Contents  on 20 February '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 20 February '09

The MPC's NEO Confirmation Page has 5 listings: 5 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five updated listings. All of these were "one nighters." So far The Tracking News has counted a total of twelve objects listed 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 20 February '09

Minor Planet Electronic Circulars

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


MPEC 2009-D40 - "20:47 UT" - 2009 DR3


MPEC 2009-D39 - "19:36 UT" - Comet P/2001 CV8 = 2009 D1 (LINEAR)


MPEC 2009-D38 - "15:47 UT" - 2009 DO1


MPEC 2009-D37 - "15:44 UT" - 2009 DN1


MPEC 2009-D36 - "15:40 UT" - 2009 DM1


MPEC 2009-D35 - "15:37 UT" - 2009 DL1


<< DOU on 20 Feb. '09 >>  MPEC 2009-D34 - "07:07 UT" - Daily Orbit Update

Observers  on 20 February '09

A total of 32 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 5 in MPECs 2009-D35, 2009-D36, 2009-D37, 2009-D38 & 2009-D40 -- 2009 DR3, 2009 DO1, 2009 DN1, 2009 DM1, 2009 DL1
A81Balzaretto Obs. in Italy, 1 in MPEC 2009-D40 -- 2009 DR3
493Calar Alto Obs. in Spain, 7 in MPECs 2009-D34, 2009-D35, 2009-D36, 2009-D37 & 2009-D38 -- 2009 DZ, 2009 DO1, 2009 DN1, 2009 DM1, 2009 DL1, 2009 DF1, 138911
703Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2009-D34, 2009-D36 & 2009-D40 -- 2009 DR3, 2009 DM1, 2009 BD77, 14402, 8566, 5332, 2329
106Crni Vrh Obs. in Slovenia, 4 in MPECs 2009-D34 & 2009-D35 -- 2009 DL1, 2009 CS, 2009 CN5, 206910
448Desert Moon Obs. in New Mexico, 5 in MPEC 2009-D34 -- 2009 CW1, 2009 CR4, 2009 CQ5, 2009 CN5, 2009 AM15
J27El Guijo Obs. in Spain, 4 in MPEC 2009-D34 -- 68350, 162900, 153953, 143651
734Farpoint Obs. in Kansas, 3 in MPECs 2009-D34, 2009-D36 & 2009-D37 -- 2009 DN1, 2009 DM1, 2009 CN5
704LINEAR in New Mexico, 9 in MPECs 2009-D34, 2009-D35 & 2009-D37 -- 2009 DV, 2009 DN1, 2009 DL1, 2009 CS, 2005 SN25, 85867, 206910, 14402, 7088
H12LightBuckets Obs. Mayhill in New Mexico, 1 in MPEC 2009-D34 -- 12711
I36Los Campitos Obs. in Argentina, 2 in MPEC 2009-D34 -- 2009 CS, 164400
130Lumezzane Obs. in Italy, 5 in MPEC 2009-D34 -- 2009 CZ, 2009 CT5, 2008 YE29, 2008 RM98, 200840
560Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2009-D34 -- 2009 CT5, 2009 CQ1, 2009 CO5
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2009-D34, 2009-D35, 2009-D36, 2009-D37, 2009-D38 & 2009-D40 -- 2009 DR3, 2009 DO1, 2009 DN1, 2009 DM1, 2009 DL1, 2009 BF81
J46Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2009-D34 -- 4179
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2009-D34 -- 14402, 141495
A13Naef Obs. in Switzerland, 1 in MPEC 2009-D34 -- 2009 DC1
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2009-D34 -- 2009 CV5, 2009 BD77, 2009 BA71, 2007 BT2, 2004 EU9, 2002 CT11
J53Posadas Obs. in Spain, 1 in MPEC 2009-D34 -- 162900
0841Alexander V. Devyatkin via Pulkovo Obs. in Russia, 1 in MPEC 2009-D34 -- 2008 TC3
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 2 in MPECs 2009-D35 & 2009-D40 -- 2009 DR3, 2009 DL1
H06\B. Conklin via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-D34 -- 2008 EA32
854Sabino Canyon Obs. in Arizona, 6 in MPECs 2009-D34, 2009-D35, 2009-D36, 2009-D37, 2009-D38 & 2009-D40 -- 2009 DW, 2009 DR3, 2009 DO1, 2009 DN1, 2009 DM1, 2009 DL1
H36Sandlot Obs. in Kansas, 2 in MPECs 2009-D35 & 2009-D38 -- 2009 DO1, 2009 DL1
204Schiaparelli Obs. in Italy, 2 in MPECs 2009-D34 & 2009-D35 -- 2009 DL1, 2009 DC1
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2009-D34 -- 2009 CC3, 2009 BE77, 2009 AM15, 2008 SQ7
587Sormano Obs. in Italy, 1 in MPEC 2009-D34 -- 2009 CV5
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2009-D34, 2009-D35 & 2009-D38 -- 2009 DO1, 2009 DL1, 2005 GW119, 1996 BZ3, 206910, 159504
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2009-D34, 2009-D35, 2009-D38 & 2009-D39 -- 2009 DO1, 2009 DL1, P/2009 D1, 2009 CS5, 2009 CR5, 2009 CR4, 2008 CG, 2006 SD6, 2002 HF8, 2001 DR8
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-D35 -- 2009 DL1
6892Hugh C. Harris via U.S. Naval Obs. Flagstaff Station in Arizona, 1 in MPEC 2009-D34 -- 433
A48Verona Obs. in Italy, 2 in MPEC 2009-D34 -- 2008 EE, 2006 WZ2
198Wildberg Obs. in Germany, 1 in MPEC 2009-D34 -- 2009 CV
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 February '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 DM1JPL Sentry18172010-2083763.6e-08-3.19-3.380JPL: "Analysis based on 21 observations spanning .94482 days (2009-Feb-19.11474 to 2009-Feb-20.05956)." Diameter approximately 1.100 km. from mean, weighted H=17.4.
2009 DF1JPL Sentry15282017-2081154.4e-09-5.58-6.310JPL #2 for the day: "Analysis based on 17 observations spanning .54861 days (2009-Feb-19.44059 to 2009-Feb-19.9892)." Diameter approximately 0.301 km. from mean, weighted H=20.3.
NEODyS15282013-2081115.31e-09-5.18-5.580NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2009/02/19.441 to 2009/02/19.990."
2009 DE1NEODyS1528204014.12e-09-7.77-7.770NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2009/02/19.390 to 2009/02/19.943."
JPL Sentry02592038-2106291.1e-07-6.50-7.080JPL: "Analysis based on 19 observations spanning .55238 days (2009-Feb-19.38939 to 2009-Feb-19.94177)." Diameter approximately 0.045 km. from mean, weighted H=24.4.
2009 DA1NEODyS15282028-2079149.0e-09-6.53-6.980NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2009/02/19.064 to 2009/02/19.939."
JPL Sentry01582028-2105435.9e-08-5.72-6.330JPL: "Analysis based on 18 observations spanning .87514 days (2009-Feb-19.06293 to 2009-Feb-19.93807)." Diameter approximately 0.120 km. from mean, weighted H=22.3.
2009 CQ5NEODyS1528R E M O V E D-
JPL Sentry1528R E M O V E DJPL: Risk listing removed at 0951 UTC.
2009 BF81JPL Sentry1528R E M O V E DJPL: Risk listing removed at 0950 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 20 February '09

