Contents  on 20 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 20 June '09

The MPC's NEO Confirmation Page has 8 listings: 2 new, 6 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and six updated listings. Of these, six 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 20 June '09

Minor Planet Electronic Circulars

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

<< DOU on 20 June '09 >>  MPEC 2009-M15 - "06:06 UT" - Daily Orbit Update

Observers  on 20 June '09

Six observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 14 in MPEC 2009-M15 -- 2009 MA, 2009 LW2, 2009 LV2, 2009 LS, 2009 KJ22, 2009 KD5, 2009 KC7, 2009 JG1, 2009 HB82, 2007 LL, 2004 XP164, 2001 HY7, 2000 OB22, 52381
J28Jaen Obs. in Spain, 1 in MPEC 2009-M15 -- 16834
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2009-M15 -- 2009 MA, 2009 KL2, 2002 LV, 2002 LT38, 2000 OB22, 162181
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-M15 -- 5869
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2009-M15 -- 2009 LW2, 2009 LS, 2009 KT4, 2009 KT21, 2009 KK8, 2004 LC2
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-M15 -- 2009 MA
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 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 KK8NEODyS1606R E M O V E D-
JPL Sentry1606R 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.

Chronology  on 20 June '09

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

1606Noted that JPL Sentry has removed 2009 KK8 as an impact risk - see above
Noted that NEODyS has removed 2009 KK8 as an impact risk - see above
Grabbed MPEC 2009-M15 - Daily Orbit Update - see above