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M101 — Pinwheel Galaxy (LRGB + Hα colour) · M101

Final LRGB + Hα colour composite — blue-white arms with hot O/B associations, pink HII knots from the Hα layer (NGC 5471 visible on the eastern edge), and the warm yellow nucleus.

Messier 101 (Pinwheel Galaxy) in Ursa Major — mono LRGB + Hα stack from Plau am See
● initialising deep-zoom…
acquisition · tap to expand
TargetM101
TypeGalaxy
RA14h 03m 12.6s
Dec+54° 20′ 56″
Captured2026-03-15
Integration~6 h
FramesL ~1.5h · R/G/B ~30m each · Hα ~2.5h
FiltersL, R, G, B, Hα (1.25")
Gain100
Sensor-10 °C
SiteKlebe, Plau am See, Mecklenburg
BortleBortle 3

Related

Messier 101 (Pinwheel Galaxy) in Ursa Major — mono LRGB + Hα stack from Plau am See
M101 — Pinwheel Galaxy (LRGB synthetic luminance) M101
Messier 101 (Pinwheel Galaxy) in Ursa Major — mono LRGB + Hα stack from Plau am See
M101 — Pinwheel Galaxy (luminance master) M101

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