M81 Bode's Galaxy
Named after its discoverer, John Bode, M81 is a relatively close 12 million light-years from Earth. The length of the galaxy is about 100,000 light-years. Interstellar dust has been detected in the spiral arms which are believed to be star formation regions. About 1/2 deg north lies M82, a smaller galaxy associated to M81 through gravity. North is at the bottom.

Scope/Mount: TS-Optics PhotoLine 130mm F7 APO Refractor with Astro-Tech AT2FF 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: L:(90) 120 secs @ gain=139, RGB: each channel (10) 120 sec @ gain=139
Software: Nebulosity, Pixinsight
Comment: 05-13-2023, Tierra del Sol, CA, good conditions.