Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  IC 1590  ·  NGC 281
NGC 281 - The Pacman Nebula, Kyle Butler
NGC 281 - The Pacman Nebula
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NGC 281 - The Pacman Nebula

NGC 281 - The Pacman Nebula, Kyle Butler
NGC 281 - The Pacman Nebula
Powered byPixInsight

NGC 281 - The Pacman Nebula

Equipment

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Acquisition details

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Description

Exposure Details

25x 300s Ha (111 gain, 10 offset)

25x 300s SII (111 gain, 10 offset)

25x 300s OIII (111 gain, 10 offset)

6.3 hours total integration time

Processing

Processed each channel individually

Frames calibrated and stacked in PixInsight, drizzle 2x

DynamicBackgroundExtraction

MultiscaleLinearTransform noise reduction on each channel with luminance mask

Stretched each channel to non-linear using ArcsinhStretch + HistogramTransformation

Combined channels using pixel math (roughly SHO, with a dynamic expression)

R=SII

G=(OIII^~OIII)*SII + ~(OIII^~OIII)*Ha

B=((OIII*Ha)^~(OIII*Ha))*Ha + ~((OIII*Ha)^~(OIII*Ha))*OIII

Another round of MultiscaleLinearTransform noise reduction on combined image with masking

ColorSaturation

CurvesTransformation

DarkStructureEnhance

Comments

Sky plot

Sky plot

Histogram

NGC 281 - The Pacman Nebula, Kyle Butler