Thursday, February 14, 2013
A new panorama from my IC 1805 material
Since I have shot several overlapping, longer focal length, images out of the IC 1805, the Heart Nebula, I'm able to stitch them together as a mosaic images.
A two frame panoramic mosaic of IC 1805 details
There are two images combined in this mosaic.
At left an unnamed trunk like formation, the original image with details can be seen here:
http://astroanarchy.blogspot.fi/2012/12/a-detail-from-heart-nebula.html
At right, a closeup image of an unnamed triangular shape, the original image with details can be seen here:
http://astroanarchy.blogspot.fi/2013/02/black-lace-detail-of-ic-1805-heart.html
The mosaic in natural colors
A 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.
Wednesday, February 13, 2013
IC 443, supernova remnant as a closeup
I have shot several times this supernova remnant in Gemini. In this image, there are three different exposure sets combined, first from the year 2010 and two others from this season. Total exposure time is now around 20h. Latest images for this target are shot at 11.02 this week, 3h of H-alpha emission.
A Gemini SNR, IC 443, the "Jellyfish Nebula"
Ra 06h 17m 13s Dec +22° 31′ 05′′
Image is in HST-palette, from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
INFO
IC 443 (also known as the Jellyfish Nebula and Sharpless 248 (Sh2-248)) is a Galactic supernova remnant (SNR) in the constellation Gemini. It locates visually near the star Eta Geminorum at distance of about 5000 light years.
IC 443 may be the remains of a supernova that occurred 3,000 - 30,000 years ago. The same supernova event likely created the neutron star CXOU J061705.3+222127, the collapsed remnant of the stellar core. IC 443 is one of the best-studied cases of supernova remnants interacting with surrounding molecular clouds
Source Wikipedia, http://en.wikipedia.org/wiki/IC_443
IC 443 in visual colors
A 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.
Older wide field images of the same target
Click for large images
A wide field image from Spring season 2012, Image info in the blog post here:
Two panel mosaic
A two panel mosaic, info in the original blogpost here:
A study about the apparent scale in the sky
Click for a large image
Note. A Moon size circle as a scale.
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
Exposures for the H-alpha, emission of ionized Hydrogen = 20h
Narrowband cahnnels for ionized Oxygen and Sulfur are taken from an older wide field image.
A single unprocessed 1200 second frame of H-a emission
A single 20 min. frame, just calibrated and stretched. Imaged with the QHY9 camera, Baader 7nm H-alpha filter and Meade LX200 12" telescope.
Tuesday, February 12, 2013
A two frame mosaic of IC 1805
This is a two frame mosaic of IC 1805, the Heart Nebula. Image shows a detail, from much large nebula complex, in natural colors. Colors are combined to a visual spectrum from emissions of ionized elements.
A detail of IC 1805 emission nebula
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.
This image in a HST-palette and technical details can be found from my previous post
http://astroanarchy.blogspot.fi/2013/02/black-lace-detail-of-ic-1805-heart.html
A study about the apparent scale in the sky
Moon size circle as a scale
Note. a Moon size circle in images as a scale.
The apparent size of the full Moon is ~30 arc minutes, that's equal to ~0.5 degrees.
Thursday, February 7, 2013
Black Lace, a detail of IC 1805, the Heart Nebula
This have been one of the worst winters for astrophotographing up here 65N. Somehow I managed to shoot six hours of H-alpha light for this target under a bad transparency, seeing was kind of good though.
Generally I'll like to shoot two or three times more exposures per target but if I'll do so, I might get only four new images per year... For the same reasons I have used my older, wide field, images as a source of color data. Naturally it's better to shoot all the color channel at same focal length but ones again, weather up here is too volatile for that.
OK, enough whining here. I proudly present the new image of IC 1805 from 5. January,
Black Lace, a detail of IC 1805, the Heart nebula
A closeup of IC 1805 in mapped colors. Edges of the triangle shape, at middle right, looks like a black lace.
Buy a photographic print from HERE
Buy a photographic print from HERE
A mosaic with Melotte 15
Since this new image of mine was overlapping with the Melotte 15 image, I made a two frame mosaic out of them.
A mapped color mosaic image shows the Melotte 15 at upper right corner.
Buy a photographic print from HERE
Black Lace in natural 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
Buy a photographic print from HERE
Orientation in the Heart Nebula
The area of interest is marked with a white rectangle.
Buy a photographic print from HERE
INFO
The "Heart Nebula", IC1805 locates about 7500 light years away in constellation Cassiopeia. This is an emission nebula showing glow of ionized elements in a gas cloud and some darker dust lanes.
In a very center of the nebula, lays Melotte 15, it contains few very bright stars, nearly 50 times mass of our Sun, and many dim ones. The solar wind, a radiation pressure, from massive stars makes the gas twist to a various shapes.
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
18 x 1200s exposures for the H-alpha, emission of ionized Hydrogen = 6h
Narrowband cahnnels for ionized Oxygen and Sulfur are taken from an older wide field images.
A single unprocessed 1200 second frame of H-a emission
single 20 min. frame, just calibrated and stretched. Imaged with the QHY9 camera, Baader 7nm H-alpha filter and Meade LX200 12" telescope.
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