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NGC 559

Open Cluster Fair (39/100)
NGC 559 OpenCluster Cas Visible Level 1 Naked eye / Binoculars - Wide field preferred
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Properties

Magnitude 9.5
Angular Size 9.0′
Cl, B, pL, pRi

Position & Identifiers

RA 01h 29m 30.0s
Dec +63° 17' 60.0"
Constellation Cas
Catalog NGC 559

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108x TFOV: 0.5° Lim. mag: 13.3
N E

NGC 559 · 9.0′ diameter · N up, E left

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About NGC 559

Description

NGC 559 is a moderately rich open cluster in Cassiopeia, about 3,700 light-years away. It contains roughly 100 stars spread across 4 arcminutes, with the brightest members at about magnitude 10.

Observing Tips

Requires at least a 4-inch telescope to resolve. Located in the rich Milky Way star fields of Cassiopeia. Medium magnification (80-120x) works best. Circumpolar from northern mid-latitudes, best placed in autumn evenings.

History

Discovered by William Herschel on November 9, 1787. It is one of many open clusters Herschel cataloged in the star-rich region of Cassiopeia.

Fun Facts

NGC 559 is estimated to be about 200 million years old, making it a middle-aged open cluster. Studies have identified several red giant stars among its members.