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Epsilon Aurigae

The young pre-main-sequence star eclipses every 27 years for the duration of nearly 2 years. During this time only half of the light from it reaches us.
Such an eclipse can't be caused by one single star. It is suspected that Epsilon Aurigae is orbited by two companions which are lying in a huge dust disk.

Constellation: Auriga
Distance: 3300 light-years
Spectral class: F0
Visual magnitude: 3.04
Luminosity: 60 000 * Sun
Mass: 15 * Sun
Diameter: 175 * Sun

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    Epsilon Aurigae
Photo: ESO Online Digitized Sky Survey

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