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Contains:  M 83, NGC 3109, NGC 5236
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M83 The Southern Pinwheel Galaxy, 


M83 The Southern Pinwheel Galaxy
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M83 The Southern Pinwheel Galaxy

Technical card

Dates:June 10, 2018

Frames: 19x240" ISO800 14C

Integration: 1.3 hours

Avg. Moon age: 25.83 days

Avg. Moon phase: 14.74%

Bortle Dark-Sky Scale: 3.00

Temperature: -1.00

Basic astrometry details job: 2103607

RA center: 13h 37' 16"

DEC center: -29° 52' 15"

Pixel scale: 0.728 arcsec/pixel

Orientation: 358.294 degrees

Field radius: 0.352 degrees

Resolution: 2761x2117

Locations: Mobile Observatory, Mt Dandenong, Victoria, Australia

Data source: Unknown


I had a window of opportunity to go to a dark site an hour away on Mount Donna Buang. At 1250m, I was hoping to get above the damp valleys for better imaging. So filling in time waiting for a midnight target to rise in the sky, I ran a few images off of M83 to tweak the guiding for later. I had great guiding all within a 2 arc sec range on this moonless and windless night. It was just below zero C and the humidity was lower than normal. Everything fell into place to run off 19 shots of the Southern Pinwheel. The low humidity and cold sensor temp (for a DSLR) helped in revealing more detail than I expected. Later the wind picked up and my planned target was not available for me in the end. Astro photography is much like going fishing. You never know what you will catch!



License: None (All rights reserved)


  • M83 The Southern Pinwheel Galaxy, 


  • Final
    M83 The Southern Pinwheel Galaxy, 




Description: Reprocessing with a colour calibrated monitor.

Sky plot

Sky plot


M83 The Southern Pinwheel Galaxy,