Sudbury impact structure space radar 
image. Credit: NASA GSFC.

The Ontario Sudbury impact structure, seen here in Space Shuttle SIR-B radar imaging from a NASA GSFC tutorial on "Remote Sensing of Craters," shows evidence of its great age and the geologic forces that have reshaped it from circular to ellipsoidal. New evidence of the impact has been found recently to the southwest in Minnesota -- see news below.

Contents  on 15 July '07


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 this year with a calendar interface. And use the all-up news archive to access news anytime since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.

Minor-Object News  on 15 July '07

Minor-Object Science  on 15 July '07

No science papers are known or prepared yet today.

NEOCP Activity  on 15 July '07

The MPC's NEO Confirmation Page has 6 listings: 2 new, 3 updated, 1 comet

When last checked at 2356 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new, three updated, and one comet listings. Of these, three were "one nighters." So far Major News has counted a total of seven objects listed on the NEOCP at some point today.

New MPECs  on 15 July '07

Minor Planet Electronic Circulars

As of last check at 2356 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 15 July '07 >>  MPEC 2007-N41 - "06:07 UT" - Daily Orbit Update

Observers  on 15 July '07

Twelve observing facilities appear in today's MPECs.

H55Astronomical Research Obs. in Illinois, 8 in MPEC 2007-N41 -- 2007 NQ, 2007 MC4, 2007 MR, 2007 LS, 2007 KJ, 2007 GC, 2004 BE11, 2003 WB25
215Buchloe Obs. in Germany, 1 in MPEC 2007-N41 -- 2001 RV17
703Catalina Sky Survey in Arizona, 3 in MPEC 2007-N41 -- 2007 LV8, 2006 GB, 159928
095Crimean Astrophysical Obs. in the Ukraine, 1 in MPEC 2007-N41 -- 2007 KW2
442Gualba Obs. in Spain, 1 in MPEC 2007-N41 -- 24443
A17Guidestar Obs. in Germany, 3 in MPEC 2007-N41 -- 2007 ML13, 2007 LV8, 2006 WP127
046Klet Obs. in the Czech Republic, 1 in MPEC 2007-N41 -- 2007 NQ
A13Naef Obs. in Switzerland, 2 in MPEC 2007-N41 -- 2007 FK1, 2006 XA
A24New Millennium Obs. in Italy, 4 in MPEC 2007-N41 -- 2007 MB24, 2007 LR32, 2004 ST9, 136818
G69Thousand Oaks Obs. in southern California, 1 in MPEC 2007-N41 -- 85275
F85Tiki Obs. in Tahiti, 1 in MPEC 2007-N41 -- 2007 LQ19
198Wildberg Obs. in Germany, 1 in MPEC 2007-N41 -- 2007 MB24

Impact Risk Monitoring  on 15 July '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2356 UTC)
See the CRT page for a list of all objects rated as risks in the last 30 days.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2080.
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
2007 LQ19JPL1439R E M O V E DJPL: Risk listing removed at 1000 UTC.

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 an 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" for more about this.

Chronology  on 15 July '07

Times are UTC for when the items were noted or added by Major News.

1920Added link to news story, "RP at risk from asteroids"
Added link to news story, "Meteorite debris from 1.85 billion years ago found in NE Minn."
1513Added news report, "Distant EKOs"
Added link to news story, "NASA Ponders Human Mission to Moons of Mars"
1439Noted that JPL has removed 2007 LQ19 as an impact risk - see above
Noted that NEODyS has removed 2007 LQ19 as an impact risk - see above
Grabbed MPEC 2007-N41 - Daily Orbit Update - see above