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IC 1805 • Sh2-190 • Heart Nebula in SHO, 


            Douglas J Struble

IC 1805 • Sh2-190 • Heart Nebula in SHO

Technical card

Dates:Sept. 2, 2017Sept. 3, 2017Sept. 5, 2017Nov. 23, 2019Nov. 25, 2019Dec. 6, 2019

Astrodon Ha 5nm: 158x120" (gain: 201.00) -20C bin 1x1
Astrodon OIII 3nm: 210x120" (gain: 200.00) -20C bin 1x1
Astrodon OIII 3nm: 161x120" (gain: 201.00) -20C bin 1x1
Astrodon SII 3nm: 183x120" (gain: 201.00) -20C bin 1x1
Astronomik Ha 6nm 1.25'': 192x120" (gain: 200.00) -20C bin 1x1
Astronomik SII 1.25" 6nm: 238x120" (gain: 200.00) -20C bin 1x1

Integration: 38.1 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 16.81 days

Avg. Moon phase: 60.27%

Bortle Dark-Sky Scale: 7.00

Basic astrometry details job: 3265032

Resolution: 2836x4108

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

Data source: Backyard


I captured 16.7 hours of data back in 2017 and wanted to add on to it this year pulling out some of the fainter nebulosity. There is a little blue, what I believe is a small planetary nebula towards the top, which I always found interesting.

The Heart Nebula, IC 1805, Sharpless 2-190, lies some 7500 light years away from Earth and is located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. It was discovered by William Herschel on 3 November 1787. It is an emission nebula showing glowing ionized hydrogen gas and darker dust lanes.

The brightest part of the nebula (a knot at its western edge) is separately classified as NGC 896, because it was the first part of the nebula to be discovered. The nebula's intense red output and its morphology are driven by the radiation emanating from a small group of stars near the nebula's center. This open cluster of stars, known as Melotte 15, contains a few bright stars nearly 50 times the mass of our Sun, and many more dim stars that are only a fraction of our Sun's mass.



Douglas J Struble
License: None (All rights reserved)


IC 1805 • Sh2-190 • Heart Nebula in SHO, 


            Douglas J Struble

In these public groups

Sharpless2 Objects