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Hemisphere:  Southern  ·  Contains:  Ghost of Jupiter, NGC 3242
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The Ghost of Jupiter, 


            Terry Robison
The Ghost of Jupiter
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The Ghost of Jupiter

Technical card

Imaging telescopes or lenses: RC Optical Systems RCOS 10" Ritchey-Chrétien

Imaging cameras: SBIG STL-11000M

Mounts: AP900GTO Astro Physics

Guiding telescopes or lenses: RC Optical Systems RCOS 10" Ritchey-Chrétien

Guiding cameras: AOL + SBIG Remote Guide Head

Filters: Baader OIII Narrowband 8,5nm CCD-Filter 2" OIII 8,5nm 2''  ·  Baader Planetarium H-a  ·  Astrondon Astrodon

Accessory: FLI CW2-7 Filter wheel 7

Dates:April 22, 2018

Frames: 232x900"

Integration: 58.0 hours

Avg. Moon age: 6.94 days

Avg. Moon phase: 45.34%

Basic astrometry details job: 2024711

RA center: 10h 24' 49"

DEC center: -18° 39' 54"

Pixel scale: 0.803 arcsec/pixel

Orientation: 176.853 degrees

Field radius: 0.519 degrees

Resolution: 3868x2578

Data source: Own remote observatory

Remote source: Non-commercial independent facility


NGC 3242, is a planetary nebula located in the constellation Hydra, around 1400 to 2500 light years away. It is also known as the Ghost of Jupiter, or Jupiter's Ghost as its apparent size is similar to the Planet Jupiter. William Herschel discovered the nebula on February 7, 1785 from the Cape of Good Hope, in South Africa.

The nebula measures around two light years long from end to end, and contains a central white dwarf with an apparent magnitude of eleven. The inner layers of the nebula were formed some 1,500 years ago.

I have been collecting data on this for a few years now, from multiple cameras, and locations. So, now it was time to put it all together. It may not look like it, but this may be one of the toughest images I have attempted to process to date. The dynamic range is incredible. The red and blue gas regions to the left of the nebula are very dim, and the nebula itself very bright. There is also a lot of very dim dust throughout the full frame I wanted to keep. It gives an uneven Smokey red brown look throughout background. Both broad-band (Lum, Red Green Blue) and narrow-band (Ha, OIII) data were used to create the image to try and highlight different areas

The planetary has what looks like waves of matter blown away. This was very strong in OIII, and not present in the Ha data. Many galaxies are spread throughout the background.

Thanks for looking.

Exposure Details:
Lum 75X900
Red 27X450
Green 37X450
Blue 24X450
Ha 45X1200
OIII 38X1200
Total time 58 hours

Instruments Used:
10 Inch RCOS fl 9.1
Astro Physics AP-900 Mount
SBIG STL 11000m
FLI Filter Wheel
Astrodon Lum, Red, Green, Blue Filters
Baader Planetarium H-alpha 7nm Narrowband-Filter
Baader Planetarium O-III 8.5 Narrowband-Filter



Terry Robison

Sky plot

Sky plot


The Ghost of Jupiter, 


            Terry Robison