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Observations of the Satellites of Mars, made at the Harvard College Observatory

✍ Scribed by Edward C. Pickering

Publisher: John Wiley and Sons
Year: 1880
Tongue: English
Weight: 479 KB
Volume: 97
Category: Article
ISSN: 0004-6337
DOI: 10.1002/asna.18800970804

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✦ Synopsis

P 15 h 11 z e i g e , betreffend die Merausgabe cler Astroiiorriischen Xaehrichten. Die geehrten Herren Mitarbeiter der Astronomischen Nachrichten werden in Folge des Todes des bisherigen Herausgebers dieser Zeitschrift gebeten , ihre Zusendungen in derselben Weise wie fruher entweder an die Redaction der Astronomischen Nachrichten oder an den jetzigen Iicrausgeber, Ilr, 6. 1;. W. 1 ' e t e r s , Kiel, Sternwarte, sehr gefalligst zu richten Obserrations of the Satellites of' Mars, made a t tlie IIarvarcl. College Observatory. By i7;iddzuurcl C. Pickcring Tile following observations '1vcre made with the large Nerz Equatorial of the Harvard College Observatory. Its aperture is 38 crns. (15 inches) and its focal lerigth 683 cnis, (22.5 feet).

B filar micrometer was prepared for the measurements by replacing its fixed thread by two parallel spider lines obout 1 2 ' apart, and its morablc thread by two platinum wires: also 12' apart and having a diameter of about .cJI crns., which was equivalent t o 3". The magnifying power employed was 350, and the diameter of the field about 5'. Part of it was corered by

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