Shefford Obs. in England, 4 in MPECs 2009-F52 & 2009-F53 -- 2009 FY4, 2009 FX4, 2009 FD, 1999 EF5
A17Guidestar Obs. in Germany, 6 in MPECs 2009-F52, 2009-F53 & 2009-F56 -- 2009 FX10, 2009 FT, 2009 FG1, 2009 FD, 2009 DZ, 1999 EF5
379Hamamatsu-Yuto Obs. in Japan, 6 in MPEC 2009-F53 -- 2009 FJ, 2009 FA, 2009 EP2, 2008 WL60, 2007 BT2, 2006 BC10
704LINEAR in New Mexico, 6 in MPECs 2009-F52 & 2009-F53 -- 2005 SG19, 1999 EF5, 22771, 203217, 155334, 4179
J75La Sagra Obs. in Spain, 13 in MPEC 2009-F53 -- 2009 FD, 2009 EF3, 2002 EZ2, 99935, 35396, 207970, 206910, 162080, 155334, 3122, 3103, 3102, 2329
130Lumezzane Obs. in Italy, 8 in MPEC 2009-F53 -- 2009 FJ, 2009 EP2, 2009 CZ2, 2008 OB9, 2006 BC10, 2004 EU9, 2001 CK32, 206910
F86Moana Obs. in Tahiti, 1 in MPEC 2009-F54 -- C/2009 F4
900Moriyama Obs. in Japan, 2 in MPEC 2009-F53 -- 2009 FW4, 2009 EP2
474Mt. John Obs. in New Zealand, 1 in MPEC 2009-F58 -- 2009 FZ10
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2009-F57 -- 2009 FY10
A13Naef Obs. in Switzerland, 1 in MPEC 2009-F58 -- 2009 FZ10
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPEC 2009-F53 -- 2009 FJ, 2009 FD, 2009 FA, 2009 EP2, 2009 DF1, 2009 CO5, 2008 YE29, 2007 BT2
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPECs 2009-F55 & 2009-F58 -- 2009 FZ10, 2009 EC
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-F54 -- C/2009 F4
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2009-F54, 2009-F56 & 2009-F58 -- 2009 FZ10, 2009 FX10, C/2009 F4
204Schiaparelli Obs. in Italy, 7 in MPEC 2009-F53 -- 2009 FA, 2009 EP2, 2009 EG1, 2009 EC1, 2009 DR3, 2008 EY5, 2004 EU9
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2009-F53 & 2009-F54 -- C/2009 F4, 2008 YR2
587Sormano Obs. in Italy, 9 in MPEC 2009-F53 -- 2009 FY4, 2009 FX4, 2009 FJ, 2009 FE, 2009 FD, 2009 FA, 2009 DZ, 2009 DH39, 2009 CQ5
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2009-F53 -- 2009 EQ2, 2009 CU1
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2009-F53 -- 2009 FP
611Starkenburg Obs. in Germany, 3 in MPECs 2009-F52, 2009-F53 & 2009-F56 -- 2009 FX10, 2009 FA, 1999 EF5
673Table Mtn. Obs. in southern California, 1 in MPEC 2009-F54 -- C/2009 F4
198Wildberg Obs. in Germany, 1 in MPEC 2009-F53 -- 2009 FY4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 March '09

