HD_97658_b
HD 97658
Star in the constellation Leo
HD 97658 is a star with an exoplanetary companion in the equatorial constellation of Leo. The star is too dim to be seen with the naked eye, having an apparent visual magnitude of 7.76.[3] It is located at a distance of 70 light years based on parallax, but is slowly drifting closer with a radial velocity of −1.6 km/s.[6]
This is an ordinary K-type main-sequence star with a stellar classification of K1V.[5] The star has 77% of the mass and 73% of the radius of the Sun.[7] Estimates of the star's age ranges from four to six billion years.[7] It is spinning with a rotation period of around 39 days[3] and shows a magnetic activity cycle of 9.6 years, which is slightly shorter than the solar cycle. The chromospheric activity is lower than average for stars of this class.[10]
HD 97658 is radiating 35% of the luminosity of the Sun from its photosphere at an effective temperature of 5,212 K.[7] The star has a low metallicity – the atmospheric abundance of elements with a higher atomic number than helium, which explains why it lies 0.46 magnitudes below average for main sequence stars of its type.[4]