Some texts from internet:
Quote:
The star as seen from Earth is actually a triple star system, with the primary star (Rigel A) a blue-white supergiant of absolute magnitude −7.84 and around 130,000 times as luminous as the Sun.
Rigel B is itself a spectroscopic binary system, consisting of two main sequence blue-white stars of spectral type B9.
Rigel lights up several dust clouds in its vicinity, most notably the IC 2118 (the Witch Head Nebula)
Rigel is surrounded by a shell of expelled gas. This occurs because when a red giant becomes a blue giant, the slow stellar winds of the former red giant are compressed by the faster winds of the blue giant, therefore creating a shell
Rigel B is separated from its primary by over 2200 AU (12 lightdays)
Rigel B is itself a spectroscopic binary system, consisting of two main sequence stars that orbit their center of gravity every 9.8 days. The stars both belong to the spectral class B9V; Rigel B is the more massive of the pair, at 2.5 versus 1.9 solar masses
RiguelBC
Componente 1 Magnitude: 7.50
Componente 2 Magnitude: 7.60
Separação: 0.1 arc sec
A-BC
Componente 1 Magnitude: 0.30
Componente 2 Magnitude: 6.80
Separação: 9.6 arc sec
The star is only 10 million years old, compared to the sun's 4.5 billion.
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note: 1 sec - ISO 200 - single shot
