Deneb is a first-magnitude star in the constellation of Cygnus, the swan. It is one of the vertices of the asterism known as the Summer Triangle and the “head” of the Northern Cross. It is the brightest star in Cygnus and the 19th brightest star in the night sky, with an average apparent magnitude of +1.25. This area lies in the plane of the Milky Way and is very rich in emission nebulae. Right down you can see NGC 7000/The North America Nebula, IC 5067/The Pelican Nebula, NGC 6989 an open cluster, 57 Cygni, IC 5068. Just a bit below left to Deneb is 55 Cygni and at the bottom left is IC 5076.

Deneb (/ˈdɛnɛb/) is a first-magnitude star in the constellation of Cygnus, the swan. Deneb is one of the vertices of the asterism known as the Summer Triangle and the “head” of the Northern Cross. It is the brightest star in Cygnus and the 19th brightest star in the night sky, with an average apparent magnitude of +1.25. A blue-white supergiant, Deneb rivals Rigel as the most luminous first-magnitude star. However, its distance, and hence luminosity, is poorly known; its luminosity is somewhere between 55,000 and 196,000 times that of the Sun. Its Bayer designation is α Cygni, which is Latinised to Alpha Cygni, abbreviated to Alpha Cyg or α Cyg.