Contents  on 11 September '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 11 September '09

The MPC's NEO Confirmation Page has 2 listings: 2 new

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new listings. Of these, one was a "one nighter." So far The Tracking News has counted a total of six 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 11 September '09

Minor Planet Electronic Circulars

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

MPEC 2009-R40 - "19:33 UT" - Comet P/1783 W1 = 2003 A1 = 2009 R2 (Pigott-LINEAR-Kowalski)

MPEC 2009-R39 - "17:11 UT" - 2009 RR

MPEC 2009-R38 - "11:26 UT" - 2009 RN

MPEC 2009-R37 - "11:22 UT" - 2009 RO

MPEC 2009-R36 - "11:18 UT" - 2009 RM

<< DOU on 11 Sept. '09 >>  MPEC 2009-R35 - "06:07 UT" - Daily Orbit Update

Observers  on 11 September '09

Eighteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 12 in MPECs 2009-R35, 2009-R36, 2009-R38 & 2009-R39 -- 2009 RR, 2009 RN, 2009 RM, 2009 QZ34, 2009 QT, 2009 QO5, 2009 QM5, 2009 QL8, 2009 QC36, 2009 QA35, 2009 OS5, 2009 LX
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2009-R35 -- 2009 MC9
B88Bigmuskie Obs. in Italy, 1 in MPEC 2009-R35 -- 7822
432Boambee Obs. in New South Wales, 4 in MPEC 2009-R35 -- 2000 CO101, 217390, 5620, 1863
160Castelmartini Obs. in Italy, 6 in MPEC 2009-R35 -- 2009 QE8, 2009 OC, 2009 NE, 2009 NA, 2009 ML1, 2009 KC3
703Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2009-R35, 2009-R37, 2009-R39 & 2009-R40 -- 2009 RR, 2009 RO, P/2009 R2, 2004 RK9, 2002 CF26, 216985, 17511, 162566, 152664, 11066, 5786
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 4 in MPECs 2009-R35, 2009-R36 & 2009-R38 -- 2009 RN, 2009 RM, 2009 LX, 152664
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2009-R36 -- 2009 RM
I21El Condor Obs. in Argentina, 1 in MPEC 2009-R35 -- 2009 QJ9
J95Great Shefford Obs. in England, 2 in MPECs 2009-R38 & 2009-R40 -- 2009 RN, P/2009 R2
J75La Sagra Obs. in Spain, 2 in MPECs 2009-R35 & 2009-R38 -- 2009 RN, 5786
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-R40 -- P/2009 R2
D90`K. Hills via RAS Obs. Moorook in South Australia, 1 in MPEC 2009-R35 -- 152664
I20Rio Cuarto Obs. in Argentina, 3 in MPECs 2009-R35 & 2009-R36 -- 2009 RM, 2009 QQ8, 2009 QC
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2009-R37, 2009-R38 & 2009-R39 -- 2009 RR, 2009 RO, 2009 RN
H36Sandlot Obs. in Kansas, 2 in MPECs 2009-R38 & 2009-R40 -- 2009 RN, P/2009 R2
E12Siding Spring Survey (SSS) in New South Wales, 11 in MPECs 2009-R35 & 2009-R36 -- 2009 RM, 2009 QO8, 2009 QJ9, 2009 MC9, 2004 RU10, 2001 HA4, 87684, 217807, 214088, 5645, 5620
I19Tanti Obs. in Argentina, 3 in MPECs 2009-R35 & 2009-R36 -- 2009 RM, 2009 FU4, 159402
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 September '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 RRJPL Sentry20022020-21071219.7e-06-5.37-6.370JPL: "Analysis based on 14 observations spanning .15456 days (2009-Sep-11.18242 to 2009-Sep-11.33698)." Diameter approximately 0.027 km. from mean, weighted H=25.5.
2009 RNJPL Sentry13282015-2103325.3e-08-4.36-4.560JPL: "Analysis based on 23 observations spanning .41782 days (2009-Sep-11.00009 to 2009-Sep-11.41791)." Diameter approximately 0.369 km. from mean, weighted H=19.8.

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 11 September '09

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

2300Noted that the NEOCP has become active
2149Grabbed MPEC 2009-R40 - Comet P/1783 W1 = 2003 A1 = 2009 R2 (Pigott-LINEAR-Kowalski) - see above
Noted that the NEOCP has become empty
2002Noted that JPL Sentry has posted 2009 RR as an impact risk - see above
1901Grabbed MPEC 2009-R39 - 2009 RR - see above
1328Noted that JPL Sentry has posted 2009 RN as an impact risk - see above
Grabbed MPEC 2009-R35 - Daily Orbit Update - see above
Grabbed MPEC 2009-R36 - 2009 RM - see above
Grabbed MPEC 2009-R37 - 2009 RO - see above
Grabbed MPEC 2009-R38 - 2009 RN - see above