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Contains:  NGC 1027, IC 1805, IC 1795, NGC 896
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IC 1805 Heart Nebula in BiColor Ha & OIII

Technical card

Resolution: 3068x3838

Dates:Sept. 2, 2017Sept. 3, 2017

Astrodon Ha 5nm: 158x120" (gain: 201.00) -20C bin 1x1
Astrodon OIII 3nm: 161x120" (gain: 201.00) -20C bin 1x1

Integration: 10.6 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 11.58 days

Avg. Moon phase: 88.77%

Bortle Dark-Sky Scale: 6.00 job: 1721246

RA center: 37.896 degrees

DEC center: 61.433 degrees

Pixel scale: 2.316 arcsec/pixel

Orientation: 236.902 degrees

Field radius: 1.581 degrees

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

Data source: Backyard


Now that I am getting more comfortable with narrowband, I wanted to see if I could develop a way to use the Ha, OIII and SII in a more natural way. This is a bicolor combination of Ha and OIII then creating a synthetic green channel.



Douglas J Struble
License: None (All rights reserved)

Sky plot

Sky plot


IC 1805 Heart Nebula in BiColor Ha & OIII, 


            Douglas J Struble