M101 Pinwheel Galaxy LRGB+H Alpha

M101 Pinwheel Galaxy LRGB+H Alpha by Harry Piper, North Watford, UK.

Harry Piper

North Watford

William Optics 71mm F5.9 refractor with Orion 50mm mini guider on HEQ5 mount. Astronomik H alpha filter, QHY LRGB filters, manual filter wheel. Atik 428EX mono CCD camera.

Galaxy M101 using LRGB and H alpha filters.
The Hydrogen Alpha data has enhanced the pink H2 regions in the galaxy. These were not obvious in the straight LRGB image.