Contents  on 6 July '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 6 July '11

The MPC's NEO Confirmation Page has 4 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four objects listed. Of these, one was a "one nighter." So far The Tracking News has counted a total of five listings on the NEOCP today.

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 6 July '11

Minor Planet Electronic Circulars

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

MPEC 2011-N26 - "16:29 UT" - 2011 NV

MPEC 2011-N25 - "14:07 UT" - 1984 QY1 = 2007 VB1 = 2011 NQ

<< DOU on 6 July '11 >>  MPEC 2011-N24 - "07:06 UT" - Daily Orbit Update

Observers  on 6 July '11

Fifteen observers appear in today's MPECs.

CodeObserver / observatory
7057Krisztian Sarneczky via Apache Point Obs. in New Mexico, 4 in MPEC 2011-N24 -- 2006 SQ78, 2006 HD2, 2006 FX, 2006 DT14
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2011-N24 & 2011-N26 -- 2011 NV, 2011 ND, 2011 MZ2, 2011 MW2, 2011 MU, 2011 MT, 2011 MQ3, 2011 MO4, 2011 MN4, 2011 ME5, 2011 MD5, 2011 LK19, 2011 LJ1, 2011 LA19, 2011 AG5
300Bisei Spaceguard Center in Japan, 1 in MPEC 2011-N24 -- 20086
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPEC 2011-N24 -- 2011 LA19, 2011 EZ78
A17Guidestar Obs. in Germany, 1 in MPEC 2011-N24 -- 2011 MO4
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2011-N24 -- 54401
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2011-N26 -- 2011 NV
A13Naef Obs. in Switzerland, 2 in MPEC 2011-N24 -- 68348, 267759
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2011-N24 -- 275714
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2011-N24 -- 2011 NP
104San Marcello Pistoiese Obs. in Italy, 3 in MPEC 2011-N24 -- 2011 LC19, 2011 KP17, 2008 LV16
233San Vito Obs. in Italy, 1 in MPEC 2011-N24 -- 2102
H36Sandlot Obs. in Kansas, 2 in MPEC 2011-N24 -- 2011 MQ3, 2002 XU66
204Schiaparelli Obs. in Italy, 5 in MPEC 2011-N24 -- 2011 MD, 2011 LD19, 2007 RT9, 2005 AN26, 2003 BK47
I15Wishing Star Obs. in Rhode Island, 3 in MPEC 2011-N24 -- 2008 LV16, 2102, 1917
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 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 MDJPL Sentry2315R E M O V E DJPL #3 for the day
2011 AG5JPL Sentry23152040-204743.2e-04-1.80-1.801JPL: "Analysis based on 172 observations spanning 178.09 days (2011-Jan-08.2673 to 2011-Jul-05.359321)." Diameter approximately 0.150 km. from mean, weighted H=21.8.
NEODyS15432040-205367.57e-04-1.43-1.431NEODyS: "Based on 172 optical observations (of which 0 are rejected as outliers) from 2011-01-08.268 to 2011-07-05.360."

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 6 July '11

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

2359Grabbed MPEC 2011-N26 - 2011 NV - see above
2315Noted that JPL Sentry has updated its 2011 AG5 risk assessment - see above
Noted that JPL Sentry has removed 2011 MD as an impact risk - see above
1543Noted that NEODyS has updated its 2011 AG5 risk assessment - see above
Noted that JPL Sentry has reposted 2011 MD as an impact risk - see above
Grabbed MPEC 2011-N24 - Daily Orbit Update - see above
Grabbed MPEC 2011-N25 - 1984 QY1 = 2007 VB1 = 2011 NQ - see above
0018Noted that JPL Sentry has removed 2011 MD as an impact risk - see above