NGC6888

This picture is taken in co-operation with Arne Danielsen, Arne used his Takahashi Epsilon f/2.8 and Paramount for a total of 24 x 300 sec. exposures. This helps to minimize noise and increase the overall SN in the picture. The object of interest in this area is usually the beautiful Crescent Nebula, shaped like a kind of jellyfish in my eyes. However focus in this picture is the newly discovered "Bubble-like" nebula where the white arrow points to. Please take a look at the picture in full-size to see the Bubble. Dave Jurasevich did the discovery in July 2008. To this date (20 oct. 2008) the nebula is still not designated.

NGC 6888, also known as the Crescent Nebula. The nebula is a shell of gas about 25 light-years across that is being energized by the strong stellar wind from the Wolf-Rayet star WR 136, the bright star at the center of the nebula. It is located in the constellation of Cygnus, the Swan. Wolf-Rayet stars are very hot, massive stars that are blowing off their outer layers, ejecting the equivalent of our Sun's mass every 10,000 years. Burning fuel at a enormous rate and near the end of its life, this star should go out with a bang in a spectacular supernova explosion.

RA 20h 14m 14s, Dec 38d 12m 53s
Pos Angle +350° 00', FL 529.2 mm, 2.88"/Pixel
Optics and mount: Takahashi FSQ106ED f/5 on Takahashi Em-200
Camera: Artemis 4021. Guided with MiniBorg 60ED and DSI pro II.
Filters: Astrodon Ha
Exposures: 15 x 600 sec. (Tom Victor) + 24 x 300 sec. (Arne)
Software: Maxim DL (Guiding, darks), Photoshop CS2.
Date: 24.09.2008