Contents  on 3 July '11


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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 3 July '11

The MPC's NEO Confirmation Page has 8 listings

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

New MPECs  on 3 July '11

Minor Planet Electronic Circulars

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

MPEC 2011-N19 - "18:51 UT" - 2010 DE

<< DOU on 3 July '11 >>  MPEC 2011-N18 - "07:06 UT" - Daily Orbit Update

MPEC 2011-N17 - "03:12 UT" - 2011 ND

MPEC 2011-N16 - "03:09 UT" - 2011 ME5

MPEC 2011-N15 - "03:07 UT" - 2011 MD5

Observers  on 3 July '11

A total of 23 observers appeared in this day's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2011-N18 -- 2011 KP17
7057Krisztian Sarneczky via Apache Point Obs. in New Mexico, 2 in MPECs 2011-N18 & 2011-N19 -- 2010 DE, 2006 HY50
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2011-N15, 2011-N16 & 2011-N17 -- 2011 ND, 2011 ME5, 2011 MD5
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2011-N18 -- 2011 LJ1, 2011 KP17, 2010 NJ1, 99799, 3691
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 11 in MPEC 2011-N18 -- 2011 MY2, 2011 MX2, 2011 MW1, 2011 MV1, 2011 MV, 2011 MQ3, 2011 MO4, 2006 VV2, 2005 MB, 2004 PX27, 2001 QD96
B92Chinon Obs. in France, 1 in MPEC 2011-N18 -- 1036
I19El Gato Gris Obs. in Argentina, 1 in MPEC 2011-N16 -- 2011 ME5
J95Great Shefford Obs. in England, 2 in MPECs 2011-N16 & 2011-N17 -- 2011 ND, 2011 ME5
240Herrenberg Obs. in Germany, 1 in MPEC 2011-N18 -- 87025
695]Mark Trueblood via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2011-N17 -- 2011 ND
704LINEAR in New Mexico, 1 in MPEC 2011-N18 -- 2061
D35Lulin Minor Bodies Tracking (LIMIT) in Taiwan, 4 in MPECs 2011-N15, 2011-N16, 2011-N17 & 2011-N18 -- 2011 ND, 2011 ME5, 2011 MD5, 2011 KP17
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2011-N18 -- 2008 TR10, 68031
A13Naef Obs. in Switzerland, 2 in MPEC 2011-N18 -- 2008 RJ1, 3988
J69North Obs. in England, 1 in MPEC 2011-N18 -- 2011 EZ78
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2011-N15 & 2011-N16 -- 2011 ME5, 2011 MD5
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2011-N18 -- 2011 EZ78, 2011 DL19, 2008 VH
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-N16 -- 2011 ME5
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2011-N15 & 2011-N16 -- 2011 ME5, 2011 MD5
H36Sandlot Obs. in Kansas, 4 in MPECs 2011-N15, 2011-N16, 2011-N17 & 2011-N18 -- 2011 ND, 2011 MZ2, 2011 ME5, 2011 MD5
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2011-N17 & 2011-N18 -- 2011 ND, 2011 MV1, 2006 AT2
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2011-N16 & 2011-N17 -- 2011 ND, 2011 ME5
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2011-N15, 2011-N16 & 2011-N17 -- 2011 ND, 2011 ME5, 2011 MD5
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 July '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 MD5NEODyS16452015-2090991.86e-07-2.45-2.840NEODyS: "Based on 22 optical observations (of which 2 are rejected as outliers) from 2011-06-30.451 to 2011-07-02.986."
JPL Sentry05322019-2103181.1e-08-3.92-4.290JPL: "Analysis based on 22 observations spanning 2.5352 days (2011-Jun-30.45 to 2011-Jul-02.98522)." Diameter approximately 1.045 km. from mean, weighted H=17.5.
2011 MO4NEODyS1645R 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 3 July '11

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

2156Grabbed MPEC 2011-N19 - 2010 DE - see above
1645Noted that NEODyS has posted 2011 MD5 as an impact risk - see above
Noted that NEODyS has removed 2011 MO4 as an impact risk - see above
Grabbed MPEC 2011-N18 - Daily Orbit Update - see above
0532Noted that JPL Sentry has posted 2011 MD5 as an impact risk - see above
0427Grabbed MPEC 2011-N15 - 2011 MD5 - see above
Grabbed MPEC 2011-N16 - 2011 ME5 - see above
Grabbed MPEC 2011-N17 - 2011 ND - see above