Captain William Henry Smyth
Feb 6, 1832    No. 6 The Crescent, Bedford, England (map)
150mm f/17.6 refractor by Tully 1827

A star with a distant companion, on the left knee of Perseus, and nearly in mid-distance between Mirphak and Capella. A 4½, greenish yellow; B 10, pale blue; the two pointing to some others at a distance in the sp quadrant. It was recorded by ♅. in August, 1780, but with-out other measures than an estimated distance; but his son applied the micrometer, and gained this result:

Pos. 231°12' Dist. 91".56 Ep. 1821.94
[WDS 233° 84".10 2013 ]

Proper motions in space have been detected in μ Persei, of which the following rigorous comparisons afford the best results:

    P....  RA +0".09  Dec. -0".18
    B....     +0".03       -0".06
   [Hipparcos +0".00552    -0".01737]

While this was in the press, I learned that Professor Struve had, with the giant refractor of Poulkova—14.93 inches aperture—detected a most minute acolyte within 12" distance from A.

― A Cycle of Celestial Objects Vol II, The Bedford Catalogue, William Henry Smyth, 1844

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