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Contains:  NGC 2359
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NGC 2359 – Thor's Helmet

Technical card

Dates:Jan. 14, 2019

Frames: 215x900"

Integration: 53.8 hours

Avg. Moon age: 7.60 days

Avg. Moon phase: 52.30%

Basic astrometry details job: 2466362

RA center: 7h 18' 30"

DEC center: -13° 13' 15"

Pixel scale: 0.804 arcsec/pixel

Orientation: 91.885 degrees

Field radius: 0.301 degrees

Resolution: 2245x1496

Data source: Own remote observatory

Remote source: Non-commercial independent facility


Thor’s Helmet is a popular target for astrophotographers. We all love to find shapes, and this cosmic cloud certainly ticks many boxes with the wing like appendages on the helmet, to the spooky eyes looking back from some 12000 light years away. The object spans about 30 light years across, and is believed to be in a brief pre-supernova stage of evolution. At its centre, an extremely hot Wolf-Rayet star is located, WR7. This incredible looking stellar object is located in the constellation Canis Major.

I think the object resembles a spooky alien protecting his collection of shiny stellar marbles.

The photo was created by combining both narrowband and RGB data. I wanted to retain the teal colour as so few stellar objects have this.

Exposure Details:
•Lum 65X900
•Red 40X450
•Green 16X450
•Blue 16X450
•Ha 32X1800
•OIII 25X1800
Total time 53.75 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 OIII 8.5nm Narrowband-Filter

Software Used

•CCDStack (calibration, alignment, data rejection, stacking)
•Photoshop CS 6 (Image processing)

Thanks for looking



Terry Robison
License: None (All rights reserved)

Sky plot

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NGC 2359 – Thor's Helmet, 


            Terry Robison