M101: The Pinwheel Galaxy | |||
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M101, the Pinwheel Galaxy in the constellation Ursa Major (the Big Dipper). This is a face-on spiral galaxy, prominantly displaying its asymmetric spiral structure. It lies approximately 27 million light years away, and is nearly twice the size of our own galaxy. | |||
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| Optics: | 8-inch Ritchey-Chretien telescope | ||
| Camera: | QHY268M CMOS camera | ||
| Exposure info: | LRGB 68/20/20/29 x 300 secs | ||
| Filters used: | Astronomik LRGB and Optolong L-Pro light pollution filter | ||
| date: | June 2022 | ||
| Processing: | Pixinsight-->Photoshop-->Topaz deNoise AI-->Lightroom; re-processed January 2024 | ||
An earlier version of this galaxy using a DSLR and a telephoto camera lens: | |||
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| Optics: | Canon 500mm lens + 1.4x teleconverter | ||
| Camera: | astro-modified Canon T5i | ||
| Exposure info: | 111 x 120-180 secs, iso 800, f/5.6 and f/8 | ||
| Filters used: | none | ||
| date: | April-May, 2015 | ||