Gacrux

Gamma Crucis

Proper NameGacrux
Bayer DesignationGamma Crucis
Flamsteed NumberNone
BSC4763
HD108903
ConstellationCrux
Right Ascension12h 31m 9s
Declination-57° 6' 46"
Distance88 light years
27 parsecs
MagnitudeApparent: +1.6 to +1.7
Absolute: -0.6 to -0.5
Spectral ClassM4 Red Giant
Optimum VisibilityMarch/April
Relative Galactic Position of Gacrux

The Galactic position and direction of Gacrux relative to Earth's Sun. Note that, at this extreme scale, the two stars are effectively in the same place.

The crowning star of the Southern Cross is Gacrux or Gamma Crucis, 88 light years (27 parsecs) from Earth. This is a red giant star, indicating that it is reaching the end of its stellar lifespan. It is a binary (that is, it has an less luminous and smaller companion star), and is also variable - its brightness changes over time.

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