Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5422  ·  NGC 5447  ·  NGC 5449  ·  NGC 5450  ·  NGC 5451  ·  NGC 5453  ·  NGC 5455  ·  NGC 5457  ·  NGC 5461  ·  NGC 5462  ·  NGC 5471  ·  NGC 5473  ·  NGC 5474  ·  NGC 5477  ·  NGC 5484  ·  NGC 5485  ·  Pinwheel galaxy
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M101 - The Pinwheel Galaxy, Michel Makhlouta
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M101 - The Pinwheel Galaxy

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M101 - The Pinwheel Galaxy, Michel Makhlouta
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M101 - The Pinwheel Galaxy

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Description

M101 and neighbors. I am revisiting this target almost a year later with my refractor. It feels that I am going the other way around, starting with an 8" F5 newt and ending up with an 80mm F6 apo.

Some details about the Pinwheel galaxy:

The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on spiral galaxy distanced 21 million light-years away from Earth in the constellation Ursa Major.

M101 is a large galaxy, with a diameter of 170,000 light-years. By comparison, the Milky Way has a diameter of 258,000 light years. It has around a trillion stars, a twice the number in the Milky Way. It has a disk mass on the order of 100 billion solar masses, along with a small central bulge of about 3 billion solar masses.

Source: Wikipedia

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M101 - The Pinwheel Galaxy, Michel Makhlouta