Contents  on 12 October '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 12 October '09

The MPC's NEO Confirmation Page has 3 listings: 1 new, 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and two updated listings. Of these, two were "one nighters."

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 12 October '09

Minor Planet Electronic Circulars

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

<< DOU on 12 Oct. '09 >>  MPEC 2009-T38 - "06:08 UT" - Daily Orbit Update

Observers  on 12 October '09

Thirteen observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 2 in MPEC 2009-T38 -- 2009 SM104, 2009 SM103
160Castelmartini Obs. in Italy, 7 in MPEC 2009-T38 -- 2009 SM103, 2002 NP1, 2000 CO101, 54401, 217796, 162181, 3988
J27El Guijo Obs. in Spain, 2 in MPEC 2009-T38 -- 2009 ML1, 2009 KC3
J95Great Shefford Obs. in England, 4 in MPEC 2009-T38 -- 2009 TU, 2009 TT, 2009 TS, 2009 TQ
379Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2009-T38 -- 2009 ST19, 2009 KC3, 2005 RQ6, 2000 CO101, 3200
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2009-T38 -- 2009 TT
474Mt. John Obs. in New Zealand, 6 in MPEC 2009-T38 -- 2009 TK, 2009 SS171, 2009 SQ104, 2009 SK1, 2009 QQ8, 2002 XX4
J93Mt. Tuffley Obs. in England, 2 in MPEC 2009-T38 -- 159402, 433
423North Ryde Obs. in New South Wales, 1 in MPEC 2009-T38 -- 3753
B49Paus Obs. in Spain, 2 in MPEC 2009-T38 -- 2009 ST19, 2009 KC3
587Sormano Obs. in Italy, 5 in MPEC 2009-T38 -- 2009 TU, 2009 TT, 2009 TS, 2009 TP, 2009 TK
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2009-T38 -- 2009 TU, 2009 SQ104
926Tenagra II Obs. in Arizona, 5 in MPEC 2009-T38 -- 2009 SX1, 2009 SW17, 2009 SV171, 2009 SF2, 2009 QZ34
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 October '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.





Notes for Today's Latest Risk Assessments
2009 TUJPL Sentry16012086-209552.5e-05-5.79-6.240JPL: "Analysis based on 34 observations spanning 1.9889 days (2009-Oct-10.18978 to 2009-Oct-12.17871)." Diameter approximately 0.012 km. from mean, weighted H=27.3.
NEODyS16012084-208642.36e-05-5.81-6.250NEODyS: "Based on 35 optical observations (of which 1 are rejected as outliers) from 2009/10/10.191 to 2009/10/12.179."
2009 TTNEODyS1601R E M O V E D-
JPL Sentry1601R E M O V E DJPL: Risk listing removed at 0850 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 12 October '09

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

1601Noted that JPL Sentry has removed 2009 TT as an impact risk - see above
Noted that NEODyS has removed 2009 TT as an impact risk - see above
Noted that JPL Sentry has updated its 2009 TU risk assessment - see above
Noted that NEODyS has updated its 2009 TU risk assessment - see above
Grabbed MPEC 2009-T38 - Daily Orbit Update - see above