Contents  on 28 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 28 June '09

The MPC's NEO Confirmation Page has 7 listings: 3 new, 4 updated

When last checked at 2226 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and four updated listings. Of these, three were "one nighters."

New MPECs  on 28 June '09

Minor Planet Electronic Circulars

There were two MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-M45 - "22:41 UT" - 2007 SV11

<< DOU on 28 June '09 >>  MPEC 2009-M44 - "06:06 UT" - Daily Orbit Update

Observers  on 28 June '09

Eight observing facilities appeared in this day's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 2 in MPEC 2009-M44 -- 2009 MX, 2009 MD
B19Iluro Obs. in Spain, 3 in MPEC 2009-M44 -- 15745, 154244, 138883
J28Jaen Obs. in Spain, 2 in MPEC 2009-M44 -- 2007 LL, 16834
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2009-M44 & 2009-M45 -- 2009 LU2, 2007 SV11
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2009-M44 -- 2009 ML1
A13Naef Obs. in Switzerland, 2 in MPEC 2009-M44 -- 2005 MR5, 2001 HY7
H53Thompsonville Obs. in Illinois, 2 in MPEC 2009-M44 -- 212546, 5620
H47Vicksburg Obs. in Mississippi, 2 in MPEC 2009-M44 -- 15745, 4015
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 June '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2226 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 LU2JPL Sentry14572012-2108245.5e-06-3.39-3.660JPL: "Analysis based on 16 observations spanning 12.058 days (2009-Jun-14.20491 to 2009-Jun-26.262609)." Diameter approximately 0.110 km. from mean, weighted H=22.5.
NEODyS14572012-2089335.19e-06-3.35-3.570NEODyS: "Based on 17 optical observations (of which 1 are rejected as outliers) from 2009/06/14.206 to 2009/06/26.263."

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 28 June '09

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

0132 6/29Grabbed MPEC 2009-M45 - 2007 SV11 - see above
1457Noted that JPL Sentry has posted 2009 LU2 as an impact risk - see above
Noted that NEODyS has updated its 2009 LU2 risk assessment - see above
Grabbed MPEC 2009-M44 - Daily Orbit Update - see above