HD 100655

HD 100655 is a yellow dwarf star located approximately 93 light-years away from Earth in the constellation Leo. It is a G3V-type star, meaning it's similar in size and temperature to our Sun, though slightly older. HD 100655 is of particular interest to astronomers because it hosts a confirmed exoplanet, HD 100655 b.

The star is slightly more massive than the Sun, possessing about 1.06 times the Sun's mass. Its effective temperature is estimated to be around 5,750 Kelvin, making it a relatively hot star. The star's luminosity is also slightly higher than the Sun's.

HD 100655 b is a gas giant exoplanet with a minimum mass of roughly 1.7 times that of Jupiter. It orbits its host star at a distance of approximately 0.36 astronomical units (AU), completing one orbit in about 158 days. This proximity to the star places it firmly within the "hot Jupiter" category of exoplanets.

The discovery of HD 100655 b was made through the radial velocity method, which detects the wobble in a star's motion caused by the gravitational pull of an orbiting planet. Precise measurements of the star's radial velocity revealed the presence of the exoplanet.

Further observations and analyses are ongoing to better characterize both the star and its exoplanet, including investigations into the planet's atmosphere and composition. The HD 100655 system contributes valuable data to the ongoing study of exoplanets and planetary system formation.