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WR 20a

A very big pair of two Wolf-Rayet stars. Both are very unstable, outcast huge masses of gas and interchange it. In maybe one million years the first should explode as supernova.

The pair is part of the young and large star cluster Westerlund 2.

Constellation: Carina
Orbit period of WR 20a A and B: 3.686 days
Age: 2 - 3 million years
Distance: 20 000 light-years
Visual magnitude: 15
Luminosity: 1.15 million * Sun

WR 20a 1

Spectral class: WN6ha
Mass: 83 * Sun
Diameter: 19.3 * Sun
 

WR 20a 2

Spectral class: WN6ha
Mass: 82 * Sun
Diameter: 19.3 * Sun


Back: List of big and giant stars part 2

07/25/2008

    WR 20a
Photo: Harvard-Smithsonian Center for Astrophysics

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