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M101 (Pinwheel Galaxy)

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About this observation
Observer
Ian Rothwell
Time of observation
12/02/2018 - 03:45
Object
M101
Observing location
Bournemouth, Dorset
Equipment
SkyWatcher Explorer 150P
ZWO ASI1600MMCool Pro
ZWO EFW 1.25" x 8
Exposure
5 x each RGB 2min subs, 15 x Lum 40 sec + flats +bias. Dithered
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The Pinwheel Galaxy is a face-on spiral galaxy distanced 21 million light-years away from earth in the constellation Ursa Major.
Distance to Earth20.87 million light years
Radius85,000 light years
Apparent mass~1,000 billion M☉
Apparent size (V)28′.8 × 26′.9
Number of stars1 trillion (1012)
CoordinatesRA 14h 3m 13s | Dec +54° 20′ 57″
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