Globular cluster Messier 71 (NGC 6838) in Sagitta, shown from a 15-second V-band exposure 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. A 512x512-pixel region is shown in this presentation, which uses a logarithmic intensity transformation to preserve information across a wide dynamic range. The field shown is 3.6 arcminutes square. This cluster presents a visual impression that looks more like a very rich open cluster (such as M11) than typical globular clusters, being rather sparse compared to some of its kind in this part of the sky.
From Bill Keel's collection at the University of Alabama.
Three color composite image of M71 by T. Credner, S. Kohle, University of Bonn, taken on October 22/23, 1995 with the 1.23-m Calar Alto telescope. Exposures: Blue (B):42m, Green (V):20m, Red (I):9m with WWFPP, 2048x2048 CCD. Field of view is 20.7x18.8'. © T. Credner and S. Kohle
Last Modification: May 20, 1999