Mel 22 / OCL 180
OC (Open Clusters)
03h 47m 00s
+24Â° 07â€² 00â€³
12 ly in space
78 million years
Notes – Messier 45
-Â M45, Melotte 22 (Mel 22), OCL 180, also the Seven Sisters or Pleiades.
-Â most people see no more than six stars but those with exceptional vision can count from 11 to 18.
-Â the brightest star being mag -2.9 – Alcyone (Î· Tau).
-Â surrounded by the extremely large and faint Merope Nebula (IC349), which is visible telescopically under very dark skies but more easily photographed on blue sensitive film.