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Contains:  M 31, Great Nebula in Andromeda, NGC 224, M 32, NGC 221, M 110, NGC 205
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M31 (Andromeda Galaxy), 


M31 (Andromeda Galaxy)

M31 (Andromeda Galaxy)

Technical card

Resolution: 3339x2691

Dates:Nov. 11, 2018

Frames: 120x120"

Integration: 4.0 hours

Avg. Moon age: 3.70 days

Avg. Moon phase: 14.71% job: 2400110

RA center: 10.680 degrees

DEC center: 41.253 degrees

Pixel scale: 3.188 arcsec/pixel

Orientation: 73.026 degrees

Field radius: 1.899 degrees

Locations: Home, Silver Spring, Maryland, United States

Data source: Backyard


This is my second attempt imaging the Andromeda Galaxy (M31). This image combines four hours of images taken over the course of three nights.

M31 imaged with WO GT81 at F4.7 (382 mm focal length) using Flat6A II field flattener/0.8x reducer and Nikon D750. Stacked using DSS for a total integration time of ~4 hours using 120 sec subs at ISO 200. Subtracted darks, bias, and flats. Processed in Pixinsight: Cropped, gradient removal with DBE, Background Neutralization, Color Calibration, SCNR, stretched using Histogram Transformation Tool, Curves Transformation, HDR Multiscale Transform, ACDNR noise reduction, Morphological Transformation to shrink stars.



License: None (All rights reserved)

Sky plot

Sky plot


M31 (Andromeda Galaxy),