16 Jun 2021
The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on spiral galaxy 21 million light-years (6.4 megaparsecs) away from Earth in the constellation Ursa Major. It was discovered by Pierre Méchain in 1781 and was communicated that year to Charles Messier, who verified its position for inclusion in the Messier Catalogue as one of its final entries. On February 28, 2006, NASA and the European Space Agency released a very detailed image of the Pinwheel Galaxy, which was the largest and most-detailed image of a galaxy by Hubble Space Telescope at the time. The image was composed of 51 individual exposures, plus some extra ground-based photos. On August 24, 2011, a Type Ia supernova, SN 2011fe, was discovered in M101.
Data from Telescope.Live One Click Observation, processed by Cameron Caldwell.
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Telescope: SPA-2 Officina Stellare 700 RC f8
Camera: FLI PL16803
Mount: Officina Stellare equatorial fork mount with absolute encoders and direct drives
Observatory name: IC Astronomy
Location: Oria, Almería, Spain
Coordinates: 37.4988 N,-2.42178 W
Elevation: 1250 m
Total exposure time: 1hr 30m.
Processed in DeepSkyStacker, Adobe Photoshop with Astronomy Tools Plugin, Adobe Lightroom.
Full quality on AstroBin: https://www.astrobin.com/4zrehs/
M101
13 credit
Filter | Avg Exp (s) | Total Exposure | Subframes |
|---|---|---|---|
| Luminance | 211 | 3h42m | 63 |
| Blue | 150 | 2h38m | 63 |
| Green | 143 | 2h30m | 63 |
| Red | 153 | 2h38m | 62 |
| Halpha | 29 | 30m | 62 |