My latest deep integration of the Whirlpool Galaxy (M51) captured from Fregenal de la Sierra, Spain.

This dataset combines broadband LRGB with 15 hours of Hydrogen-Alpha to reveal star-forming HII regions across the spiral arms and in the interacting companion NGC 5195.

Gear:

RC10 Ritchey-Chrétien

QSI 660 WSG8 CCD

10Micron GM2000

Astrodon LRGB + Ha Filters

Integration:

L: 15h

R/G/B: 4h each

Ha: 15h

Total: 42h

C&C welcome!