Sh2-157 Lobster Claw Nebula
The Sh2-157 Lobster Claw Nebula is an emission nebula located about 11,000 light-years from Earth. It is a combination of Ha gases shown in gold, and Oiii gases shown in blue, stretching 200 light-years across.  The small bright region just to the top-left of center is Sh2-157a Lyn's Bright Nebula. Open cluster NGC 7510 can be seen at the bottom-right. North is to the right.

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 Deluxe OAG, PHD guiding software
Exposure: Ha:(18) 300 secs @ gain=300, Oiii:(18) 300 secs @ gain=300, RGB: each channel (10) 120 sec @ gain=200
Software: Nebulosity, Pixinsight, NoiseXterminator
Comment: 10-05-2024, Tierra del Sol, CA, good conditions. Palette = HHO plus RGB for stars.