The HD 199509 system contains 1 exoplanet. It is located 79.27 light years away from the solar system.
| Mass | 1.04 solar masses |
| Radius | 0.92 solar radiae |
| Temperature | 5796.02 kelvin |
| Stellar Metallicity | -0.308 decimal exponent |
| Age | 1.6 billion years |
At more than 10 Earth masses, HD 199509 b is an ice giant, a planet that is made up mostly of volatiles like water, amonia and methane, and enveloped by a dense hydrogen and helium atmosphere, much like Uranus and Neptune.
| Mass | 42.866 Earth masses |
| Density | 0.584 grams per cubic centimeter |
| Radius | 7.390 Earth radiae |
| Semi-major Axis | 0.425988 AU |
| Eccentricity | 0.373206 |
| Orbital Period | 99.622 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Multiple Observatories |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2022-09 |
| Reference | Feng et al. 2022 |