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

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

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