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Lunar Prospector Status Report #19

February 9, 1998 - 7:00 p.m. EST (4:00 p.m. PST)

This past week, no anomalies surfaced with regard to the spacecraft or its instruments, and no commanding activities were performed. During the afternoon (PST), Feb. 9, 1998, Mission Control executed a small re-orientiation maneuver. According to mission controllers at Ames, thermal constraints made this maneuver necessary to re-position the orientation of the spacecraft's spin axis so that the Sun angle is pointing slightly toward the top of the vehicle.

The Lunar Prospector spacecraft continues to perform very well according to Mission Control at NASA's Ames Research Center. The current state of the vehicle (as of 4:00 p.m. (PST) on Mon., Feb. 9, 1998), according to Mission Operations Manager Marcie Smith, is as follows:

Orbit Number: 345
Data Downlink Rate: 3600 bps
Spacecraft Spin Rate: 11.94 rpm
Spin Axis Attitude: Longitude: 242 deg
Latitude: 88.4 deg
Trajectory: Periselene: 92 km
Aposelene: 109 km
Period: 118 minutes duration
Occultations: 46 minutes duration
Inclination: none
Eclipses: 39 minutes duration

Alison Davis
Lunar Prospector Mission Office
NASA Ames Research Center
Moffett Field, Calif. 94035