Contents  on 4 August '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 4 August '11

The MPC's NEO Confirmation Page has 16 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had sixteen objects listed. Of these, nine were "one nighters." The Tracking News counted a total of 32 listings on the NEOCP on this day.

New MPECs  on 4 August '11

Minor Planet Electronic Circulars

There were eight MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2011-P19 - "23:14 UT" - Comet P/2011 P1 (McNaught)

MPEC 2011-P18 - "22:14 UT" - 2011 OE26

MPEC 2011-P17 - "18:20 UT" - 2011 PU

MPEC 2011-P16 - "17:47 UT" - 2009 OO9

MPEC 2011-P15 - "17:31 UT" - 2011 PT

MPEC 2011-P14 - "16:44 UT" - 2011 PS

MPEC 2011-P13 - "15:03 UT" - 2009 QF31

<< DOU on 4 Aug. '11 >>  MPEC 2011-P12 - "06:05 UT" - Daily Orbit Update

Observers  on 4 August '11

Eighteen observers appeared in this day's MPECs.

CodeObserver / observatory
7057Krisztian Sarneczky via Apache Point Obs. in New Mexico, 2 in MPEC 2011-P12 -- 2001 HW15, 2001 FA1
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPECs 2011-P12, 2011-P13, 2011-P14, 2011-P16, 2011-P17 & 2011-P19 -- 2011 PU, 2011 PS, P/2011 P1, 2011 OY17, 2011 OW4, 2011 OV4, 2011 OC18, 2009 QF31, 2009 OO9
300Bisei Spaceguard Center in Japan, 2 in MPECs 2011-P16 & 2011-P17 -- 2011 PU, 2009 OO9
470Ceccano Obs. in Italy, 1 in MPEC 2011-P19 -- P/2011 P1
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2011-P12 & 2011-P15 -- 2011 PT, 2011 KF4
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-P15 -- 2011 PT
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-P12 -- 2010 TK7
157Frasso Sabino Obs. in Italy, 8 in MPEC 2011-P12 -- 2011 OY17, 2011 OV4, 2011 OC18, 2011 NZ, 2006 WP127, 2004 RX10, 2001 PD1, 2000 CP101
704LINEAR in New Mexico, 1 in MPEC 2011-P17 -- 2011 PU
J75La Sagra Obs. in Spain, 1 in MPEC 2011-P16 -- 2009 OO9
C01Lohrmann Obs. in Germany, 5 in MPEC 2011-P12 -- 2011 GA55, 2011 CG2, 274855, 174050, 138524
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-P18 -- 2011 OE26
J93Mt. Tuffley Obs. in England, 1 in MPEC 2011-P12 -- 1036
C47Nonndorf Obs., 4 in MPEC 2011-P12 -- 2011 OV4, 2011 GA55, 2000 CP101, 3103
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2011-P15 & 2011-P18 -- 2011 PT, 2011 OE26
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-P19 -- P/2011 P1
204Schiaparelli Obs. in Italy, 12 in MPECs 2011-P12 & 2011-P13 -- 2011 OW4, 2011 OV4, 2011 OR5, 2011 OR15, 2011 OQ5, 2011 OE, 2011 GA55, 2009 QF31, 2006 WP127, 2005 TZ51, 2005 JA22, 2004 RX10
E12Siding Spring Survey (SSS) in New South Wales, 9 in MPECs 2011-P12, 2011-P14 & 2011-P19 -- 2011 PS, P/2011 P1, 2011 OX4, 2011 OX17, 2011 OM5, 2011 OL5, 2011 OB, 2011 GG60, 2004 PY27
G56Walnut Creek Obs. in northern California, 1 in MPEC 2011-P12 -- 2011 OY17
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 August '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 OB26NEODyS16002059-209082.83e-06-5.85-5.890NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2011-07-28.474 to 2011-08-03.411."

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 4 August '11

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

0018 8/5Grabbed MPEC 2011-P19 - Comet P/2011 P1 (McNaught) - see above
2227Grabbed MPEC 2011-P18 - 2011 OE26 - see above
1900Grabbed MPEC 2011-P16 - 2009 OO9 - see above
Grabbed MPEC 2011-P17 - 2011 PU - see above
1739Grabbed MPEC 2011-P15 - 2011 PT - see above
1710Grabbed MPEC 2011-P14 - 2011 PS - see above
1600Noted that NEODyS has posted 2011 OB26 as an impact risk - see above
Grabbed MPEC 2011-P12 - Daily Orbit Update - see above
Grabbed MPEC 2011-P13 - 2009 QF31 - see above