M83 Galaxy

M83 Galaxy

Southern Pinwheel Galaxy

Constellation: Hydra
Ra: 13h 37m 0s
Dec: -29d 52m 2s
Distance: 15 million light years
Image Size: 30' x 30'
North: Up; East left



M83 (NGC 5236) is a large, bright spiral galaxy in the southern constellation of Hydra about 15 million light years distant. It is known as the Southern Pinwheel Galaxy due to its resemblance to the Pinwheel Galaxy (M101) in Ursa Major. It is a large, grand design spiral galaxy with a weak central bar and loosely wound spiral arms. The edges of the spiral arms contain many new stars in the pinkish regions thought to result from an encounter with dwarf galaxy NGC 5252 about 2 degrees to the south (below the bottom of the image). North is up, East is to the left, and the field of view is 30′ x 30′. The galaxy is approximately 10′ x 10′. There is a very faint star stream just off the top (north) edge of the frame. There are many distant galaxies throughout the image that appear tiny in comparison to M83. M83 is one of the closest barred spiral galaxies to our Milky Way Galaxy, and with 40 billion stars, it can be considered as our smaller cousin.

Exposure: 11.5 hrs Total: 5 hrs Lum; 6.5 hrs RGB
Telescope: PlaneWave CDK20, 0.5 m f/6.8
Mount: PlaneWave Ascension 200h
Oag: Astrodon MonsterMOAG
Acquisition: ACP-Expert
Calibration: CCDStack2
Observatory Site: iTelescope, Siding Spring, NSW, Australia
Camera: SBIG STX 16803
Filters: Astrodon Gen 2 LRGB
Guider: Starlight Xpress Lodestar
Camera Operation: Maxim 5.24
Processing: Photoshop CC 2019
Image Date: 05/09/2018 - 05/14/2018

1 Comment

  1. Josep Drudis

    Excellent image, Don. Good quality data (wonderful telescope/camera) and a masterful processing that render the best amateur image of this galaxy that I can recall… I especially like the treatment of the dark lanes. Congratulations!


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