ALBANY ZONE CATALOGUES FOR THE EPOCH 1900 PREPARED AT THE DUDLEY OBSERVATORY PDF Download
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Author: Dudley Observatory
Publisher:
ISBN:
Category : Stars
Languages : en
Pages : 294
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Author: Dudley Observatory
Publisher:
ISBN:
Category : Stars
Languages : en
Pages : 294
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Book Description
Author: Dudley observatory
Publisher:
ISBN:
Category :
Languages : en
Pages : 249
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Author: Lewis Boss
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Dudley Observatory
Publisher:
ISBN:
Category : Stars
Languages : en
Pages : 249
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Author: Lewis Boss
Publisher: Forgotten Books
ISBN: 9780331976441
Category : Science
Languages : en
Pages : 284
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Excerpt from Albany Zone Catalogues for the Epoch 1900, Prepared at the Dudley Observatory, Albany, New York: Catalogue of 8276 Stars Between 20 and 41 of South Declination; Catalogue of 2800 Stars Between 2 of South and 1 of North Declination; Catalogues Containing Standard Stars and Miscellaneous Star Positions The instrument known as the Olcott Meridian Circle was described in the first volume of the Annals of the Dudley Observatory and again in the introduction to the Albany Astronomische Gesellschaft Zone for I 87 5. Since then the instrument has been removed to a new location and housed in a metal building with wooden louvre-work to protect it from the sun. A description of the building, together with incidental changes in the construction Of the instrument, is given in Astro nomical Journal N O. 334. Besides the insertion of new transit and zenith distance threads, an important change in the microscopes was made. They were shortened and provided with new Objectives which increased their effective magnifying power from 2 2 to 36 diameters, greatly increasing the ease and precision with which the readings can be made. Several times between the remountin g of the instrument and the completion of the Observations forming this catalogue, there was trouble from lint and other material lodging in the reticule. Often it could be removed without injury to the threads, but too frequently they had to be reset. They needed some replacements at the outset in January I 896, but rather than make the attempt at that season Dr. Boss used, until April I 6, those threads that were still in good condition. There were eleven available, and their approximate intervals on each side of the central thread were 2091, 1796, 1590, 799, and 590. Transits, except of close circumpolar stars, were usually taken with the aid of the chronograph over the I I threads and the mean of the I I threads was used as the zero of reference. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Lewis Boss
Publisher:
ISBN: 9780598344793
Category :
Languages : en
Pages : 277
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Author: Carnegie Institution of Washington. Department of Meridian Astrometry
Publisher:
ISBN:
Category : Stars
Languages : en
Pages : 249
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Author: Arthur J. Roy
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Arthur J. Roy
Publisher:
ISBN:
Category : Stars
Languages : en
Pages : 249
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Book Description
Author: Carnegie Institution of Washington. Department of Meridian Astrometry
Publisher:
ISBN:
Category : Stars
Languages : en
Pages : 294
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