The double cluster is a wonderful naked eye object located in the constellation of Perseus. Best viewed at low power using binoculars or a wide field telescope. This pair of open clusters has been known to man since recorded times.
Click image or here for larger version (1440 x 930, 622kb).
Additional information on the Double Cluster can be found on the SEDS website.
|Date||11.22 and 11.24.2008|
|Telescope||AP130 @ f4.5 w/AP telecompressor|
|Camera||Canon 40D, un-modified|
|Exposure||Sum of 75, 2 minute exposures at ISO 400|
|Notes||Both nights around 32°F, 85%rh, with good seeing and good transparency|
Initial RAW conversion, mild asinh stretch in IRIS.
Calibrated with bias, dark and flat frames.
Slight noise reduction in PixInsight LE 1.02.
Additional adjustments in Photoshop CS2 including a mild application of star color enhancement as described by Jerry Lodriguss.