Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  IC 1795  ·  NGC 896
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IC 1795 the Fishhead Nebula in Cassiopeia, 



    
        

            Mark Wetzel
IC 1795 the Fishhead Nebula in Cassiopeia
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IC 1795 the Fishhead Nebula in Cassiopeia

Getting plate-solving status, please wait...
IC 1795 the Fishhead Nebula in Cassiopeia, 



    
        

            Mark Wetzel
IC 1795 the Fishhead Nebula in Cassiopeia
Powered byPixInsight

IC 1795 the Fishhead Nebula in Cassiopeia

Technical card

Imaging telescopes or lenses: Celestron C9.25 Edge HD

Imaging cameras: ZWO ASI 1600MM-Pro Cool

Mounts: Celestron CGEMⅡ

Guiding telescopes or lenses: Celestron C9.25 Edge HD

Guiding cameras: ZWO 174MM Mini

Focal reducers: Celestron 0.7x Focal Reducer

Software: Celestron CPWI  ·  Main Sequence Software Seqence Generator Pro 3  ·  Pleiades Astrophoto PinInsight  ·  Adobe Photoshop CC 2021 Photoshop 2021  ·  PHD 2

Filters: ZWO 36mm 7nm OIII  ·  ZWO 36mm 7nm Ha  ·  ZWO 36mm 7nm SII

Accessory: Celestron OAG


Dates:Nov. 27, 2020Nov. 29, 2020Dec. 1, 2020

Frames:
ZWO 36mm 7nm Ha: 82x300" (6h 50') (gain: 139.00) -10C bin 1x1
ZWO 36mm 7nm OIII: 89x300" (7h 25') (gain: 139.00) -10C bin 1x1
ZWO 36mm 7nm SII: 89x300" (7h 25') (gain: 139.00) -10C bin 1x1

Integration: 21h 40'

Darks: ~50

Flats: ~50

Flat darks: ~50

Avg. Moon age: 13.95 days

Avg. Moon phase: 96.86%

Bortle Dark-Sky Scale: 4.00


Basic astrometry details

Astrometry.net job: 4170971

RA center: 2h 26' 59"

DEC center: +62° 2' 9"

Pixel scale: 0.894 arcsec/pixel

Orientation: 160.082 degrees

Field radius: 0.372 degrees


Resolution: 2400x1800

Locations: Gold Canyon, Gold Canyon, AZ, United States

Data source: Traveller

Description

Gold Canyon, Arizona
November 28 – December 1, 2020

IC 1795 was captured with narrowband filters, Hydrogen-alpha (Ha), Oxygen-III (OIII) and Sulfur-II (SII). This is a false color image using the Hubble Pallet, assigning SII to Red, Ha to Green and OIII to Blue.

The Fishhead Nebula is located at the tip of the Heart Nebula in the constellation Cassiopeia. This object became an interesting image processing project. This was the first time I had success with the Starnet process tool in PixInsight to create a starless image for handling luminance. While I had a large amount of high-quality data for all three filters, the SHO combination had so much green, that after green removal, the image lacked much color. By using the ColorMask script, I was able to adjust the tones, hue and saturation in different regions. The data ended up guiding me to produce a multi-color image. I also used the HDRMultiscaleTransform and HistogramEqualization tools in PixInsight to sharpen the details of the luminance image before combining with the blurred RGB color image. I may return to this image to soften the details slightly.

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