1968•Publications of the Astronomical Society of the PacificOpen access

Visual Observations of the Lunar Libration Clouds and an Observing Ephemeris

Walter J Krumm

Abstract

NOTES FROM OBSERVATORIESsured on Yale plates taken some 20 years later than the Cape plates.From a comparison of the two positions a provisional proper motion of +0*0069 in a, +0Y006 in 8, or a total annual proper motion of 07081 dt 07018 is inferred.This marginal value would not preclude the identification of the star as a white dwarf.

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Key concepts: Ephemeris, Libration (molecule), Astrobiology, Geology, Astronomy, Geodesy, Physics, Geometry