✦ LIBER ✦

Photometric Observations of the Satellites of Mars

✍ Scribed by Edward C. Pickering

Publisher: John Wiley and Sons
Year: 1882
Tongue: English
Weight: 175 KB
Volume: 102
Category: Article
ISSN: 0004-6337
DOI: 10.1002/asna.18821021302

No coin nor oath required. For personal study only.

✦ Synopsis

The following observatians were made by Mr. 0. C. reading of the photometer, the corresponding difference in Wendell and myself, with the photometer described under magnitude between Mars and the satellite, the average dethe name of Photometer I in Vol. XI of the Annals of the Observatory, attached to the fifteen-inch equatorial. In order to avoid any error which might have resulted from differences in the position of the photometer, it was always placed with the auxiliary prism and telescope to the left of the observer. Accordingly the image of Mars in the large telescope could not always be concealed behind the reflecting prism in which appeared the image of the object used as the standard of comparison. In such cases, Mars was brought behind a piece of wax attached to a glassplate in the eye-piece.

The successive columns of the subjoined list of observations contain a number for reference, the date, the hour in Cambridge mean time, the name of the object seen in the auxiliary telescope and employed as a standard of comparison, the elongation near which the satellite was ob-

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