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Gegenschein from Lunar Orbit

NSSDCA ID: 1971-063A-07

Mission Name: Apollo 15 Command and Service Module (CSM)
Principal Investigator:Dr. Lawrence Dunkelman


This experiment was designed to photograph the reflection from dust particles at the Moulton point to determine the contribution of such reflections to the gegenschein. A 35-mm Nikon camera with a 55-mm lens was used. Photographs were taken in the direction of the Moulton point, in the antisolar direction, and midway between the Moulton point and the antisolar direction, when the spacecraft was in total darkness in lunar orbit. Due to aiming errors, this experiment did not yield any data.

Alternate Names

  • Apollo15CSM/GegenscheinfromLunarOrbit
  • S-178
  • S211


  • Astronomy: Visible

Additional Information

Questions and comments about this experiment can be directed to: Dr. David R. Williams



NameRoleOriginal AffiliationE-mail
Mr. Sam N. Hardee, Jr.General ContactNASA Johnson Space Center
Dr. Lawrence DunkelmanPrincipal InvestigatorNASA Goddard Space Flight Center
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