Cygnus, the northernmost of the September constellations represents the Swan The constellation is too very easy to identify because is it dominated by a large cross-shaped asterism known as the Northern Cross, formed by the stars Deneb (Alpha Cygni), Sadr (Gamma Cygni), Albireo (Beta Cygni), Rukh (Delta Cygni) and Gienah (Epsilon Cygni).
Cygnus, the northernmost of the September constellations, represents the Swan. The constellation is very easy to identify because is it dominated by a large cross-shaped asterism known as the Northern Cross, formed by the stars Deneb (Alpha Cygni), Sadr (Gamma Cygni), Albireo (Beta Cygni), Rukh (Delta Cygni) and Gienah (Epsilon Cygni).