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Contains:  NGC 1027, IC 1805, IC 1795, NGC 896
Getting plate-solving status, please wait...

Heart Nebula (IC 1805, Sh2-190)

Technical card

Resolution: 4344x3396

Dates:Nov. 3, 2019Nov. 4, 2019Nov. 6, 2019Nov. 8, 2019Nov. 9, 2019Nov. 16, 2019Nov. 17, 2019

Chroma Ha 3nm: 28x1200" -30C bin 1x1
Chroma Ha 3nm: 2x300" -30C bin 1x1
Chroma Ha 3nm: 2x600" -30C bin 1x1
Chroma OIII 3nm: 30x1200" -30C bin 1x1
Chroma OIII 3nm: 2x900" -30C bin 1x1
Chroma SII 3nm: 26x1200" -30C bin 1x1
Chroma SII 3nm: 1x900" -30C bin 1x1

Integration: 29.2 hours

Darks: ~100

Flats: ~20

Bias: ~100

Avg. Moon age: 12.06 days

Avg. Moon phase: 70.86%

Bortle Dark-Sky Scale: 5.00 job: 3077771

RA center: 2h 33' 37"

DEC center: +61° 20' 45"

Pixel scale: 2.332 arcsec/pixel

Orientation: 358.797 degrees

Field radius: 1.786

Locations: Home Observatory, Schenectady, New York, United States

Data source: Backyard


The Heart Nebula (IC 1805, Sh2-190) is an emission nebula in the constellation Cassiopeia, located roughly 7,500 light-years away. It was discovered by William Herschel in 1787. The brightest corner of the Heart nebula is NGC 896, also know as the Fish Head Nebula, on the Western side of the Heart.

A surprise to me was finding the tiny planetary nebula WeBo1 (PN G135.6+01.0), which can be seen as the small blue structure on the left side of the image (straight left from Melotte 15). WeBo1 was discovered by Bond, Pollacco, and Webbink in 2003 originally on DSS images and it has a thin-ring morphology. Its shape is elliptical with major and minor axes of about 64"x22".

The image was created from 29 hours of narrowband Ha, OIII, SII data in the Hubble color palette.



Luca Marinelli
License: None (All rights reserved)



Slight curve adjustment to open up midtones.

Sky plot

Sky plot


Heart Nebula (IC 1805, Sh2-190), 


            Luca Marinelli