Messier 51CAHA, Descubre Foundation, DSA, OAUV, Vicent Peris (OAUV/PixInsight), José Luis Lamadrid (CEFCA), Jack Harvey (SSRO), Steve Mazlin (SSRO), Oriol Lehmkhul, Ivette Rodríguez, Juan Conejero (PixInsight)
Full resolution (0.5"/pixel)
Telescope
Calar Alto 1.2 meter Zeiss telescope.
Camera
2Kx2K, 24 um pixel SITe
Filters
Johnson BVR and 5 nm H-alpha filters.
Exposure Time
13 hour RGB (20 min subexposures), 6 hour H-alpha (30 min subexposures).
Processing
PixInsight Core 1.6.