NGC 4755 is situated just to the east of the bright star beta crucis. It is easily visible to the naked eye under dark skies. It is also situated in a very rich region of the Milky Way. In the photograph above, several other open clusters are visible in addition to NGC 4755. Above NGC 4755 is NGC 4852, while below beta criucis is Cr 262. A short distance to the right of Cr 262 is the very compact cluster NGC 4439. The very dark region on the lower left is part of the dark nebula known as the Coal Sack.
NGC 4755 is a compact and rich cluster with a deep orange star near the centre. The brighter stars form an "A" shape, with numerous fainter stars acting as a backdrop.
Since it is a small cluster, moderate magnification can be used when observing it, which helps darken the sky background, and rendering the view all the more beautiful.
25 minutes exposure, Fuji Super HG V 400 film.
300mm f/6 newtonian at prime focus.
60 second exposure, Kodak High speed ektachrome 160 slide film.
12.5" f/7 newtonian at prime focus.