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Contains:  NGC 6207, M 13, Great Cluster in Hercules, NGC 6205, IC 4615
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M13 - old test data, 





    
        

            Simon
M13 - old test data

M13 - old test data

Technical card

Resolution: 2744x1904

Astrometry.net job: 2663247

RA center: 250.430 degrees

DEC center: 36.433 degrees

Pixel scale: 2.303 arcsec/pixel

Orientation: 179.974 degrees

Field radius: 1.069 degrees

Data source: Amateur hosting facility

Remote source: e-EyE Extremadura

Description

I had some old 'test data' for the scope in Spain from last May [2018], but no flats for the colour filters at all. As that is so, I decided some time ago, not to bother with processing this image, and the next set of images, for that very reason. However, I had a change of mind and thought I would give it a try, using the luminance flat frames for all filters! It was not straight forward at all, with all sorts of vignetting and bad gradients, plus other oddities, but even so, this, and the next set of images, are my results from processing over the last few days. I am pleased to have been able to pull out some of the detail of the internal structure of the globular, although I am not that happy with the star colour...

This one was 32 luminance subs at 300s each and 60 subs at 300s of RGB. Integration time: just over 6.5 hours...

Comments

Author

downingsimon
Simon
License: None (All rights reserved)
410
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M13 - old test data, 





    
        

            Simon