Hemisphere:  Northern
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SH2-132 Lion-Head (HSO), 


SH2-132 Lion-Head (HSO)
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SH2-132 Lion-Head (HSO)

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

Technical card

Imaging telescopes or lenses: PlaneWave Instruments CDK 14"

Imaging cameras: Unguided

Mounts: 10 Micron GM 2000 HPS II

Guiding cameras: Unguided

Focal reducers: Planewave Instruments Reducer 0.66X

Software: Pleiades PixInsight  ·  Photoshop CS6

Filters: Baader Planetarium 2" Filter LRGB  ·  Baader Planetarium h-Alpha 2" 3.5 nm

Accessory: Unihedron Sky Quality Meter SQM-LU  ·  PlaneWave DELTA-T Controller  ·  PlaneWave EFA Kit  ·  PlaneWave 3.5" Hedrick Focuser  ·  Pegasus Astro Ultimate Powerbox V2 Ultimate Powerbox v2 UPBv2

Dates:Sept. 9, 2020

Baader Planetarium O3 2" 8.5nm: 16x600" (gain: 100.00) -15C bin 2x2
Baader Planetarium S2 2" 8nm: 9x600" (gain: 100.00) -15C bin 2x2
Baader Planetarium h-Alpha 2" 3.5 nm: 12x598" (gain: 100.00) -15C bin 2x2

Integration: 6.2 hours

Darks: ~10

Flats: ~10

Flat darks: ~10

Avg. Moon age: 21.33 days

Avg. Moon phase: 58.63%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 20.44

Temperature: 11.00

Basic astrometry details

Astrometry.net job: 3833264

RA center: 22h 17' 59"

DEC center: +56° 0' 3"

Pixel scale: 0.914 arcsec/pixel

Orientation: 56.376 degrees

Field radius: 0.698 degrees

Resolution: 4600x3015

Data source: Backyard


When planning the image framing for this composition, my aim was not to show the silhouette of the Lion itself, but I wanted to place the H region on opposition to the O region and play with color contrast.

In the beginning, I planned to replace the stars by the real colors from the RGB subs to get the real colors, but did not succeed. Still something to learn. ;)

This is the first image taken witch the 0.66 PlaneWave reducer for the CDK, which brings the scope to F 4.6. In combination with the full frame sensor of the ASI6200 you achieve a huge FOV - but also some vignetting, though the CDK 14" delivers a 70mm usable image circle.

In the end, this image was real fun to process. Little to no noise. :)



License: None (All rights reserved)

Sky plot

Sky plot


SH2-132 Lion-Head (HSO),