The Helix Nebula

Located in Aquarius, the Helix Nebula is one of the best and largest planetary nebulae in the entire sky. It appears large in size, due to its relative proximity; and it has a very low surface brightness which can make it look ghostly.

Object Details:

NGC 7293, Caldwell 63.
Visual magnitude: +7.6.
Apparent diameter: 14.7 x 12.0 arc-min. (about 0.5 LD).
Actual diameter: 3.4 light years.
Distance: 790 light years.


Exposure: 3 x 4 min, ISO 2000.
Date: 2017-09-24.
Location: The Oaks, NSW.
Sky: semi-dark rural sky, clear.
Processing: Canon DPP, Deep Sky Stacker and GIMP.
Cropping: no.
Obtained during a Macarthur Astronomical Society field night.

Imaging telescope: Skywatcher Esprit 120ED Super APO triplet refractor.
Focal length: 840 mm, focal ratio: f/7.
Imaging camera: Canon EOS 60D.
Guiding telescope: Orion ShortTube 80mm Achromatic doublet refractor.
Focal length: 400 mm, focal ratio: f/5.
Guiding camera: Orion StarShoot camera.
Guiding control software: PHD2.
Telescope mount: SkyWatcher EQ6-R.
Polar aligning: QHYCCD PoleMaster.
Field flattener: yes; filter: no.
My gear.


Image © R.Powell



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