NGC 2362, also known as the Tau Canis Majoris cluster, is an open
cluster in the constellation Canis Major.
It may be less than 5 million years old1 and is still associated
with nebulosity – the remains of the gas cloud from which it formed.
NGC 2362 contains about 60 stars and has a total mass of at least 500 solar
masses. The brightest star in the cluster is the O
star Tau Canis Majoris, a luminous supergiant of spectral type O8, visual
magnitude 4.39, and absolute magnitude -7 (equivalent to about 50,000 solar
luminosities). As Tau CMa is the brighter component of a spectroscopic binary,
its mass has been quite well determined at 40 to 50 solar masses. Dynamical
studies of NGC 2362 suggest that it will survive longer before breaking
up than will the Pleiades but not as long
as the Hyades.
|NGC 2362. North is up.
Credit and copyright: J.
NGC 2362 was first seen by Giovanni Hodierna in 1654 and rediscovered William Herschel in 1783.
||5,000 light-years (1,500 pc)
||R.A. 07h 18.6m, Dec. -24° 59'
||C 0716-248, OCISM 127, OCl 633
- Dahm, S. E. "The Young Cluster NGC 2362". The Astronomical Journal, 130, 1805-1828 (2005).
AND STAR CLUSTERS