The open cluster NGC 3766 is a very dense cluster located 5500 ly away in the southern constellation Centaurus. It is visible to the naked eye on a dark night, just next to Crux.
Technical details
OPTICS
10" Newtonian f/5.2
MOUNT
Losmandy G11 equatorial
CAMERA
Philips ToUCam Pro SC1 webcam
FILTERS
None
EXPOSURE
37x30s + 52x30s
DATE/TIME
20/04/2006 10:51 UTC
LOCATION
My backyard observatory in west Auckland, New Zealand