Contents  on 9 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 9 October '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."

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 9 October '09

Minor Planet Electronic Circulars

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

<< DOU on 9 Oct. '09 >>  MPEC 2009-T28 - "06:08 UT" - Daily Orbit Update

MPEC 2009-T27 - "02:20 UT" - Comets C/2002 Q8, 2002 S5 (SOHO)

MPEC 2009-T26 - "01:52 UT" - Comets C/1997 S4, 2001 Q7, 2001 Q8, 2002 Q6, 2002 Q9, 2002 R4 (SOHO)

Observers  on 9 October '09

Eleven observing facilities appear in today's MPECs.

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2009-T28 -- 3361
J02Busot Obs., 1 in MPEC 2009-T28 -- 433
160Castelmartini Obs. in Italy, 7 in MPEC 2009-T28 -- 2009 SG2, 2009 SG, 2009 ML1, 2009 MC9, 54401, 17274, 159402
J95Great Shefford Obs. in England, 4 in MPEC 2009-T28 -- 2009 SP171, 2009 SM104, 2009 SL104, 2009 SC229
D21Shenton Park Obs. in Western Australia, 6 in MPEC 2009-T28 -- 2009 TJ, 2009 SW17, 2009 SQ172, 2009 KL2, 159402, 3552
E12Siding Spring Survey (SSS) in New South Wales, 5 in MPEC 2009-T28 -- 2009 TJ, 2009 SG2, 2009 RD4, 2009 QL8, 2009 HD21
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 8 in MPECs 2009-T26 & 2009-T27 -- C/2002 S5, C/2002 R4, C/2002 Q9, C/2002 Q8, C/2002 Q6, C/2001 Q8, C/2001 Q7, C/1997 S4
926Tenagra II Obs. in Arizona, 4 in MPEC 2009-T28 -- 2009 SW17, 2009 SO103, 2009 SG18, 2009 FG19
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-T28 -- 159402
D25Tzec Maun Obs. Pingelly in Western Australia, 1 in MPEC 2009-T28 -- 159402
A92Urseanu Obs. in Romania, 1 in MPEC 2009-T28 -- 17274
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 October '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.





Notes for Today's Latest Risk Assessments
2009 TJNEODyS1407R E M O V E D-
JPL Sentry1407R 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 9 October '09

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

1407Noted that JPL Sentry has removed 2009 TJ as an impact risk - see above
Noted that NEODyS has removed 2009 TJ as an impact risk - see above
Grabbed MPEC 2009-T28 - Daily Orbit Update - see above
Noted that the NEOCP has become active
0440Grabbed MPEC 2009-T27 - Comets C/2002 Q8, 2002 S5 (SOHO) - see above
0209Grabbed MPEC 2009-T26 - Comets C/1997 S4, 2001 Q7, 2001 Q8, 2002 Q6, 2002 Q9, 2002 R4 (SOHO) - see above