Contents  on 15 June '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 15 June '09

The MPC's NEO Confirmation Page has 5 listings: 2 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and three updated listings. All of these were "one nighters." So far The Tracking News has counted a total of seven 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 15 June '09

Minor Planet Electronic Circulars

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

MPEC 2009-L47 - "12:37 UT" - 2009 LQ1

<< DOU on 15 June '09 >>  MPEC 2009-L46 - "06:06 UT" - Daily Orbit Update

Observers  on 15 June '09

Twelve observing facilities appear in today's MPECs.

CodeObserver / observatory
A88Bolzaneto Obs. in Italy, 1 in MPEC 2009-L46 -- 5620
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2009-L46 & 2009-L47 -- 2009 LQ1, 2009 KV2, 2005 MO13, 2004 LC2, 2002 LS32, 194386
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2009-L46 -- 5620
A17Guidestar Obs. in Germany, 1 in MPEC 2009-L46 -- 2009 LS
E17Leura Obs. in New South Wales, 1 in MPEC 2009-L46 -- 138911
932McCarthy Obs. in Connecticut, 1 in MPEC 2009-L46 -- 2009 LQ
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2009-L46 & 2009-L47 -- 2009 LQ1, 85774
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2009-L46 -- 2009 LS, 2009 KY1, 2009 KM7, 2009 JR5, 2009 AV
147Suno Obs. in Italy, 1 in MPEC 2009-L46 -- 2009 LS
A16Tentlingen Obs. in Switzerland, 1 in MPEC 2009-L46 -- 2002 LT38
D25Tzec Maun Obs. Pingelly in Western Australia, 1 in MPEC 2009-L46 -- 4954
H78Univ. of Narino Obs. in Colombia, 1 in MPEC 2009-L46 -- 143651
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 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.





Notes for Today's Latest Risk Assessments
2009 LQ1JPL Sentry16022010-21041415.8e-06-3.82-4.390JPL: "Analysis based on 16 observations spanning 1.0399 days (2009-Jun-14.20093 to 2009-Jun-15.24083)." Diameter approximately 0.113 km. from mean, weighted H=22.3.
2009 LSJPL Sentry13242017-2107241.9e-08-3.55-4.100JPL: "Analysis based on 57 observations spanning 1.8776 days (2009-Jun-12.39072 to 2009-Jun-14.26836)." Diameter approximately 1.100 km. from mean, weighted H=17.5.
NEODyS13242017-2085243.22e-08-3.33-3.720NEODyS: "Based on 57 optical observations (of which 0 are rejected as outliers) from 2009/06/12.391 to 2009/06/14.269."

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 15 June '09

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

1602Noted that JPL Sentry has posted 2009 LQ1 as an impact risk - see above
1324Noted that JPL Sentry has updated its 2009 LS risk assessment - see above
Noted that NEODyS has updated its 2009 LS risk assessment - see above
Grabbed MPEC 2009-L46 - Daily Orbit Update - see above
Grabbed MPEC 2009-L47 - 2009 LQ1 - see above