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

2138Grabbed MPEC 2009-D40 - 2009 DR3 - see above
2031Grabbed MPEC 2009-D39 - Comet P/2001 CV8 = 2009 D1 (LINEAR) - see above
1817Noted that JPL Sentry has posted 2009 DM1 as an impact risk - see above
1628Grabbed MPEC 2009-D35 - 2009 DL1 - see above
Grabbed MPEC 2009-D36 - 2009 DM1 - see above
Grabbed MPEC 2009-D37 - 2009 DN1 - see above
Grabbed MPEC 2009-D38 - 2009 DO1 - see above
1528Noted that JPL Sentry has removed 2009 BF81 as an impact risk - see above
Noted that JPL Sentry has removed 2009 CQ5 as an impact risk - see above
Noted that NEODyS has removed 2009 CQ5 as an impact risk - see above
Noted that NEODyS has posted 2009 DA1 as an impact risk - see above
Noted that NEODyS has posted 2009 DE1 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 DF1 risk assessment - see above
Noted that NEODyS has posted 2009 DF1 as an impact risk - see above
Grabbed MPEC 2009-D34 - Daily Orbit Update - see above
0259Noted that JPL Sentry has posted 2009 DE1 as an impact risk - see above
0158Noted that JPL Sentry has posted 2009 DA1 as an impact risk - see above
Noted that JPL Sentry has posted 2009 DF1 as an impact risk - see above