NGC 5316

open cluster in Centaurus

Key facts

Right ascension: 13 53 57
Declination: −61 ° 52 ′ 06 ″
Distance: 3,960 ly (1,215 pc )
Apparent dimensions v: 15'
Mass: 1,500 M ☉
Estimated age: 100 million years
Other designations: Collinder 279, Melotte 122
Constellation: Centaurus

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Wikidata facts

Instance of: open cluster
Constellation: Centaurus
Distance from Earth: 1215
Image: NGC 5316.png

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catalog code: [KPS2012] MWSC 2175
Commons category: NGC 5316
discoverer or inventor: James Dunlop
time of discovery or invention: 1826-05-25
apparent magnitude: 6.0
right ascension: 208.4875
declination: -61.8683
radial velocity: 9.983
epoch: J2000.0
metallicity: 0.13
right ascension component of proper motion: -5.28
declination component of proper motion: 1.82

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Encyclopedic overview

NGC 5316 is an open cluster in the constellation Centaurus. It was discovered by James Dunlop in 1826. Located approximately 4,000 light years away from Earth, it is located in the Carina-Sagittarius arm.

There are 570 probable member stars within the angular radius of the cluster and 262 within the central part of the cluster. The tidal radius of the cluster is 6.0 - 8.1 parsecs (19 - 26 light years) and represents the average outer limit of NGC 5316, beyond which a star is unlikely to remain gravitationally bound to the cluster core. The brightest member of the cluster (lucida) is star No. 31 (mag. 9.40). Star 31 has significantly more barium than the rest of the group and the Ba II line is visually stronger than the rest of the cluster. The turn-off mass of the cluster is estimated to be at 5.0 M☉. The hottest stars of the cluster are of spectral type B5–B7. NGC 5316 has metallicity nearly the same as the solar one ([Fe/H] = −0.02 ± 0.05).

Excerpted from Wikipedia’s “NGC 5316” article, available under the CC BY-SA 4.0 licence.

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