IC 2391
Open star cluster in the constellation Vela
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Through Constellation, Light-year and Earth
Description
IC 2391 is centred about 490 light-years away from Earth and can be seen with the naked eye. It contains about 30 stars with a total visual magnitude of 2.5, spread out across 50 arcminutes.
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Member stars
These are some of the prominent members of IC 2391:
The stars' era of formation is similar to open cluster IC 2602 in neighbouring Carina, and has a lithium depletion boundary age of about 50 million years. The latter group averages about the same distance, placed at about 485 light years away.
Argus Association
The components formed at about the same time as a nearer group, known as the "Argus Association" which one motion model suggests began in their own nebula cloud. These are in a similar direction, roughly the Vela constellation, within the local galactic arm. The supposed association may chiefly comprise: