Whirlpool Galaxy (M51) - reference lights stack

- Catalog: M51
- Date: 2025-10-11
- Center: RA 202.5495°, Dec 47.1973°
- FOV: 2.3968°
- Rotation: 117.50° (PA of +Y axis)
Interacting spiral galaxy in Canes Venatici; classic grand-design target with faint tidal tails.