4.82
Apparent Mag6,000
Distance (ly)B1Ia+
Spectral Type18,700
Temperature (K)P Cygni is a luminous blue variable star that gave its name to a type of spectral line profile seen in stars with strong stellar winds.
Stellar Data
Apparent Magnitude4.82
Absolute Magnitude-7.9
Distance6,000 light-years
Spectral TypeB1Ia+
Temperature18,700 K
Luminosity610,000 L☉
Radius76 R☉
Mass30 M☉
Right Ascension20h 17m 47.2s
Declination+38° 01′ 58.5″
ConstellationCygnus
Notable Facts
- P Cygni defines a type of spectral line profile indicating mass loss
- It appeared as a third-magnitude star in 1600 before fading
- The star has slowly brightened over the past 400 years