Rigel (star)

Rigel A
Spectral	B8 Iae
Type	Supergiant
Luminosity	1.2 x 105 LSol LSol
Absolute magnitude	-7.84
Mag Terra	0.13
Temperature	12,100 K° K
Mass	23 MSol MSol
Radius	78.9 RSol RSol
Companion	Rigel BC

Rigel Ba
Spectral	B9 V
Type	Main Sequence
Luminosity	LSol
Absolute magnitude
Mag Terra	7.6
Temperature	~12,000 K° K
Mass	3.84 MSol MSol
Companion	Rigel Bb / Rigel C / Rigel A

Rigel Bb
Spectral	B9 V
Type	Main Sequence
Luminosity	LSol
Absolute magnitude
Mag Terra	7.6
Temperature	~12,000 K° K
Mass	2.94 MSol MSol
Companion	Rigel Ba / Rigel C / Rigel A

Rigel C
Spectral	B9 V
Type	Main Sequence
Luminosity	LSol
Absolute magnitude
Mag Terra	7.6
Temperature	~12,000 K° K
Mass	3-4 MSol MSol
Companion	Rigel B / Rigel A

Rigel D
Spectral	K? V
Type	Main Sequence
Luminosity	LSol
Absolute magnitude
Mag Terra	15
Temperature	° K
Companion	Rigel ABC

The star Rigel (otherwise known as Beta Orionis) is a quinary star system whose principal component (Rigel A) is a blue supergiant star of spectral type B8 Iae classified as an Alpha Cygni type variable star.

• It is an outlying member of the Orion OB-1 Association.

Description (Specifications)

Rigel is a quinary star system composed of a supergiant primary Rigel A with an orbiting trinary system Rigel BC.

• Rigel A is a blue supergiant Alpha Cygni type variable star of spectral type B8 Iae.
• Rigel BC is a trinary system composed of two blue B9 V main sequence stars (Rigel Ba and Rigel Bb) in close orbit about one another, accompanied by an additional B9 V companion (Rigel C).

• Rigel BC is separated from from Rigel A by ~2200AU, and Rigel BC has an orbital period of ~18,000 years about Rigel A.
• Rigel B and Rigel C have an orbital period of ~63 years about one another.
• Rigel B is itself a binary system consisting of two B9 V type main sequence stars (Rigel Ba and Rigel Bb) that orbit each other every ~9.86 days.

• There is a class K main sequence dwarf (Rigel D), which also belongs to the system. At a separation of ~11,500AU, Rigel D takes ~250,000 years to orbit the Rigel ABC inner system.

The Rigel star system lies approximately 264.6pc from Terra, and is located in a Rimward direction from Terra at bearing 209.2^o Galactic Longitude and -25.2^o South Galactic Latitude.

History & Background (Dossier)

Rigel forms one of the feet of the Terran-sky constellation of Orion, one of the few constellations that is marginally recognizable throughout Charted Space.

References & Contributors (Sources)

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