|alpha Serpentis||Unukalhai||magn. 2,7||RA: 15h 44m 16.07s||Dec: +06° 25' 32.2"|
|eta Serpentis||magn. 3,4||RA: 18h 21m 18.67s||Dec: -02° 53' 54.1"|
|Description||Serpens has a peculiarity that distinguishes it from all the other constellation: even if it is only one constellation, it is divided into two distinct portions, separated by Ophiuchus: in the west there is the snake's head, Serpens Caput, the greatest and most evident part; in the east the there is the tail, Serpens Cauda.
There are some interesting double stars, all separable with small telescopes: they are, in particular, beta, delta, theta and ny Serpentis. Remarkable is also a stellar cluster, M16 (on the left), near the border with Scutum: it is composed by about fifty stars, surrounded by a weak nebulosity known as Eagle Nebula.
|The constellation represents the snake that Ophiuchus holds in its hands.|