Pelican Nebula

Posted by on Jun 11, 2016

Pelican Nebula

This is a portion of the Pelican Nebula, in the constellation of Cygnus, the Swan. The "mountains" in this image are formed by an area of denser gas and dust that is slowly being eroded away by the ultraviolet radiation from nearby young, hot stars, forming what is known as an ionization front. By using special filters to isolate the light from individual chemical elements, and assigning these elements to different colors, subtle variations in the energy levels within the cloud can be brought into stark detail. Light from oxygen atoms is shown as orange, and represents the highest energy. Green represents sulphur.

Raw images:
Ha: 3 x 10min  (Tot: 30min) Bin:2x2
OIII: 3 x 10min  (Tot: 30min) Bin:2x2
SII: 3 x 10min  (Tot: 30min) Bin:2x2
Seeing: 3"

Equipment used:
ASA N12 Astrograph F/3.6
3" Wynne Corrector 0.95x
Atik 490 EX camera @-20C
No guiding

Filter:
Astrodon Ha 3nm, OIII 5nm, SII 5nm

Location/Date:
Valla Observatory (FROSON, Sweden)
September 15, 2015

Image processing:
Images calibrated and processed in AstroPix
No Calibration
Curves and levels in AstroPix
Color image with AstroPix
Noise removal with the AstroPix Noise removal tool.

Image palette:
RGB palette. Ha - Red, SII - Green, OIII - Blue

 Image information:
Scale: 0.92 arcsec/pix
FOW: 52x42 arcmin

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