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Contains:  M 83, NGC 5236
Getting plate-solving status, please wait...
M83 - The Southern Pinwheel Galaxy Wide Field, 


            Gabriel R. Santos...
M83 - The Southern Pinwheel Galaxy Wide Field

M83 - The Southern Pinwheel Galaxy Wide Field

Technical card

Resolution: 2400x1600

Dates:April 9, 2016

Frames: 20x120" ISO800

Integration: 0.7 hours

Darks: ~19

Bias: ~20

Avg. Moon age: 2.37 days

Avg. Moon phase: 6.23%

Mean FWHM: 3.80

Temperature: 12.70 job: 1221798

RA center: 204.201 degrees

DEC center: -29.916 degrees

Pixel scale: 8.521 arcsec/pixel

Orientation: 87.353 degrees

Field radius: 3.413 degrees

Locations: Sítio, Cristina, MG, Brazil


M83 is a beautiful galaxy, fairly large in apparent size, barred spiral galaxy, distant some 15 million light-years from Earth, in Hydra. It is one of the most beautiful galaxies to be seen in the Southern Hemisphere, along the Magellanic Clouds and Centaurus A. From my location it is faintly visible in 7x50 binoculars and also as a round spiral fuzzy on a 150mm newtonian.

Background is quite noisy, as my exposure time simply is was not enough to pull out as much detail as I've wanted. Furthermore, the image scale for this object is just off to me, however, not owning a (proper for astro) telescope, I could only snap this galaxy on a camera lens, that provides too much of a wide field. Therefore, I'm not completely satisfied with this image. Will probably try again with longer exposures to show more background galaxies (if any) next season. Slightly cropped from full size image, about 88% of original frame, for better centering of the galaxy and to "hide" vignetting issues on the corners. Processing as usual, with LR, DSS and PS CC (+HLVG and Nik Collection plugins).

Constructive criticism, comments and suggestions are more than welcome in the comments section. Thank's for taking your time to look at this image.

Taken from Rural Skies (Bortle 3-4; NELM ~6.2), from Cristina, MG, Brazil (22ºS latitude).

Date and Time: April 9th, 2016, at 23:30h (UTC-3)
Camera: Unmodded Canon T4i/650D, at ISO 800
Lens: Tamron 70-200mm f/2.8, at 200mm, operated at f/3.5
Exposure Detail: 20x120s, total 40min



Gabriel R. Santos...
License: None (All rights reserved)

Sky plot

Sky plot


M83 - The Southern Pinwheel Galaxy Wide Field, 


            Gabriel R. Santos...