Skip Navigation: Avoid going through Home page links and jump straight to content
NASA Logo    + View the NASA Portal  
Near Earth Object Program
NEO Basics Search Programs Discovery Statistics Space Missions News Frequently Asked Questions
Orbit Diagrams Orbit Elements Close Approaches Impact Risk Images Related LInks

Asteroid 2007 WD5

Artist Rendering uses an arrow to show projected path of asteroid. 2007 WD5 Mars Collision Effectively Ruled Out - Impact Odds now 1 in 10,000
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.

Full Story


Artist Rendering uses an arrow to show projected path of asteroid. Mars Impact Seems Less Likely
January 8, 2008

We have updated the orbit of 2007 WD5 using new observations from the 3.5-meter telescope at the Calar Alto Observatory in Spain. This update also incorporates refinements to the Sloan precovery observations mentioned previously. While the best estimate of close approach distance remains steady at about 30,000 km, the uncertainty in position at the close approach has decreased by a factor of three. As a result, the impact probability estimate has fallen to 2.5%, or 1-in-40 odds.

Full Story


Artist Rendering uses an arrow to show projected path of asteroid. New Observations Slightly Decrease Mars Impact Probability
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).

Full Story


Artist Rendering uses an arrow to show projected path of asteroid. Mars Impact Probability Increases to 4 Percent
December 28, 2007

The impact probability for a collision of asteroid 2007 WD5 with Mars on January 30 has increased from 1.3% to 3.9%. Pre-discovery observations of asteroid 2007 WD5, taken on November 8, 2007 have allowed its orbit to be refined and the uncertainties for the late January Mars encounter have been improved. The impact probability resulting from the recent orbit refinement has increased to a surprising 3.9% (about 1 in 25 odds).

Full Story


Artist Rendering uses an arrow to show projected path of asteroid. Recently Discovered Asteroid Could Hit Mars in January
December 21, 2007

A recently discovered asteroid which passed close to the Earth in November, is now headed towards a very close passage by Mars in late January, and there is a small chance that it could hit that planet. The probability of a collision is only 1 chance in 75, but scientists are excited about the possibility. If it happens, the impact would occur on January 30, 2008 at around 10:55 UT (2:55 a.m. PST).

Full Story

Menu
FIRST GOV   NASA Home Page Site Manager: Paul Chodas
Webmaster: Ron Baalke
Last Updated:
Feedback Credits Privacy Mailing List NASA