A general catalogue of double stars within 121⁰ of the north pole (1906)
Burnham, S. W. (Sherburne Wesley), 1838-1921 · [Washington] Carnegie Institute of Washington · leaf 742
e to a small difference in the proper motions ofthe components. The probabilities, however, are that thechange is due to orbital motion. The following measures, which are shown on Fig. 2, aresufficient to illustrate the movement during the last eightyyears: 1781.28 i8?4 4 56 4« M 1825.73 359.8 3 60… … 2_l 3_J_ 1 J Aquarii. f>g-. (reproduced from Popular Astronomy, IV, 474). The smallellipse, which is an impossible orbit, is merely to show that thisshort arc can be equally well represented by an almost infinitevariety of curves, and that therefore we know absolutely nothingat this time of the…
Stars · Double stars
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