NGC 5822

open cluster in the constellation Lupus

Key facts

Right ascension: 15 4 21.(2)
Declination: −54 ° 23 ′ 5(8) ″
Distance: 2,682 ly (822.3 pc )
Mass: ~1.7 × 10 M ☉
Radius: 26.1 ± 1.3 ly (8.0 ± 0.4 pc)
Estimated age: 900 ± 100 Myr
Other designations: NGC 5822, Cr 289, ESO 176-SC 009
Constellation: Lupus

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Wikidata facts

Instance of: open cluster
Constellation: Lupus
Distance from Earth: 917
Image: NGC 5822.png

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catalog code: C 1501-541
Commons category: NGC 5822
discoverer or inventor: John Frederick William Herschel
time of discovery or invention: 1836-07-03
apparent magnitude: 6.5
right ascension: 226.1180
declination: -54.3900
radial velocity: -29.7
epoch: J2000.0
metallicity: 0.08
right ascension component of proper motion: -6.50
declination component of proper motion: -5.85

Sources (1)

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Encyclopedic overview

NGC 5822 is an open cluster of stars in the southern constellation of Lupus. It was discovered by English Astronomer John Herschel on July 3, 1836, and lies close to another cluster, NGC 5823, which suggests there may be a physical association.

NGC 5822 is an intermediate age cluster, estimated at around 900 million years old, and it is located nearby at a distance of 2,700 light years. The Trumpler class of this cluster is III 2m. It is richly populated with half the cluster members lying within an angular radius of 22.1′. The cluster is considered low mass at ~1,700 times the mass of the Sun. It has a core radius of 1.1±0.1 pc and a limiting radius of 8.0±0.4 pc.

Excerpted from Wikipedia’s “NGC 5822” article, available under the CC BY-SA 4.0 licence.

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