Contents  on 26 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 26 June '09

The MPC's NEO Confirmation Page has 3 listings: 1 new, 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and two updated listings. All of these were "one nighters." So far The Tracking News has counted a total of four 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 26 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-M40 - "18:43 UT" - 2009 MZ6

MPEC 2009-M39 - "18:35 UT" - 2005 VB7

<< DOU on 26 June '09 >>  MPEC 2009-M38 - "16:18 UT" - Daily Orbit Update

Observers  on 26 June '09

Twelve observing facilities appear in today's MPECs.

CodeObserver / observatory
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2009-M38 -- 5620
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2009-M40 -- 2009 MZ6
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 5 in MPECs 2009-M38 & 2009-M40 -- 2009 MZ6, 2009 MA, 2002 UX, 2002 LV, 2001 HY7
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2009-M39 -- 2005 VB7
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2009-M38 -- 2009 JK1
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2009-M38 -- 2009 MA, 2009 KL2, 2002 LV, 2001 FE90, 2000 OB22
D29Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2009-M40 -- 2009 MZ6
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2009-M38 -- 2009 KJ22
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2009-M38 -- 2009 MM1, 2009 DN1
B40Skylive Obs. in Italy, 2 in MPEC 2009-M38 -- 2002 LV, 215442
H53Thompsonville Obs. in Illinois, 2 in MPEC 2009-M38 -- 2001 FE90, 5620
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-M40 -- 2009 MZ6
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 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
2008 AO112JPL Sentry03362010-2099451.5e-07-4.30-4.620JPL: "Analysis based on 8 observations spanning 1.0097 days (2008-Jan-11.08899 to 2008-Jan-12.098698)." Diameter approximately 0.310 km. from mean, weighted H=20.2.

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 26 June '09

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

1900Grabbed MPEC 2009-M39 - 2005 VB7 - see above
Grabbed MPEC 2009-M40 - 2009 MZ6 - see above
1800Grabbed MPEC 2009-M38 - Daily Orbit Update - see above
0336Noted that JPL Sentry has updated its 2008 AO112 risk assessment - see above