The Crescent Nebula
NGC 6888
Narrowband

Crescent Nebula

The Crescent Nebula is located in the constellation of Cygnus. This emission nebula was formed by the stellar winds associated with it's massive Wolf-Rayet central star. Wolf-Rayet stars are very hot, very massive stars with a high rate of mass loss. This image is in Hydrogen Alpha. The open cluster IC4996 is located in the lower right corner.

There is an interesting feature to the lower right of the Crescent nebula. Click Here for a cropped view of this bubble like feature. The cropped image is taken from a 2008 Ha image.

 

Telescope: Astro-Physics 160mm EDF f7.5 @ f7.7 Designation: NGC 6888 or Caldwell
Mount: Astro-Physics AP1200GTO
Constellation: Cygnus
Camera: Apogee U16M with Gen II Astrodon Filters Distance: Approx 5000 Light Years
Guiding: SBIG ST402 via Mini Borg 60mm Type: Emission Nebula
Exposure: 420 minutes, 21 x 20 Ha Position: R.A. 20 hr 12 min , Dec +280 21'
Processed using PixInsight & PhotoShop CS6 Date: 18-26 August 2013
Acquisition: CCDAutopilot/CCDSoft/The Sky 6/M1OASYS Location: Deerlick Astronomy Village