HD 152843 (also designated as TOI-2319) is a single star with a pair of close-orbiting exoplanets,[3] located in the northern constellation of Hercules. It is positioned at a distance of 356 light years from the Sun based on parallax measurements,[2] and at that range is too faint to be viewed with the naked eye, having an apparent visual magnitude of 8.85.[3] The system is receding further away with a radial velocity of 10 km/s.[2]
This star has two confirmed exoplanets orbiting it, being designated HD 152843 b and HD 152843 c. Both were discovered using NASA’s Transiting Exoplanet Survey Satellite (TESS) when they were observed transiting their host star.[3]
HD 152843 b is the closest planet to HD 152843, orbiting its host star in just 11.62 days. The planet has 9.8 Earth masses and 3.1 Earth radii. The planet orbits the star at a distance of 0.105 astronomical units (au), has an orbital eccentricity of 0.05, and has an orbital inclination of 89.3°.[6][5]
HD 152843 c is the second planet in the star system and farthest planet from its star. It has 9.7 Earth masses and 5.9 Earth radii. It orbits its host star at a speed of 7.1 kilometers a second, with its orbital eccentricity being 0.07 and an orbital inclination of 89.2°.[7] Its low density makes it a super-puff planet.[5]
^ abcdNicholson, B. A.; Aigrain, S.; et al. (October 2023). "HD152843 b & c: the masses and orbital periods of a sub-Neptune and a super-puff Neptune". arXiv:2310.15068 [astro-ph.EP].
