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Sh2-132 in BiColor Ha & OIII, 


            Douglas J Struble
Sh2-132 in BiColor Ha & OIII

Sh2-132 in BiColor Ha & OIII

Technical card

Resolution: 4356x3485

Dates:Nov. 7, 2017Nov. 8, 2017

Astrodon Ha 5nm: 63x240" (gain: 139.00) -20C bin 1x1
Astrodon OIII 3nm: 62x240" (gain: 139.00) -20C bin 1x1

Integration: 8.3 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 19.04 days

Avg. Moon phase: 80.52%

Bortle Dark-Sky Scale: 6.00 job: 1873125

RA center: 334.897 degrees

DEC center: 56.043 degrees

Pixel scale: 0.649 arcsec/pixel

Orientation: 297.574 degrees

Field radius: 0.503 degrees

Locations: Backyard Red Zone Observatory, Taylor, MI, Michigan, United States

Data source: Backyard


I processed this a couple months back in the traditional Hubble Palette. I am often on the fence whether I like the traditional Hubble Palette or something more natural. Sense I live in a Red Zone, narrowband often levels the playing field for me, but often gives me limited options. A few months ago I did some experimenting and discovered a way to create a more natural look out of Ha and OIII in Photoshop. I combine the two first, then create a synthetic green channel and finally mask in additional OIII data. There are several other steps of course, but that is pretty much the simplified process.

Sharpless 132 is a faint emission nebula at the Cepheus/Lacerta border, it measures 42 x 30 arcminutes. It lies about a degree southeast of ε Cep. It can be glimpsed visually, but that takes a rich-field refractor and very dark skies. Sh2-132 lies in the field of the Cepheus OB1 association. It is related to Cep OB1, whose distance is given as 10,000 to 12,000 light-years, thus it is located in the Perseus arm of our Galaxy, and measures more than 250 light years in extent. Some photographers call it "The Lion Nebula" due to its shape (head upper left, tail to the right, four legs below). It features a conspicuous dark lane in the "head" section.



Douglas J Struble
License: None (All rights reserved)

Sky plot

Sky plot


Sh2-132 in BiColor Ha & OIII, 


            Douglas J Struble