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Alnilam

Alnilam or Epsilon Orionis is a blue star. The central belt star of Orion is the most distant, but brightest of the three. It is at the end of its existance as a main sequence star and will soon evolve to a red supergiant. Then it will outshine Betelgeuse.

Constellation: Orion
Age: 4 million years
Distance: ca. 1340 light-years
Spectral class: B0
Visual magnitude: 1.69
Luminosity: 250 000 * Sun
Mass: 40 * Sun

Back: List of big and giant stars 		    Alnilam
To the left is Alnilam. Right below it and next to the Horsehead Nebula is Alnitak. In the upper right ist the Orion Nebula.
Photo: Robert Gendler
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