NGC6888 – Crescent Nebula in Cygnus

  • D escription: - A bright nebula in the central region of Cygnus with the Milky Way stars as the background. This is a more recent wide field view compared to my first attempt at it in the image below. We were dealing with gusty winds and bands of thin cloud that ruined some sub-exposures. Next time I plan to try longer exposures to get more of the subtle background Ha emissions in the region.

  • Telescope: Astro-Physics AP92 Stowaway with 92TCC, giving a focal length of 488mm f/5.3.

  • Camera: SBIG STT-8300M @ -35C Sensor Temperature

  • Exposure: 9 Red, 7 Green and 10 Blue sub exposures of 5min each for 130 minutes total through Baader RGB filters

  • Date: 2023-09-11 at 16C and 61%RH, during gusty winds.

  • Location: Southern Alberta Star Party near Elkwater, Alberta and Cypress Hills Dark Sky Reserve under Bortle 3 skies

  • Processed in PixInsight with NoiseXT and BlurXT, then finished in Adobe Photoshop.

NGC6888Earlier Image

  • Description: - An emission nebula in the constellation Cygnus. It is formed by the fast stellar wind of Wolf-Rayet star WR 136 running into the gas ejected earlier when it became a red giant star earlier.

  • A.K.A. - Van Gogh’s Ear, Caldwell 27

  • Camera: SBIG STT-8300M at -35C sensor temperature

  • Filter: Baader RGB

  • Scope: Astro-Physics 130EDT, 1085mm at f/8.35

  • Guiding: SBIG FW8G

  • Exposure: 8 x 10 minutes each for Red, Green and Blue

  • Location: A field near Cluny AB Canada, under Bortle 4.5 sky

  • Date: 2021-8-30

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