North America Nebula (NGC 7000)
The northern part of Cygnus is an area particularly rich in clouds of hydrogen gas. Ionized by the intense UV radiation of embedded stars, it emits light at the characteristic wavelengths of the Balmer series, the most intense one being the red Ha line at 656 nm. Due to interstellar dust, the field stars are also reddened.|
The most prominent features are the North America and Pelican nebulae,shaped by luminous Ha regions and dark dust clouds.
Other CCD images of this region: HαRGB image and a Hα mosaic
|Instrument||:||Minolta 1.7/50 mm lens, stopped down to f/3.5 and mounted with a home-made adapter|
|Camera||:||Starlight Xpress SXV-H9 CCD camera|
|Filter||:||Astronomik RGB, B channel additionally with IDAS LPS filter|
|Date||:||18 Oct. 2003|
|Exposure||:||RGB: 3x6 min each|
|Sites||:||near Baruth, Brandenburg, Germany|
|Processing||:|| No dark and flat frames.
Bias subtraction and digital development: IRAF;
color processing: Gimp
|RGB combine ratio||:||1.0:1.0:1.6|