Contents  on 22 November '09


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 November '09

The MPC's NEO Confirmation Page has 26 listings: 6 new, 20 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six new and 20 updated listings. Of these, seventeen were "one nighters." So far The Tracking News has counted a total of 33 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 22 November '09

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 22 Nov. '09 >>  MPEC 2009-W63 - "07:12 UT" - Daily Orbit Update

Observers  on 22 November '09

A total of 21 observing facilities appear in today's MPEC.

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2009-W63 -- 2009 WN8
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 15 in MPEC 2009-W63 -- 2009 WN, 2009 WL1, 2009 WF, 2009 WD11, 2009 WD, 2009 WC11, 2009 WA, 2009 VZ, 2009 VR25, 2009 VQ44, 2009 UY19, 2009 UQ, 2009 UN, 2009 TB8, 2002 WX12
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2009-W63 -- 2005 RQ6
621Bergisch Gladbach Obs. in Germany, 1 in MPEC 2009-W63 -- 5646
160Castelmartini Obs. in Italy, 5 in MPEC 2009-W63 -- 217683, 162273, 154244, 136617, 6239
703Catalina Sky Survey (CSS) in Arizona, 13 in MPEC 2009-W63 -- 2009 WY7, 2009 WN8, 2009 WN, 2009 SM103, 2009 KC3, 89959, 85804, 22771, 17182, 141052, 8201, 5645, 2212
448Desert Moon Obs. in New Mexico, 3 in MPEC 2009-W63 -- 2009 TB8, 2002 YF4, 155334
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2009-W63 -- 2009 NA
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2009-W63 -- 2005 RQ6
704LINEAR in New Mexico, 8 in MPEC 2009-W63 -- 2009 SM103, 2007 BG29, 2006 AO4, 54401, 207945, 20790, 162004, 152560
J75La Sagra Obs. in Spain, 3 in MPEC 2009-W63 -- 2009 VW, 2009 QD34, 152560
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2009-W63 -- 2009 WN8
932McCarthy Obs. in Connecticut, 4 in MPEC 2009-W63 -- 2009 WY7, 2009 WX6, 2009 WN8, 2009 WL1
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2009-W63 -- 2009 UV18, 2009 TG10, 99248, 152560
H23Pear Tree Obs. in Florida, 1 in MPEC 2009-W63 -- 3200
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2009-W63 -- 4015
204Schiaparelli Obs. in Italy, 4 in MPEC 2009-W63 -- 2009 WK1, 2009 WB, 2009 HD21, 2002 UN3
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-W63 -- 2009 VW
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2009-W63 -- 2009 WM1, 2009 WK6, 2009 WJ1, 2009 VZ25, 2009 QZ34
926Tenagra II Obs. in Arizona, 1 in MPEC 2009-W63 -- 2009 WF7
H53Thompsonville Obs. in Illinois, 5 in MPEC 2009-W63 -- 2009 SM103, 2009 NH, 2008 WB59, 2005 RQ6, 2002 NW16
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 November '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL 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.





Notes for Today's Latest Risk Assessments
2009 WM1NEODyS15452018-2089804.06e-05-1.72-2.140NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2009/11/17.465 to 2009/11/21.490."
JPL Sentry15442018-2106874.9e-05-1.69-2.120JPL: "Analysis based on 33 observations spanning 4.0254 days (2009-Nov-17.4641 to 2009-Nov-21.4895)." Diameter approximately 0.272 km. from mean, weighted H=20.5.
2009 WJ1NEODyS15452057-208037.93e-09-6.27-6.420NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2009/11/17.110 to 2009/11/22.077."
JPL Sentry15442091-210721.2e-09-7.09-7.130JPL: "Analysis based on 34 observations spanning 4.9672 days (2009-Nov-17.10881 to 2009-Nov-22.07604)." Diameter approximately 0.210 km. from mean, weighted H=21.0.
2009 VZ25JPL Sentry1544R E M O V E DJPL: Risk listing removed at 0949 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 22 November '09

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

1545Noted that NEODyS has updated its 2009 WJ1 risk assessment - see above
Noted that NEODyS has updated its 2009 WM1 risk assessment - see above
Grabbed MPEC 2009-W63 - Daily Orbit Update - see above
1544Noted that JPL Sentry has removed 2009 VZ25 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 WJ1 risk assessment - see above
Noted that JPL Sentry has updated its 2009 WM1 risk assessment - see above