Thursday, November 13, 2014
DWB-111, the Propeller nebula
The data for this object is shot at 31.10 last month but I got it processed just now.
The data for the emission of ionized Oxygen and Sulfur (O-III and S-II) is borrowed from my wide field shot of the area back from the first light image of Autumn 2011.
DWB-111, the Propeller Nebula
In constellation Cygnus, click for a large images
An experimental starless view
Info
Propeller Nebula (DWB 111, MRSL 497). This S-like formation is part of the much large area of emission nebula in constellation Cygnus. There are very little information about the origin and distance of this structure is unknown.
Image in visual colors
A wide field image of the nebula
http://astroanarchy.blogspot.fi/2011/10/first-light-for-autumn-season-2011.html
Also O-III and S-II channels are borrowed from this photo.
Orientation in Cygnus
Technical details
Processing work flow
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.
Imaging optics
Celestron Edge HD 1100 @ f7 with 0,7 focal reducer for Edge HD 1100 telescope
Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x2
Astrodon filter, 5 nm H-alpha
Exposure times
H-alpha, 12 x 1200s = 4h
O-III & S-II from an older wide field photo of mine.
O-III & S-II from an older wide field photo of mine.
A single un cropped, calibrated and stretched 20 min. H-alpha frame
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