NGC 896 in Hydrogen Alpha
Characteristics:
Magnitude: ?
Size: FOV of this image is about 1 degree.
Distance: ?
RA: 2h 25m 28s
Dec: 62 degrees 01' 10"
Description:
NGC 896 is a region of faint hydrogen alpha emission that is situated
in the northwestern corner of IC1805. This
3 hour exposure reveals many intricate details that are best seen on higher magnification.
Photographic Details:
Date: January 18, 2005
Scope: Takahashi
Sky 90 at f4.5 with field flattener/focal reducer, on the G11 Losmandy
Mount.
Autoguider: SBIG STV with
e-finder.
Camera: SXV-H9
Filter: Astronomik
Ha filter (13 nm bandpass).
Exposures: 36 x 5' each, binned
1 x 1, 3 hours total.
Conditions: Temperature 2 degrees F; above average
transparency; poor seeing; intermittent mild breeze.
Post-processing: No dark, bias, or flat frames used. Auto aligned
in
MaximDL; Sigma combined using RC Sigma Reject MaximDL, followed by DDP
in ImagesPlus (IP). Subsequent
levels and curves adjustments in Photoshop CS (16 bit format).
Final sharpening using a combination of high pass filtering followed by
unsharp mask in PS.
Please
note: Graphics on this website
may not be reproduced without author permission.
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