Contents  on 19 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 19 May '11

The MPC's NEO Confirmation Page has 1 listing

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one object listed.

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 19 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 19 May '11 >>  MPEC 2011-K09 - "07:06 UT" - Daily Orbit Update

Observers  on 19 May '11

Nine observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPEC 2011-K09 -- 2011 GC, 2011 GA62, 2010 TU5, 2007 LQ19, 2004 JO2, 2004 FU4, 2000 JE5, 277279, 275714, 275545
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 15 in MPEC 2011-K09 -- 2011 JR13, 2011 HO5, 2011 GC60, 2011 ET29, 2010 XJ, 2010 UF7, 2009 CQ5, 2005 UL, 2005 TR15, 2005 RC34, 2005 LY19, 1997 CZ3, 39572, 164202, 137158
560Madonna di Dossobuono Obs. in Italy, 4 in MPEC 2011-K09 -- 2011 HQ, 2011 HP, 2011 HO, 2010 TU5
152Moletai Obs. in Lithuania, 1 in MPEC 2011-K09 -- 2010 KO10
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2011-K09 -- 2011 BJ24
A24New Millennium Obs. in Italy, 1 in MPEC 2011-K09 -- 275545
204Schiaparelli Obs. in Italy, 3 in MPEC 2011-K09 -- 277473, 275714, 275545
926Tenagra II Obs. in Arizona, 1 in MPEC 2011-K09 -- 275545
G56Walnut Creek Obs. in northern California, 2 in MPEC 2011-K09 -- 2011 HQ, 2011 HO
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 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 Sentry1530209017.2e-08-7.13-7.130JPL: "Analysis based on 71 observations spanning 20.839 days (2011-Apr-27.39956 to 2011-May-18.23809)." Diameter approximately 0.048 km. from mean, weighted H=24.3.

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 19 May '11

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

1530Noted that JPL Sentry has updated its 2011 HO5 risk assessment - see above
Grabbed MPEC 2011-K09 - Daily Orbit Update - see above