The Pelican Nebula In Dual Narrowband – 11/10/2018

Pelican Nebula in Cygnus – Dual Narrowband

Another Dual-Narrowband offering this time, again from last October. This is a closeup of part of the Pelican Nebula – an H2 region associated with the North America nebula in Cygnus. This area is particularly rich in Hydrogen Alpha emissions, with some lovely structure to be found. Again, the combination of the Hydrogen alpha with the OIII highlights some lovely detail. Of particular note here is a small detail at the top of the longest thinnest tendril coming off the main structure in the bottom right. If you look closely, there are some OIII jets pointing backwards, making it look like an arrow. These are produced by a newly-formed young star that’s sitting behind the dark cloud, so even though we cannot see the star itself, we can see some of its effect on it’s surroundings.

Framing the Nebula…

The approximate framing of the image can be seen in the screenshot on the left, with the smaller square showing the field of view of the Atik Chip when used with the Altair 102ED refractor I used to capture it. As I’ve previously mentioned, I find SkySafari absolutely invaluable in planning an evening’s capture target(s). I’ve recently made the move to Sequence Generator Pro for my capture, due to a home-brew auto-focuser becoming part of my setup, and the currently better support for that within SGP when compared to APT. However, both are still fantastic applications, with APT offering incredible value for money.

As usual at the moment, the initial processing was done in MaximDL (stacking, stretching etc), as well as the combination of the Ha and OIII images. This was followed up with work in Photoshop, where I brought the Ha in as an additional luminance layer to preserve the detail. Final polishing then done in Lightroom CC Classic.

Here are the geeky details…

Capture and Processing Information

  • Object  – Pelican Nebula (NGC7380)
  • Constellation – Cygnus
  • Camera – Atik 314L Mono
  • Exposure – Ha – 4hrs 50min, OIII – 3hrs 25min (all 5 min subs)
  • Filters – Astronomik 12nm Ha Filter
  • Telescope – Altair Starwave 102ED
  • Mount  – Skywatcher HEQ5 with Rowan Belt Mod
  • Guidescope – Off-axis
  • Guidecam – SX Lodestar
  • Guide Software – PHD2
  • Capture Software – APT
  • Stacking and Initial Processing – MaximDL
  • Post-Processing – Photoshop CC and Lightroom CC.

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