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... М80 < М81 > М82 ...
Spiral galaxy M81
Spiral galaxy M81 or Bode's galaxy is in the constellation Ursa Major (UMa).
Equatorial coordinates (epoch J2000):
Visual magnitude: 6,8m
Optimum magnification for a telescope with observations of M81, depending on the aperture of the telescope (D), is about D/6-0.8D. 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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