874-M101, the Pinwheel galaxy
M101 or NGC 5457) is a face-on spiral galaxy distanced 21 million light-years (six megaparsecs) away from Earth in the constellation Ursa Major. It is asymmetrical due to the tidal forces from interactions with its companion galaxies.
2019-03-24 to 30
20" f/4.6 telescope at the SDG Observatory of Garry Sedun in Arizona. TeleVue 3" Paracorr coma corrector and Moravian G3 16200 camera with off axis ZWO ASI 174 mini guiding camera and Optec Gemini Focusing Rotator. Mount - Paramount ME Exposures - used 12 of 28 B. 30 G, 33 of 34 L and 25 R subs each 300s with darks and bias, but no flats for calibration. Processing in Pixinsite and Photoshop.