NASA Spacecraft Burns for Another Comet Flyby

Eighty-six days out from its appointment with a comet, NASA's Stardust
spacecraft fired its thrusters to help refine its flight path. The Stardust-NExT mission will fly
past comet Tempel 1 next Valentine's Day (Feb. 14, 2011). It will perform NASA's second comet flyby within four months.

"One comet down, one to go," said Tim Larson, project manager for both the Stardust-NExT mission and the EPOXI mission -- which successfully flew past comet Hartley 2 on Nov. 4.

The trajectory correction maneuver, which adjusts the spacecraft's flight path, began at 2 p.m. EST (11:00 a.m. PST) on Nov. 20. The Stardust spacecraft's rockets fired for 9 seconds, consumed about 41 grams (1.4 ounces) of fuel and changed the spacecraft's speed by all of 0.33 meters per second (about 0.7 miles per hour). The maneuver was designed to target a point in space 200 kilometers (124 miles) from comet Tempel 1.

Launched on Feb. 7, 1999, Stardust became the first spacecraft in history to collect samples
from a comet (comet Wild 2), and return them to Earth for study. While its sample return capsule parachuted to Earth in January 2006, mission controllers were placing the still viable spacecraft on a path that would allow NASA the opportunity to re-use the already-proven flight system if a target of opportunity presented itself. In January 2007, NASA re-christened the mission "Stardust-NExT" (New Exploration of Tempel), and the Stardust team began a four-and-a-half year journey for the spacecraft to comet Tempel 1. This will be the second exploration of Tempel 1 by a spacecraft (Deep Impact).

Along with the high-resolution images of the comet's surface, Stardust-NExT will also measure
the composition, size distribution and flux of dust emitted into the coma, and provide
important new information on how Jupiter family comets evolve and how they formed 4.6 billion years ago.

Stardust-NExT is a low-cost mission that will expand the investigation of comet Tempel 1
initiated by NASA's Deep Impact spacecraft. JPL, a division of the California Institute of
Technology in Pasadena, manages Stardust-NExT for the NASA Science Mission Directorate,
Washington, D.C. Joe Veverka of Cornell University, Ithaca, N.Y., is the mission's principal
investigator. Lockheed Martin Space Systems, Denver, built the spacecraft and manages
day-to-day mission operations.

For more information visit http://www.jpl.nasa.gov/news/news.cfm?release=2010-390