Gum 15 RCW 32 Hydrogen Emission Nebula - Adam Lundie - Eatons Hill Observatory

Gum 15 / RCW 32 Hydrogen Emission Nebula

22-Jan-2016
Gum 15 / RCW 32 Hydrogen Emission Nebula thumbnail
Gum 15 / RCW 32 Hydrogen Emission Nebula
Gum 15 is a cloud of hydrogen gas 3,000 light-years from Earth. It is shaped by aggressive winds flowing from the stars within and around it.

Image:

  • 29x 300s luminance bin2x2 + 12x flat + 50x dark + 120x bias
  • 14x 600s Ha bin2x2 + 22x flat + 50x dark + 120x bias
  • 24x 200s red bin3x3 + 22x flat + 50x dark + 120x bias
  • 20x 200s green bin3x3 + 24x flat + 50x dark + 120x bias
  • 21x 200s blue bin3x3 + 24x flat + 50x dark + 120x bias

Total exposure time: 8 hours 22 minutes.

Hardware:

  • Celestron EdgeHD 1100 with CGEM DX mount
  • Celestron 0.7x EdgeHD focal reducer
  • QSI 683-wsg Camera @ -15C
  • Astronomik Type 2c LRGB filters
  • Astronomik Ha 6nm filter
  • Orion StarShoot Autoguider
  • Starlight Xpress Adaptive Optics

Location:

  • Orange zone in Brisbane, Australia. (Bortle 7)
  • Imaging over 4 nights - average to above average seeing + waxing gibbous moon.

Software:

  • Captured with AstroArt 6
  • Guiding with PHD2 + PHD_Dither
  • Aladin 8.0: Planning & camera alignment.
  • CCDInspector: Image analysis & rejection
  • CCDStack 2+: Calibrate, align, normalize, stack, curves, deconvolve luminance, combine RGB.
  • Photoshop CC: Reduce noise, integrate L+Ha+RGB, high pass filter, shadows/highlights, unsharp mask, shrink stars, color balance.

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