A handbook of double stars, with a catalogue of twelve hundred double stars and extensive lists of measures. With additional notes bringing the measures up to 1879 (1879)
that this orbit cannot be elliptical. Taking the early observations into account, the companion has described about 80°, and yet has scarcely deviated from a rectilinear path. It is almost certain that the relative path is of a hyperbolic nature. It is given approximately, so far as at present… … Let the equation be written Fig. 16.
