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Constellations - Cassiopeia

Star map of Cassiopeia Cassiopeia is marked by its W-shape in the sky, with stars ranging from magnitude 2 to 3.5 marking each turn in the W. Like Ursa Major, Cassiopeia is circumpolar and can be seen all year round from northern latitudes.

Cassiopeia lies in the Milky Way; therefore, many objects such as nebulae (clouds of gas and dust) and star clusters lie within it. Scanning Cassiopeia with binoculars will reveal many of them, though the nebulae are a bit faint. Using a telescope is even more revealing.

The Open Cluster M103 is quite easy to find, as are the double stars. Try locating M52 by using the star hopping technique. The objects listed below show up well in a 6" telescope, though some are quite small or sparsely populated, as in the case of M103.

Object Magnitude Comments
M52 6.9 Open cluster 100+ stars
M103 7.4 Open cluster 25 stars
NGC663 7.1 Open cluster 80 stars
NGC457 6.4 Open cluster 80 stars

Name Mag Distance Comments
2.2 780 L/Y Variable star between 1.6 and 3.2
 Shedir 2.2 120 L/Y
 Chaph 2.2 42 L/Y
 Ruchbah 2.6 62 L/Y
 Segin 3.4 520 L/Y

Name Mag / Separation Distance
3.4 & 7.5 / 12.2" 480 L/Y
4.6 & 6.8 / 2.4" 840 L/Y

Chart if the Northern sky
Find your way to Cassiopeia

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Author: Alistair Thomson

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