Thursday, October 6, 2011
Sharpless 119, Sh2-119
Sharpless 119
In constellation Cygnus, Ra 21h 18m Dec +44 00'
HST-palette, (HST=Hubble Space Telescope) from the emission of ionized elements,
R=Sulfur, G=Hydrogen and B=Oxygen.
R=Sulfur, G=Hydrogen and B=Oxygen.
Sharpless 119 is a largish emission nebula in constellation Cygnus. There are not too many images of it around due the close proximity of eye catchers, North America and Pelican Nebulae. Sh2-199 locates just three degrees East from the NGC 7000, North America Nebula. A bright magnitude 5 star 68 Cygni, can be seen at very center of the image above. There are several dark globules at the Southern part of the nebula.
This image covers about three degrees of sky, that's six full Moons side by side. There are some interesting looking structures in the nebula, straight line type of gas formations, they can be seen at Five and Six a clock positions, starting from image center to almost the edge of the image above.
Image is in Natural color palette from the emission of ionized elements,
R=Hydrogen + Sulfur, G=Oxygen and B=Oxygen + Hydrogen.
(Looks much like a "wide screen version" of the Rosette Nebula.)
Technical details:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations.
Levels, curves and color combine in PS CS3.
Optics, Tokina AT-X 300mm camera lens at f2.8
Camera, QHY9 Guiding, SXV-AO @ 6,5Hz
Image Scale, 3,5 arcseconds/pixel
Exposures H-alpha 10x1200s, binned 1x1O-III 3x1200s, binned 3x3
S-II 3x1200s, binned 2x2
Total exposure time ~5h
Tuesday, October 4, 2011
The Propeller Nebula as a 3D stereo pair images
Parallel vision 3D
Cross vision 3D
Other 3D-formats:
NOTE! This is a personal vision about forms and shapes, based on some known facts and an artistic impression.
The Propeller Nebula as an anaglyph Red/Cyan 3D
3D-NOTE!
You'll need Red/Cyan Eyeglasses to be able to see images as 3D.
If you have a Red and Blue filters, you can use them! Red goes to Left eye.
As many times before, I have turned the image of Propeller Nebula, DWB 111, to an experimental 3D-study.
As many times before, I have turned the image of Propeller Nebula, DWB 111, to an experimental 3D-study.
Other 3D-formats:
NOTE! This is a personal vision about forms and shapes, based on some known facts and an artistic impression.
Monday, October 3, 2011
First light for the Autumn season 2011
Finally!!!
Last night I managed to fix my "backup camera", some soldering and tweaking was needed but it worked out.
My first target was the "Propeller Nebula" in constellation Cygnus.
DWB 111, the Propeller Nebula
Ra 20h 17m 57s Dec -+44° 09′ 20″ in constellation Cygnus
HST-palette, (HST=Hubble Space Telescope)
from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
Propeller Nebula (DWB 111, MRSL 497). This S-like formation is part of the much large area of emission nebulae in Cygnus. There are very little information around, the origin and distance of this structure is unknown. It seems to be mostly front of the associated nebula. I will make an experimental 3D-study out of this later.
A closeup from the image above.
Image is in Natural color palette from the emission of ionized elements,
R=Hydrogen + Sulfur, G=Oxygen and B=Oxygen + Hydrogen.
Technical details:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations.
Levels, curves and color combine in PS CS3.
Optics, Tokina AT-X 300mm camera lens at f2.8
Camera, QHY9 Guiding, SXV-AO @ 6,5Hz
Image Scale, 3,5 arcseconds/pixel
Exposures H-alpha 15x1200s, binned 1x1
H-alpha 10x1200s, binned 1x1
O-III 14x1200s, binned 1x1
S-II 5x1200s, binned 2x2
Total exposure time ~10h
Total exposure time ~10h
An experimental starless image shows the actual nebula better.
Ps.
It looks to me, that there is something going on at Two a clock position in this image. It could be a planetary nebula? There are nearly five hours of O-III in this image, with a fast f2.8 optics, so the emission of ionized Oxygen is not very strong. I couldn't find this feature from PN database, I must study this more later.
Here is a closeup of the area of interest
Just a stretched O-III & H-alpha channels animated
Not much, after about Five hours of exposures. There is nothing visible, about this shape, at S-II channel. Centeroid of the brightest spot is, Ra 20h 10m 39.7s Dec -+44° 12′ 01.9" and the diameter about 360 arc seconds.
UPDATE
Iiro Sairanen, from a Finnish astro group "Avaruus.fi", found this PN candidate from the Simbad database :
http://simbad.cfa.harvard.edu/simbad/sim-id?Ident=%40114921&Name=PN%20PM%20%201-320&submit=submit
It's known under a name PN PM 1-320
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