Contents  on 29 November '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 29 November '09

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

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of four 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 at Suno Observatory by Birtwhistle et al.

New MPECs  on 29 November '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-W137 - "17:25 UT" - 2003 BU35


<< DOU on 29 Nov. '09 >>  MPEC 2009-W136 - "07:13 UT" - Daily Orbit Update

Observers  on 29 November '09

Sixteen observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 4 in MPEC 2009-W136 -- 2009 WZ104, 2009 WM105, 2009 WC26, 2009 WA105
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 18 in MPEC 2009-W136 -- 2009 WZ7, 2009 WZ104, 2009 WX51, 2009 WV25, 2009 WR25, 2009 WP25, 2009 WP106, 2009 WN25, 2009 WL1, 2009 WH106, 2009 WG104, 2009 WF, 2009 WC11, 2009 WB105, 2009 WA, 2009 UP5, 2009 SM103, 2009 RN
703Catalina Sky Survey in Arizona, 1 in MPEC 2009-W137 -- 2003 BU35
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2009-W136 -- 2009 WX51
448Desert Moon Obs. in New Mexico, 3 in MPEC 2009-W136 -- 2009 WH104, 2009 UK28, 2009 ST103
J95Great Shefford Obs. in England, 1 in MPEC 2009-W136 -- 2009 WV25
932McCarthy Obs. in Connecticut, 15 in MPEC 2009-W136 -- 2009 WZ104, 2009 WX51, 2009 WV25, 2009 WN25, 2009 WD106, 2009 WB105, 2009 WA105, 2009 ST19, 2006 UR, 2002 WP, 2002 AF3, 2001 WW1, 2000 CO101, 1998 HJ3, 10115
213Montcabre Obs. in Spain, 1 in MPEC 2009-W136 -- 4015
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2009-W136 & 2009-W137 -- 2009 WG54, 2003 GA, 2003 BU35
A13Naef Obs. in Switzerland, 2 in MPEC 2009-W136 -- 2009 WL1, 2009 WF
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2009-W136 -- 2009 WV25, 2009 WF, 2009 RN, 2009 QD34, 2009 NA, 2009 MX6, 2006 UR
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-W136 -- 2009 WN25
939Rodeno Obs. in Spain, 1 in MPEC 2009-W136 -- 4015
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2009-W136 -- 2009 WR52, 2009 WQ25, 2009 VA26
926Tenagra II Obs. in Arizona, 2 in MPEC 2009-W136 -- 2009 WP106, 2009 WB105
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-W136 -- 2009 RN
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 November '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: JPL at 2358 and NEODyS at 2359 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 WR52NEODyS16552031-2090367.84e-05-5.87-6.000NEODyS: "Based on 24 optical observations (of which 2 are rejected as outliers) from 2009/11/23.220 to 2009/11/27.153."
JPL Sentry16542031-2109621.1e-04-5.76-5.940JPL: "Analysis based on 23 observations spanning 3.9327 days (2009-Nov-23.21917 to 2009-Nov-27.15186)." Diameter approximately 0.007 km. from mean, weighted H=28.3.
2009 WX51NEODyS1655204813.25e-10-6.84-6.840NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2009/11/22.250 to 2009/11/29.243."
JPL Sentry16542048-208231.0e-09-6.50-6.640JPL: "Analysis based on 44 observations spanning 6.9933 days (2009-Nov-22.24934 to 2009-Nov-29.24263)." Diameter approximately 0.322 km. from mean, weighted H=20.1.
2009 WQ25JPL Sentry16542051-209427.7e-08-6.61-6.740JPL: "Analysis based on 28 observations spanning 5.9572 days (2009-Nov-21.16281 to 2009-Nov-27.11998)." Diameter approximately 0.055 km. from mean, weighted H=23.9.
NEODyS1654205113.24e-11-9.67-9.670NEODyS: "Based on 29 optical observations (of which 1 are rejected as outliers) from 2009/11/21.164 to 2009/11/27.121."

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 29 November '09

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

1831Grabbed MPEC 2009-W137 - 2003 BU35 - see above
1655Noted that NEODyS has updated its 2009 WR52 risk assessment - see above
Noted that NEODyS has updated its 2009 WX51 risk assessment - see above
Grabbed MPEC 2009-W136 - Daily Orbit Update - see above
1654Noted that JPL Sentry has updated its 2009 WQ25 risk assessment - see above
Noted that NEODyS has updated its 2009 WQ25 risk assessment - see above
Noted that JPL Sentry has updated its 2009 WR52 risk assessment - see above
Noted that JPL Sentry has updated its 2009 WX51 risk assessment - see above