Cartography of the marginal zones of the moon

Astronomy and Astrophysics – Astronomy

Scientific paper

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Hypsography, Lunar Limb, Lunar Maps, Planetary Mapping, Selenography, Astronomical Photometry, Histories, Libration, Lunar Occultation, Lunar Photography, Margins

Scientific paper

Historical developments in the hypsometric cartography of the marginal zones of the moon are reviewed. The first description of the lunar limb was given by Hayn in 1904, using a wire micrometer to measure lunar photographs. Points were measured in relation to a reference circle drawn through 45 regularly spaced limb points. Hayn's hypsometric maps were widely employed until 1952 when an atlas of lunar profiles for all paired and whole longitudinal and latitudinal librations was compiled by the author. Hypsometric maps published by Nefediev in 1958 were obtained by heliometric measurements and were based on a barycentric sphere as a reference surface. Watts in 1963 presented lunar profiles obtained by photoelectric means with a reference surface determined by profiles measured at the times of three librations. Watts' maps are presently considered the most complete.

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