Open Access

Lunar albedo at hydrogen Lyman α by the NOZOMI/UVS

  • M. Taguchi1Email author,
  • G. Funabashi2,
  • S. Watanabe3,
  • Y. Takahashi2 and
  • H. Fukunishi2
Earth, Planets and Space201452:BF03351673

DOI: 10.1186/BF03351673

Received: 14 July 2000

Accepted: 20 September 2000

Published: 20 June 2014


The geometric albedo of the Moon at the wavelength of hydrogen Lyman α (HLyα 121.6 nm) was derived from an imaging observation by the ultraviolet imaging spectrometer (UVS) during the lunar encounter of the NOZOMI spacecraft. The solar HLyα irradiance data measured by the UARS/SOLSTICE at the time of UVS observation were adopted. We obtained an average geometric albedo of 5.2 ± 0.9% for the sunlit region where the UVS observed. Our result agrees with the geometric albedos obtained from the observations by Apollo 17 and Astro-2/HUT, though the observation geometry and area are completely different from each other. There exists a significant difference of the albedos from place to place in the observed lunar surface ranging from 2.3 ± 1.1% to 6.0 ± 1.0%. It is noted that the observed contrast at the FUV wavelength is positive to that seen in the visible region.