HD 13189

HD 13189 is a giant star of spectral type K2. It has an apparent magnitude of 7.57 mag. The mass of HD 13189 is about two to seven solar masses.

Astronomers of the Friedrich -Schiller- University Jena, published in 2005, its made ​​in the Thuringian State Observatory discovery of an object that revolves around this star and in which it could be a brown dwarf, or exoplanets.

Companion

The companion of HD 13189 was detected by a research group headed by Professor Artie Hatzes, director of the Thuringian State Observatory, by observing the periodic variations in the radial velocity of the central star. The Thuringian findings were later confirmed by the McDonald Observatory in Texas. The companion is at least 8 to 20 times more massive than the planet Jupiter, the largest planet of the solar system, and needs to revolve around 472 days. The semi-major axis of the orbit is approximately 2 astronomical units.