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NGC 5897
The globular cluster NGC 5897 imaged with an amateur telescope.
Observation data (J2000 epoch)
Class	XI
Constellation	Libra
Right ascension	15 17 24.40
Declination	−21° 00′ 36.4″
Distance	24.1 kly (7.4 kpc)
Apparent magnitude (V)	8.52
Physical characteristics
Radius	6.3' x 6.3'
Metallicity	${\displaystyle {\begin{smallmatrix}\left\end{smallmatrix}}}$ = -2.04±0.15 dex
Other designations	GCl 33, C 1514-208
See also: Globular cluster, List of globular clusters

NGC 5897 is a globular cluster in the constellation Libra. This satellite of the Milky Way, which is quite remote (located about 41,000 light years away), has a diameter of over 170 light years. With its Shapley–Sawyer Concentration Class of XI, it has very low star density even in its center.

The stars of the cluster have only 0.91% of the Sun's metallicity, while the abundance of elements produced by the alpha process is roughly 5 times larger. This means that the cluster formed in a time before the galaxy formed a disk and spiral arms. However, some of the stars are apparently younger, indicating multiple star-forming epochs.

NGC 5897 has a diameter of 12.6 arcminutes and an apparent magnitude of 8.5.

References

1. Shapley, Harlow; Sawyer, Helen B. (August 1927), "A Classification of Globular Clusters", Harvard College Observatory Bulletin, 849 (849): 11–14, Bibcode:1927BHarO.849...11S.
2. ^ "NGC 5897". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 January 2017.
3. ^ "NGC 5897". Retrieved 7 January 2016.
4. ^ Koch, Andreas; McWilliam, Andrew (2014), "The chemical composition of a regular halo globular cluster: NGC 5897", Astronomy & Astrophysics, 565: A23, arXiv:1403.1262, doi:10.1051/0004-6361/201323119, S2CID 53958921
5. "A Galactic Globular Clusters Database: NGC 5897". Retrieved 8 January 2017.

External links

• Media related to NGC 5897 at Wikimedia Commons
• NGC 5897

v t e Constellation of Libra
List of stars in Libra Libra in Chinese astronomy
Stars	Bayer α α (Zubenelgenubi) β (Zubeneschamali) γ (Zubenelhakrabi) δ (Zuben Elakribi) ε ζ ζ ζ ζ η θ ι ι κ λ μ ν ξ ξ ο σ (Brachium) τ υ Flamsteed 2 3 4 5 10 11 12 16 17 18 22 23 26 28 30 36 37 41 42 47 48 49 50 30 Ser Variable HO KU KX HR 5455 HD 133112 133131 134439 134440 139139 140283 141569 141937 Other 2M1510 2MASS 1507−1627 Gliese 555 HE 1523-0901 WASP-57 WISE 1541−2250
Exoplanets 23 Librae b c γ Librae b c Gliese 581b c e WASP-189b
Star clusters NGC 5897
Galaxies	NGC 5605 5728 5792 5793 5861 5885 5890 5898 5917 Other AP IC 1059 IRAS 14348-1447 PKS 1510-089
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