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Contents  on 18 June '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.

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Radar Astrometry  on 18 June '09

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 2009 UTC when the database was dated 18 June

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NEOCP Activity  on 18 June '09

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

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and one updated listing. Both of these were "one nighters." So far The Tracking News has counted a total of five listings on the NEOCP at some point today.

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New MPECs  on 18 June '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.


MPEC 2009-M13 - "14:32 UT" - Comet P/2009 L2 (Yang-Gao)


MPEC 2009-M12 - "11:40 UT" - 2009 MD


<< DOU on 18 June '09 >>  MPEC 2009-M11 - "06:06 UT" - Daily Orbit Update

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Observers  on 18 June '09

A total of 39 observing facilities appear in today's MPECs.

CodeObserver / observatory
J10Alicante Obs. in Spain, 1 in MPEC 2009-M13 -- P/2009 L2
251Arecibo in Puerto Rico, 1 in radar -- 136617
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2009-M12 -- 2009 MD
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2009-M13 -- P/2009 L2
B96Brixiis Obs. in Belgium, 1 in MPEC 2009-M13 -- P/2009 L2
B66Casasco Obs. in Italy, 1 in MPEC 2009-M13 -- P/2009 L2
A77Chante-Perdrix Obs. in France, 1 in MPEC 2009-M13 -- P/2009 L2
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2009-M13 -- P/2009 L2
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 1 in MPEC 2009-M12 -- 2009 MD
F659Marco Micheli in Hawaii via Faulkes Telescope North in Hawaii, 1 in MPEC 2009-M11 -- 2009 KK
B23Fiamene Obs. in Italy, 3 in MPEC 2009-M11 -- 2009 JK1, 2002 LV, 85989
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 136617
J95Great Shefford Obs. in England, 3 in MPECs 2009-M11 & 2009-M12 -- 2009 MD, 2009 MA, 2009 LQ
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2009-M13 -- P/2009 L2
A17Guidestar Obs. in Germany, 1 in MPEC 2009-M11 -- 2005 MR5
560Madonna di Dossobuono Obs. in Italy, 4 in MPEC 2009-M11 -- 2009 MA, 2009 LS, 2006 HR29, 2000 OB22
B82Maidbronn Obs. in Germany, 1 in MPEC 2009-M13 -- P/2009 L2
932McCarthy Obs. in Connecticut, 2 in MPEC 2009-M11 -- 2009 LQ, 2009 KD5
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2009-M11 -- 2009 JK1, 2009 BL2
213Montcabre Obs. in Spain, 1 in MPEC 2009-M13 -- P/2009 L2
900Moriyama Obs. in Japan, 1 in MPEC 2009-M13 -- P/2009 L2
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2009-M11 & 2009-M12 -- 2009 MD, 2009 MA, 1998 MR24, 99799
A13Naef Obs. in Switzerland, 1 in MPEC 2009-M13 -- P/2009 L2
J47Nazaret Obs. in Spain, 1 in MPEC 2009-M13 -- P/2009 L2
B49Paus Obs. in Spain, 1 in MPEC 2009-M13 -- P/2009 L2
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPECs 2009-M11 & 2009-M13 -- 2009 MA, P/2009 L2
561Piszkesteto Sta. in Hungary, 1 in MPEC 2009-M11 -- 11500
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-M13 -- P/2009 L2
D90RAS Obs. Moorook in South Australia, 1 in MPEC 2009-M13 -- P/2009 L2
J07SPAG Monfrague Obs. in Spain, 1 in MPEC 2009-M13 -- P/2009 L2
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2009-M13 -- P/2009 L2
E12Siding Spring Survey (SSS) in New South Wales, 6 in MPEC 2009-M11 -- 2009 LX, 2009 KV21, 2009 KN4, 2009 KE3, 2009 KC3, 207945
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2009-M11 -- 2009 LW2, 2009 LS
A71Stixendorf Obs. in Austria, 1 in MPEC 2009-M13 -- P/2009 L2
673Table Mtn. Obs. in southern California, 1 in MPEC 2009-M13 -- P/2009 L2
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-M11 -- 2009 LQ
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-M13 -- P/2009 L2
D25Tzec Maun Obs. Pingelly in Western Australia, 1 in MPEC 2009-M13 -- P/2009 L2
H47Vicksburg Obs. in Mississippi, 3 in MPECs 2009-M11 & 2009-M13 -- P/2009 L2, 5620, 4015
367Yatsuka Obs. in Japan, 1 in MPEC 2009-M13 -- P/2009 L2
J08Zonalunar Obs. in Spain, 1 in MPEC 2009-M13 -- P/2009 L2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

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Impact Risk Monitoring  on 18 June '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.
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 LW2JPL Sentry14012034-210867.4e-08-4.06-4.090JPL: "Analysis based on 10 observations spanning 1.8984 days (2009-Jun-15.44034 to 2009-Jun-17.33874)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
NEODyS14012041-208731.32e-08-5.23-5.280NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2009/06/15.441 to 2009/06/17.340."
2009 LXNEODyS1401R E M O V E D-
JPL Sentry1401R E M O V E DJPL: Risk listing removed at 0849 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.

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Chronology  on 18 June '09

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

2009Noted Radar Astrometry database update - see above
1501Grabbed MPEC 2009-M13 - Comet P/2009 L2 (Yang-Gao) - see above
1401Noted that JPL Sentry has updated its 2009 LW2 risk assessment - see above
Noted that NEODyS has updated its 2009 LW2 risk assessment - see above
Noted that JPL Sentry has removed 2009 LX as an impact risk - see above
Noted that NEODyS has removed 2009 LX as an impact risk - see above
Grabbed MPEC 2009-M11 - Daily Orbit Update - see above
Grabbed MPEC 2009-M12 - 2009 MD - see above