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Exposure: RGB 3x20:3x20:3x20 minutes
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RGB Combine Ratios: 2.27:1.00:1.26
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Telescope: Stellarvue SV80S @ f/4.9
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Mount: Meade LX200 w/ super wedge
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Camera: SBIG ST-2000XM CCD, SBIG CFW-8
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Location: My backyard in Goleta, CA
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Date/Time: August 27/28, 2003, 21:36-00:44 PDT
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Processing: Taken and reduced in CCDSoft v5. Combined
sub-exposures
with Ray Gralak's Sigma Clip. Curves/levels applied in
Photoshop.
Unsharp mask in Photoshop.
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Notes: First attempt at a straight RGB. Could have used
more
exposure. An LRGB probably would have worked better. Lots
of
stars - RegiStar counted 23761 stars!
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Name: NGC 6992, The Veil Nebula, The
Network Nebula
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Type: Supernova remnant
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Constellation: Cygnus
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Distance: 1400 light years
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Angular Diameter: 230' x 160' (total
Veil)
- About the Veil Nebula:
The Veil Nebula is what is left after a red
giant star
went supernova some 5000 years ago. The star threw off a large
amount
of matter that has been speeding away from the star at about 70
km/second.
Shown above is the eastern portion of a large circle of gas. The
entire Veil Nebula covers an area over five times that of the full moon.
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