Bode's Galaxy is located in the constellation Ursa Major and its light has travelled 12 million years. Messier 81 and NGC 3031 are the galaxy's catalogue names. It is visible from the northern hemisphere in spring, but because of its proximity to the north celestial pole, it can be observed at almost any time of year.
M81 is a grand design spiral galaxy, which means that it has large and well-defined spiral arms. Its diameter is about 91,000 light years, making it slightly smaller than our own galaxy, the Milky Way. The supermassive black hole at its centre is about 70 million times more massive than our own Sun. M81 is also part of our Local Group and is considered a close neighbour of the Milky Way in the Virgo Supercluster.
The dust and nebulae outside the galaxy are called galactic cirrus, which is material outside the main body of the Milky Way. This cirrus is extremely faint and is only made visible by the light of the Milky Way.
Setup
Main Deep-Sky Setup
Telescope / Camera Lens
UNC Newton 200/1000
Camera
ZWO ASI 183MM Pro
Mount
Skywatcher EQ6-R pro
Filter
Astronomik Ha (6 nm) & LRGB
Integration Time
Lum: 457 x 60s
RGB: 392 x 90s
Ha: 88 x 600s
Total: 31 h 52 min
Comments
-
Type of Main Object
Galaxy
Constellation
Ursa Major
Observation Site
Goldau, CH
Bortle Class 4
Date
16. April - 9. May 2022
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