Q933252

Open cluster in Lyra

Key facts

Right ascension: 19 20 53
Declination: +37 ° 46.3 ′
Distance: ~13,300 ly (4078 pc)
Apparent magnitude v: +9.5
Apparent dimensions v: 16'
Estimated age: 8.46 ± 0.66 Gyr
Other designations: C 1919+377, Cl Berkeley 46, OCl 142.0, GC 4492
Constellation: Lyra

via Wikipedia infobox

Wikidata facts

Image: NGC 6791 cluster.jpg

Sources (1)

wikidata.org

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Article

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.

Age studies