NGC869 / NGC884 : The Double Cluster in Perseus

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.

Additional information on the Double Cluster can be found on the SEDS website.

Photograph Information

Date 11.22 and 11.24.2008

Location Clearfield Observatory

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.

Photograph Information
Date	11.22 and 11.24.2008
Location	Clearfield Observatory
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.