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The Andromeda Galaxy (M31) | by Martin_Heigan
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The Andromeda Galaxy (M31)

The Andromeda Galaxy, also known as Messier 31, M31, or

NGC 224 (as seen from the Southern Hemisphere).

 

M31 is a large Spiral Galaxy approximately 2.5 million light-years from Earth. It is the nearest major Galaxy to the Milky Way, in the constellation of Andromeda. At approximately 220,000 light-years across, it is the largest Galaxy of the Local Group, which also contains the Milky Way Galaxy, the Triangulum Galaxy, and about 44 other smaller Galaxies.

 

About this image:

This image consists of 16 x 3 minute exposures at ISO 6400. In the Southern Hemisphere (at my latitude), M31 is only visible low on the horizon in the early morning hours just before sunrise. It was photographed in the middle of Winter in the rural dark skies of the Karoo (Northern Cape, South Africa).

 

Gear:

GSO 6" f/4 Imaging Newtonian Reflector Telescope.

Baader Mark-III MPCC Coma Corrector.

Astronomik CLS Light Pollution Filter.

Orion StarShoot Autoguider.

Celestron AVX Mount.

Celestron StarSense.

Canon 60Da DSLR.

 

Guiding in Open PHD 2.6.1.

Image acquisition in Sequence Generator Pro.

Lights/Subs: 16 x 180 sec. ISO 6400 CFA FIT Files.

Calibration Frames:

50 x Bias

30 x Darks

20 x Flats

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

 

Astrometry Info:

nova.astrometry.net/user_images/1189668#annotated

RA, Dec center: 10.470393812, 41.2943394941 degrees

Orientation: 1.26689659133 deg E of N

Pixel scale: 5.93014712129 arcsec/pixel

 

View my Astrophotography Galley.

 

Martin

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Uploaded on July 8, 2016