Lunar Prospector Status Report #36

June 12, 1998 - 1:00 p.m. EST (10:00 a.m. PST)

On DOYs 159-162 (6/8-11), several commands were sent to examine the cause of the noise on the APS. Preliminary results show that the light leak on Face #5 somehow affects Face #3 (with occaisional impact on Face #4 as >well). The anomaly is still under investigation and the current APS configuration is Faces #1, 2 & 4 are on, Faces #3 & 5 are off. A total of 22 commands were sent.

Current spacecraft state (0000 GMT 6/5/98):

Orbit: 1873
Downlink: 3600 bps
Spin Rate: 11.96 rpm

Spin Axis Attitude (ecliptic):
Latitude: 87.0 deg
Longitude: 132 deg

Trajectory:
Periapsis Alt: 84.7 km
Apoapsis Alt: 132 km

Inclination: 89.9 deg
Period: 118 min
Occultations: none
Eclipses: 211 minutes