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.
Tuesday, November 27, 2012
A Zoom in animation about the Veil nebula
I have done several studies about the apparent scale of several objects, to show, how large they really are in the sky. My older studies can be seen HERE (Just scroll down a bit, at the end of the page, click "Older posts" to see more.) I have imaged same targets with several focal lengths, form 200mm up to 3000mm, this time I made an animated GIF out of my material.
Veil Nebula, a supernova remnant in Cygnus
An animated zoom in series, from a four to about a 0,4 degrees field of view
Note. A size of the Moon is marked as a white circle, at the center of the images.
The apparent size of the Moon is ~30', that's equal to 0,5 degrees.
Images used in this animation can be seen here:
http://www.astroanarchy.blogspot.fi/2012/11/veil-nebula-collection-as-poster.html
Monday, November 26, 2012
IC 5146
This is a start of the imaging project. I shot 9 x 1200 s. (3h) H-alpha light for this emission nebula. IC 5146 , the Cocoon Nebula, is a star formation area and locates in constellation Cygnus at distance of about 4000 light years. There is a reflection component but due to narrowband technique used, it's not visible in this Hydrogen emission image. I'll shoot other cahnnels, S-II and O-III, for this later.
IC 5146, the Cocoon Nebula
In constellation Cygnus
Image shows the emission of ionized Hydrogen
Technical details:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Levels and curves 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
9 x 1200s exposures for the H-alpha, emission of ionized Hydrogen = 3h
Sunday, November 25, 2012
An experimental 3D-animation of the IC 410
Since the Weather doesn't support new images, I'm publishing some experimental work here.
I have tested a new method to publish my 3D-images as a form of Lenticular prints.
For this technique to work, I need series of images from different angles, in this case 24 images are needed.
Lenticular printing is actually an old technique but in past few years it has become much more sophisticated.
The results can be stunning visually, image plane disappears and object floats in and outside of the frame.
Since astronomical objects are too far away, no real parallax can be imaged. Doe to that, I have developed a method to turn my images to various 3D-formats. My work flow is based on scientific data from the object, distance and the source of ionization are usually known. The different types of the nebulae has typical structures, pillar like formations must point to the source of ionization, the radiation pressure forms kind of hollow area, inside of the nebula, around newly born stars, dark nebulae must be at front of the emission ones to show, etc... rest of the missing information is then replaced with an artistic vision.
The whole process is pretty much like sculpting!
The IC 410 in Auriga as an animation
Only real elements from the original 2D-image are used for the animation
NOTE! Let the animation load, ~5MB
This is a personal vision about forms and shapes, based on some known facts and an artistic impression.
2D-image of IC 410
A study about the apparen scale in the sky
Second animatio, Flying in and out
NOTE! Let the animation load, ~5MB
This is a personal vision about forms and shapes, based on some known facts and an artistic impression.
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