Contents  on 27 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.

NEOCP Activity  on 27 March '09

The MPC's NEO Confirmation Page has 3 listings: 3 new

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new listings. All of these were "one nighters." So far The Tracking News has counted a total of eight listings 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 27 March '09

Minor Planet Electronic Circulars

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


MPEC 2009-F90 - "15:33 UT" - 2009 FY29


<< DOU on 27 Mar. '09 >>  MPEC 2009-F89 - "06:12 UT" - Daily Orbit Update


MPEC 2009-F88 - "02:41 UT" - 2009 FP29

Observers  on 27 March '09

A total of 22 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 2 in MPEC 2009-F89 -- 2008 EV5, 2008 EE
432Boambee Obs. in New South Wales, 5 in MPEC 2009-F89 -- 18882, 187026, 16834, 153306, 4957
493Calar Alto Obs. in Spain, 2 in MPECs 2009-F88 & 2009-F89 -- 2009 FS4, 2009 FP29
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2009-F89 -- 2008 EV5, 164207
157Frasso Sabino Obs. in Italy, 2 in MPEC 2009-F89 -- 2009 CR2, 2009 CQ1
203GiaGa Obs. in Italy, 2 in MPEC 2009-F89 -- 2009 FD, 2009 FA
J95Great Shefford Obs. in England, 6 in MPECs 2009-F88, 2009-F89 & 2009-F90 -- 2009 FY29, 2009 FV23, 2009 FU23, 2009 FP29, 2009 FL25, 2009 FD
E16Grove Creek Obs. in New South Wales, 2 in MPEC 2009-F89 -- 2009 FP28, 2009 FO28
J75La Sagra Obs. in Spain, 4 in MPEC 2009-F89 -- 2005 SG19, 2004 FU64, 206910, 155334
B33Libbiano Obs. in Italy, 1 in MPEC 2009-F89 -- 2008 SV11
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2009-F88, 2009-F89 & 2009-F90 -- 2009 FY29, 2009 FP29, 2009 FF, 2009 EF3, 2005 SN25, 2002 PG80, 206910, 190208, 138883, 2329, 1620
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2009-F89 -- 2009 FU4
A24New Millennium Obs. in Italy, 9 in MPEC 2009-F89 -- 2006 WZ2, 2005 EM30, 85953, 25916, 22771, 206910, 8566, 4179, 3122
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2009-F89 -- 2009 FO28
434San Benedetto Po Obs. in Italy, 3 in MPEC 2009-F89 -- 162900, 4257, 3554
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-F89 -- 2009 FN28
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2009-F89 -- 2009 FA
691Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2009-F89 -- 2009 FR, 2008 EN82, 2004 FU64, 40329, 189008, 163760, 159459
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2009-F89 & 2009-F90 -- 2009 FY29, 2009 FT4, 2009 FJ, 2009 FG19, 2009 DK46, 2009 DA45, 2009 CN5, 138883
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-F89 -- 2009 FL25
A48Verona Obs. in Italy, 1 in MPEC 2009-F89 -- 2009 FA
G56Walnut Creek Obs. in northern California, 1 in MPEC 2009-F89 -- 8566
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 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 Sentry13382018-2103431.5e-07-2.74-3.200JPL: "Analysis based on 42 observations spanning 4.9209 days (2009-Mar-21.44815 to 2009-Mar-26.36907)." Diameter approximately 0.819 km. from mean, weighted H=18.1.
NEODyS13382018-2090441.39e-07-2.76-3.220NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2009/03/21.449 to 2009/03/26.370."
2009 FJJPL Sentry13382058-2107115.2e-05-4.31-4.340JPL: "Analysis based on 101 observations spanning 9.0362 days (2009-Mar-17.30916 to 2009-Mar-26.34533)." Diameter approximately 0.036 km. from mean, weighted H=24.9.
NEODyS13382058-208875.03e-05-4.32-4.340NEODyS: "Based on 108 optical observations (of which 7 are rejected as outliers) from 2009/03/17.245 to 2009/03/26.346."

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 27 March '09

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

1540Grabbed MPEC 2009-F90 - 2009 FY29 - see above
1338Noted that JPL Sentry has updated its 2009 FG19 risk assessment - see above
Noted that NEODyS has updated its 2009 FG19 risk assessment - see above
Noted that JPL Sentry has updated its 2009 FJ risk assessment - see above
Noted that NEODyS has updated its 2009 FJ risk assessment - see above
Grabbed MPEC 2009-F89 - Daily Orbit Update - see above
0402Grabbed MPEC 2009-F88 - 2009 FP29 - see above