M 101 Pinwheel Galaxy
The Pinwheel Galaxy, also known as Messier 101 or NGC 5457, is a face-on spiral galaxy distanced 21 million light years away in the constellation Ursa Major, first discovered by Pierre Méchain on March 27, 1781, and communicated to Charles Messier who verified its position for inclusion in the Messier Catalogue as one of its final entries. |
Location / Date |
Mauna Keratea Obs, Μarch 2012 |
Telescope |
GSO Richey Cretien 10" f8 |
Mount |
Sky Watcher EQ6 Pro |
Camera |
QHY9 KAF 8300 mono CCD, Temp -25 C |
Filters / Exposurea |
L 18x600 sec bin 2x, RGB 9x300sec bin 2x |
Total Exposure Time |
5,5~ hours |
Software |
Nebulosity 2 - Starry Night - EQmod, Maxim DL, Pixinshight, Photoshop CS5. |