Contents  on 11 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 11 May '11

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There were three listings noted earlier today.

New MPECs  on 11 May '11

Minor Planet Electronic Circulars

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

MPEC 2011-J48 - "17:19 UT" - 2010 GV147

MPEC 2011-J47 - "17:17 UT" - 2010 FF7

MPEC 2011-J46 - "12:40 UT" - 2011 JR13

MPEC 2011-J45 - "11:42 UT" - 2010 AK

<< DOU on 11 May '11 >>  MPEC 2011-J44 - "07:10 UT" - Daily Orbit Update

Observers  on 11 May '11

Sixteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 11 in MPEC 2011-J44 -- 2011 JY1, 2011 JW10, 2011 JM5, 2011 JE1, 2011 JD1, 2011 HP, 2011 HO5, 2011 HC24, 2011 GD62, 2011 GC60, 2011 GA62
703Catalina Sky Survey in Arizona, 1 in MPEC 2011-J44 -- 2011 GA55
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPECs 2011-J44, 2011-J45, 2011-J46 & 2011-J48 -- 2011 JY1, 2011 JU2, 2011 JU10, 2011 JR13, 2011 JM5, 2011 JE1, 2011 JD1, 2010 GV147, 2010 AK
A27Eridanus Obs. in Germany, 1 in MPEC 2011-J44 -- 3554
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-J47 -- 2010 FF7
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2011-J47 -- 2010 FF7
J95Great Shefford Obs. in England, 1 in MPEC 2011-J44 -- 2011 HC24
704LINEAR in New Mexico, 6 in MPECs 2011-J44 & 2011-J46 -- 2011 JR13, 2011 GC, 20086, 10145, 7358, 1916
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2011-J44 -- 2011 GA55
A24New Millennium Obs. in Italy, 7 in MPEC 2011-J44 -- 2001 QP181, 263976, 250614, 163696, 162463, 141531, 141432
H23Pear Tree Obs. in Florida, 1 in MPEC 2011-J44 -- 141432
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-J46 -- 2011 JR13
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2011-J46 -- 2011 JR13
104San Marcello Pistoiese Obs. in Italy, 4 in MPEC 2011-J44 -- 2011 GQ65, 2011 EZ78, 2010 TU5, 2004 JO2
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-J44 -- 2011 HS4
291Spacewatch 1.8m telescope in Arizona, 13 in MPEC 2011-J44 -- 2011 JN5, 2011 JM5, 2011 JE1, 2011 HS60, 2011 HO4, 2011 HN5, 2011 HE24, 2011 HC36, 2011 GB55, 2006 RG7, 2005 JA22, 2004 JX20, 2000 CO101
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 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 Sentry13352069-2108312.6e-05-4.52-4.690JPL: "Analysis based on 51 observations spanning 11.919 days (2011-Apr-27.39956 to 2011-May-09.318481)." Diameter approximately 0.049 km. from mean, weighted H=24.2.
NEODyS13352065-2090212.46e-05-4.54-4.690NEODyS: "Based on 51 optical observations (of which 0 are rejected as outliers) from 2011-04-27.400 to 2011-05-09.319."

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 11 May '11

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

1730Grabbed MPEC 2011-J47 - 2010 FF7 - see above
Grabbed MPEC 2011-J48 - 2010 GV147 - see above
1335Noted that JPL Sentry has updated its 2011 HO5 risk assessment - see above
Noted that NEODyS has updated its 2011 HO5 risk assessment - see above
Grabbed MPEC 2011-J44 - Daily Orbit Update - see above
Grabbed MPEC 2011-J45 - 2010 AK - see above
Grabbed MPEC 2011-J46 - 2011 JR13 - see above
Noted that the NEOCP has become empty