Sh2-54, Sharpless 54

This is Sh2-54, an emission nebula region in the Serpens constellation. It’s about 6200 light years away and 126 light years across. I’ve imaged the Eagle Nebula and Omega Nebula near this, but I haven’t imaged Sh2-54 before. I decided to shoot it late in its season, so I was only able to get a few hours each night – all fairly low on the western horizon. Between Aug 3 and Sep 9th, I grabbed just under 20 hours on it.

I used Siril’s OSC_Extract_HaOIII script and a 60/40 Ha/OIII split on the green channel. Stars were further processed using the SETI Astro NB to RGB stars script in PixInsight (thanks John!).

Click here for the full-sized image.

My Lightbucket imaging log is here.

Details:

  • Explore Scientific ED127
  • Hotech SCA flattener
  • STF-8300C camera with an L-eXtreme filter
  • Losmandy G11 mount on a custom BoldMFG pier
  • 119x 600sec sub-exposures (19.5 hours) from my Bortle ~5 backyard
  • Captured in NINA
  • Processed in an HOO palette with Siril, GraXpert, Photoshop, NXT & Cosmic Clarity

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