NGC 5897
NGC 5897 is a globular cluster in the constellation Libra. This satellite of the Milky Way, which is quite remote (located about 24,000 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.[3]
| NGC 5897 | |
|---|---|
 The globular cluster NGC 5897 Credit: HST | |
| Observation data (J2000 epoch) | |
| Class | XI[1] |
| Constellation | Libra |
| Right ascension | 15h 17m 24.40s[2] |
| Declination | −21° 00′ 36.4″[2] |
| Distance | 24.1 kly (7.4 kpc)[2] |
| Apparent magnitude (V) | 8.52[2] |
| Physical characteristics | |
| Radius | 6.3' x 6.3'[3] |
| Metallicity | = -1.9[4] dex |
| Other designations | GCl 33, C 1514-208[2] |
The stars of the cluster have only one per cent of the sun's metallicity,[4] which means that they were formed in a time before the galaxy formed a disk and spiral arms.
NGC 5897 has a diameter of 12.6 arcminutes and an apparent magnitude of 8.5.
References
- Shapley, Harlow; Sawyer, Helen B. (August 1927), "A Classification of Globular Clusters", Harvard College Observatory Bulletin, 849 (849): 11–14, Bibcode:1927BHarO.849...11S.
- "NGC 5897". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 January 2017.
- "NGC 5897". Retrieved 7 January 2016.
- "A Galactic Globular Clusters Database: NGC 5897". Retrieved 8 January 2017.
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