HD 82943 (164 G. Hydrae) is a star with a pair of orbiting exoplanets in the equatorial constellation of Hydra. It has an apparent visual magnitude of 6.54, [ 1 ] which is near the lower limit of visibility to the naked eye.

Oct 24, 2024 · HD 82943 b is a gas giant exoplanet that orbits a G-type star. Its mass is 1.681 Jupiters, it takes 441.5 days to complete one orbit of its star, and is 1.18306 AU from its star. Its discovery was announced in 2003.

HD 82943 b is an extrasolar planet approximately 89 light-years away in the constellation of Hydra. The planet was announced in 2000 by the Geneva Extrasolar Planet Search Team. [1] The planet is the outermost planet of two. [2]

Researchers using a high resolution spectrograph at the European Southern Observatory's Kueyen telescope believe they have seen a clear signature of this contamination by identifying the isotope Lithium-6 in this sun-like star's spectrum.

The planetary system HD 82943 consists of two planets in a 2:1 mean motion resonance. Both resonant angles are librating around zero. The orbital parameters are based on 10 years of radial velocity measurements with the Keck telescope.

Oct 18, 2013 · The HD 82943 planetary system contains two planets in 2:1 MMR and its dynamical state is well established. The resonant angles θ 1 and θ 2 of two nearly equal mass planets are librating around 0° with moderate libration amplitudes of …

Nov 26, 2004 · The published orbits of the planets HD 82943b and HD 82943c correspond to a system bound to a catastrophic event in less than 100,000 years. Alternative sets of elements and masses, which fit the available observational data and correspond to regular motions, are presented in this paper.

Planet Orbital Elements Orbital Period (years) Minimum Mass (M E) Discovery; Designation Semimajor Axis (AU) Eccentricity Discoverer Name Announcement Date

Jun 4, 2013 · We present an updated analysis of radial velocity data of the HD 82943 planetary system based on 10 years of measurements obtained with the Keck telescope. Previous studies have shown that the HD 82943 system has two planets that are likely in 2:1 mean-motion resonance (MMR), with the orbital periods about 220 and 440 days (Lee et al. 2006).

Yellow-White star HD 82943 is located 90 light years away from the Sun. It is a single star of spectral class F9VFe+0.5 C, that has 114 % of solar mass. There are multiple known exoplanets in this system.