HD 109749
HD 109749 is a binary star about 206 light years away in the constellation of Centaurus.Stellar system
The primary star, HD 109749 A, is a G-type subgiant with a spectral type of G3IV, indicating it is an evolved star with a luminosity higher than that of a main sequence star. It has a mass of and a radius of. The star is shining with a luminosity of and has an effective temperature of 5,860 K. Evolutionary models estimate an age of 4.1 billion years. HD 109749 A is chromospherically inactive and has a high metallicity, with an iron abundance 78% larger than the Sun's.
The secondary star, HD 109749 B, is a K-type main sequence star with an apparent magnitude of 10.3. It has a mass of about and is located at a separation of 8.4 arcseconds, which corresponds to a projected separation of 500 AU. This star has the same proper motion as the primary and seems to be at the same distance, confirming they form a physical binary system.Planetary system
In 2005, an exoplanet was discovered around HD 109749 A. It was detected by the radial velocity method as part of the N2K Consortium. It is a hot Jupiter with a minimum mass of and a semimajor axis of 0.06 AU.
