Wednesday, December 5, 2012
Sharpless 112 (Sh2-112)
Yesterday, before the clouds rolled in, I got four hours of light emitted by the ionized hydrogen (H-alpha) for this target. I started this project back in 2010 but for some reason never finalized it. Total exposure time is now nine hours.
Sharpless 112
An emission nebula in constellation Cygnus
Sharpless 112 is an emission nebula in Cygnus at distance ~5500 light years.
Not a very bright one, there are lots of dim background nebulosity but my 7h of exposures for H-a is not enough to show it well.
Image in mapped colors from the light emitted by ionized elements.
Red=Sulfur, Green=Hydrogen and Blue=Oxygen.
Technical details:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Levels, curves and color combine in PS CS3.
Optics, Meade LX200 GPS 12" @ f5
Camera, QHY9
Guiding, SXV-AO, an active optics unit, and Lodestar guide camera 8Hz
Image Scale, ~0,8 arc-seconds/pixel
21 x 1200s exposures for the H-alpha, emission of ionized Hydrogen = 7h
3 x 1200s exposures for the O-III, emission of ionized Oxygen = 1h
3 x 1200s exposures for the S-II, emission of ionized Sulfur = 1h
Monday, December 3, 2012
Melotte 15 in IC 1805, project finalized
After struggling several nights with malfunctioning devices, in freezing -20 centigrade wind, I managed to collect enough data to finalize my Melotte 15 project. (I did lost skin from my finger tips, while fixing various problems out there...)
The heart of the Heart
Melotte 15 (Mel 15) Total exposures 45x1200s = 15h
Be sure to click for a full size image!
Buy a photographic print from HERE
Buy a photographic print from HERE
The interesting structure in the center of the image is a giant area of hydrogen gas that is caused to glow by the intense ultraviolet radiation from the massive stars of the Melotte 15 star cluster.
Dust and gas clouds are twisted by the pressure of the intense radiation, the solar wind.
This formation is estimated to be 7,500 light years away from Earth, North is up.
An experimental starless image to show the actual nebula better.
A closeup of Melotte 15 in mapped colors
Natural color composition from the emission of ionized elements.
R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15% Hydrogen to compensate otherwise missing H-beta emission. This composition is very close to a visual spectrum.
Buy a photographic print from HERE
A two frame panorama of IC 1805 and Mel 15
A two frame panorama of IC 1805 and Melotte 15.
Be sure to click for a full size image!
Orientation of the mosaic in the IC 1805
Buy a photographic print from HERE
Technical details:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Levels, curves and color combine in PS CS3.
Optics, Meade LX200 GPS 12" @ f5
Camera, QHY9
Guiding, SXV-AO, an active optics unit, and Lodestar guide camera 8Hz
Image Scale, ~0,8 arc-seconds/pixel
45 x 1200s exposures for the H-alpha, emission of ionized Hydrogen = 15h
Narrowband cahnnels for ionized Oxygen and Sulfur are taken from an older wide field image seen above.
Ps.
Here is the panoramic image in visual colors from the narrowband data.
Natural color composition from the emission of ionized elements, R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15%Hydrogen to compensate otherwise missing H-beta emission. This composition is very close to a visual spectrum.
Buy a photographic print from HERE
Sunday, December 2, 2012
A cosmic fertilization
IC 410, in Auriga
Ra 05h 22m 39s Dec -33° 31′ 01″
HST-palette, (HST=Hubble Space Telescope) from the emission of ionized elements,
R=Sulfur, G=Hydrogen and B=Oxygen.
Emission nebula IC 410 and an open cluster, NGC1893, inside it are located in constellation Auriga about 12.000 light years from my home town Oulu, Finland. The cloud of glowing gas is over 100 light-years across, sculpted by stellar winds and radiation from embedded open star cluster NGC 1893.
"Cosmic tadpoles" are potentially sites of ongoing star formation, they are about 10 light-years long.
Emission from sulfur atoms is shown in red, hydrogen atoms in green, and oxygen in blue hues in this false-color, narrow band composite image above.
A closeup
A closeup about "tadpoles"
An experimental starless version
Image in visual colors
Natural color composition from the emission of ionized elements, R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15%Hydrogen to compensate otherwise missing H-beta emission. This composition is very close to a visual spectrum.
Orientation
A study about the apparent scale in a sky
Note. an apparent size of the Moon is marked in the images
Note. an apparent size of the Moon is marked in the images
An experimental study about the 3D-structure
Technical details:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Levels, curves and color combine in PS CS3.
Optics, Meade LX200 GPS 12" @ f5
Camera, QHY9
Guiding, SXV-AO, an active optics unit, and Lodestar guide camera 8Hz
Image Scale, ~0,8 arc-seconds/pixel
15 x 1200s exposures for the H-alpha, emission of ionized Hydrogen = 5h
6 x 1200s exposures for the O-III, emission of ionized Oxygen = 2h
4 x 1200s exposures for the S-II, emission of ionized Sulfur = 1h 20min.
Wednesday, November 28, 2012
Melotte 15 in IC 1805
A new imaging project from the last night, Merlotte 15, the heart of the Heart nebula.
Image shows now just the emission of Hydrogen, H-alpha. I'll shoot other emission channels for the color image soon. 20 x 1200s frames, =6h 40min.
The heart of the Heart
Melotte 15 (Mel 15)
6h 40min. H-alpha light, image spans about 30 arch minutes vertically. (the angular size of the moon is ~30 arch miutes = 0,5 degrees)
The open cluster centered in this image is known as Melotte 15 . Melotte 15 is embedded within a central portion of the much larger glowing nebula identified as IC 1805.
The interesting structure in the center of the image is a giant area of hydrogen gas that is caused to glow by the intense ultraviolet radiation from the massive stars of the Melotte 15 star cluster.
Dust and gas clouds are twisted by the pressure of the intense radiation, the solar wind.
This formation is estimated to be 7,500 light years away from Earth, North is up.
A starless version
This experimental image shows the actual nebula without stars.
A closeup
Orientation image
The area of interest is marked in this older wide field HST-palette image.
A study about the scale in the sky
Click for a large image
An apparent size of the Moon is marked in the images as a scale.
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