Mars im November und Dezember .

[gsac]

Wie zu erwarten war, wird das wohl eher nichts mit einem Impakt
auf dem Mars. Die letzten drei Zeilen der nachfolgenden Nachricht
habe ich auf "fett" gesetzt...

Alex


New Observations Slightly Decrease Mars Impact Probability
Don Yeomans, Paul Chodas and Steve Chesley
NASA/JPL Near-Earth Object Program Office
January 2, 2008

Additional position observations for asteroid 2007 WD5 taken on December
29 through January 2 have been used to improve the accuracy of the
asteroid's orbit. As a result, the range of possible paths past Mars has
narrowed by a factor of 3 and the most likely path has moved a little
farther away from the planet, causing the Mars impact probability to
decrease slightly to 3.6% (about one chance in 28). The new positional
observations were made using the 2.4 meter telescope at New Mexico
Tech's Magdalena Ridge Observatory and reported by astronomer Bill Ryan.
It seems likely that as additional observations further shrink the
uncertainty region of this asteroid, the region will no longer intersect
Mars and the impact probability will quickly drop to zero.

[gsac]

....und so scheint es sich nun letztlich auch zu bestätigen:

http://neo.jpl.nasa.gov/news/news156.html

2007 WD5 Mars Collision Effectively Ruled Out - Impact Odds now 1 in 10,000
Steve Chesley, Paul Chodas and Don Yeomans
NASA/JPL Near-Earth Object Program Office
January 9, 2008

Since our last update, we have received numerous tracking measurements
of asteroid 2007 WD5 from four different observatories. These new data
have led to a significant reduction in the position uncertainties during
the asteroid's close approach to Mars on Jan. 30, 2008. As a result, the
impact probability has dropped dramatically, to approximately 0.01% or 1
in 10,000 odds, effectively ruling out the possible collision with Mars....usw...

Alex  [...eigentlich "schade", aber die Natur geht nun mal ihren Weg!  ]

[astro112233]

Schade, schade 

Quelle: Astro-info

Doch kein Asteroideneinschlag auf dem Mars.
Die Hoffnung vieler Astronomen wird sich wahrscheinlich nicht erfüllen: Ein paar Wochen lang sah es so aus, als würde der Asteroid "2007 WD5" Ende Januar mit dem Mars kollidieren. Laut Beobachtungen kommt es aber wohl doch nicht dazu: Der 55 Meter große Asteroid wird demnach am 30. Januar im Abstand von 4.000 Kilometern am Mars vorbei fliegen.

http://news.astronomie.info/ai.php/200801030

Gruß Konrad.