The Kepler-54 system contains 3 exoplanets. It is located 886.17 light years away from the solar system.
| Mass | 0.51 solar masses |
| Radius | 0.5 solar radiae |
| Temperature | 3705 kelvin |
| Stellar Metallicity | -0.27 decimal exponent |
| Age | 13.8 billion years |
At more than 10 Earth masses, Kepler-54 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 | 21.500 Earth masses |
| Density | 12.800 grams per cubic centimeter |
| Radius | 2.100 Earth radiae |
| Semi-major Axis | 0.0619 AU |
| Eccentricity | 0 |
| Orbital Period | 8.011 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2013-01 |
| Reference | Steffen et al. 2013 |
At more than 10 Earth masses, Kepler-54 c 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 | 19.800 Earth masses |
| Density | 58.500 grams per cubic centimeter |
| Radius | 1.230 Earth radiae |
| Semi-major Axis | 0.0809 AU |
| Eccentricity | 0 |
| Orbital Period | 12.072 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2013-01 |
| Reference | Steffen et al. 2013 |
At 2.957 Earth masses, Kepler-54 d 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 | 2.960 Earth masses |
| Density | 4.540 grams per cubic centimeter |
| Radius | 1.530 Earth radiae |
| Semi-major Axis | 0.126 AU |
| Eccentricity | 0 |
| Orbital Period | 20.996 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2014-03 |
| Reference | Rowe et al. 2014 |