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Contains:  M 31, Great Nebula in Andromeda, NGC 224, M 32, NGC 221, M 110, NGC 205, The star νAnd
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HaLRGB - M31 - Andromeda Galaxy, 





    
        

            Min Xie
HaLRGB - M31 - Andromeda Galaxy

HaLRGB - M31 - Andromeda Galaxy

Technical card

Resolution: 1920x1200

Dates:Oct. 26, 2018Nov. 2, 2018Nov. 3, 2018

Frames:
Astrodon 3nm Ha 31mm: 70x180" (gain: 200.00) -20C bin 1x1
Astrodon E Series Gen II Blue 31mm: 36x60" (gain: 74.00) -20C bin 1x1
Astrodon E Series Gen II Green 31mm: 40x60" (gain: 74.00) -20C bin 1x1
Astrodon E Series Gen II Lum 31mm: 90x60" (gain: 74.00) -20C bin 1x1
Astrodon E Series Gen II Red 31mm: 37x60" (gain: 74.00) -20C bin 1x1

Integration: 6.9 hours

Darks: ~30

Flats: ~40

Bias: ~80

Avg. Moon age: 21.95 days

Avg. Moon phase: 48.77%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 18.00

Temperature: 11.00

Astrometry.net job: 2355560

RA center: 11.057 degrees

DEC center: 41.239 degrees

Pixel scale: 4.625 arcsec/pixel

Orientation: 5.834 degrees

Field radius: 1.454 degrees

Locations: TAS Atoka Dark Site, Atoka, Oklahoma, United States

Data source: Backyard

Description

M31 was the first target when I got into this hobby exactly one year ago. Still remember the struggle of finding this target in the Nikon D500 live view window. The first result was just nothing - but at that time, it really made me excited for couple of days.

A year later, I decided to revisit to M31. It does mean a lot to this hobby of mine. Actually it took quite long time for me to collect the data, H-Alpha was captured in the white zone backyard. L/R/G/B was captured at TAS Atoka dark site.

It's also my first attempt to do a HaLRGB. Indeed clueless... Not sure how I made it out.

Clear Skies!

Comments

Author

mxcoppell
Min Xie
License: Attribution-NonCommercial Creative Commons
2500
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Revisions

  • HaLRGB - M31 - Andromeda Galaxy, 





    
        

            Min Xie
    Original
  • HaLRGB - M31 - Andromeda Galaxy, 





    
        

            Min Xie
    B
  • Final
    HaLRGB - M31 - Andromeda Galaxy, 





    
        

            Min Xie
    C

B

Touch up on color tune and local adjustments...

C

Slightly de-noise the highlight regions.

Sky plot

Sky plot

Histogram

HaLRGB - M31 - Andromeda Galaxy, 





    
        

            Min Xie