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Submitted: September 14, 2011
Image Size: 513 KB
Resolution: 1000×667

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Comments: 18
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Views: 1,331 (5 today)

Camera Data

Make:Canon
Model:Canon EOS 1000D unfiltered
Shutter Speed:16200/1 second
Aperture:F/5.0
Focal Length:530 mm
ISO Speed:800
Software:Adobe Photoshop CS3 Windows

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NGC6888 Crescent Nebulaby *ZeSly

Photography / Animals, Plants & Nature / Weather and Sky

The Crescent Nebula, the roughly round thing in the bottom-right if the image, is an emission nebula located in the constellation Cygnus. Its form is due to a the fast stellar wind from a star colliding with and ionizing the slower moving wind ejected by the same star when it became a red giant around 400,000 years ago.

You need a very dark sky to see it and a big telescope. It is very faint and the eyes are not enough sensitive to the red light. There is only one site from where I saw it : the Col de Restefond in south-eat of France. One of the very best astronomy spot in the country. At 2500m high and far from the city lights the sky is awesome and we can see a lot of object better than anywhere else.

_{27 exposures of 10 minutes.
Camera : Canon EOS 1000D unfiltered
Telescope : Takahashi FSQ-106ED refractor.
Mount : Takahashi EM-200 USD3.
Guiding : Orion Starshoot Autoguider on a William Optic Zenithstar 66SD refractor.
Outside temperature : 2°C
Sensor temperature : 6°C
Software : auto-guiding and acquisition with MaximDL, processing with Iris.
Location : Col de Restefond, France}