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Sunday, September 11, 2011

Cygnus Treasures

A collection of objects in constellation Cygnus.
All images are in HST-palette from the emission of ionized elements, R=Sulfur, G=Hydrogen & B=Oxygen.
Note. Images 1,2,3,5,9 are in same scale as a group (300mm Tokina lens @ f2.8). Closeup images, 4,6,7,8 are in same scale. (Meade LX200 GPS 12" reduced to f4,65)

I made this image since I haven't have an opportunity to do any imaging yet, due the weather. We have couple of hours of astronomical darkness now and my first targets will be locating in constellation Cygnus.
Original image is really large, since I kept all the images in native resolution, 11.000 x 12.000 pixels!

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. Star colors are mixed from the NB channels, Red=H-a, G=O-III and B= 85%O-III + 15%H-a.This composition is very close to a visual spectrum. 

Images from upper Left to a lower Right corner:

1. Wide field image of NGC6888, the "Crescent Nebula"
2. Wide field image of the "Butterfly Nebula"
3. Wide field image of the Sharpless 101, the "Tulip Nebula"
4. Closeup of the NGC6888, "Crescent Nebula"
5. "Veil Nebula", a supernova remnant
6. Closeup of the Sharpless 101, the "Tulip Nebula"
7. Closeup of the NGC7000, the "North America Nebula"
8. Closeup of the "Pelican Nebula"
9. Wide field image of the North Ameriac and the Pelican Nebulae.

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