variable star in the constellation Cygnus
P Cygni is a blue supergiant star located in the constellation Cygnus. It is 76 times larger than the Sun and 30 times more massive. P Cygni is a luminous blue variable (or LBV for short) star, maybe even the first one discovered.
- Najarro, F. (1 June 2001). "Spectroscopy of P Cygni". p. 133 – via NASA ADS.