NGC2903 – Barred Spiral Galaxy

 
NGC2903 is a spiral galaxy with a bright central bar, located in the Leo constellation. It is estimated to be about 20 million light years away.

M63

Equipment
Celestron 9¼" at f/7 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
Imaging and autoguiding with MaxIm DL 4.07
Exposure
Luminance   100 minutes (20 x 5 min.) binned 1x1, -20°C
Red   80 minutes (16 x 5 min.) binned 2x2, -20°C (lost one frame due to satellite trail)
Green   85 minutes (17 x 5 min.) binned 2x2, -20°C
Blue   85 minutes (17 x 5 min.) binned 2x2, -20°C
Processing Dark and flat processing in CCDSoft
Sigma-reject comgine
Levels and curves, Neat Image, unsharp mask in Photoshop CS
Date and Location Luminance: 8 March 2005
Color: 14 & 15 March 2005
Montpelier, VA    N 37° 49' 12", W 77° 42' 06"