Open star cluster M52 in Cassiopeia, shown from a 15-second V-band exposure (obtained an hour into morning twilight by Bill Keel), with a Tektronix 2048x2048 CCD at the prime focus of the 4-meter Mayall telescope of Kitt Peak National Observatory. North is at the top and east to the left. The original 2048x2048-pixel format has been averaged down to 512x512 for this presentation. The field shown here is 14.3 arcminutes square. The cluster of bright stars is not as obvious as one would think, since the visual impression is hard to capture on a monitor across such a wide brightness range.
Open cluster M52 in Cassiopeia, as photographed from Kitt Peak, near
Tucson, Arizona, using the Burrell Schmidt telescope of Case Western
Reserve University's Warner and Swasey Observatory.
This picture was created by combining CCD images in red, green and blue
colors. The conspicuous red star a little right of center does not belong
to the cluster.
Last Modification: June 27, 1999