Contents  on 16 May '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 May '11

The MPC's NEO Confirmation Page has 5 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of eleven listings on the NEOCP 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 16 May '11

Minor Planet Electronic Circulars

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

<< DOU on 16 May '11 >>  MPEC 2011-K01 - "07:09 UT" - Daily Orbit Update

Observers  on 16 May '11

Six observers appear in today's MPEC.

CodeObserver / observatory
127Bornheim Obs. in Germany, 3 in MPEC 2011-K01 -- 2011 CY46, 274138, 260141
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPEC 2011-K01 -- 2011 JR13, 2011 JB10, 2011 HT, 2011 HP, 2011 HO5
A24New Millennium Obs. in Italy, 7 in MPEC 2011-K01 -- 2010 TU5, 2004 GP, 68348, 267759, 188174, 137170, 1917
H23Pear Tree Obs. in Florida, 1 in MPEC 2011-K01 -- 188174
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-K01 -- 2010 TV149
204Schiaparelli Obs. in Italy, 11 in MPEC 2011-K01 -- 2011 JK, 2011 JD1, 2011 HS4, 2011 HR, 2011 HH1, 2011 GX65, 2011 GD62, 2010 XJ, 2010 TV149, 2007 LQ19, 2006 GY2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 May '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 (backup) risk pages.





Notes for Today's Latest Risk Assessments
2011 HO5JPL Sentry15472079-209022.7e-07-6.55-6.560JPL: "Analysis based on 63 observations spanning 17.942 days (2011-Apr-27.39956 to 2011-May-15.34108)." Diameter approximately 0.048 km. from mean, weighted H=24.3.
NEODyS1547R E M O V E D-

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 May '11

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

1547Noted that JPL Sentry has updated its 2011 HO5 risk assessment - see above
Noted that NEODyS has removed 2011 HO5 as an impact risk - see above
Grabbed MPEC 2011-K01 - Daily Orbit Update - see above