The HD 1397 system contains 1 exoplanet. It is located 259.52 light years away from the solar system.
| Mass | 1.32 solar masses |
| Radius | 2.34 solar radiae |
| Temperature | 5521 kelvin |
| Stellar Metallicity | 0.29 decimal exponent |
| Age | 4.51 billion years |
At more than 50 Earth masses, HD 1397 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 131.899 Earth masses |
| Density | 0.477 grams per cubic centimeter |
| Radius | 11.500 Earth radiae |
| Semi-major Axis | 0.1097 AU |
| Eccentricity | 0.251 |
| Orbital Period | 11.535 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 | 2019-03 |
| Reference | Nielsen et al. 2019 |