Deep space
NGC 663
Open cluster · C10 · NGC 663
Open cluster in Cassiopeia
Photo: Hewholooks · CC BY-SA 3.0 · Wikimedia Commons
NGC 663 is a young open cluster located 8,800 light years from Earth in the constellation of Cassiopeia. It has an estimated 400 stars and spans about a quarter of a degree across the sky. It can reportedly be detected with the unaided eye, although a telescope is recommended for best viewing. The brightest members of the cluster can be viewed with binoculars. Although the listed visual magnitude is 7.1, several observers have reported higher estimates.
Description from Wikipedia (CC BY-SA 4.0).
In your sky
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Key facts
Distance
~7,200 light-years
Apparent mag.
+7.1
Apparent size
6.0′
Best seen with
Binoculars
Catalogue
C10 · NGC 663
Did you know
- Listed as Caldwell 10 in the Caldwell catalogue, also known as NGC 663.
- Found in the constellation Cassiopeia.
- Within reach of ordinary binoculars under dark skies.
