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Contains:  IC 59, IC 63, The star Navi (γCas), gamma Cas nebula
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The Ghost of Cassiopeia - IC 63 & 59, 


            Luca Marinelli
The Ghost of Cassiopeia - IC 63 & 59
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The Ghost of Cassiopeia - IC 63 & 59

Technical card

Resolution: 3202x2584

Dates:Aug. 30, 2019Aug. 31, 2019Sept. 1, 2019Sept. 12, 2019

Hutech IDAS LPS-P2 36mm Filter: 566x60" (gain: 120.00) -15C bin 1x1
Astrodon Narrowband 5nm Ha: 50x360" (gain: 139.00) -20C bin 1x1

Integration: 14.4 hours

Darks: ~50

Flats: ~20

Flat darks: ~50

Bias: 0

Avg. Moon age: 4.25 days

Avg. Moon phase: 26.43%

Bortle Dark-Sky Scale: 5.00

Basic astrometry details job: 2925053

RA center: 0h 59' 55"

DEC center: +60° 52' 48"

Pixel scale: 1.797 arcsec/pixel

Orientation: 162.381 degrees

Field radius: 1.027 degrees

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

Data source: Backyard


Gamma Cassiopeiae or Navi is a blue-white, sub-giant, eruptive variable star with a magnitude that changes between +1.6 and +3.0 erratically. Both Navi and the reflection-emission nebula IC 63 are located at a distance of roughly 550 light years from us. The Ghost of Cassiopeia (IC 63) and its neighbor IC 59 are rich in hydrogen and glow red due to the intense ultraviolet radiation from Gamma Cass. The blue signal from the nebula is indicative of presence of cold interstellar dust, which reflects the strong light from Navi.

This image is a first light with the ZWO ASI294MC Pro for me. The camera has impressive dynamic range and was able to tame Gamma Cass with no ugly sensor pattern and very little in terms of reflections. After I finished processing the RGB data, I decided I wanted to pull more detail from the Ha nebulosity and collected an additional 5 hours of data with the Ha filter and a mono camera. Ha data was used to strengthen the red channel and to improve the detail in the luminance channel.

ZWO ASI294MC Pro @ -15C
Gain: 120, Offset: Not set (default)
IDAS LPS-P2 filter

ZWO ASI1600MM Pro @ -20C
Gain:139, Offset: 50
Astrodon Ha 5nm filter



Luca Marinelli
License: None (All rights reserved)


  • The Ghost of Cassiopeia - IC 63 & 59, 


            Luca Marinelli
  • The Ghost of Cassiopeia - IC 63 & 59, 


            Luca Marinelli
  • Final
    The Ghost of Cassiopeia - IC 63 & 59, 


            Luca Marinelli


Description: Adjusted Navi brightness and color.


Description: Added 5 hours of Ha with the ASI1600 camera. Ha was added both to the red channel and to luminance.

Sky plot

Sky plot


The Ghost of Cassiopeia - IC 63 & 59, 


            Luca Marinelli