Contents  on 23 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 23 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 2315 UTC when the database was dated 23 March

NEOCP Activity  on 23 March '09

The MPC's NEO Confirmation Page has 9 listings: 3 new, 6 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and six updated listings. Of these, five were "one nighters." The Tracking News counted a total of fifteen listings on the NEOCP at some point on this day.

New MPECs  on 23 March '09

Minor Planet Electronic Circulars

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


MPEC 2009-F66 - "20:23 UT" - 1999 FJ21


MPEC 2009-F65 - "11:45 UT" - 2009 FG19


MPEC 2009-F64 - "11:39 UT" - 2009 FF19


MPEC 2009-F63 - "11:36 UT" - 2009 FE19


<< DOU on 23 Mar. '09 >>  MPEC 2009-F62 - "06:12 UT" - Daily Orbit Update

Observers  on 23 March '09

A total of 25 observing facilities appeared in this day's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 13 in MPECs 2009-F62, 2009-F63 & 2009-F65 -- 2009 FZ10, 2009 FY10, 2009 FV4, 2009 FU4, 2009 FS, 2009 FG19, 2009 FE19, 2009 EH3, 2009 CZ2, 2009 BH58, 2008 XP2, 2008 WK, 2002 FD
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2009-F62 -- 2009 FD, 2009 FA
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2009-F62 -- 2009 BH81
B88Bigmuskie Obs. in Italy, 2 in MPEC 2009-F62 -- 2006 WZ2, 2002 EZ2
493Calar Alto Obs. in Spain, 4 in MPECs 2009-F62, 2009-F63, 2009-F64 & 2009-F65 -- 2009 FS4, 2009 FG19, 2009 FF19, 2009 FE19
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2009-F62 & 2009-F66 -- 2008 JG, 1999 FJ21, 85275, 208565, 155341, 14402, 3271, 3103
J65Celbridge Obs. in Ireland, 3 in MPEC 2009-F62 -- 2009 FA, 68350, 208565
A77Chante-Perdrix Obs. in France, 1 in MPEC 2009-F62 -- 2002 EZ2
143Gnosca Obs. in Switzerland, 3 in MPEC 2009-F62 -- 2009 FJ, 2009 FH, 2009 DO111
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2009 DR3
J95Great Shefford Obs. in England, 1 in MPEC 2009-F66 -- 1999 FJ21
D80Gunma Obs. in Japan, 3 in MPEC 2009-F62 -- 2009 FX4, 2009 FW4, 2009 FJ
704LINEAR in New Mexico, 11 in MPEC 2009-F62 -- 2009 CZ2, 2008 EE, 85953, 35396, 22771, 22753, 209924, 8567, 7358, 3122, 1627
I36Los Campitos Obs. in Argentina, 3 in MPEC 2009-F62 -- 2009 DL1, 2006 GQ2, 2005 SG19
560Madonna di Dossobuono Obs. in Italy, 4 in MPEC 2009-F62 -- 2009 FA, 2009 EP2, 2009 CR2, 2009 BP58
474Mt. John Obs. in New Zealand, 5 in MPECs 2009-F62, 2009-F63 & 2009-F65 -- 2009 FV4, 2009 FS4, 2009 FG19, 2009 FF, 2009 FE19
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2009-F62, 2009-F63, 2009-F64 & 2009-F65 -- 2009 FG19, 2009 FF19, 2009 FE19, 2006 EV52, 35396, 3102
J93Mt. Tuffley Obs. in England, 2 in MPEC 2009-F62 -- 14402, 1036
A13Naef Obs. in Switzerland, 1 in MPEC 2009-F62 -- 141495
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-F66 -- 1999 FJ21
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-F65 -- 2009 FG19
204Schiaparelli Obs. in Italy, 5 in MPEC 2009-F62 -- 2009 FK, 2009 EM1, 2009 EF3, 2009 DH39, 2008 SV11
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2009-F62 -- 16834, 3552
B40Skylive Obs. in Italy, 3 in MPEC 2009-F62 -- 2009 FA, 2008 WL60, 2007 BT2
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-F62 -- 2009 FA
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 March '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 FG19JPL Sentry2358R E M O V E DJPL #2 for the day
2009 FZ10JPL Sentry2358R E M O V E DJPL #2 for the day
2009 FY10JPL Sentry1326R E M O V E DJPL: Risk listing removed at 0935 UTC.
NEODyS1326R E M O V E D-
2009 FV4JPL Sentry1326R E M O V E D
NEODyS1326R E M O V E D-
2009 FU4JPL Sentry2358209018.3e-10-5.54-5.540JPL #2 for the day: "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.
NEODyS1326R E M O V E D-
2009 FS4JPL Sentry2358207912.8e-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.
NEODyS1326R E M O V E D-
2009 FG1JPL Sentry23582015-207881.5e-08-3.72-4.160JPL: "Analysis based on 28 observations spanning 2.1644 days (2009-Mar-17.30415 to 2009-Mar-19.46852)." Diameter approximately 0.800 km. from mean, weighted H=18.1.
2009 FSJPL Sentry1326R E M O V E DJPL: Risk listing removed at 0931 UTC.
NEODyS1326R E M O V E D-
2009 FPJPL Sentry23582092-209521.2e-08-7.10-7.290JPL: "Analysis based on 25 observations spanning 1.9035 days (2009-Mar-17.26958 to 2009-Mar-19.17305)." Diameter approximately 0.090 km. from mean, weighted H=22.9.
2009 FJJPL Sentry23582058-2107104.2e-05-4.41-4.440JPL #2 for the day: "Analysis based on 64 observations spanning 1.8390 days (2009-Mar-17.30916 to 2009-Mar-19.14818)." Diameter approximately 0.036 km. from mean, weighted H=24.9.
NEODyS13272058-208896.32e-05-4.24-4.260NEODyS: "Based on 96 optical observations (of which 7 are rejected as outliers) from 2009/03/17.245 to 2009/03/20.903."
2009 FGJPL Sentry23582022-2106307.4e-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 FEJPL Sentry23582028-210374.8e-06-3.51-3.560JPL: "Analysis based on 36 observations spanning 3.1769 days (2009-Mar-16.27919 to 2009-Mar-19.45608)." Diameter approximately 0.181 km. from mean, weighted H=21.4.
2009 DO111JPL Sentry23582091-210863.2e-05-3.85-3.860JPL: "Analysis based on 157 observations spanning 25.590 days (2009-Feb-22.33494 to 2009-Mar-19.92475)." Diameter approximately 0.089 km. from mean, weighted H=22.9.

