Celestial hemisphere:  Northern  ·  Constellation: Hercules (Her)  ·  Contains:  Great Cluster in Hercules  ·  M 13  ·  NGC 6205
M13 - The Great Globular Cluster, Jeff Tropeano
M13 - The Great Globular Cluster
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M13 - The Great Globular Cluster, Jeff Tropeano
M13 - The Great Globular Cluster
Powered byPixInsight

Equipment

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Acquisition details

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Description

Multiple Exposure Sets:

Lights:

30 frames at ISO200 for 60 seconds

15 frames at ISO200 for 120 seconds

10 frames at ISO3200 for 15 seconds

Darks:

10 frames of each ISO and exposure above

Bias:

30 frames of each ISO above

Processed in PixInsight:

Batch Preprocessed with default settings

AutomaticBackgroundExtraction

Cropped

Extracted Luminance, added mask, inverted to protect light areas

HistogramTransformation to attempt to darken BG

Inverted back to normal, Histogram again to lighten light areas (but only slightly since core is blown out)

CurvesTransformation to boost contrast

I'm disappointed in the loss of color contrast in the final. Everything is monotone, blue/green, and flat. I'm happy with the contrast and clarity, however.

Comments

Sky plot

Sky plot

Histogram

M13 - The Great Globular Cluster, Jeff Tropeano