The HD 39091 system is known to contain 2 exoplanets in orbit around it. It is located 59.59 light years away from the solar system.
| Mass | 1.09 solar masses |
| Radius | 1.1 solar radiae |
| Temperature | 6037 kelvin |
| Stellar Metallicity | 0.08 Decimal exponent |
| Age | 2.98 billion years |
At more than 50 Earth masses, HD 39091 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 4099.986 Earth masses |
| Density | 12.100 grams per cubic centimeter |
| Radius | 12.300 Earth radiae |
| Semi-major Axis | 3.1 AU |
| Eccentricity | 0.637 |
| Orbital Period | 2093.070 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Anglo-Australian Telescope |
| Discovery Telescope | 3.9 m Anglo-Australian Telescope |
| Discovery Instrument | UCLES Spectrograph |
| Discovery Date | 2002-07 |
| Reference | Jones et al. 2002 |
With a mass below 5 Earth masses, a density of 2.97, and a semi-major axis of 0.06839 astronomical units, HD 39091 c could, potentially, be an ocean world - a planet with no dry land.
| Mass | 4.820 Earth masses |
| Density | 2.970 grams per cubic centimeter |
| Radius | 2.042 Earth radiae |
| Semi-major Axis | 0.06839 AU |
| Eccentricity | 0 |
| Orbital Period | 6.268 days |
| Discovery Method | Transit |
| Discovery Facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery Telescope | 0.1 m TESS Telescope |
| Discovery Instrument | TESS CCD Array |
| Discovery Date | 2018-11 |
| Reference | Gandolfi et al. 2018 |