Half-hours with the Telescope

The star μ Cygni lies in a corner of the constellation, rather farther from ζ than ζ from ε Cygni. A line from ε to ζ produced meets κ Pegasi, a fourth-magnitude star; and μ Cygni, a fifth-magnitude star, lies close above κ Pegasi. The distance between the components is about 5½", their magnitudes 5 and 6, their colors white and pale blue.

The star ψ Cygni may next be looked for, but for this a good map of Cygnus will be wanted, as ψ is not pointed to by any well-marked stars. A line from α, parallel to the line joining γ and δ, and about one-third longer than that line, would about mark the position of ψ Cygni. The distance between the components of this double is about 3½", their magnitudes 5½ and 8, their colors white and lilac.

Lastly, the observer may turn to the stars γ₁ and γ₂ Draconis towards the north-west about 40° above the horizon (they are included in the second map of Plate 2). They form a wide double, having equal (fifth-magnitude) components, both grey. (See Plate 5.)