Butterfly Cluster (M6, NGC 6405)
An open cluster in the
constellation Scorpius, 4° northwest of
M7 (Ptolemy's Cluter), that contains
about 80 stars roughly in the shape of a butterfly. Visible to the naked
eye, it was first noted by Giovanni Hodierna
before 1654. Its most conspicuous star is an orange giant K
star of magnitude 6.2.
| Credit: AURA, NOAO, NSF
||about 50 million years
||R.A.17h 40.1m, Dec. -32° 13'
AND STAR CLUSTERS