May 15, 2006
Michael Braukus/Dolores Beasley
Headquarters, Washington
(202) 358-1979/1753
Kim Newton
Marshall Space Flight Center, Huntsville, Ala.
(256) 544-0034
MEDIA ADVISORY: M06-081
NASA RELEASES ACCIDENT REPORT SUMMARY
NASA released a summary Monday of the findings about why its
Demonstration of Autonomous Rendezvous Technology spacecraft did not
complete its mission and collided with the intended rendezvous
satellite on April 15, 2005. Because the official mishap
investigation board report contains information protected by U.S.
International Traffic in Arms Regulations, it will not be publicly
released. Instead, NASA has prepared a summary of the report, which
omits the protected information. The summary is available at:
http://www.nasa.gov/dart or
http://www.nasa.gov/formediaScott Croomes, the chairman of the mishap investigation board, will be
available for telephone media queries Tuesday at 2 p.m. EDT. To
participate reporters must call the Marshall Space Flight Center,
Huntsville, Ala., newsroom at: (256) 544-0034 by 1:30 p.m. EDT. Audio
of the teleconference will be available at:
http://www.nasa.gov/newsaudio This NASA craft was a low-cost, high-risk technology demonstrator,
designed to establish autonomous rendezvous capabilities and
proximity operations for the U.S. space program. It was successfully
launched from Vandenberg Air Force Base, Calif., on April 15, 2005.
The spacecraft was to autonomously rendezvous with and perform a
series of maneuvers in close proximity to a communications satellite
no longer in use. The NASA spacecraft performed nominally during the
first eight hours of the mission ? launch, checkout, and rendezvous
phases. It accomplished all objectives up to that point, though
ground operations personnel noticed some anomalies with the craft's
navigation system.
During proximity operations, the spacecraft began using more
propellant than expected. Approximately 11 hours into the mission,
the craft detected its propellant supply was depleted and began a
series of maneuvers for departure and retirement. Although not known
at the time, it made contact with and boosted the rendezvous
satellite's orbit 1.2 nautical miles higher. The rendezvous satellite
was not damaged.
Both satellites are in low-Earth orbits that will not be a hazard to
other spacecraft. They will eventually burn up upon re-entry into the
Earth's atmosphere.
The spacecraft and the Pegasus launch vehicle were developed by
Orbital Sciences Corp., Dulles, Va. NASA's Exploration Systems
Mission Directorate funded the project.
The mishap investigation report was the result of an investigation by
an eight-member board established by NASA on April 21, 2005. The
summary of the report was produced by the Exploration Systems Mission
Directorate.
For information about NASA and agency programs, visit:
http://www.nasa.gov/home -end-
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