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8. Commission de l’Astronomie Méridienne

  • Frank Dyson (a1), MM. Aiginitis, Armellini, Bemporad, Boss, Camera, de Sitter, Dneprovsky, Dodwell, Fayet, Gonnessiat, Gyllenberg, Hins, Jackson, Jeffers, Jones, Kopff, A. Lambert, Moreau, Morgan, Oom, Perrine, Stewart and Zimmer...

Extract

Since the last meeting of the International Astronomical Union, much attention has been given both in Germany and America to the systematic errors of the fundamental catalogues of Boss and Auwers. This is of special importance if the proper motions of any of the stars are to be used in the verification of the rotation in the plane of the Milky Way. The periodic errors in the proper motions, both in right ascension and declination, are of significance in this connection, while the motion of the equinox is required for the determination of precession, and the systematic correction to the proper motions of declination affects the position of the Solar Apex and the Vertices of the Star Streams.

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