Narrow Field View of NGC 7000 in Hydrogen Alpha
Size: about 60' for this field; 3 x 2 degrees for the entire North
American Nebula region.
Distance: 1,500 light years
RA: 20h 59m 51s
Dec: 43 degrees 39' 11"
The North American Nebula is a large emission nebula in the
constellation Cygnus. It is named for its resemblance to
North America, although the "Gulf" or "Central America" section shown
also true to its namesake and perhaps the brightest region for visual
observation using a UHC filter at a dark site. The FOV of my
current imaging set-up is about 1
degree, which lends itself to capturing a detailed view of this
Date: August 26, 2004
Sky 90 at f4.5 with field flattener/focal reducer, on the G11 Losmandy
Autoguider: SBIG STV with
Ha filter (13 nm bandpass).
Exposures: 19 x 5' each, binned
1 x 1, 95
Conditions: Temperature 65 degrees F; below average
transparency; humid; average seeing; mild intermittent breeze.
Post-processing: No dark, bias, or flat frames used. Two-star aligned
in ImagesPlus; Sigma combined using RC Sigma Reject in MaximDL,
followed by DDP
in ImagesPlus. Subsequent
levels and curves adjustments in Photoshop CS (16 bit format).
note: Graphics on this website
may not be reproduced without author permission.
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