Revisiting the Lagoon Nebula with a new telescope - Adam Lundie - Eatons Hill Observatory

Revisiting the Lagoon Nebula with a new telescope.

10-Jun-2016
Revisiting the Lagoon Nebula with a new telescope. thumbnail
Revisiting the Lagoon Nebula with a new telescope.
I was lucky enough to snag a second hand 900mm refractor at a good price. I needed a bright target to test it with. The Lagoon Nebula is a giant interstellar cloud around 4077 light years away, classified as an emission nebula and as an H II region.

Image:

  • 66x 300s Luminance bin1x1 + 20 flat + 50x dark + 120x bias
  • 16x 150s Red bin2x2 + 15 flat + 50x dark + 120x bias
  • 14x 150s Green bin2x2 + 15 flat + 50x dark + 120x bias
  • 11x 150s Blue bin2x2 + 15 flat + 50x dark + 120x bias

Total exposure 7 hours 12 minutes.

Hardware:

  • Skywatcher Black Diamond ED120
  • SkyWatcher EQ8 Pro Mount
  • QSI 683-ws Camera @ -15C
  • Astronomik Typ 2c LRGB filters
  • Starlight Xpress Lodestar X2 Autoguider
  • Innovations Foresight On Axis Guider

Location:

  • Green zone in Brisbane, Australia. (Bortle 7)
  • Imaged during new moon with good seeing.

Software:

  • Planning & camera alignment with Aladin 9
  • Captured with AstroArt 6
  • Guiding with PHD2 + PHD_Dither
  • CCDInspector: Image analysis & rejection
  • CCDStack 2+: Calibrate, align, stack, deconvolution, combine RGB.
  • Photoshop CC: Reduce noise, high pass filter, minimum filter, shadows/highlights, levels, curves, combine L+RGB.

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