Sharpless 2-199 Soul Nebula

Soul Nebula (Sharpless 2-199) is emission nebulae in Cassiopeia som 7500 light years from Earth.

Below is my narrowband SII-Ha-OIII exposure of Soul Nebula represented with modified HST palette introduced by Bob Franke (http://bf-astro.com/hubbleP.htm) Click for larger image!

Details of imaging: total exposure 300min = 5h.

• Ha: 8x20min (bin2x2)
• OIII: 3x20min (bin3x3)
• SII: 4x20min (bin3x3)

Equipment:

• Imaging scope: Ikharos 102mm F7 ED doublet with 0.8x reducer / flattener
• Focal length: 572mm, F/5.6
• Camera: SBIG ST-8300M @ -20C
• Filters: Baader 2 inch SII, Ha and OIII filters

NGC 6888 Crescent Nebula

Wikipedia describes this object as follows: "The Crescent Nebula is an emission nebula in the constellation Cygnus, about 5000 light years away. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures."

Below is my narrowband exposure of Crescent Nebula represented in Ha:sG:OIII palette. Synthetic green channel sG was generated from Ha and OIII using Noel Carboni Astronomy Tools. Click for larger image!

 

Details of imaging: total exposure 260min = 4h 20min.

• Ha: 9x20min (bin1x1)
• OIII: 4x20min (bin 2x2)

Equipment:

• Imaging scope: Ikharos 102mm F7 ED doublet with 0.8x reducer / flattener
• Focal length: 572mm, F/5.6
• Camera: SBIG ST-8300M @ -20C
• Filters: Baader 2 inch SII, Ha and OIII filters