This color composite is from B and R images (with synthetic V) taken during twilight with a Tektronix 2048x2048 CCD at the 2.1-meter telescope of Kitt Peak National Observatory, by Bill Keel and Lisa Frattare. North is at the top and east to the left, for direct comparison with a chart or eyepiece view. The image has been block-averaged by a factor of 2 for this presentation, which uses a logarithmic intensity transformation to preserve information across a wide dynamic range. The field is 9.3 arcminutes high. A few of the brighter field stars saturated the CCD so strongly that some of the electric charge bled along columns, giving the vertical streaks from several stars.
The pair NGC 3623/7 (M65/66) is well shown in context in this red-light CCD image obtained with UA's 0.4-meter telescope:
Last changes: 7/2003 © 2003