HD_177565
HD 177565
G-dwarf star w. a planet; Corona Australis
HD 177565 (HR 7232; LTT 7569; Gliese 744) is a yellow-hued star located in the southern constellation Corona Australis. It has an apparent magnitude of 6.16,[2] placing it near the limit for naked eye visibility, even under ideal conditions. The object is located relatively close at a distance of 55.3 light-years based on Gaia DR3 parallax measurements,[1] but it is receding rapidly with a heliocentric radial velocity of 60.9 km/s.[5] At its current distance, HD 177565's brightness is diminished by interstellar extinction of 0.07 magnitudes[15] and it as an absolute magnitude of +5.00.[6] A 2017 multiplicity survey failed to detect any stellar companions around the star.[16]
HD 177565 has a stellar classification of G6 V,[3] indicating that it is an ordinary G-type main-sequence star like our Sun. The object has also be given a later class of G8 V (Houk 1982)[17] and one source lists it as a G5 subgiant.[18] It has 99% the mass of the Sun[7] and 98.5% the Sun's radius.[8] It radiates 85.1% the luminosity of the Sun[1] from its photosphere at an effective temperature of 5,627 K,[10] making it slightly cooler than the Sun. HD 177565 is slightly metal enriched with an iron abundance at [Fe/H] = +0.08 (120% solar)[10] and it is estimated to be 4.58 billion years old.[12] HD 177565 spins slightly faster than the Sun with a projected rotational velocity of 3 km/s[11] compared to the Sun's rotational velocity of 2 km/s.