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Hemisphere:  Northern  ·  Contains:  IC 1795, IC 1805, NGC 1027, NGC 896
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Going Deep on the Heart Nebula in HOO • IC 1805, 


            Douglas J Struble
Going Deep on the Heart Nebula in HOO • IC 1805
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Going Deep on the Heart Nebula in HOO • IC 1805

Technical card

Imaging telescopes or lenses: Stellarvue SV70T

Imaging cameras: ZWO ASI1600MM-Cool

Mounts: Orion Atlas Pro AZ/EQ-G

Guiding telescopes or lenses: Stellarvue 50mm Guidescope

Guiding cameras: ASI224MC

Focal reducers: Stellarvue SV70T Focal Reducer

Software: PHD2  ·  Sequence Generator Pro  ·  PixInsight  ·  Photoshop CS5  ·  SkySafari Pro

Filters: Astronomik Ha 6nm 1.25''  ·  Astrodon Ha 5nm  ·  Astrodon OIII 3nm

Accessory: QHYCCD PoleMaster  ·  ZWO 8x 1.25" Filter Wheel (EFW)  ·  MoonLite CFL 2.5" Large Format Focuser

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

Astrodon Ha 5nm: 158x120" (gain: 200.00) -20C bin 1x1
Astrodon OIII 3nm: 371x120" (gain: 200.00) -20C bin 1x1
Astronomik Ha 6nm 1.25'': 192x120" (gain: 200.00) -20C bin 1x1

Integration: 24.0 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 15.68 days

Avg. Moon phase: 64.24%

Bortle Dark-Sky Scale: 8.00

Basic astrometry details job: 3250999

RA center: 2h 31' 41"

DEC center: +61° 27' 54"

Pixel scale: 2.319 arcsec/pixel

Orientation: 233.513 degrees

Field radius: 1.608 degrees

Resolution: 2836x4108

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

Data source: Backyard


With these winter months here in Michigan comes a lot of fruitless nights, so I took the time to process some data from this past Fall combined with data from 2017 into a more natural HOO palette with the goal of going deep on the Ha and adding in a little more OIII than what is natural. I really wanted to pull out more nebulosity than I have seen others do; especially around the lower fish head area.

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)

Sky plot

Sky plot


Going Deep on the Heart Nebula in HOO • IC 1805, 


            Douglas J Struble

In these public groups

Sharpless2 Objects