Contents  on 20 June '11


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 '11

The MPC's NEO Confirmation Page has 2 listings

When last checked at 2323 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two objects listed. Both of these 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 '11

Minor Planet Electronic Circulars

As of last check at 2323 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 20 June '11 >>  MPEC 2011-M15 - "07:05 UT" - Daily Orbit Update

MPEC 2011-M14 - "01:15 UT" - 2005 XN4

Observers  on 20 June '11

Eight observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPEC 2011-M15 -- 2011 LJ20, 2011 LJ1, 2011 LC19, 2011 LA19, 2011 KP17, 2011 KN9, 2011 HO, 2011 GL62, 2011 GL60, 2006 SV134
J95Great Shefford Obs. in England, 2 in MPECs 2011-M14 & 2011-M15 -- 2011 LC19, 2005 XN4
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2011-M15 -- 102873
H23Pear Tree Obs. in Florida, 1 in MPEC 2011-M15 -- 7482
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2011-M15 -- 2011 LC19
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-M15 -- 2011 LC19
204Schiaparelli Obs. in Italy, 1 in MPEC 2011-M15 -- 2010 NJ1
E12Siding Spring Survey in New South Wales, 1 in MPEC 2011-M15 -- 2008 LV16
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 June '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2323 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. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON risk pages.





Notes for Today's Latest Risk Assessments
2011 LC19JPL Sentry1436R E M O V E DJPL: Risk listing removed at 0949 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 '11

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

1436Noted that JPL Sentry has removed 2011 LC19 as an impact risk - see above
Grabbed MPEC 2011-M15 - Daily Orbit Update - see above
0215Grabbed MPEC 2011-M14 - 2005 XN4 - see above