Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  NGC 281
NGC 281 (Sh2-184) Nebula in Ha, 



    
        

            Mike Oates
NGC 281 (Sh2-184) Nebula in Ha
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NGC 281 (Sh2-184) Nebula in Ha

NGC 281 (Sh2-184) Nebula in Ha, 



    
        

            Mike Oates
NGC 281 (Sh2-184) Nebula in Ha
Powered byPixInsight

NGC 281 (Sh2-184) Nebula in Ha

Acquisition details

Dates:
Oct. 16, 2019
Frames:
Astrodon 3nm SII: 22×1200(7h 20′) bin 1×1
Ha 3nm: 30×600(5h) bin 1×1
Integration:
12h 20′
Avg. Moon age:
17.18 days
Avg. Moon phase:
93.53%
Bortle Dark-Sky Scale:
8.00
Mean SQM:
18.30

Basic astrometry details

Astrometry.net job: 2994564

RA center: 00h51m40s.6

DEC center: +56°3900

Pixel scale: 1.434 arcsec/pixel

Orientation: 359.738 degrees

Field radius: 0.892 degrees

Resolution: 3414x2894

File size: 5.1 MB

Locations: The Hills Observatory, Manchester, United Kingdom

Data source: Backyard

Description

This is a deep image taken with Astrodon 3nm Ha filter. The conditions for two of the three nights this was imaged over were very poor with full Moon and an average SQM-L of 18.0, while the best night was 18.8 and no Moon. Most of the images were taken on the poor nights. This just goes to show how valuable narrow band filters are for those with poor skies.

So going deep on this means it looks very different to most images of this nebula and appears much larger.

All processing in PixInsight and final touches in Photoshop.

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NGC 281 (Sh2-184) Nebula in Ha, 



    
        

            Mike Oates