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Thursday, October 25, 2018

This new photos shows the LBN 251 and companions in Cygnus


My latest photo show a busy area in Cygnus, there are not too many photos out of this area alone.
My large mosaic image of cygnus shows this object group as pow tie shaped formation.



Bow Tie of LBN 251, LBN 239 and the IC 1311
Click for a large photo

This two panel mosaic image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen. 


H-alpha emission only
Click for a large photo

This grayscale photo shows just the emission of an ionized hydrogen, H-alpha,


Closeup of LBN 239
Click for a large photo

The dense star group at bottom left is the open cluster IC 1311


Orientation in the large context
Click for a large photo

The area of interest is marked as a white rectangle 


Technical details

Processing workflow

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 @ f10 with 0,7 focal reducer for Edge HD 1100 telescope

Mount
10-micron 1000

Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AOL

Astrodon filters,
5nm H-alpha 3nm S-II and 3nm O-III

Exposure times for both panels together

H-alpha, 18 x 1200 s, binned 2x2 = 6 h
O-III, 9 x 1200 s, binned 4x4 = 3 h.
S-II, 9 x 1200 s. binned 4x4 = 3 h
Total 12 h.


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