Contents  on 16 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 16 June '11

The MPC's NEO Confirmation Page has 2 listings

When last checked at 2359 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 16 June '11

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been nine MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2011-M09 - "19:20 UT" - 2010 LQ68

MPEC 2011-M08 - "19:16 UT" - 2010 LP68

MPEC 2011-M07 - "19:14 UT" - 2010 JJ124

<< DOU on 16 June '11 >>  MPEC 2011-M06 - "07:06 UT" - Daily Orbit Update

MPEC 2011-M05 - "04:52 UT" - PHAs

MPEC 2011-M04 - "04:52 UT" - Unusual Minor Planets

MPEC 2011-M03 - "04:52 UT" - Amors

MPEC 2011-M02 - "04:52 UT" - Atens and Apollos

MPEC 2011-M01 - "04:47 UT" - Observable Comets

Observers  on 16 June '11

Five observers appear in today's MPECs.

CodeObserver / observatory
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPEC 2011-M06 -- 2011 LL2, 2011 LJ1, 2011 LH, 2011 LD19, 2011 KW15, 2011 KO17, 2011 KK15, 2011 JP29, 2005 LY19
304Las Campanas Obs. in Chile, 1 in MPEC 2011-M07 -- 2010 JJ124
568/program code "/" (24) on Mauna Kea in Hawaii, 2 in MPECs 2011-M08 & 2011-M09 -- 2010 LQ68, 2010 LP68
926Tenagra II Obs. in Arizona, 1 in MPEC 2011-M06 -- 267759
A48Verona Obs. in Italy, 1 in MPEC 2011-M06 -- 2011 EZ78
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 June '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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 Sentry21092108-211021.6e-09-5.74-6.020JPL: "Analysis based on 25 observations spanning 5.9211 days (2011-Jun-10.3103 to 2011-Jun-16.231383)." Diameter approximately 0.767 km. from mean, weighted H=18.2.

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 16 June '11

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

2109Noted that JPL Sentry has updated its 2011 LC19 risk assessment - see above
2108Grabbed MPEC 2011-M08 - 2010 LP68 - see above
Grabbed MPEC 2011-M09 - 2010 LQ68 - see above
1916Grabbed MPEC 2011-M07 - 2010 JJ124 - see above
1426Grabbed MPEC 2011-M06 - Daily Orbit Update - see above
0508Grabbed MPEC 2011-M01 - Observable Comets - see above
Grabbed MPEC 2011-M02 - Atens and Apollos - see above
Grabbed MPEC 2011-M03 - Amors - see above
Grabbed MPEC 2011-M04 - Unusual Minor Planets - see above
Grabbed MPEC 2011-M05 - PHAs - see above