Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  NGC 3938
NGC 3938, Kyle Butler
NGC 3938
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NGC 3938

NGC 3938, Kyle Butler
NGC 3938
Powered byPixInsight

NGC 3938

Equipment

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Acquisition details

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Description

Exposure Details

165x 60s L (53 gain, 10 offset, bin 1x1)

40x 20s R (53 gain, 10 offset, bin 2x2)

40x 20s G (53 gain, 10 offset, bin 2x2)

40x 20s B (53 gain, 10 offset, bin 2x2)

3.4 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

BackgroundNeutralization, ColorCalibration, and SCNR on RGB image

Stretched RGB and L to non-linear using HistogramTransformation

Added L to RGB using LRGBCombination with Chrominance noise reduction enabled

ColorSaturation with masking

CurvesTransformation

Final noise reduction and local contrast enhancement in Photoshop

Comments

Sky plot

Sky plot

Histogram

NGC 3938, Kyle Butler