М100 < М101 > М102 ...
Spiral galaxy M101
Spiral galaxy M101 or Pinwheel galaxy is in the constellation Ursa Major (UMa).
Equatorial coordinates (epoch J2000):
Visual magnitude: 7,7m
Optimum magnification for a telescope with observations of M101, depending on the aperture of the telescope (D), is about D/6-D/3. Higher magnifications of course add details, but lead to a strong drop in the brightness of the image, making it difficult to observe.
Nikolay Kurdyapin, astro-map.com
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