Contents  on 19 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 19 March '09

The MPC's NEO Confirmation Page has 16 listings: 2 new, 14 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and fourteen updated listings. Of these, eight were "one nighters." So far The Tracking News has counted a total of eighteen 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 19 March '09

Minor Planet Electronic Circulars

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


MPEC 2009-F34 - "15:37 UT" - Comet C/2009 F1 (Larson)


<< DOU on 19 Mar. '09 >>  MPEC 2009-F33 - "06:10 UT" - Daily Orbit Update

Observers  on 19 March '09

A total of 37 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 9 in MPECs 2009-F33 & 2009-F34 -- 2009 FP, 2009 FH, C/2009 F1, 2009 EP2, 2009 DF1, 2009 DD1, 2009 CR2, 2005 UH3, 1999 YR14
A81Balzaretto Obs. in Italy, 1 in MPEC 2009-F33 -- 2009 EP2
493Calar Alto Obs. in Spain, 2 in MPECs 2009-F33 & 2009-F34 -- 2009 FK, C/2009 F1
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2009-F33 -- 2009 EC1, 85953
924Cegep de Trois-Rivieres Obs. in Quebec, 4 in MPEC 2009-F33 -- 2009 FJ, 2009 EP2, 2006 WZ2, 2004 EU9
970Chelmsford Obs. in England, 1 in MPEC 2009-F33 -- 2009 DO111
B84Cyclops Obs. in The Netherlands, 1 in MPEC 2009-F33 -- 2009 DO111
448Desert Moon Obs. in New Mexico, 5 in MPECs 2009-F33 & 2009-F34 -- C/2009 F1, 2009 EZ, 2009 DM1, 2009 CU1, 144861
J27El Guijo Obs. in Spain, 3 in MPEC 2009-F33 -- 2009 FA, 2009 EP2, 2009 DO111
143Gnosca Obs. in Switzerland, 1 in MPEC 2009-F33 -- 2009 FP
J95Great Shefford Obs. in England, 6 in MPECs 2009-F33 & 2009-F34 -- 2009 FR, 2009 FL, 2009 FK, C/2009 F1, 2009 EN2, 2009 DO111
A17Guidestar Obs. in Germany, 2 in MPEC 2009-F33 -- 2009 FG1, 2009 DO111
240Herrenberg Obs. in Germany, 1 in MPEC 2009-F33 -- 141531
704LINEAR in New Mexico, 17 in MPEC 2009-F33 -- 2009 FJ1, 2009 FG1, 2009 EP2, 2009 ED1, 2009 CZ2, 2009 CR4, 2006 SD6, 2002 VY94, 99935, 90367, 38086, 22771, 22753, 20460, 203217, 162080, 155336
J87La Canada Obs. in Spain, 1 in MPEC 2009-F34 -- C/2009 F1
B33Libbiano Obs. in Italy, 1 in MPEC 2009-F34 -- C/2009 F1
D35Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2009-F33 -- 208023
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2009-F34 -- C/2009 F1
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2009-F33 & 2009-F34 -- 2009 FG, C/2009 F1, 2009 EF3, 2007 BG29, 2005 CW25, 2002 RB126
A13Naef Obs. in Switzerland, 4 in MPEC 2009-F33 -- 2009 FA, 2008 UV91, 68350, 207970
A24New Millennium Obs. in Italy, 8 in MPEC 2009-F33 -- 2006 WZ2, 36284, 206359, 203217, 137925, 4179, 3554, 1863
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2009-F33 -- 2009 FA, 2009 DO111, 2009 BA71, 2006 BC10, 2002 VY94
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-F34 -- C/2009 F1
J41Raheny Obs. in Ireland, 1 in MPEC 2009-F34 -- C/2009 F1
661Rothney Astrophysical Obs. in Alberta, 1 in MPEC 2009-F33 -- 2009 FH
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-F34 -- C/2009 F1
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2009-F34 -- C/2009 F1
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-F34 -- C/2009 F1
204Schiaparelli Obs. in Italy, 1 in MPEC 2009-F34 -- C/2009 F1
E12Siding Spring Survey (SSS) in New South Wales, 5 in MPEC 2009-F33 -- 2009 FH, 2009 DR36, 2009 DN45, 2004 LE, 153243
510Siegen Obs. in Germany, 2 in MPEC 2009-F33 -- 2009 FA, 2009 DO111
071Smolyan Obs. in Bulgaria, 1 in MPEC 2009-F33 -- 2004 EU9
691Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2009-F33 -- 2009 FE, 2007 EM88, 2007 BF72, 2006 EV52, 2004 FU64, 39557, 6050
291Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2009-F33 & 2009-F34 -- 2009 FS, 2009 FG, C/2009 F1, 2009 EV, 2009 EF3, 2009 DT10, 2009 DO1, 2009 DA45, 2009 DA43, 2006 JU, 2005 AN26, 2003 SJ84
