M51 (NGC 5194) in Canes Venaciti.


Right Ascension: 13h:29.9m, Declination: 47d:12m(deg:m)
Visual Brightness: 8.4 Mag, Apparant Dimension is 11.2 x 6.9 arc minutes, Distance: 37,000(kly)

M51,a face on spiral galaxy with neighbor, The Whirlpool Galaxy. Nine minute exposure on CCD.

The first image is made up of 9 * 60 second images camera cooled -15degree C below ambient. Images co-added after autodark subtract. It is at 400mm f1.95 Fastar image making it a 41.1 x 30.8 arc minute frame. Imaged 03/18/2003. There is no guideing.

M51,a face on spiral galaxy with neighbor, The Whirlpool Galaxy. Fifteen minute exposure on CCD.
The second / right image is 3*300s at f1.95 Fastar. Imaged 03/10/2003 at Wye Mtn Observatory. The camera was cooled to -25degree C below ambient temp. It is cropped from a 640x480 pixcel image of 41.1x30.8 arcminutes. It is roughly 20.48 arcminutes wide by 16.11 arcminutes tall. Guided with C102 f10 and SBIG ST4 camera. 

M51,a face on spiral galaxy with neighbor, The Whirlpool Galaxy.

5 minutes each of read, green, blue and luminance added. July 19, 2004

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