Comet Levy-Shoemaker 9 fragment W 
hits Jupiter. Credit: NASA JPL/Galileo.

Enroute for 57 months and still 16 months away from the Jupiter system, the Galileo spacecraft on this day 13 years ago caught the flash of the last known of 20-plus fragments that hit Jupiter from comet Shoemaker-Levy 9. These images in green light are, from left to right, 2-1/3 seconds apart. Credit: NASA JPL/Galileo.

Contents  on 22 July '07


The latest news: framed access (best), RSS news feed (flags updates), or redirection - Note: A/CC has a main Web site and a backup site.

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 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.

Minor-Object News  on 22 July '07

Minor-Object Science  on 22 July '07

NEOCP Activity  on 22 July '07

The MPC's NEO Confirmation Page has 4 listings: 1 new, 3 updated

When last checked at 2259 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and three updated listings. Of these, two were "one nighters." Major News counted a total of nine objects listed on the NEOCP at some point on this day.

New MPECs  on 22 July '07

Minor Planet Electronic Circulars

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

MPEC 2007-O39 - "18:37 UT" - 2007 OH3

MPEC 2007-O38 - "18:35 UT" - 2007 OG3

MPEC 2007-O37 - "16:21 UT" - 2005 OE3

<< DOU on 22 July '07 >>  MPEC 2007-O36 - "06:07 UT" - Daily Orbit Update

Observers  on 22 July '07

Nineteen observing facilities appeared in this day's MPECs.

B03Alter Satzberg Obs. in Austria, 1 in MPEC 2007-O39 -- 2007 OH3
H55Astronomical Research Obs. in Illinois, 6 in MPECs 2007-O36, 2007-O38 & 2007-O39 -- 2007 OH3, 2007 OG3, 2007 OX, 2003 SW222, 2001 FD90, 1999 VG22
235CAST Obs., 1 in MPEC 2007-O36 -- 24443
703Catalina Sky Survey in Arizona, 1 in MPEC 2007-O38 -- 2007 OG3
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2007-O39 -- 2007 OH3
734Farpoint Obs. in Kansas, 2 in MPECs 2007-O38 & 2007-O39 -- 2007 OH3, 2007 OG3
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2007-O39 -- 2007 OH3
H89Galaxy Blues Obs. in Ontario, 1 in MPEC 2007-O36 -- 86324
704LINEAR in New Mexico, 1 in MPEC 2007-O39 -- 2007 OH3
130Lumezzane Obs. in Italy, 2 in MPEC 2007-O36 -- 2003 MT9, 2001 RV17
474Mt. John Obs. in New Zealand, 1 in MPEC 2007-O39 -- 2007 OH3
A24New Millennium Obs. in Italy, 5 in MPEC 2007-O36 -- 2007 MB24, 2007 LR32, 2004 ST9, 136818, 85275
J69North Obs. in England, 1 in MPEC 2007-O36 -- 2003 MT9
473Remanzacco Obs. in Italy, 1 in MPEC 2007-O39 -- 2007 OH3
B38Santa Mama Obs. in Italy, 3 in MPEC 2007-O36 -- 2007 NQ, 2007 CK26, 2003 MT9
E12Siding Spring Survey in New South Wales, 2 in MPECs 2007-O36 & 2007-O39 -- 2007 OH3, 2007 LV
094Simeis Astrophysical Obs. in Ukraine, 1 in MPEC 2007-O36 -- 2007 DT103
6735Jim Young via Table Mtn. Obs. in southern California, 2 in MPECs 2007-O37 & 2007-O39 -- 2007 OH3, 2005 OE3
198Wildberg Obs. in Germany, 1 in MPEC 2007-O36 -- 2007 OX

Impact Risk Monitoring  on 22 July '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2259 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 OG3JPL2259204017.4e-10-6.67-6.670JPL: "Analysis based on 17 observations spanning 2.9331 days (2007-Jul-19.44939 to 2007-Jul-22.382539)." Diameter approximately 0.390 km. from mean, weighted H=19.7.

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 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 22 July '07

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

2259Noted that JPL has posted 2007 OG3 as an impact risk - see above
2131Added news report, "Asteroid discoveries (updated)"
2059Grabbed MPEC 2007-O38 - 2007 OG3 - see above
Grabbed MPEC 2007-O39 - 2007 OH3 - see above
1824Added MOS paper, "Discovery of extreme asymmetry in the debris disk surrounding HD 15115" - see above
Added news report, "Bits & pieces"
1719Grabbed MPEC 2007-O37 - 2005 OE3 - see above
1438Grabbed MPEC 2007-O36 - Daily Orbit Update - see above