Thursday, December 19, 2024
Pansy of the Swan, Sharpless 112
My previous image was showing the Sharpless 115 an emission nebula area in Cygnus, just next to it lays another Sharpless catalog target, Sh2-112.
My new photo about Sh2-112 has O-III and S-II data from my older image of Sharpless 112 from the October 2015. The new H-alpha data is much deeper and has a higher resolution. For some reason, this target has always been very difficult to process. Details in a background are very diffused and the actual emission nebula has a vast dynamic range, from a very bright to a very dim features.
I renamed this target to a "Pansy of the Swan" since the bright nebula looks like a blooming yellow pansy.
Sahrpless112, Pansy of the Swan
Click for a full size photo, 2000x2000 pixels
A mapped color image from a light emitted by an ionized elements,
sulfur=red, hydrogen=green and oxygen=blue
sulfur=red, hydrogen=green and oxygen=blue
200% Enlarged Portion of the Photo and a Baby Fox
Click for a full size, 2000x2000 pixels
INFO
Sharpless 112 (Sh2-112) lays in the Cygnus, the area rich in Ha, approximately 5000 light years away. Its location is full of faint nebulosity, as seen in the background of my photo. The nebula is energized by a hot, young star, BD +45 3216, which emits large amounts of UV light causing the gases to glow light.
Sharpless 112 in visual colors
Click for a full size photo, 2000x2000 pixels
Visual color version of Sh2-115 glows mostly in red from a light emitted by an ionized elements,
sulfur=red, hydrogen=red and oxygen=blue, this combination is very close to a natural color palette.
sulfur=red, hydrogen=red and oxygen=blue, this combination is very close to a natural color palette.
Sh2-112 in a large context
Please, click for a large image, NOTE. 4000x5000 pixels
Sharpless 155 is marked with a white rectangle at lower left.
This is my very large mosaic photo of the whole Cygnus, more info about this massive photo
This is my very large mosaic photo of the whole Cygnus, more info about this massive photo
can be seen in this blog post, https://astroanarchy.blogspot.com/2021/12/cygnus-mosaic-gets-large.html
Technical details
Processing workflow
Image acquisition, MaximDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 27 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.
Imaging optics,
Celestron EDGE 14" with 0.7 Focal reducer
Mount,
MesuMount Mark II
Cameras,
Imaging camera Apogee Alta U9000M and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AO Active Optics @ 5hz
filters,
Astrodon 5nm H-alpha, 3nm S-II and 3nm O-III
Total exposure time 13h
H-alpha, 18 x 1200 s, binned 1x1 = 6 h
O-III,12x 1200 s, binned 2x2 = 4h
S-II, 9 x 1200 s. binned 2x2 = 3h
A single calibrated 20 min exposure of H-alpha, Bin 1x1
Click for a full size image.
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