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Lunar Prospector Status Report #28

April 16, 1998 - 1:00 p.m. EST (10:00 a.m. PST)

The Lunar Prospector spacecraft continues to perform well and all instruments continue to collect good data.

The attitude data has been reprocessed, verifying that the last two maneuvers have executed as planned. The reason for the conflicting attitude data was that the effects of gravity gradient on the attitude had not been accounted for. The attitude model is being updated to include that effect. The next attitude reorientation is scheduled for 4/27.

Current spacecraft state (00:00 4/16/98 GMT):

Orbit: 1139
Downlink: 3600 bps
Spin Rate: 11.96 rpm

Spin Axis Attitude (ecliptic):
Latitude: 83 deg
Longitude: 125 deg

Trajectory:
Periselene Alt: 87.6 km
Aposelene Alt: 110.9 km
Period: 118 minutes

Occultations: 35 minutes
Eclipses: 46 minutes