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Monday, December 25, 2017

-Sharpless 119 in Cygnus, project finalized

I have published three photo posts about my Sharpless 119 (Sh2-119) imaging project so far.
The first one was this photo at November 8, IMAGE LINK
The second one was a two frame mosaic, IMAGE LINK
The third one was a two frame mosaic in visual colors, IMAGE LINK

We have had very few clear nights at this Autumn season. I have managed to use them all so I was able to have enough data to finalize this six panel mosaic image of Sharpless 119.

Sharpless 119 as a six panel mosaic
You really should click for a full size photo!

A very high resolution photo of Sharpless 119, original resolution is about 12.000 x 8000 pixels.
Image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen. The photo covers about six square degrees of sky. (The full Moon spans about 0,5 degrees of sky.)

An experimental starless version
Please, click for a full size photo

In this starless version the shapes in gas and dust stands out nicely

A large resolution detail from the full resolution original


Sh2-119, Sharpless 119, is a large complex of emission nebulosity in Cygnus constellation, about 2 degrees east of the North American Nebula. It is located just around 68 Cygni, a quite bright star of magnitude 5. (The most bright star in the photo) This target is not very commonly photographed due to a close proximity of brighter and well known targets, like North America and Pelican Nebulae.

A wider field image of the area with the Canon 200mm f1.8 lens
Please, click for a full size image

Sharpless 119 can be seen at lower left corner. The white rectangle shows the location of  my new mosaic photo. Sh2-119 spans about three degrees of sky horizontally. (The full Moon spans about 0,5 degrees of sky.)
This photo was taken with the Canon EF 200mm f1.8 lens and the QHY9 astrocam, Baader narrowband filter set at 2012.

An older wide field shot of Sh2-119 with the Tokina AT 300mm f2.8 lens
Please, click for a full size image

More info about this photo HERE

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

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 filter, 5nm H-alpha

Exposure times

H-alpha, 60x 1200s, binned 2x2 = 20h
O-III and S-II channels are borrowed form my older wide field photos.

1 comment:

Vincent Sauvé said...

Very nice work. Thanks for sharing.