Contents  on 20 July '10

Note: A/CC news pages will update infrequently for much of the remainder of July.


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 20 July '10

The MPC's NEO Confirmation Page has 9 listings: 4 new, 5 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and five updated listings. Of these, two were "one nighters." The Tracking News counted a total of twelve listings on the NEOCP at some point on this day.

New MPECs  on 20 July '10

Minor Planet Electronic Circulars

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

MPEC 2010-O15 - "20:55 UT" - 2010 OC

MPEC 2010-O14 - "20:48 UT" - 2010 NY65

MPEC 2010-O13 - "20:20 UT" - 2002 AC9

<< DOU on 20 July '10 >>  MPEC 2010-O12 - "06:12 UT" - Daily Orbit Update

Observers  on 20 July '10

Nineteen observing facilities appeared in this day's MPECs.

CodeObserver / observatory
I08Alianza S4 Obs. in Argentina, 1 in MPEC 2010-O15 -- 2010 OC
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPEC 2010-O12 -- 2010 NK1, 2010 NH, 2010 NG1, 2010 NB2, 2010 FO92
G58Chabot Obs. in northern California, 2 in MPEC 2010-O12 -- 2010 NB2, 2010 MW1
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 3 in MPECs 2010-O12 & 2010-O15 -- 2010 OC, 2010 EV45, 2009 WC26
151Eschenberg Obs. in Switzerland, 1 in MPEC 2010-O12 -- 2009 WC26
196Homburg-Erbach Obs. in Germany, 1 in MPEC 2010-O12 -- 161998
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2010-O15 -- 2010 OC
704LINEAR in New Mexico, 2 in MPEC 2010-O12 -- 2009 WC26, 85989
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPECs 2010-O12 & 2010-O14 -- 2010 NY65, 2010 NT1, 2005 PY16
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2010-O12 -- 2010 EV45, 2008 OS9
900Moriyama Obs. in Japan, 1 in MPEC 2010-O15 -- 2010 OC
A13Naef Obs. in Switzerland, 3 in MPEC 2010-O12 -- 2009 WC26, 2006 KZ112, 230979
D90*Rolando Ligustri in Italy via RAS Obs. Moorook in South Australia, 1 in MPEC 2010-O15 -- 2010 OC
H36Sandlot Obs. in Kansas, 1 in MPEC 2010-O15 -- 2010 OC
D21Shenton Park Obs. in Western Australia, 2 in MPECs 2010-O12 & 2010-O13 -- 2002 BF25, 2002 AC9
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2010-O12 -- 2010 OA, 6178
C51WISE in Earth polar orbit, 1 in MPEC 2010-O14 -- 2010 NY65
198Wildberg Obs. in Germany, 2 in MPEC 2010-O12 -- 2010 OB, 2010 EX119
A79Zvezdno Obshtestvo Obs. in Bulgaria, 1 in MPEC 2010-O15 -- 2010 OC
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 July '10

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
2010 OCJPL Sentry2359207711.6e-08-4.91-4.910JPL: "Analysis based on 27 observations spanning 1.3873 days (2010-Jul-19.31361 to 2010-Jul-20.70089)." Diameter approximately 0.590 km. from mean, weighted H=18.8.
2010 NY65JPL Sentry23592011-2105223.0e-08-4.53-4.700JPL: "Analysis based on 7 observations spanning 6.1357 days (2010-Jul-14.14345 to 2010-Jul-20.279169)." Diameter approximately 0.223 km. from mean, weighted H=20.9.
2010 NB2NEODyS1300R E M O V E D-
2010 NHJPL Sentry13002089-210731.7e-06-6.36-6.420JPL: "Analysis based on 61 observations spanning 14.818 days (2010-Jul-04.42235 to 2010-Jul-19.240805)." Diameter approximately 0.025 km. from mean, weighted H=25.7.

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 20 July '10

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

2359Noted that JPL Sentry has posted 2010 NY65 as an impact risk - see above
Noted that JPL Sentry has posted 2010 OC as an impact risk - see above
Grabbed MPEC 2010-O13 - 2002 AC9 - see above
Grabbed MPEC 2010-O14 - 2010 NY65 - see above
Grabbed MPEC 2010-O15 - 2010 OC - see above
1300Noted that NEODyS has removed 2010 NB2 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 NH risk assessment - see above
Grabbed MPEC 2010-O12 - Daily Orbit Update - see above