M31,

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7. M31, Andromeda Galaxy (Ανδρομεδη)

Distance: 2.54 million ly
App. Magnitude: 3.4
App. Dimensions: 190'x60' (cf. telescope field of view 119')

Notes: This is the same image as (5) with additional processing in PhotoShop by Alan. Andromeda has a span of 190 by 60 arc minutes. Since our telescope has a field of view of 119 by 80 arcminutes, we can capture only a part of the galaxy. Since our image occupies only part of the field of view (It has been cropped a bit.), much of the light from Andromeda that falls within our field of view must be too faint to capture by our methods and equipment. Much longer subexposures would be required. Zoom in/out with ⌘↑(+/-) (Mac), ctrl (+/-) (PC).

Location: Nevada City
Date: November 26, 2011
Scope: Stellarvue 80ED
Mount: CGEM
Guide scope: Orion 80mm x 400 mm ShortTube
Guide camera: Orion Starshoot
Guide program: PHD Guiding
Camera: Canon T1i
ISO: 1600
Exposures: 10 at 10 min each, darks: 10, biases: none, flats: 10
Processing software: Nebulosity, Photoshop
Processing: stacked and aligned, power stretch, curves; additional processing in Photoshop
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