This is a widefield view of Sh2-188:

The nebula is actually an asymmetrical planetary nebula. It is located about 850 light years from us in the constellation Cassiopeia. There’s not much information available about this nebula.

Acquisition and Processing

I acquired this image using Telescope Live’s Takahashi FSQ-106ED, and using narrowband filters.

The following are the acquisition details

  • H-alpha: 10 minutes, binned 1×1
  • SII: 10 minutes, binned 1×1
  • OIII: 10 minutes, binned 1×1

I processed this image using PixInsight and Photoshop.

There is a dark nebula also called the Dolphin Nebula, it is designated Barnard 252.