Stardust
On Course for Comet Wild 2
1/23/02
Stardust
successfully completed a critical deep space maneuver, positioning
itself on a course to encounter comet Wild 2 in January 2004
and collect dust from the comet.
At
21:56 Universal Time (1:56 p.m. Pacific Time), January 18,
Stardust fired its thrusters for nearly 111 seconds, increasing
the speed of the spacecraft by 2.65 meters per second (about
6 miles per hour).
"This
is the maneuver that sets us up for the bigger maneuver. It's
a combination of increasing the speed of the spacecraft and
at the same time putting it on the path to reach Wild 2,"
said Robert Ryan, Stardust's mission manager at the Jet Propulsion
Laboratory. "It's like the setup pass in a basketball game.
Now we're ready to shoot the basket."
The
spacecraft responded exactly as planned, said Ryan, although
communication was tricky. Stardust is currently the farthest
solar-powered object from the Sun, over 395 million kilometers
(245 million miles) away. The spacecraft's signal confirming
it had completed the maneuver took almost 30 minutes to reach
Earth.
In
January 2004, Stardust will fly through the halo of dust that
surrounds the nucleus of comet Wild 2. The spacecraft will
return to Earth in January 2006 to make a soft landing at
the U.S. Air Force Utah Test and Training Range. Its sample
return capsule, holding microscopic particles of comet and
interstellar dust, will be taken to the planetary material
curatorial facility at NASA's Johnson Space Center, Houston,
Texas, where the samples will be carefully stored and examined.
Stardust's
cometary and interstellar dust samples will help provide answers
to fundamental questions about the origins of the solar system.
Visit the Stardust website for more information on the mission.