Lunar Prospector Status Report #91

July 16 , 1999 - 1:00 p.m. EST (10:00 a.m. PST)

The Lunar Prospector spacecraft continues to collect good science data in
the extended mission orbit. Four of five science instruments are on: the
Gamma Ray Spectrometer (GRS), the Neutron Spectrometer (NS), the
Magnetometer (MAG), and the Electron Reflectometer (ER). Data continues to
be collected for the Doppler Gravity Experiment (DGE) as well.

There was no commanding this week.

Current spacecraft state (0000 GMT 7/16/99, DOY 197)

Orbit: 6860
Downlink: 3600 bps
Spin Rate: 12.12 rpm

Spin Axis Attitude (ecliptic):
Latitude<: -88.5 deg
Longitude: 048 deg

Trajectory:
Periapsis Alt: 19.4 km
Apoapsis Alt: 40.6 km
Period: 111 min

Occultations: 47 minutes
Eclipses: none
>Propellant Remaining: 9.51 kg

Eclipses begin to occur once each orbit later today.