NGC4565 – Edge-on Spiral Galaxy

 

This large spiral galaxy in Coma Berenices presents an edge-on view to us. It is between 30 and 45 million light years away.


NGC4565 edge-on spiral galaxy
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Equipment Celestron 9¼" at f/10 on a Celestron CGE equatorial mount
SBIG ST-8XM camera
SBIG AO-7 adaptive optics unit
Optec IFW filter wheel with Astrodon TruBalance LRGB filters
Optec TCF-S focuser
Optec Pyxis camera rotator
Imaging and autoguiding with MaxIm DL 4
Exposure
Luminance   8.2 hours (98 x 5 min.), binned 1x1 (56 @ -20°C, 42 @ -15°C)
Red   1.3 hours (15 x 5 min.), binned 2x2 @ -20°C
Green   1.3 hours (15 x 5 min.), binned 2x2 @ -20°C
Blue   1.4 hours (17 x 5 min.), binned 2x2 @ -20°C
(Another hour apiece of RGB is awaiting processing, to be added to this image.)
Processing Dark and flat frame reduction in CCDSoft
Sigma-reject combined in MaxIm
Several iterations of levels and curves in Photoshop CS
Highpass filter and NeatImage filter in Photoshop CS
Date and Location Luminance: 1 & 10 May 2005
Color: 2, & 3 May 2005
Montpelier, VA    N 37° 49' 12", W 77° 42' 06"