NGC7635 Bubble Nebula
The Bubble Nebula is 5 light years across and about 11,000 light years from Earth. The "bubble" is made of H2 gas shaped by steller wind from a star in it's center. Open cluster M52 is nearby, about 1/2 degree past the top-left of the image. North is at the top.

Scope/Mount: TS-Optics PhotoLine 130mm F7 APO Refractor with Astro-Tech AREDT30 Focal-Reducer/Field-flattener, Celestron CI-700 Mount
Camera: ZWO ASI1600MMC monochrome with ZWO LRGB and Ha, Oiii, Sii filters
Guiding: QHY5L-IIM through Orion Thin OAG, PHD guiding software
Exposure: Ha:(18) 300 secs @ gain=300, Oiii:(18) 300 secs @ gain=300, RGB: each channel (10) 120 sec @ gain=139
Software: Nebulosity, Pixinsight
Comment: 09-24-2022, Tierra del Sol, CA, good conditions. Palette = HOO plus RGB for stars.