Albireo – β Cyg


The  classic double star Albireo, image captured on 27th May.

To the naked eye, Albireo in the constellation of Cygnus (Swan) appears as a single point of light, but a telescope shows it to be a binary star. Albireo is some 380 light years away.

Albireo is best known for the striking colour contrast between its two stars, with the brighter star, Albireo A, a red giant and golden in colour whilst Albireo B, the dimmer but hotter star is a contrasting blue.

It is not known whether the two stars are orbiting around each other in a physical binary system.