Celestial hemisphere:  Northern  ·  Constellation: Lyra (Lyr)  ·  Contains:  NGC 6791
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NGC6791 Open Cluster, Dean Glace
NGC6791 Open Cluster
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NGC6791 Open Cluster

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NGC6791 Open Cluster, Dean Glace
NGC6791 Open Cluster
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NGC6791 Open Cluster

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Description

NGC 6791 is an open star cluster in the Lyra constellation. It was discovered by Friedrich August Theodor Winnecke in 1853. At roughly 8 billion years old, and with an Iron to Hydrogen abundance ratio that is more than twice that of the Sun, it is one of the oldest and most metal-rich clusters in the Milky Way. This is contrary to the typical rule-of-thumb where older means more metal-poor. Compounded with the fact that it has an unusually high population of stars, NGC 6791 is among the most studied clusters in the sky.

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NGC6791 Open Cluster, Dean Glace