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Theta Carinae

This blue star lies in the open cluster IC 2602. Admittedly it is only a few million years old, much younger than the cluster with its 34 million years. However, it is behind the expected evolution for a star of this age and mass. Maybe Theta Carinae wasn't always this large and is really a blue straggler.

Constellation: Carina
Distance: 439 light-years
Spectral class: B0Vp
Visual magnitude: 2.74
Luminosity: circa 20 000 * Sun
Mass: 14 * Sun
Diameter: 5 * Sun

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    Theta Carinae
Theta Carinae and IC 2602
Photo: ESO Online Digitized Sky Survey

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