The Helix Neblula - NGC7293
Orion 8" f/4 Astrograph
of the largest planetary nebula in the sky is the Helix Nebula.
Located in Aquarius, it rides high on October evenings and presents
a great target for wide field and longer focal length astrographs.
It is moderately low in surface brightness however, and even
20 minutes is only starting to record some of its outer dim features.
The main body is 15 arc minutes in size, half the size of the
Optics: 8" f/4 Newtonian Astrograph w/Baader MPCC Coma Corrector
Platform: Homemade GEM with Byers Starmaster Drive
Camera: Hutech Modified Canon XTi @ ISO800
Exposure: 4 x 5m
Location: Happy Jack, Arizona
Elevation: 6850 ft.
Sky: Seeing 8/10, Transparency 8/10
Outside Temperature: 45F
Processing Tools: Photoshop CS2, Maxim DL6
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