M31_Andromeda_Galaxy_2010-11-08_v3_SJM

M31 Andromeda Galaxy - 2010-11-08 - v3

M31 Andromeda Galaxy – 2010-11-08 – v3

M31 v3 – 2010-11-08

Andromeda Galaxy, Messier 31 (M31), NGC 224
Image data 2010-11-02 and 2010-11-08

Andromeda, also known as M31 or NGC 224, is a large spiral galaxy in the constellation Andromeda. The constellation Andromeda forms the tail of the more familiar constellation Pegasus. Located at a distance of 2.5mly from us (with some estimates putting it at 2.9mly) it is still part of what is called our “local group”. Andromeda is also interesting in that it closely resembling our own Milky Way in both size and shape and is referred to as our “sister galaxy”. Looking up at Andromeda then, is like seeing what the Milky Way looked like 2.5million years ago. From moderately dark skies it can be seen with the unaided eye, making it the furthest object that can be seen without a telescope.

Apparent size: 190′ x 60′ (pretty well the corner to corner diagonal of this image)
Visual Magnitude: 3.4
Distance: 2.5mly

Image Details:

30 x 360s @ ISO1600 (3hrs on 2010-11-02)
40 x 360s @ ISO800 (4hrs on 2010-11-08)
Canon XS/1000d (filter removed)
– Baader Semi-APO filter
– Astronomik IR/UV EOS Clip filter
Pronto 70mm f/6.8 with Televue 0.8x Flattener
– effective FL 384mm, f/5.4
CGE Pro
Guided with AT106le on Tandem bar
Guide Camera Point Grey Chameleon at 640×480, 16bit, 7.5fps
Guide App Metaguide

Image acquisition with ImagesPlus
Calibrated and Stacked with ImagesPlus
Processed with PixInsight as a one-shot colour image.