M45: The Pleiades

  Catalogues M45
  Names The Pleiades; The Seven Sisters
  Type Open Cluster
  Constellation Taurus
  Season Visible in Evening Autumn & Winter; Oct - Feb
  Conversation Notes Nearby open cluster, clearly visible with naked eye. So close and large that it requires very low magnification - better in binoculars than in the telescope.

M45 is clearly visible in the winter sky - you don't need instructions on finding it, just confirmation that that object is the one we are discussing. (It's rather common to encounter people who have seen this object but think it is The Little Dipper. It does have a tiny dipper-like shape of stars, so this misunderstanding is understandable.)

In the Japanese language, this object is called "Subaru", which is why a cluster of seven stars is the logo on the grill of Subaru automobiles.

Finding M45

Look to the southern winter sky, approximately 45 degrees up from the horizon. Wide-field view of Southern winter sky, showing Orion, Taurus, and Pleiades
Find the constellation Orion, easy to locate by the distinctive "belt" of 3 close-spaced stars. Constellation Orion marked in Southern sky
Move upward and to the right of Orion, at a distance of a little more than his height, looking for a compact, bright, roughly triangular knot of stars. That is M45. M45 circled above and to the right of Orion
In binoculars or a magnifying Finder, the cluster is very pretty. Low-power, wide-field view of M45

In your telescope, you may find it actually looks worse than in the finder, because the cluster is so large that your telescope will not fit it all in the field of view.

Short-focal length telescopes such as small refractors, with wide-field eyepieces, can still show the entire cluster in its beauty.

Image showing a telescope view, uninteresting because of too much magnification

All the above images were generated with Starry Night Pro.


 
  143  accesses changed Feb 23, 2008
 
 
Copyright © 2008 Richard McDonald