Terzan 2
Globular cluster
From Wikipedia, the free encyclopedia
Terzan 2 (also known as ESO 454-29) is a heavily obscured globular cluster located in the constellation of Scorpius.[4] It was discovered by the French astronomer Agop Terzan in the 1967.[5]
| Terzan 2 | |
|---|---|
Terzan 2 imaged by the Hubble Space Telescope | |
| Observation data | |
| Constellation | Scorpius |
| Right ascension | 17h 27m 33.24s[1] |
| Declination | −30° 48′ 7.8″[1] |
| Apparent magnitude (V) | 14.29 |
| Apparent dimensions (V) | 0.6′ |
| Physical characteristics | |
| Radius | 100-200[2] |
| Metallicity | [Fe/H] = [Fe/H]= −0.84 ± 0.04[3] dex |
| Other designations | Terzan 2, Haute-Provence 3, ESO 454-29, VDBH 228, GCl 64.1[1] |
Terzan 2 is a metal-rich globular cluster located in the Milky Way's galactic bulge. The orbit of the cluster is chaotic.[3] Each pass through the galactic bar, it is disrupted and sent in a slightly different path, meaning it never has a clear enough path to create a stable orbit. The structure of the cluster is itself chaotic, with both retrograde and prograde motion observed in the movement of its stars.[3] Low mass X-ray binary 4U 1724-307 is also located in Terzan 2.[6]
