Phobos (left) & Deimos from MER Spirit. 
Credit NASA/JPL/Cornell/Texas A&M.

A two-moon sky imaged from a truly distant robotic observatory -- the Mars rover Spirit, which shot this stack with its Panoramic Camera at 150-sec. intervals. Deimos is seen in seven positions at right while closer and larger Phobos speeds through the frame. Phobos was discovered 130 years ago today by Asaph Hall, six days after Deimos. Both are believed to be captured asteroids. Credit: NASA/ JPL/ Cornell/ Texas A&M. See more Phobos images at JPL.


Contents  on 17 August '07

Resources:

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 17 August '07

Minor-Object Science  on 17 August '07

NEOCP Activity  on 17 August '07

The MPC's NEO Confirmation Page has 1 listing: 1 new

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new listing. This was a "one nighter."

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs  on 17 August '07

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 17 Aug. '07 >>  MPEC 2007-Q02 - "06:08 UT" - Daily Orbit Update

Observers  on 17 August '07

Fourteen observing facilities appear in today's MPECs.

A81Balzaretto Obs. in Italy, 1 in MPEC 2007-Q02 -- 2007 PF28
B09Capannoli Obs. in Italy, 3 in MPEC 2007-Q02 -- 2007 PU11, 2007 LR32, 2004 ST9
J95Great Shefford Obs. in England, 3 in MPEC 2007-Q02 -- 2007 PF28, 2007 PR25, 2007 PS25
H51Greiner Research Obs. in Wisconsin, 5 in MPEC 2007-Q02 -- 2007 PF28, 2007 PU11, 2007 PP9, 2007 PE8, 2007 DK8
379Hamamatsu-Yuto Obs. in Japan, 6 in MPEC 2007-Q02 -- 2007 PF28, 2007 PE8, 2007 LR32, 2007 DT103, 86324, 85275
F84Hibiscus Obs. in Tahiti, 1 in MPEC 2007-Q02 -- 2007 OV
704LINEAR in New Mexico, 5 in MPEC 2007-Q02 -- 2007 PF28, 2007 DK8, 7350, 5143, 4183
130Lumezzane Obs. in Italy, 10 in MPEC 2007-Q02 -- 2007 PP9, 2007 NC5, 2007 HE15, 2007 DT103, 2007 CK26, 2003 OR14, 2002 NN4, 2000 QT7, 1999 JU3, 4183
900Moriyama Obs., 1 in MPEC 2007-Q02 -- 16636
J69North Obs. in England, 1 in MPEC 2007-Q02 -- 105140
H45Petit Jean Mtn. South Obs. in Arkansas, 13 in MPEC 2007-Q02 -- 2000 PN8, 2007 PP9, 2007 PE8, 2007 NC5, 2007 LR32, 2007 LA15, 2007 DT103, 2007 CK26, 2003 SW222, 1999 VO6, 145656, 87309, 86324
H062Robert Hutsebaut in Belgium via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-Q02 -- 2007 PF28
D21Shenton Park Obs., 6 in MPEC 2007-Q02 -- 2007 PF28, 2007 PR25, 2007 PS25, 2000 PN8, 2007 PE8, 2007 PP6
198Wildberg Obs. in Germany, 2 in MPEC 2007-Q02 -- 2007 NC5, 1997 PN

Impact Risk Monitoring  on 17 August '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2354 UTC)
See the CRT page for a list of all objects rated recently as risks.
Note that the time horizon for JPL is 100 years from today and for NEODyS is now usually the year 2090.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2007 PR25JPL1355R E M O V E DJPL: Risk listing removed at 0957 UTC.
NEODyS1355R E M O V E D
2007 PF28JPL1355R E M O V E DJPL: Risk listing removed at 0959 UTC.
NEODyS1355R E M O V E D

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 17 August '07

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

1912Added link to news story, "Sedona Citizens Fight to Save Starry Skies"
Added link to news story, "Scientist: Calculations Prove Life Began in Comet"
Added link to news story, "Aurigid Meteor Shower Peaks September 1"
1406Added MOS paper, "The largest Kuiper belt objects" - see above
Added link to news story, "Old star shows signs of Earthlike planets"
Added link to news story, "Polluted Dead Star Indicates Planets Like Earth May Have Formed Around Other Stars"
Added link to news story, "Killer Space Rocks"
1355Noted that JPL has removed 2007 PF28 as an impact risk - see above
Noted that NEODyS has removed 2007 PF28 as an impact risk - see above
Noted that JPL has removed 2007 PR25 as an impact risk - see above
Noted that NEODyS has removed 2007 PR25 as an impact risk - see above
Grabbed MPEC 2007-Q02 - Daily Orbit Update - see above