2025-04-30 / Image Details (Click on image to enlarge)
galacticsights
astrophotography
Pinwheel Galaxy, M101
Technical Details
| Location | Zollikerberg, Switzerland |
| Camera | Nikon DSLR D810A |
| Telescope | TS ONTC 12" f/4 Carbon Newton |
| Optics | TS 2,5" Wynne Coma Corrector |
| Focal Length | 1140mm |
| Mount | iOptron CEM120 Center-Balanced Equatorial Mount |
| Autoguiding | MGEN3 (Dithering) |
| Focuser | Moonlite Nitecrawler |
| Image Session Control | APT - Astro Photography Tool, ASCOM Platform |
| Lights | 101 x 120s (total 3h22'), ISO-800, additional Biases, Flats, no Darks |
| Stacking Software | Pixinsight 1.9, Drizzle 1x |
| Image Processing | Pixinsight 1.9 |
2017-04-30 / Image Details (Click on image to enlarge)
"Superb seeing that evening reveals a great galaxy."
Technical Details
| Location | Zollikerberg, Switzerland |
| Camera | Nikon DSLR D810A |
| Telescope | Skywatcher Quattro 8CF 200 DS Fibre OTA Newton Carbon |
| Special Lense | Skywatcher Newtonian F4 Coma Corrector |
| Mount | Skywatcher AZ-EQ6, EQASCOM, Stellarium |
| Autoguiding | Lacerta MGEN2 (Autoguiding, Dithering und Camera Control) |
| Camera Control | Digicamcontrol (Focus, Camera Control) |
| Lights | 58 x 120s (1h56'), ISO-1600, additional Biases, Flats, no Darks |
| Stacking Software | Pixinsight 1.8 |
| Image Processing | Pixinsight 1.8 |
The Pinwheel Galaxy or M101 is a spiral galaxy like our Milky Way, but about 70 percent bigger. It is located about 21 million light years from Earth in the constellation Ursa Major. M101 is noted for its high population of H II regions, many of which are very large and bright. H II regions usually accompany the enormous clouds of high density molecular hydrogen gas contracting under their own gravitational force where stars form. H II regions are ionized by large numbers of extremely bright and hot young stars; those in M101 are capable of creating hot superbubbles. X-rays from Chandra reveal the hottest and most energetic areas due to exploded stars, superheated gas, and material falling toward black holes. Infrared data from Spitzer shows dusty lanes in the galaxy where stars are forming, while optical data traces the light from stars.