Cygnus covers just over 800 square degrees of the northern sky.
More than 10 stars are visible in an amateur instrument in this cluster, of similar size to Dolidze 9 at 7 arcminutes in diameter, whose brightest star is of magnitude 7.
The secondary, 30 Cygni, appears blue-green.
At all events, its present figuring did not originate with the Greeks, for the history of the constellation had been entirely lost to them, as had that of the mysterious Engonasin , — an evident proof that they were not the inventors of at least some of the star-groups attributed to them.
The lyre is represented by the neighbouring.
The brighter star of Albireo or Beta Cygni is magnitude 3.