Rigel is the brightest star in the constellation Orion. it is a blue supergiant star with several dimmer companions. Rigel is sometimes called Algebar or Elgebar in older astronomical sources. Rigel is the seventh brightest star in the night sky and is occasionally outshone by the second brightest star in Orion, Betelgeuse. Like other supergiant stars, Rigel will probably explode in a supernova leaving a neutron star or black hole remnant.
Astronomical data
Radius (in Solar Radii): 74.1 R☉
Diameter (in Kilometers): 103,147,200 km
Mass (in Solar Masses): 21 M☉
Distance (in Light Years): 848 ly
Spectral type: B8 Ia (Blue)