HD 149143

Content sourced from Wikipedia, licensed under CC BY-SA 3.0.

HD 149143, also named Rosalíadecastro, is a star in the constellation Ophiuchus about 239 light-years from Earth. It shines faintly at magnitude 7.89, so it’s visible only with binoculars. The star is slightly evolved and metal-rich, with about 1.1 times the Sun’s mass, 1.3 times the Sun’s radius, and a surface temperature around 6,213 K, giving a luminosity about 2.3 times that of the Sun. It’s estimated to be around 7.6 billion years old and rotates slowly (about 3.9 km/s).

As part of the IAU’s NameExoWorlds project, the star received the name Rosalíadecastro in honor of the Galician poet Rosalía de Castro; the accompanying planet was named Riosar, after the Sar River in Galicia.

The system hosts a close-orbiting exoplanet, HD 149143 b (Riosar), a hot Jupiter discovered by the N2K Consortium and independently by the Elodie metallicity-biased survey for transiting hot Jupiters. The planet orbits very close to its star, making it a short-period giant planet.