Castor (SR 2339) (system)

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Castor Aa
Imperiumgrey-2.jpg
Spectral A1.5 IV/V
Type Main Sequence/
Subgiant
Multiple Sextenary (See Text)
Luminosity LSol
Absolute magnitude +0.986
Mag Terra 1.93
Temperature 10,280° K
Mass 2.7 MSol
Radius 2.4 RSol
Companion Castor Ab (See Text)
Castor Ab
Imperiumgrey-2.jpg
Spectral M1 Ve
Type Main Sequence
Multiple Sextenary (See Text)
Luminosity LSol
Absolute magnitude
Temperature ° K
Mass < 0.5 MSol
Companion Castor Aa (See Text)
Castor Ba
Imperiumgrey-2.jpg
Spectral A1 IV/Vm
Type Main Sequence/
Subgiant
Multiple Sextenary (See Text)
Luminosity LSol
Absolute magnitude +1.886
Mag Terra 2.97
Temperature 8840° K
Mass 2.98 MSol
Radius 3.3 RSol
Companion Castor Bb (See Text)
Castor Bb
Imperiumgrey-2.jpg
Spectral M1 Ve
Type Main Sequence
Multiple Sextenary (See Text)
Luminosity LSol
Absolute magnitude
Temperature ° K
Mass < 0.5 MSol
Companion Castor Ba (See Text)
Castor Ca (YY Geminorum)
Imperiumgrey-2.jpg
Spectral M0.5 Ve
Type Main Sequence
Multiple Sextenary (See Text)
Luminosity 0.0733 LSol
Absolute magnitude +8.950
Mag Terra 9.83
Temperature 3820° K
Mass 0.5992 MSol
Radius 0.6191 RSol
Companion Castor Cb (See Text)
Castor Cb (YY Geminorum)
Imperiumgrey-2.jpg
Spectral M0.5 Ve
Type Main Sequence
Multiple Sextenary (See Text)
Luminosity 0.0733 LSol
Absolute magnitude +8.950
Mag Terra 9.83
Temperature 3820° K
Mass 0.5992 MSol
Radius 0.6191 RSol
Companion Castor Ca (See Text)

The star Castor (otherwise known as Alpha Geminorum) is a sextenary star system which (along with the star Pollux) represent the two "twins" comprising the Terran-sky constellation of Gemini.

Description[edit]

The Castor star system is a sextuple system of stars comprised of three separate binary pairs.

  • Castor A is comprised of a blue-white early subgiant star (Castor Aa) orbited by a pinkish-orange "red dwarf" main sequence star (Castor Ab). They orbit each other with a period of 9.213 days and an orbital eccentricity of e=0.5.
  • Castor B is comprised of a blue-white early subgiant star (Castor Ba) orbited by a pinkish-orange "red dwarf" main sequence star (Castor Bb). They orbit each other with a period of 2.93 days.
  • Castor C (otherwise known as the BY Draconis variable type star YY Gemninorum) orbits the Castor A/B pair with a period of about 14000 years. It is comprised of two nearly identical pinkish-orange "red dwarf" main sequence stars (Castor Ca and Castor Cb) that orbit each other once every 0.814 days.

The Castor star system lies approximately 15.6pc from Terra, and is located in a Rimward/Rimspinward direction from Terra at bearing 187.4o Galactic Longitude and +22.5o North Galactic Latitude.

History & Background (Dossier)[edit]

Castor is the primary star of the beltworld Castor/Gemini (Solomani Rim 2339).

Image Repository[edit]

TravellerMap (T5SS):
[1]


References & Contributors (Sources)[edit]

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