Narrowband Helix Nebula - Adam Lundie - Eatons Hill Observatory

Narrowband Helix Nebula

16-Aug-2016
Narrowband Helix Nebula thumbnail
Narrowband Helix Nebula
I've already done the Helix Nebula in natural colour, so I've imaged it again in narrowband. Lots of H-alpha and Oxygen-III, but barely any Sulfur-II.

Image:

  • 34x 1200s H-alpha bin1x1 + 20 flat + 50x dark + 120x bias
  • 33x 1200s SII bin1x1 + 12 flat + 50x dark + 120x bias
  • 17x 1200s OIII bin1x1 + 12 flat + 50x dark + 120x bias

Total exposure 28 hours.

Hardware:

  • Skywatcher Black Diamond ED120
  • SkyWatcher EQ8 Pro Mount
  • QSI 683-ws8 Camera @ -15C
  • Astronomik 6nm Ha, 6nm OIII, 6nm SII filters
  • Starlight Xpress Lodestar X2 Autoguider
  • Innovations Foresight On Axis Guider
  • Starlight Instruments Focus Boss II

Location:

  • Orange zone in Brisbane, Australia. (Bortle 7)
  • Imaged over 4 nights.

Software:

  • Planning & camera alignment with Aladin 9
  • Captured with AstroArt 6
  • Guiding with PHD2 + PHD_Dither
  • FocusLock live focusing
  • CCDInspector: Image analysis & rejection
  • CCDStack 2+: Calibrate, align, stack.
  • Photoshop CC: Noise reduction, shadows/highlights, high pass filter, levels, curves, combine as HSO, color balance, saturation, rotation.

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