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 23 March '09

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

2358Noted that JPL Sentry has reposted 2009 DO111 as an impact risk - 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 removed 2009 FG19 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 FJ risk assessment - see above
Noted that JPL Sentry has reposted 2009 FP as an impact risk - see above
Noted that JPL Sentry has reposted 2009 FS4 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 FU4 risk assessment - see above
Noted that JPL Sentry has reposted 2009 FV4 as an impact risk - see above
Noted that JPL Sentry has removed 2009 FZ10 as an impact risk - see above
2315Noted Radar Astrometry database update - see above
2100Grabbed MPEC 2009-F66 - 1999 FJ21 - see above
1431Noted that JPL Sentry has posted 2009 FG19 as an impact risk - see above
1327Noted that NEODyS has updated its 2009 FJ risk assessment - see above
1326Noted that JPL Sentry has updated its 2009 FJ risk assessment - see above
Noted that JPL Sentry has removed 2009 FS as an impact risk - see above
Noted that NEODyS has removed 2009 FS as an impact risk - see above
Noted that NEODyS has removed 2009 FS4 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 FU4 risk assessment - see above
Noted that NEODyS has removed 2009 FU4 as an impact risk - see above
Noted that JPL Sentry has removed 2009 FV4 as an impact risk - see above
Noted that NEODyS has removed 2009 FV4 as an impact risk - see above
Noted that JPL Sentry has removed 2009 FY10 as an impact risk - see above
Noted that NEODyS has removed 2009 FY10 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 FZ10 risk assessment - see above
Grabbed MPEC 2009-F62 - Daily Orbit Update - see above
Grabbed MPEC 2009-F63 - 2009 FE19 - see above
Grabbed MPEC 2009-F64 - 2009 FF19 - see above
Grabbed MPEC 2009-F65 - 2009 FG19 - see above