Celestial hemisphere:  Northern  ·  Constellation: Lyra (Lyr)  ·  Contains:  NGC 6791
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NGC 6791 with TSO-72 at f/4.8 with TS-Red-279 reducer-flattener, Steven Bellavia
NGC 6791 with TSO-72 at f/4.8 with TS-Red-279 reducer-flattener
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NGC 6791 with TSO-72 at f/4.8 with TS-Red-279 reducer-flattener

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NGC 6791 with TSO-72 at f/4.8 with TS-Red-279 reducer-flattener, Steven Bellavia
NGC 6791 with TSO-72 at f/4.8 with TS-Red-279 reducer-flattener
Powered byPixInsight

NGC 6791 with TSO-72 at f/4.8 with TS-Red-279 reducer-flattener

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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. It is approximately 13,000 light years distant.

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NGC 6791 with TSO-72 at f/4.8 with TS-Red-279 reducer-flattener, Steven Bellavia

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Imaged with APT