PASADENA, Calif. -- NASA's solar-powered Juno spacecraft
successfully refined its flight path Wednesday with the mission's first
trajectory correction maneuver. The maneuver took place on Feb. 1. It
is the first of a dozen planned rocket firings that, over the next five
years, will keep Juno on course for its rendezvous with Jupiter.
"We had a maneuver planned soon after launch but our Atlas V rocket
gave us such a good ride we didn't need to make any trajectory
changes," said Rick Nybakken, Juno project manager from NASA's Jet
Propulsion Laboratory in Pasadena, Calif. "It is good to get another
first under our belt. This burn couldn't have gone any better."
The trajectory correction maneuver, which adjusts the spacecraft's
flight path, began at 10:10 a.m. PST (1:10 p.m. EST) on Feb. 1. The
Juno spacecraft's thrusters fired for 25 minutes, consumed about 6.9
pounds (3.11 kilograms) of fuel and changed the spacecraft's speed by
3.9 feet, or 1.2 meters, per second. The next big maneuver for Juno
will occur in late August of 2012 when Juno executes its first of two
deep space maneuvers to set the stage for its Earth flyby - and gravity
assist - on its way to Jupiter.
Launched on Aug. 5, 2011, Juno is 182 days and 279 million miles
(449 million kilometers) into its five-year, 1,740-million-mile
(2,800-million-kilometer) journey to Jupiter. Once in orbit, the
spacecraft will orbit the planet's poles 33 times and use its
collection of eight science instruments to probe beneath the gas
giant's obscuring cloud cover to learn more about Jupiter's origins,
structure, atmosphere and magnetosphere, and look for a potential solid
planetary core.
Juno's name comes from Greek and Roman mythology. The god Jupiter
drew a veil of clouds around himself to hide his mischief, and his
wife, the goddess Juno, was able to peer through the clouds and reveal
Jupiter's true nature.
NASA's Jet Propulsion Laboratory, Pasadena, Calif., manages the Juno
mission for the principal investigator, Scott Bolton, of Southwest
Research Institute in San Antonio. The Juno mission is part of the New
Frontiers Program managed at NASA's Marshall Space Flight Center in
Huntsville, Ala. Lockheed Martin Space Systems, Denver, built the
spacecraft. JPL is a division of the California Institute of Technology
in Pasadena. More information about Juno is online at http://www.nasa.gov/juno and http://missionjuno.swri.edu .
Friday, February 3, 2012
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