Hemisphere:  Northern  ·  Constellation: Perseus (Per)  ·  Contains:  NGC 1624
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NGC 1624 (Sh2-212), 


            Mike Oates
NGC 1624 (Sh2-212)
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NGC 1624 (Sh2-212)

Technical card

Imaging telescopes or lenses: Takahashi FSQ-106 ED

Imaging cameras: Starlight Xpress SX-814 Trius Monochrome CCD

Guiding cameras: Starlight-XPress Lodestar Autoguider

Software: Sequence Generator Pro  ·  Photoshop CS6  ·  PIXINSIGHT 1.8

Filters: Astrodon 3nm SII  ·  Astrodon 3nm OIII  ·  Ha 3nm  ·  Red  ·  Green  ·  Blue  ·  Astrodon L-NIR

Accessory: Lakeside Astro Motor Focus System  ·  Starlight Xpress SX 'Maxi wheel'  ·  Starlight Instruments FTF3545B-A Focuser

Dates:March 29, 2019

Astrodon 3nm OIII: 7x600" bin 1x1
Astrodon 3nm OIII: 8x600" bin 2x2
Astrodon 3nm SII: 17x600" bin 1x1
Blue: 49x180" bin 2x2
Green: 51x180" bin 2x2
Ha 3nm: 17x600" bin 1x1
Ha 3nm: 7x600" bin 2x2
Astrodon L-NIR: 32x900" bin 2x2
Red: 50x300" bin 2x2

Integration: 26.5 hours

Avg. Moon age: 23.33 days

Avg. Moon phase: 37.51%

Bortle Dark-Sky Scale: 8.00

Mean SQM: 18.60

Basic astrometry details

Astrometry.net job: 2752054

RA center: 4h 39' 37"

DEC center: +50° 38' 31"

Pixel scale: 1.435 arcsec/pixel

Orientation: 359.519 degrees

Field radius: 0.841 degrees

Resolution: 3270x2670

Locations: The Hills Observatory, Manchester, United Kingdom

Data source: Backyard


This turned out a tricky image to process and took many iterations to get the final result. Although I took lots of RGB subs, using that data for the dust was not easy as the data was quite noisy due to the city light pollution from my home. I ended up mainly using the Near InfraRed data which was cleaner.

Adding the RGB data to the narrowband was also difficult as the red signal was very strong throwing the colour of the nebulae off.

So in the end I processed the narrowband data as starless (using the new excellent StarNet++ module in PixInsight by Nikita Misiura) The NIR(L) image was also processed starless and just used for the dust. The RGB was used for the stars using a Ha mask to reduce the red in the RGB image and a starless RGB image was also added with the NIR for the dust.

All combined in Photoshop with different filters on separate layers.


Sky plot

Sky plot


NGC 1624 (Sh2-212), 


            Mike Oates

In these public groups

Broadband under Bortle 7/8/9