Tuesday, February 15, 2011
Caldwell 49, the "Rosette Nebula" as an anaglyph Red/Cyan 3D
You'll need Red/Cyan Eyeglasses to be able to see this image right.
Note, if you have a Red and Blue filters, you can use them! Red goes to Left eye.
Other 3D-formats:
Original 2D:
NOTE! This is a personal vision about forms and shapes, based on some known facts and an artistic impression.
Caldwell 49, the "Rosette Nebula"
"Rosette Nebula"
Ra 06h 33m 45s Dec +04° 59′ 54″
Image is in HST-palette, (HST=Hubble Space Telescope)
from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
Star colors are mixed from the NB channels, Red=H-a, G=O-III and B= 85%O-III + 15%H-a.
This image is from two nights, 09.02 and 13.02. It was very cold, about -25C, at both nights.
I had an orthogonality problem with QHY9 and the Tokina AT-X 300mm f2.8 lens. The problem is now fixed and the optical axle and the CCD are now perfectly perpendicular to each others.
The Rosette Nebula (also known as Caldwell 49) is a large, circular H II region located near one end of a giant molecular cloud in the Monoceros. The open cluster NGC 2244(Caldwell 50) is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula's matter. The cluster and nebula locates at a distance of about 5,200 light years from Earth. The diameter is about 130 light years.
The radiation from the young stars ionized the atoms in the nebula, causing them to emit light, typical to each element, producing the visible nebula. Stellar winds, radiation pressure, from a group of stars cause compression to the interstellar clouds, followed by star formation in the nebula. This star formation is currently still ongoing.
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.
The scale
In this image, there is a full Moon placed as a scale.
The diameter of the full Moon is about 30', 0.5 degrees.
Image area is about 193', 3,2 degrees, wide.
The scale
The diameter of the full Moon is about 30', 0.5 degrees.
Image area is about 193', 3,2 degrees, wide.
An older, wider view, mosaic image of the Rosette area.
Colors for the new image are taken from this older capture.
Technical information in original blog post:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 20 iteration, added at 50% weight.
Levels, curves and color combine in PS CS3.
Equipments:
Tokina AT-a 300mm f2.8 @ f2.8
Platform and guiding, Meade LX200 GPS 12" @ f5
Camera, QHY9
Guider, Lodestar
Image Scale, 3,83 arcseconds/pixel
Exposures:
Baader H-alpha 7nm 15x1200s, binned 1x1 (5h)
Other channels are from an older image:
A closeup of the Rosette Nebula from Spring season 2010
Original blog post with a technical details:
Thursday, February 10, 2011
IC 1848, the "Soul Nebula"
IC 1848, the "Soul Nebula"
Ra 02h 51m 36.24s Dec +60° 26′ 53.9"
from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
Star colors are mixed from the NB channels, Red=H-a, G=O-III and B= 85%O-III + 15%H-a.
It was clear last night for a while. I have shot lots of longer focal length images at last couple of winters.
This time I used a Tokina AT-x 300mm camera lens at full aperture, f2.8, coupled with a QHY9 astronomical camera. This lens delivers image with a spatial resolution of 3,83 arc seconds/pixel and the field of field is
213' x 159' (3,55 x 2,65 degrees). There is now a QHY filter wheel attached, focusing is done by the FocuMax software and a DIY focusing mechanism for camera lenses. Image of it can be seen here:
I had lots of problem with this image. First of all, the CCD was not perfectly perpendicular to an optical axle,
I'll fix that tonight. Secondly my old Meade has some looseness in Ra mechanism, I think it's simply worn out, guiding was very jumpy due that.
Soul Nebula, (Sh2-199, LBN 667) is an emission nebula in constellation Cassiopeia. IC 1848 is a cluster inside Soul Nebula. Distance is about 7.500 light years. This complex is a Eastern neighbor of IC 1805, the "Heart Nebula" and they are often mentioned together as Heart and Soul.
Here is an older image, showing both objects:
Colors for this new image are taken from this older image.
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 20 iteration, added at 50% weight.
Levels, curves and color combine in PS CS3.
Equipments:
Tokina AT-a 300mm f2.8 @ f2.8
Platform and guiding, Meade LX200 GPS 12" @ f5
Camera, QHY9
Guider, Lodestar
Image Scale, 3,83 arcseconds/pixel
Exposures:
Baader H-alpha 7nm 11x1200s, binned 1x1
Other channels are from older image:
An image showing the size of this object compared to a full Moon.
(Full moon has a diameter of 30', that's 0,5 degrees)
Two older closeup images of the Soul Nebula.
Monday, February 7, 2011
A Supernova Remnant poster
A collection of Supernova remnants in scale
Note! There is now an image of a full Moon as a scale.
I made this poster to show relative sizes of the Supernova remnants. All SNR's in this poster are in same scale.
A full size image, or if an image is smaller, an image holder( dark gray), covers 259' horizontally (4,3 degrees)
NOTE, there are zoomed versions from M1 and IC 443, they are not in scale, the smaller versions of them are in scale with rest of the images.
Images are in HST-palette, mixed from the emission of ionized elements, Sulfur, Hydrogen Oxygen, by a a following method:
Red = S-II, Green = H-alpha and Blue = O-III
A supernova remnant (SNR) is the structure resulting from the gigantic explosion of a star.
The supernova remnant is an expanding shock wave and consists of ejected material expanding from the explosion.
There are two possible routes to a supernova:
There are two possible routes to a supernova:
1. A massive star may run out of fuel and collapsing inward under the force of its own gravity to form a neutron star or a black hole.
2. A white dwarf star accumulate material from a companion star until it reaches a critical mass and undergoes a thermonuclear explosion.
Images, from top Left to a bottom Right
Click thumbnails for large images, technical data behind links
Simeis 147 aka Sh2-240:
http://astroanarchy.blogspot.com/2011/01/reprocessed-supernova-remnants.html (scroll down a bit)
Veil Nebula;
M1, the "Crab Nebula":
IC 443, the "Jellyfish Nebula":
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