Credit: Jim Fordice
Astronomical and Imaging Data
| RA: | 17h 27m 33.10s |
| DEC: | -30° 48′ 08.4″ |
| MAG: | 14.29 |
| Diameter: | 0.6′ |
| Const: | Sco |
| OTA | Planewave CDK24 |
| Focal Length | 3962mm |
| Camera | QHY 600M |
| Site | Río Hurtado, Chile |
| Sky Quality | Bortle 1 |
Useful Informations
Terzan 2 is a globular cluster located within the halo of the Milky Way galaxy, in the direction of the constellation Scorpius. It is one of a dozen such clusters discovered by the Armenian astronomer Agop Terzan in the 1960s and 1970s.
Classification and Structure
Terzan 2 is a stable, tightly gravitationally bound cluster of a large population of stars. Its structure is spheroidal, a characteristic shape resulting from the intense, closely packed gravitational interactions between its member stars.
- Stellar Density: The central region of Terzan 2 is extremely dense, appearing crowded with a multitude of stars in high-resolution observations.
- Age: Like most globular clusters, Terzan 2 is considered to be a very old astronomical object, dating back to the first epochs of galaxy formation. Globular clusters are often regarded as relics that provide clues to the early formation history of the Milky Way.
- Location: As an object found in the direction of the Galactic Bulge and near the plane of the Milky Way, Terzan 2 is subject to a significant degree of interstellar dust and gas extinction. This dust absorbs and alters the starlight traveling to Earth, making accurate studies challenging, particularly in the visible spectrum. Observations of this cluster, therefore, often rely on infrared and optical data from powerful instruments like the Hubble Space Telescope to penetrate the obscuring material.
Physical Parameters
Specific detailed physical parameters for Terzan 2, such as its exact metallicity and precise distance, have historically been difficult to determine with high accuracy due to the heavy obscuration. However, as a typical globular cluster, it is generally composed of an old, relatively metal-poor population of stars. Its sheer concentration of stars suggests it contains hundreds of thousands, if not millions, of stellar members. The intense gravitational environment within such clusters also makes them significant locations for studying dynamic stellar processes, such as the formation of low-mass X-ray binaries.