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
2009 FZ10JPL Sentry23592082-210896.3e-08-7.64-7.920JPL: "Analysis based on 25 observations spanning .56151 days (2009-Mar-21.32461 to 2009-Mar-21.886117)." Diameter approximately 0.027 km. from mean, weighted H=25.5.
2009 FY10JPL Sentry23592012-205571.6e-09-5.23-5.280JPL: "Analysis based on 14 observations spanning .60597 days (2009-Mar-21.22287 to 2009-Mar-21.828839)." Diameter approximately 0.310 km. from mean, weighted H=20.2.
2009 FZ4NEODyS15572014-2088813.27e-07-6.31-6.890NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2009/03/19.371 to 2009/03/19.970."
JPL Sentry04252013-21084422.4e-06-5.44-6.340JPL: "Analysis based on 11 observations spanning .59999 days (2009-Mar-19.36974 to 2009-Mar-19.96973)." Diameter approximately 0.031 km. from mean, weighted H=25.2.
2009 FV4NEODyS15572013-2090441.35e-09-4.29-4.580NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2009/03/19.283 to 2009/03/20.246."
JPL Sentry0425201611.7e-10-4.94-4.940JPL: "Analysis based on 14 observations spanning .96322 days (2009-Mar-19.28213 to 2009-Mar-20.245353)." Diameter approximately 0.880 km. from mean, weighted H=17.9.
2009 FU4NEODyS1557204515.89e-10-5.00-5.000NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2009/03/19.275 to 2009/03/20.376."
JPL Sentry0425209018.3e-10-5.54-5.540JPL: "Analysis based on 21 observations spanning 1.1004 days (2009-Mar-19.2744 to 2009-Mar-20.37477)." Diameter approximately 1.100 km. from mean, weighted H=17.5.
2009 FS4JPL Sentry0425207912.8e-10-9.80-9.800JPL: "Analysis based on 18 observations spanning .93618 days (2009-Mar-18.94834 to 2009-Mar-19.88452)." Diameter approximately 0.030 km. from mean, weighted H=25.3.
2009 FG1NEODyS15572038-208163.53e-08-3.42-3.570NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2009/03/17.305 to 2009/03/21.000."
JPL Sentry15562038-206133.0e-08-3.48-3.630JPL #2 for the day: "Analysis based on 31 observations spanning 3.6951 days (2009-Mar-17.30415 to 2009-Mar-20.99926)." Diameter approximately 0.790 km. from mean, weighted H=18.2.
2009 FSNEODyS1557209012.86e-09-8.37-8.370NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2009/03/17.257 to 2009/03/20.122."
JPL Sentry1556209012.7e-09-8.33-8.330JPL: "Analysis based on 33 observations spanning 2.8652 days (2009-Mar-17.25582 to 2009-Mar-20.121002)." Diameter approximately 0.049 km. from mean, weighted H=24.2.
2009 FPJPL Sentry1556209515.9e-10-8.41-8.410JPL #2 for the day: "Analysis based on 28 observations spanning 3.0346 days (2009-Mar-17.26958 to 2009-Mar-20.30417)." Diameter approximately 0.090 km. from mean, weighted H=22.9.
2009 FJNEODyS15572058-208866.08e-05-4.26-4.280NEODyS: "Based on 91 optical observations (of which 7 are rejected as outliers) from 2009/03/17.245 to 2009/03/20.903."
JPL Sentry15562058-2107116.4e-05-4.25-4.280JPL #2 for the day: "Analysis based on 84 observations spanning 3.5935 days (2009-Mar-17.30916 to 2009-Mar-20.90262)." Diameter approximately 0.035 km. from mean, weighted H=24.9.
2009 FGJPL Sentry04252022-2106307.4e-06-5.53-6.320JPL: "Analysis based on 45 observations spanning 2.9484 days (2009-Mar-16.3986 to 2009-Mar-19.34695)." Diameter approximately 0.027 km. from mean, weighted H=25.5.
2009 FENEODyS1557204415.68e-06-3.44-3.440NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2009/03/16.280 to 2009/03/20.991."
JPL Sentry15562044-210346.0e-06-3.42-3.430JPL #2 for the day: "Analysis based on 42 observations spanning 4.7113 days (2009-Mar-16.27919 to 2009-Mar-20.99046)." Diameter approximately 0.180 km. from mean, weighted H=21.4.
2009 DO111JPL Sentry0705R E M O V E DJPL #2 for the day: Risk listing removed at 0657 UTC.

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 March '09

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

2359Noted that JPL Sentry has posted 2009 FY10 as an impact risk - see above
Noted that JPL Sentry has posted 2009 FZ10 as an impact risk - see above
2319Grabbed MPEC 2009-F56 - 2009 FX10 - see above
Grabbed MPEC 2009-F57 - 2009 FY10 - see above
Grabbed MPEC 2009-F58 - 2009 FZ10 - see above
1843Grabbed MPEC 2009-F55 - 2009 EC - see above
1557Noted that NEODyS has updated its 2009 FE risk assessment - see above
Noted that NEODyS has updated its 2009 FG1 risk assessment - see above
Noted that NEODyS has updated its 2009 FJ risk assessment - see above
Noted that NEODyS has updated its 2009 FS risk assessment - see above
Grabbed MPEC 2009-F54 - Comet C/2009 F4 (McNaught) - see above
1556Noted that JPL Sentry has updated its 2009 FE risk assessment - see above
Noted that JPL Sentry has updated its 2009 FG1 risk assessment - see above
Noted that JPL Sentry has updated its 2009 FJ risk assessment - see above
Noted that JPL Sentry has updated its 2009 FP risk assessment - see above
Noted that JPL Sentry has reposted 2009 FS as an impact risk - see above
Noted that NEODyS has posted 2009 FU4 as an impact risk - see above
Noted that NEODyS has posted 2009 FV4 as an impact risk - see above
Noted that NEODyS has posted 2009 FZ4 as an impact risk - see above
0727Grabbed MPEC 2009-F53 - Daily Orbit Update - see above
0705Noted that JPL Sentry has removed 2009 DO111 as an impact risk - see above
0556Noted Radar Astrometry database update - see above
0425Noted that JPL Sentry has updated its 2009 DO111 risk assessment - see above
Noted that JPL Sentry has updated its 2009 FE risk assessment - see above
Noted that JPL Sentry has updated its 2009 FG risk assessment - see above
Noted that JPL Sentry has updated its 2009 FG1 risk assessment - see above
Noted that JPL Sentry has updated its 2009 FJ risk assessment - see above
Noted that JPL Sentry has updated its 2009 FP risk assessment - see above
Noted that JPL Sentry has reposted 2009 FS4 as an impact risk - see above
Noted that JPL Sentry has reposted 2009 FU4 as an impact risk - see above
Noted that JPL Sentry has reposted 2009 FV4 as an impact risk - see above
Noted that JPL Sentry has reposted 2009 FZ4 as an impact risk - see above
0208Grabbed MPEC 2009-F52 - 1999 EF5 - see above