The Double Cluster, NGC 869/884, Caldwell 14, in Perseus (Steven Bellavia)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: Double cluster · NGC 869 · NGC 884 · The star 7Per

The Double Cluster, NGC 869/884, Caldwell 14, in Perseus, Steven Bellavia

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The Double Cluster, NGC 869/884, Caldwell 14, in Perseus

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The Double Cluster, NGC 869/884, Caldwell 14, in Perseus

The Double Cluster, NGC 869 and NGC 884 , Cadwell 14, in the constellation Perseus. Both visible with the naked eye, NGC 869 and NGC 884 lie at a distance of 7500 light years. NGC 869 has a mass of 3700 solar masses and NGC 884 weighs in at 2800 solar masses; however, later research has shown both clusters are surrounded with a very extensive halo of stars, with a total mass for the complex of at least 20,000 solar masses. Based on their individual stars, the clusters are relatively young, both 12.8 million years old. In comparison, the Pleiades have an estimated age ranging from 75 million years to 150 million years. There are more than 300 blue-white super-giant stars in each of the clusters. The clusters are also blue-shifted, with NGC 869 approaching Earth at a speed of 39 km/s and NGC 884 approaching at a similar speed of 38 km/s.

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The Double Cluster, NGC 869/884, Caldwell 14, in Perseus

The Double Cluster, NGC 869/884, Caldwell 14, in Perseus

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The Double Cluster, NGC 869/884, Caldwell 14, in Perseus

The Double Cluster, NGC 869/884, Caldwell 14, in Perseus

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