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How to Locate the Double Cluster in Perseus
The Double Cluster in Perseus (also known as NGC 869 and NGC 884) is a great target for binoculars and small telescopes. Here are a few steps you can use for finding this deep sky gem.
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Steps
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1You will need to locate Perseus and Cassiopeia. These constellations are easy to find in the autumn and winter skies. This chart is set for the 1st of January at 8:00pm local time at 35°N.Ad -
2The star that is furthest southeast in the "W" Cassiopeia is Ruchbah. Then locate Eta Persei; this is the nearest somewhat bright star in Perseus. -
3Draw a line between Ruchbah and Eta Persei. -
4If you scan from Ruchbah towards Eta Persei with a pair of binoculars, you should be able to see two cloud-like spots. These are the Double Cluster.Ad
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Tips
- The charts make more sense if you imagine them overhead; north is towards the top of the images.
- While the Double Cluster shows up well in binoculars, it is best viewed in telescope.
- Under truly dark (rural) skies, the Double Cluster can be seen with the naked eye.
Warnings
- Since this is a winter object (for those in the northern hemisphere), be sure to dress appropriately.
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