Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  IC 1795, NGC 896
Getting plate-solving status, please wait...
IC 1795 - The Fishhead Nebula in Bicolor, 


            Alan Pham
IC 1795 - The Fishhead Nebula in Bicolor

IC 1795 - The Fishhead Nebula in Bicolor

Technical card

Imaging telescope or lens:Stellarvue SV4

Imaging camera:ZWO ASI1600MM-Cool

Mount:Astro-Physics Mach1 GTO

Guiding telescope or lens:Stellarvue SV4

Guiding camera:QHY5L-II-M

Focal reducer:Astro-Tech AT2FF Field Flattener

Software:Sequence Generator ProPSPixInsightPHD2

Filters:Astrodon Ha 1.25 5nmAstrodon OIII 1.25 3nm

Resolution: 2401x3200

Dates:Jan. 21, 2019

Astrodon Ha 1.25 5nm: 268x180" (gain: 200.00) -15C bin 1x1
Astrodon OIII 1.25 3nm: 193x180" (gain: 200.00) -15C bin 1x1

Integration: 23.1 hours

Avg. Moon age: 15.09 days

Avg. Moon phase: 99.88%

Bortle Dark-Sky Scale: 7.00 job: 2754164

RA center: 36.898 degrees

DEC center: 61.956 degrees

Pixel scale: 1.598 arcsec/pixel

Orientation: 359.789 degrees

Field radius: 0.888 degrees

Locations: Home, San Jose, California, United States

Data source: Backyard


Here is a Bicolor version of the Fishhead Nebula. It was done with the same Pixel Math formulas as the ones I used for my Pacman Nebula. What do you think? Would you skip SII for this target?

For reference, here are my other versions which use all 3 channels:
SHO Version
"Natural" Version



Alan Pham
License: None (All rights reserved)

Sky plot

Sky plot


IC 1795 - The Fishhead Nebula in Bicolor, 


            Alan Pham