IC 4665 is a cluster of about thirty stars that began to
develop less than forty million years ago, lying about 1,400 light years from
Earth in the constellation of
Ophiuchus. By comparison with most star clusters,
these figures make it very young and - relatively speaking - nearby. The cluster
is just visible to the naked eye, as a faint point of light somewhat to the south of Ras Alhague.