This open cluster, in the constellation Canis Major was discovered by
Giovanni Batista Hodierna before 1653. The brightest star in this
cluster is Tau Canis Majoris.This is a relative young cluster some 4-5
million years old with more than 500 solar masses. If you noticed
a faint red tint, your eyes are not playing tricks on you, hydgren is
present and it is part of a nebula known as Sh2-310.
Date: 10 Feb 12
Images 20-20sec stacked