673Table Mtn. Obs. in southern California, 1 in MPEC 2009-F34 -- C/2009 F1
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-F33 -- 2009 DO111
B18Terskol Obs. in Russia, 1 in MPEC 2009-F34 -- C/2009 F1
0122Thierry Pauwels via Uccle Obs. in Belgium, 2 in MPEC 2009-F33 -- 2009 FA, 2009 EC1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 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 FG1JPL Sentry14562015-2103253.0e-08-3.32-3.730JPL: "Analysis based on 25 observations spanning 1.5415 days (2009-Mar-17.30415 to 2009-Mar-18.84569)." Diameter approximately 0.802 km. from mean, weighted H=18.1.
NEODyS14562015-2090182.33e-08-3.35-3.720NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2009/03/17.305 to 2009/03/18.846."
2009 FSNEODyS1456209016.06e-09-8.04-8.040NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2009/03/17.257 to 2009/03/19.153."
JPL Sentry1456R E M O V E DJPL: Risk listing removed at 1031 UTC.
2009 FPJPL Sentry14562092-209525.5e-10-8.42-8.610JPL: "Analysis based on 22 observations spanning .91976 days (2009-Mar-17.26958 to 2009-Mar-18.18934)." Diameter approximately 0.090 km. from mean, weighted H=22.9.
2009 FKJPL Sentry1456R E M O V E DJPL: Risk listing removed at 0856 UTC.
2009 FJJPL Sentry14562058-2107121.1e-05-4.89-4.960JPL: "Analysis based on 47 observations spanning .89496 days (2009-Mar-17.24376 to 2009-Mar-18.13872)." Diameter approximately 0.039 km. from mean, weighted H=24.7.
NEODyS14562058-208441.12e-05-4.88-4.920NEODyS: "Based on 51 optical observations (of which 4 are rejected as outliers) from 2009/03/17.245 to 2009/03/18.139."
2009 FGJPL Sentry14562049-2107307.1e-06-5.55-6.300JPL: "Analysis based on 42 observations spanning 1.9182 days (2009-Mar-16.3986 to 2009-Mar-18.31679)." Diameter approximately 0.027 km. from mean, weighted H=25.5.
NEODyS14562022-2090286.13e-06-5.58-6.310NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2009/03/16.399 to 2009/03/18.318."
2009 FEJPL Sentry14562022-2103251.8e-06-3.94-4.020JPL: "Analysis based on 33 observations spanning 2.0592 days (2009-Mar-16.27919 to 2009-Mar-18.33835)." Diameter approximately 0.181 km. from mean, weighted H=21.4.
NEODyS14562022-2083101.39e-06-4.04-4.050NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2009/03/16.280 to 2009/03/18.339."
2009 EN2JPL Sentry1456R E M O V E DJPL: Risk listing removed at 1151 UTC.
NEODyS1456R E M O V E D-
2009 DO111JPL Sentry23582077-210875.2e-05-3.64-3.650JPL #2 for the day: "Analysis based on 139 observations spanning 24.825 days (2009-Feb-22.33494 to 2009-Mar-19.160417)." Diameter approximately 0.089 km. from mean, weighted H=22.9.
NEODyS1456R 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 19 March '09

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

2358Noted that JPL Sentry has updated its 2009 DO111 risk assessment - see above
1630Grabbed MPEC 2009-F34 - Comet C/2009 F1 (Larson) - see above
1456Noted that JPL Sentry has updated its 2009 DO111 risk assessment - see above
Noted that NEODyS has removed 2009 DO111 as an impact risk - see above
Noted that JPL Sentry has removed 2009 EN2 as an impact risk - see above
Noted that NEODyS has removed 2009 EN2 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 FE risk assessment - see above
Noted that NEODyS has updated its 2009 FE risk assessment - see above
Noted 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 posted 2009 FG1 as an impact risk - 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
Noted that JPL Sentry has removed 2009 FK as an impact risk - see above
Noted that JPL Sentry has updated its 2009 FP risk assessment - see above
Noted that JPL Sentry has removed 2009 FS as an impact risk - see above
Noted that NEODyS has posted 2009 FS as an impact risk - see above
Grabbed MPEC 2009-F33 - Daily Orbit Update - see above