NGC 7000 – North America
NGC7000 is famous for its shape : you can easily recognize the north America continent. It is a large ionized area in Cygnus. Some people say they can see it unaided eyes but I never saw it, even with big binocular. Its too large to be seen in a telescope. All the reddish haze is due to the H-Alpha emission line of the hydrogen spectrum at the wavelength of 656nm. Our eyes are not enough sensitive to this wavelength to easily observe objects like this. Also, internal IR-Cut filter of DSLR must be remove because it cut a large amont of H-alpha light.
13 poses de 10 minutes.
Camera : Canon EOS 1000D unfiltered
Telescope : Takahashi FSQ-106ED refractor.
Monture : Takahashi EM-200 USD3.
Guidage : Orion Starshoot Autoguider sur une lunette William Optic Zenithstar 66SD.
Température extérieur : 4 à 6°C, sans vent
Température du capteur: 8°C
Humidité : 70%
Logiciel : auto-guiding and acquisition with MaximDL, pre-processing with Iris, processing with photoshop.
Site : Restefond prairies.
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