The LHS 1140 system contains 2 exoplanets. It is located 48.88 light years away from the solar system.
| Mass | 0.19 solar masses |
| Radius | 0.21 solar radiae |
| Temperature | 2988 kelvin |
| Stellar Metallicity | -0.262 decimal exponent |
| Age | 5 billion years |
At more than 10 Earth masses, LHS 1140 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 | 6.380 Earth masses |
| Density | 8.040 grams per cubic centimeter |
| Radius | 1.635 Earth radiae |
| Semi-major Axis | 0.0957 AU |
| Eccentricity | 0.096 |
| Orbital Period | 24.737 days |
| Discovery Method | Transit |
| Discovery Facility | MEarth Project |
| Discovery Telescope | 0.4 m MEarth Telescope |
| Discovery Instrument | Apogee CCD Sensor |
| Discovery Date | 2017-04 |
| Reference | Dittmann et al. 2017 |
At 1.762 Earth masses, LHS 1140 c is a so called Super Earth. Super Earths could be terrestrial worlds like Earth, but they could also be ocean worlds or terrestrial worlds wrapped in a substantial atmosphere, in which case some refer to them as Mini Neptunes.
| Mass | 1.760 Earth masses |
| Density | 6.070 grams per cubic centimeter |
| Radius | 1.169 Earth radiae |
| Semi-major Axis | 0.02734 AU |
| Eccentricity | 0.274 |
| Orbital Period | 3.778 days |
| Discovery Method | Transit |
| Discovery Facility | Multiple Observatories |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2019-01 |
| Reference | Ment et al. 2019 |