Celestial hemisphere:  Northern  ·  Constellation: Pegasus (Peg)  ·  Contains:  NGC 7318  ·  NGC 7319  ·  NGC 7320  ·  NGC 7331  ·  NGC 7335  ·  NGC 7337  ·  NGC 7343
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Pegasus Galaxies (NGC 7331 and Stephan's Quintet), Scott Denning
Pegasus Galaxies (NGC 7331 and Stephan's Quintet)
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Pegasus Galaxies (NGC 7331 and Stephan's Quintet)

Getting plate-solving status, please wait...
Pegasus Galaxies (NGC 7331 and Stephan's Quintet), Scott Denning
Pegasus Galaxies (NGC 7331 and Stephan's Quintet)
Powered byPixInsight

Pegasus Galaxies (NGC 7331 and Stephan's Quintet)

Equipment

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Acquisition details

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Description

Layers of Galaxies in Pegasus

NGC 7331 & “The Fleas” plus Stephan’s Quintet

Borg 125SD f/8 (1050 mm) on iOptron CEM 40EC

ZWO ASI 1600 MM Pro with filter wheel

Guided with ASI 290 mini on Kowa Guider (FL=100 mm)

After selection & weighting

57xL 65xR 67xG 68xB all 300 seconds

Total exposure = 21.4 hours

Calibrated with Darks, Flats, & Flat Darks

Cosmetic Correction

Star aligned

Subframe selection (discarded ~ 50%) w weighting

Integrated with ESD pixel & large-scale hi+low rejection

Mure Denoise

RGB Channel combination

Photometric Color Calibration

LRGB Combine

Deconvolution

Auto psf

Light stretch & StarNet++ for LDSI

Very aggressive range masking to isolate galaxies for DECON mask

50 iterations with standard parameters

Starnet++ on deconvolved LRGB to separate stars from galaxies

Re-apply range mask & blur background noise behind galaxies with Convolution

Sat Boost both stars and galaxies (separately)

Combine stars and galaxies

Final historgram adjustments

Comments

Sky plot

Sky plot

Histogram

Pegasus Galaxies (NGC 7331 and Stephan's Quintet), Scott Denning