HD_198404
HD 198404
Star with an optical companion
HD 198404 (HR 7975) is a star in the equatorial constellation Delphinus. It has an apparent magnitude of 6.19,[2] allowing it to be faintly seen with the naked eye. Parallax measurements place the object at a distance of 395 light years[1] and it is approaching the Solar System with a heliocentric radial velocity of −21.6 km/s.[5]
HD 198404 has a simple stellar classification of K0,[3] indicating that it is a K-type star. Its enlarged diameter of 10.54 R☉[8] and its low surface gravity[7] suggest that it has evolved away from the main sequence to become a giant star.[7] HD 198404 has 3.12 times the mass of the Sun[7] and radiates at 56 times the luminosity of the Sun[9] from its photosphere at an effective temperature of 4,809 K,[10] giving it a yellowish orange hue. The star is metal enriched, having an iron abundance 48% greater than that of the Sun.[7]
HD 198404 has an optical companion located 78.2″ away along a position angle of 127° (as of 2014).[13]