Contents  on 22 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 22 March '09

The MPC's NEO Confirmation Page has 10 listings: 2 new, 8 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and eight updated listings. Of these, five were "one nighters." So far The Tracking News has counted a total of twelve 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 22 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-F61 - "21:24 UT" - 2007 LA15


MPEC 2009-F60 - "17:04 UT" - Comet C/2009 F5 (McNaught)


<< DOU on 22 Mar. '09 >>  MPEC 2009-F59 - "06:11 UT" - Daily Orbit Update

Observers  on 22 March '09

A total of 28 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 3 in MPECs 2009-F59 & 2009-F61 -- 2009 DL46, 2009 DE47, 2007 LA15
B88Bigmuskie Obs. in Italy, 5 in MPEC 2009-F59 -- 2009 FA, 2009 DL1, 2008 WL60, 2005 EF, 208565
127Bornheim Obs. in Germany, 1 in MPEC 2009-F59 -- 2009 DO111
493Calar Alto Obs. in Spain, 2 in MPEC 2009-F59 -- 2009 FS4, 2009 FD
703Catalina Sky Survey (CSS) in Arizona, 16 in MPEC 2009-F59 -- 2009 FA, 2009 DE47, 2008 YE29, 2008 SW150, 2006 SV19, 2005 EM30, 2004 EU9, 99935, 86666, 206910, 155336, 143651, 141495, 101873, 7753, 7088
J27El Guijo Obs. in Spain, 2 in MPEC 2009-F59 -- 2007 BT2, 143651
808El Leoncito Obs. in Argentina, 1 in MPEC 2009-F60 -- C/2009 F5
151Eschenberg Obs. in Switzerland, 1 in MPEC 2009-F59 -- 2009 FA
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2009-F60 -- C/2009 F5
458Guadarrama Obs. in Spain, 3 in MPEC 2009-F59 -- 68350, 162900, 3554
240Herrenberg Obs. in Germany, 3 in MPEC 2009-F59 -- 2007 BT2, 2005 EM30, 153953
F84Hibiscus Obs. in Tahiti, 1 in MPEC 2009-F59 -- 2009 FX4
J28Jaen Obs. in Spain, 1 in MPEC 2009-F59 -- 198856
J75La Sagra Obs. in Spain, 2 in MPEC 2009-F59 -- 99935, 35396
474Mt. John Obs. in New Zealand, 1 in MPEC 2009-F60 -- C/2009 F5
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPEC 2009-F59 -- 2009 FS4, 2009 CZ2, 2006 FV35, 2001 DR8, 18109
J93Mt. Tuffley Obs. in England, 1 in MPEC 2009-F59 -- 1036
A13Naef Obs. in Switzerland, 4 in MPEC 2009-F59 -- 2009 FG1, 99935, 155336, 141495
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-F60 -- C/2009 F5
J41Raheny Obs. in Ireland, 6 in MPEC 2009-F59 -- 2009 FZ10, 2009 FA, 68350, 208565, 143651, 8566
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-F60 -- C/2009 F5
434San Benedetto Po Obs. in Italy, 2 in MPEC 2009-F59 -- 137925, 4179
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2009-F59 & 2009-F60 -- C/2009 F5, 2009 EO2, 4954
B40Skylive Obs. in Italy, 1 in MPEC 2009-F59 -- 2009 FD
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2009-F59 -- 2009 FD, 2005 SG19, 189008, 141432
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2009-F59 -- 2009 FP, 2009 FG, 2009 FF, 2009 EK1, 2009 EG3, 2009 DS10, 2009 BC58
611Starkenburg Obs. in Germany, 1 in MPEC 2009-F59 -- 2009 FA
673Table Mtn. Obs. in southern California, 1 in MPEC 2009-F60 -- C/2009 F5
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 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 FZ10JPL Sentry15202082-210874.0e-08-7.85-8.080JPL: "Analysis based on 27 observations spanning .60792 days (2009-Mar-21.32461 to 2009-Mar-21.93253)." Diameter approximately 0.027 km. from mean, weighted H=25.5.
2009 FY10NEODyS15202012-2088392.61e-09-5.15-5.460NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2009/03/21.224 to 2009/03/21.830."
2009 FS4NEODyS1520207917.18e-10-9.35-9.350NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2009/03/18.949 to 2009/03/21.818."
JPL Sentry1520R E M O V E DJPL: Risk listing removed at 0851 UTC.
2009 FG1JPL Sentry15202038-206132.9e-08-3.51-3.570JPL: "Analysis based on 36 observations spanning 4.6235 days (2009-Mar-17.30415 to 2009-Mar-21.92763)." Diameter approximately 0.760 km. from mean, weighted H=18.2.
NEODyS15202038-208163.3e-08-3.45-3.520NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2009/03/17.305 to 2009/03/21.928."
2009 FPJPL Sentry1520R E M O V E DJPL: Risk listing removed at 0852 UTC.
2009 FGJPL Sentry15202022-2107307.5e-06-5.55-6.250JPL: "Analysis based on 48 observations spanning 4.9675 days (2009-Mar-16.3986 to 2009-Mar-21.36612)." Diameter approximately 0.027 km. from mean, weighted H=25.5.
NEODyS15202022-2090235.42e-06-5.65-6.270NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2009/03/16.399 to 2009/03/21.367."

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 22 March '09

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

2140Grabbed MPEC 2009-F61 - 2007 LA15 - see above
1721Grabbed MPEC 2009-F60 - Comet C/2009 F5 (McNaught) - see above
1520Noted that JPL Sentry has updated its 2009 FG risk assessment - see above
Noted that NEODyS has updated its 2009 FG risk assessment - see above
Noted that JPL Sentry has updated its 2009 FG1 risk assessment - see above
Noted that NEODyS has updated its 2009 FG1 risk assessment - see above
Noted that JPL Sentry has removed 2009 FP as an impact risk - see above
Noted that JPL Sentry has removed 2009 FS4 as an impact risk - see above
Noted that NEODyS has posted 2009 FS4 as an impact risk - see above
Noted that NEODyS has posted 2009 FY10 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 FZ10 risk assessment - see above
Grabbed MPEC 2009-F59 - Daily Orbit Update - see above