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Alhena

Aleena, Almeisan, Gamma Geminorum, 24 Geminorum

Proper NamesAlhena, Aleena, Almeisan
Bayer DesignationGamma Geminorum
Flamsteed Number24 Geminorum
HR (BSC)2421
HD47105
ConstellationGemini
Right Ascension6h 38m 36s
Declination+16° 22' 56"
Distance105 light years
32 parsecs
MagnitudeApparent: +1.9
Absolute: -0.6
Spectral ClassA0 White Subgiant
Optimum VisibilityJanuary
Alhena

Alhena B is a yellow dwarf star similar in many ways to the Sun. It orbits the main white subgiant Alhena A following a highly eccentric path taking nearly thirteen years to complete. Alhena A is seen here in the distance, though in fact the white star is the larger and more luminous of the binary pair.

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