Contains: M 13, Great Cluster in Hercules, NGC 6205
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Messier 13

Technical card

Resolution: 3308x2440

Dates: May 23, 2015May 25, 2015

Frames:
Baader Blue 36mm: 16x300" -15C bin 1x1
Baader Green 36mm: 15x300" -15C bin 1x1
Baader Red 36mm: 9x300" -15C bin 1x1

Integration: 3.3 hours

Avg. Moon age: 6.27 days

Avg. Moon phase: 38.47%

Bortle Dark-Sky Scale: 5.00

Astrometry.net job: 653016

RA center: 250.419 degrees

DEC center: 36.464 degrees

Orientation: -179.659 degrees

Field radius: 0.395 degrees

Description

Version A is a simple crack at processing the RGB data without constructing a synthetic L.
Version B uses a synthetic L layer to help bring out the fainter stars.
Version C deals with the red halos that were around the yellow stars.

Comments

Author

Madratter
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Messier 13, Madratter