NGC_5897
NGC 5897
Globular cluster in the constellation Libra
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.[3]
The stars of the cluster have only 0.91% of the Sun's metallicity,[5] while the abundance of elements produced by the alpha process is roughly 5 times larger.[4] 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.[4]
NGC 5897 has a diameter of 12.6 arcminutes and an apparent magnitude of 8.5.