М50 < М51 > М52 ...
Spiral galaxy M51
Spiral galaxy M51 or Whirlpool galaxy is in the constellation Canes Venatici (CVn).
Equatorial coordinates (epoch J2000):
Visual magnitude: 8,4m
Optimum magnification for a telescope with observations of M51, depending on the aperture of the telescope (D), is about D/6-D/2. 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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