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
- Distance from Earth
- 6918.310
- Image
- NGC 6791 cluster.jpg
Show 10 more facts
- right ascension component of proper motion
- -0.83
- declination component of proper motion
- 0.58
- Commons category
- NGC 6791
- time of discovery or invention
- 1853-12-00
- catalog code
- [KPS2012] MWSC 3088
- apparent magnitude
- 9.5
- right ascension
- 290.2208
- declination
- 37.7717
- radial velocity
- -47.0
- metallicity
- 0.42
Sources (1)
via Wikidata · CC0
~2 min read
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.
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