Catalogue Of Stars Within Two Degrees Of The North Pole Deduced From Photographic Measures Made At Vassar College Observatory (1905) - Tapa blanda

Furness, Caroline Ellen; Adams, Frank D; Coker, Ernest G

9781436799102: Catalogue Of Stars Within Two Degrees Of The North Pole Deduced From Photographic Measures Made At Vassar College Observatory (1905)

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ISBN 10: 1436799104 ISBN 13: 9781436799102

Editorial: Kessinger Publishing, 2008

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Otf STARS WITHIN TABLE I. D. Donner. Dr. Dreyer. II. MEASUREMENT AND REDUCTION; PRELIMINARY CATALOGUE. After some trial it seemed advisable to use both vertical and horizontal threads in measuring the rectangular coordinates of the star images. Thus both the Xand Ycoordinates were determined in the same position of the plate. It was also decided to set upon both corners of the reseau square at once, thus reducing greatly the number of micrometer readings. It was not possible to set upon the lines as is customary, since for the most part they were too indistinct. Otherwise the method of measuring and recording is the same as that described in Publication i, Sec. II and III. Six plates were measured by Dr. Furness and two by Miss BH se Whitney. The coordinates of the standard stars were measured by both observers. Corrections were made for errors of the screw, for the reseau and for error of runs. Table II which follows contains the corrected coordinates of the two sets of images measured on each 89 plate. It also contains the coordinates of certain stars on the 90 plates which have a polar distance greater than i and hence are not included in the catalogue of sixty-five stars found in Publication
(Typographical errors above are due to OCR software and don't occur in the book.)

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