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Contains:  IC1590, NGC 281, NGC281, Sh2-184
Getting plate-solving status, please wait...
NGC 281 in HOO, 


            Glenn Diekmann
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NGC 281 in HOO

Technical card

Dates:Dec. 12, 2018

Astrodon H-alpha 5 nm: 30x240" (gain: 139.00) -10C bin 1x1
Astrodon OIII 3 nm: 11x240" (gain: 139.00) -10C bin 1x1

Integration: 2.7 hours

Darks: ~50

Flats: ~16

Flat darks: ~50

Bias: ~200

Avg. Moon age: 4.73 days

Avg. Moon phase: 23.25%

Bortle Dark-Sky Scale: 7.00 job: 3248323

RA center: 0h 52' 40"

DEC center: +56° 40' 26"

Pixel scale: 1.098 arcsec/pixel

Orientation: 0.597 degrees

Field radius: 0.871 degrees

Resolution: 4568x3428

Data source: Backyard


This is my first image with narrowband filters. I do not yet have an SII filter, so this one is Ha and OIII only. I was surprised by how much noise was in the OIII channel. Suppressing the noise and obtaining somewhat natural star colors were the most challenging aspects of this project.



Glenn Diekmann
License: None (All rights reserved)

Sky plot

Sky plot


NGC 281 in HOO, 


            Glenn Diekmann