Celestial hemisphere:  Northern  ·  Constellation: Perseus (Per)  ·  Contains:  Double cluster  ·  NGC 869  ·  NGC 884  ·  NGC 957  ·  The star 7Per  ·  The star 8Per
Double Cluster, John Corban
Double Cluster
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Double Cluster

Double Cluster, John Corban
Double Cluster
Powered byPixInsight

Double Cluster

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Description

The open star clusters NGC 869 and NGC 884 form the famous Double Cluster in Perseus. It was first cataloged by the Greek astronomer Hipparcos in 130 B.C. For unknown reasons, Messier did not include the Double Cluster in his famous catalogue.

Both clusters are also blue-shifted, with NGC 869 approaching Earth at a speed of 22 km/s and NGC 884 approaching at a similar speed of 21 km/s.

~ from SkySafari

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Double Cluster, John Corban