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Hemisphere:  Northern  ·  Contains:  IC 1848, IC 1871
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IC 1848 • Soul Nebula (Westerhout 5) in HOO, 


            Douglas J Struble
IC 1848 • Soul Nebula (Westerhout 5) in HOO
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IC 1848 • Soul Nebula (Westerhout 5) in HOO

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:Oct. 10, 2017Oct. 17, 2017Dec. 17, 2019Dec. 21, 2019

Astrodon Ha 5nm: 131x240" (gain: 139.00) -20C bin 1x1
Astrodon OIII 3nm: 114x240" (gain: 139.00) -20C bin 1x1
Astrodon OIII 3nm: 229x120" (gain: 200.00) -20C bin 1x1
Astronomik Ha 6nm 1.25'': 289x120" (gain: 200.00) -20C bin 1x1

Integration: 33.6 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 23.04 days

Avg. Moon phase: 43.07%

Bortle Dark-Sky Scale: 8.00

Basic astrometry details job: 3944171

RA center: 2h 55' 4"

DEC center: +60° 28' 15"

Pixel scale: 2.320 arcsec/pixel

Orientation: 189.100 degrees

Field radius: 1.175 degrees

Resolution: 3113x1898

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

Data source: Backyard


I combined data from 2017 with data I just captured at the end of 2019. Originally at the end of last year I created a SHO palette version. This time I went after a more natural HOO palette. The goal was to go even deeper on the fainter nebulosity. That is also why I kept it a bit light. I didn't want to burry the fainter structure.

The Soul Nebula (Westerhout 5) is an emission nebula in the constellation of Cassiopeia. It forms a well known pair with the nearby Heart nebula (only 2.5 degrees) called the "Heart and Soul" nebula. These nebula are in fact connected via a bridge of gas. The nebula is also known as the Embryo Nebula or IC 1848, the Index Catalogue designation of an open cluster contained within the nebula.

With an apparent size of some 150 arc minutes, the nebula's distance of 7,500 light years means it has a physical size of around 100 light years. When the Heart nebula is included, the Heart and Soul nebula span around 300 light years of space. The nebula houses a few open star clusters, their designations being CR 34, CR 632, CR 634 and IC 1848 which is also sometimes used to refer to the nebula itself. Also located near the nebula are three small emission nebulae, with designations IC 1871, IC 670, IC 669. Stellar winds from stars within the nebula are producing pillars of gas and dust that point towards the centre of the nebula. Stars are also located at their tips. These pillars are thought to be around 10 light years long. A large radio source is located in the nebulae. Designated Westerhout 5 (W5), it appears four times greater than the Moon. The appearance of the nebula in the radio portion of the electromagnetic spectrum follows a similar pattern to the optical.



Douglas J Struble
License: None (All rights reserved)

Sky plot

Sky plot


IC 1848 • Soul Nebula (Westerhout 5) in HOO, 


            Douglas J Struble