[Image of Clementine Spacecraft]

Clementine Project Information


Analysis of Clementine Bistatic Radar data has revealed the possibility of a permanent frozen water-ice deposit in a crater near the south pole of the Moon.
Clementine was a joint project between the Strategic Defense Initiative Organization and NASA. The objective of the mission was to test sensors and spacecraft components under extended exposure to the space environment and to make scientific observations of the Moon and the near-Earth asteroid 1620 Geographos. The observations included imaging at various wavelengths including ultraviolet and infrared, laser ranging altimetry, and charged particle measurements. These observations were originally for the purposes of assessing the surface mineralogy of the Moon and Geographos, obtaining lunar altimetry from 60N to 60S latitude, and determining the size, shape, rotational characteristics, surface properties, and cratering statistics of Geographos.

Clementine was launched on 25 January 1994 at 16:34 UTC (12:34 PM EDT) from Vandenburg AFB aboard a Titan IIG rocket. After two Earth flybys, lunar insertion was achieved on February 21. Lunar mapping took place over approximately two months, in two parts. The first part consisted of a 5 hour elliptical polar orbit with a perilune of about 400 km at 28 degrees S latitude. After one month of mapping the orbit was rotated to a perilune of 29 degrees N latitude, where it remained for one more month. This allowed global imaging as well as altimetry coverage from 60 degrees S to 60 degrees N.

After leaving lunar orbit, a malfunction in one of the on-board computers on May 7 at 14:39 UTC (9:39 AM EST) caused a thruster to fire until it had used up all of its fuel, leaving the spacecraft spinning at about 80 RPM with no spin control. This made the planned continuation of the mission, a flyby of the near-Earth asteroid Geographos, impossible. The spacecraft remained in geocentric orbit and continued testing the spacecraft components until the end of mission.

More information on the Clementine mission, instruments, and early results can also be found in the Clementine special issue of Science magazine, Vol. 266, No. 5192, December 1994.


Clementine Flight Plan (1994)

January 25   Launch (16:34 UTC)
February 3   Leave Earth Orbit
February 5   First Earth Flyby
February 15  Second Earth Flyby
February 19  Enter Lunar Orbit
February 26  Start of Systematic Mapping - Cycle 1 (South)
March 26     End of Cycle 1, Start of Cycle 2 (North)
April 21     Completion of Cycle 2
May 5        Exit Lunar Orbit
(May 7        Computer Malfunction (14:39 UTC))
*May          Earth and Lunar Flybys
*June-August  Cruise to Geographos
*August 31    Geographos Flyby

* not accomplished due to malfunction

Clementine Experiments

Ultraviolet/Visible Camera (UV/Vis)
Near-Infrared Camera (NIR)
Long-Wave Infrared Camera (LWIR)
High Resolution Camera (HIRES)
Star Tracker Cameras
Laser Altimeter (LIDAR)
Bistatic Radar Experiment
Gravity Experiment
Charged Particle Telescope (CPT)

Images and Information From Clementine

[Clementine Image of Aristarchus Crater]
Clementine color ratio composite image of Aristarchus Crater

* Clementine CD-ROMs - now available at NSSDC
* Detailed information on Clementine experiments and data - NSSDC Master Catalog
* Clementine to the Moon - more info and images
* Information on the Clementine mission - from the CD-ROMs
* Clementine Images of the Moon - Catalog of Spaceborne Imaging
* More Clementine Images - NSSDC Photo Gallery

* Clementine information at the PDS Imaging Node
* Clementine images at USGS Astrogeology branch, Flagstaff
* Clementine image browser - at the Naval Research Lab Backgrounds Data Center
* Clementine image browser - at CNES (France)
* Clementine raw image CD-ROMs on Jukebox - PDS Imaging Node
* Clementine gravity and topography data - PDS Geophysics Subnode
* Clementine project home page
* Clementine images on FTP - Arizona SEDS chapter
* Clementine at the Naval Research Laboratory
* Lunar and Planetary Institute - including MPEGs of the south pole.

* PDS Imaging Node

* PDS Geosciences Node


* Moon Home Page
* NSSDC Planetary Home Page
Questions and comments about this page should be addressed to:
Dr. David R. Williams, dwilliam@nssdc.gsfc.nasa.gov, (301) 286-1258
NSSDC, Mail Code 633, NASA/Goddard Space Flight Center, Greenbelt, MD 20771
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NASA Official: J. H. King, king@nssdca.gsfc.nasa.gov
Last Updated: 12 September 1997, DRW