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Contains:  M 13, Great Cluster in Hercules, NGC 6205
Getting plate-solving status, please wait...
M13 in Hercules, 


            Pat Rodgers
M13 in Hercules

M13 in Hercules

Technical card

Resolution: 1341x981

Dates:March 26, 2016

Baader B 1.25'' CCD Filter: 10x180" -20C bin 1x1
Baader G 1.25'' CCD Filter: 10x180" -20C bin 1x1
Baader UV/IR Cut Filter L 1.25'' CCD Filter: 12x300" -20C bin 1x1
Baader R 1.25'' CCD Filter: 10x180" -20C bin 1x1

Integration: 2.5 hours

Darks: ~41

Flats: ~31

Bias: ~100

Avg. Moon age: 17.45 days

Avg. Moon phase: 92.07%

Bortle Dark-Sky Scale: 5.00

Temperature: 6.00 job: 1048375

RA center: 250.431 degrees

DEC center: 36.456 degrees

Pixel scale: 1.328 arcsec/pixel

Orientation: 17.948 degrees

Field radius: 0.306 degrees

Locations: Un-stable Observatory, back garden., Huddersfield, West Yorkshire, United Kingdom


Taken on the 26th March 2016.
My 1st process of this blew the centre of the core. So on this attempt, taking it from linear to non linear I made masks after every stretch, applied the mask and stretched the image again, then a new mask of the larger core etc.
The end result was a lot tidier around the core.



Pat Rodgers
License: None (All rights reserved)

Sky plot

Sky plot


M13 in Hercules, 


            Pat Rodgers