Capella (system)

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Capella Aa
Imperiumgrey-2.jpg
Spectral K0 III (G8 III)
Type Giant
Multiple Quaternary (see text)
Luminosity 79 LSol
Absolute magnitude 0.296
Mag Terra 0.08
Temperature 4970° K
Mass 2.57 MSol
Radius 12.0 RSol
Companion Capella Ab
Capella Ab
Imperiumgrey-2.jpg
Spectral G1 III
Type Giant
Multiple Quaternary (see text)
Luminosity 73 LSol
Absolute magnitude 0.167
Mag Terra 0.08
Temperature 5730° K
Mass 2.49 MSol
Radius 8.8 RSol
Companion Capella Aa
Capella Ba (Capella H)
Imperiumgrey-2.jpg
Spectral M2.5 V
Type Main Sequence
Multiple Quaternary (see text)
Luminosity LSol
Absolute magnitude
Mag Terra 0.08
Temperature ° K
Companion Capella Bb (Capella L)
Capella Bb (Capella L)
Imperiumgrey-2.jpg
Spectral M4 V
Type Main Sequence
Multiple Quaternary (see text)
Luminosity LSol
Absolute magnitude
Mag Terra 0.08
Temperature ° K
Companion Capella Ba (Capella H)

The star Capella (otherwise known as Alpha Aurigae) is a quaternary star system composed of two binary pairs. Capella is a member of the Hyades Moving Group.

Description[edit]

Capella is a quaternary star system composed of two binary pairs.

The Capella A pair is composed of two yellow-orange giant stars Capella Aa (a K0 III star whose corona is an x-ray emission source) and Capella Ab (a slightly less massive G1 III star). They are separated from one another by 0.76AU and are characterized by an orbital period of about 104 days about one another. The Capella A system has been classified as an RS Canum Venaticorum type variable.

The Capella B pair lies approximately 10,000AU from Capella A, and is composed of two pinkish-orange "red dwarf" main sequence stars called Capella Ba (also known as "Capella H") and Capella Bb (also known as "Capella L") that orbit each other approximately once every 400 years.

The Capella star system lies approximately 13.1pc from Terra, and is located in a Rimspinward/Spinward direction from Terra at bearing 162.6o Galactic Longitude and +04.6o North Galactic Latitude.

History and Background[edit]

Capella is the primary star of the world Capella (Solomani Rim 1440).

Image Repository[edit]

TravellerMap (T5SS):
[1]

References and Contributors[edit]

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