Celestial hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  IC 4277  ·  IC 4278  ·  M 51  ·  NGC 5194  ·  NGC 5195  ·  Whirlpool Galaxy
M51 - Whirlpool Galaxy, Kyle Butler
M51 - Whirlpool Galaxy
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M51 - Whirlpool Galaxy

M51 - Whirlpool Galaxy, Kyle Butler
M51 - Whirlpool Galaxy
Powered byPixInsight

M51 - Whirlpool Galaxy

Equipment

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Acquisition details

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Description

Exposure Details

50x 300s Ha (111 gain, 10 offset, bin 1x1)

260x 60s L (53 gain, 10 offset, bin 1x1)

50x 20s R (53 gain, 10 offset, bin 2x2)

50x 20s G (53 gain, 10 offset, bin 2x2)

50x 20s B (53 gain, 10 offset, bin 2x2)

9.3 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

Deconvolution on Luminance channel

MultiscaleLinearTransform noise reduction on each channel with luminance mask

Combined RGB using ChannelCombination

BackgroundNeutralization and ColorCalibration on RGB image

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 and ColorSaturation

Final noise reduction and local contrast enhancement in Photoshop

Comments

Sky plot

Sky plot

Histogram

M51 - Whirlpool Galaxy, Kyle Butler