Sunday, January 22, 2012
A panorama from Simeis 147 to IC 405 & 410
Panoramic image from a constellation Taurus
A three panel mosaic in HST-palette from ionized elements, Red=Sulfur, Green=Hydrogen & Blue=Oxygen. North is Right.
Image above spans about ten degrees, 600', sky horizontally, that's an area of 20 full Moons side by side.
At Left, a supernova remnant Simeis 147 (Sharpless 240). IC 405 and 410 can be seen at Right. I shot three relatively short exposures for the panorama, about an hour each, since I had shot both main objects earlier at Autumn 2011, with much longer integration time. (Technical details can be seen at end of this post.)
Total exposure time for Hydrogen alpha alone is about 20h.
Total exposure time for Hydrogen alpha alone is about 20h.
Panorama as a natural color composition
Narrowband channels combined to a visual spectrum, R=Hydrogen + Sulfur, G=Oxygen and B=Oxygen + Hydrogen. Image is in real orientation in the sky, North is up.
Technical details:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Levels, curves, color and mosaic combine in PS CS3.
Optics, Canon EF 200mm camera lens at f1.8
Camera, QHY9
Guiding, Meade LX200 GPS 12" and a Lodestar guider
Image Scale, ~4,5 arcseconds/pixel
H-a for three panels 3h.
Exposures for the Simeis 147
H-alpha 34x900s, Binned 1x1
H-alpha 14x1800s, Binned 1x1
Total exposure time for Hydrogen alpha is ~13h
O-III & S-II channels are from an older image, it can be seen here
Exposures for IC 405 & 410
New exposures H-alpha 13x900s,
S-II and O-III information are from an older image
Total exposure time for Hydrogen, ~20h
Friday, January 13, 2012
Cygnus zoom in series
Weather, up here 65N, doesn't give any support so I made an other zoom in series.
This time I'm zooming from 23x14 to 0,5x0,7 degrees of sky at the are of NGC 7000 in Cygnus.
Older series can be seen in my portfolio: http://astroanarchy.zenfolio.com/p162076373
I have shot many targets with several focal lengths.
Due that, I will publish some of my material as an image sets, with different field of view and detail levels.
The fractal nature of our universe stands out nicely by this way and it will make the orientation more easy.
Many times, it's difficult to understand the image scale of astronomical images.
Due that, I will add a Moon circle in some of the images to show the angular scale in a sky.
The full Moon has an angular size of ~30 arc minutes, that's equal to ~0,5 degrees.
Cygnus zoom in series, a study of the apparent scale in the sky.
Note. The apparent size of the full Moon is marked as a gray circle at lover Right corner.
Images are in mapped colors from emission of ionized elements, R=Sulfur, G=Hydrogen & B=Oxygen.
Location in the Sky, star map overlay
Images used in this series:
A giant, 18-panels, mosaic of the Cygnus constellation with 200mm canon EF at f1.8:
http://astroanarchy.blogspot.com/2011/12/cygnus-mosaic-18-panels-and-22-x-14.html
North America and Pelican Nebulae with 300mm Tokina AT-X at f2.8:
http://astroanarchy.blogspot.com/2011/11/ngc-7000-north-america-pelican-nebulae.html
Closeup of North America Nebula with Meade LX 200 GPS, reduced to f5 ~2000mm:
http://astroanarchy.blogspot.com/2010/09/ngc-7000-closeup-hst-palette-preview.html
Sunday, January 8, 2012
Cygnus collection as a poster
Treasures of Cygnus
I made a collection out of my images from the Cygnus constellation.
At center lays a giant 18-panels mosaic of Cygnus nebulae as a natural color composition. Surrounding closeup images, seen in large central mosaic, are in HST-palette. All images are shot with the Baader narrow band filter set, H-alpha, S-II & O-III.
Original, full resolution, poster has a massive size, ~21.000 x 16.000 pixels!
All images used in this presentation, with technical details and labels, can be found from my portfolio at:
Ps.
This mid winter has been worst I can remember up here 65N... Over two Months 100% cloud cover and it doesn't look any better in near future either. Very frustrating.
Friday, January 6, 2012
A video from Autumn 2011 images
Autumn season 2011
Three minute video, 640x480 pixels, from my images of Autu mn 2011.
(If you have a slow connection, please, hit the pause and wait movie to load)
Here is a direct link to my main work from last Autumn, a giant 18-panel mosaic of Cygnus nebulae:
http://astroanarchy.blogspot.com/2011/12/cygnus-mosaic-18-panels-and-22-x-14.html
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