Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  M 81  ·  NGC 3031
M81 - Bode's Galaxy, Kyle Butler
M81 - Bode's Galaxy
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M81 - Bode's Galaxy

M81 - Bode's Galaxy, Kyle Butler
M81 - Bode's Galaxy
Powered byPixInsight

M81 - Bode's Galaxy

Equipment

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Acquisition details

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Description

Exposure Details

15x 300s Ha (111 gain, 10 offset, bin 1x1)

180x 60s L (53 gain, 10 offset, bin 1x1)

60x 20s R (53 gain, 10 offset, bin 2x2)

60x 20s G (53 gain, 10 offset, bin 2x2)

60x 20s B (53 gain, 10 offset, bin 2x2)

5.1 hours total integration time

Processing

Processed each channel individually

Frames calibrated and stacked in PixInsight, drizzle 2x

DynamicCrop to trim borders from dithering

DynamicBackgroundExtraction on each channel

MultiscaleLinearTransform noise reduction on each channel with luminance mask

Combined RGB using ChannelCombination

Added Ha using NBRGBCombination script

Fit L to HaRGB using LinearFit

Added L to HaRGB using LRGBCombination with Chrominance noise reduction enabled

Stretched HaLRGB to non-linear using HistogramTransformation

CurvesTransformation

Final noise reduction and local contrast enhancement in Photoshop

Comments

Sky plot

Sky plot

Histogram

M81 - Bode's Galaxy, Kyle Butler