The Kepler-33 system contains 5 exoplanets. It is located 3943.75 light years away from the solar system.
| Mass | 1.29 solar masses |
| Radius | 1.82 solar radiae |
| Temperature | 5904 kelvin |
| Stellar Metallicity | 0.025 decimal exponent |
| Age | 4.27 billion years |
At 3.689 Earth masses, Kepler-33 b 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 | 3.680 Earth masses |
| Density | 3.840 grams per cubic centimeter |
| Radius | 1.740 Earth radiae |
| Semi-major Axis | 0.0677 AU |
| Eccentricity | 0 |
| Orbital Period | 5.668 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2012-05 |
| Reference | Lissauer et al. 2012 |
With a mass below 5 Earth masses, a density of 0.13, and a semi-major axis of 0.1189 astronomical units, Kepler-33 c could, potentially, be an ocean world - a planet with no dry land.
| Mass | 0.390 Earth masses |
| Density | 0.130 grams per cubic centimeter |
| Radius | 3.200 Earth radiae |
| Semi-major Axis | 0.1189 AU |
| Eccentricity | 0 |
| Orbital Period | 13.176 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2012-05 |
| Reference | Lissauer et al. 2012 |
With a mass below 5 Earth masses, a density of 0.25, and a semi-major axis of 0.1662 astronomical units, Kepler-33 d could, potentially, be an ocean world - a planet with no dry land.
| Mass | 3.910 Earth masses |
| Density | 0.250 grams per cubic centimeter |
| Radius | 5.350 Earth radiae |
| Semi-major Axis | 0.1662 AU |
| Eccentricity | 0 |
| Orbital Period | 21.776 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2012-05 |
| Reference | Lissauer et al. 2012 |
At more than 10 Earth masses, Kepler-33 e 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 | 5.570 Earth masses |
| Density | 0.800 grams per cubic centimeter |
| Radius | 4.020 Earth radiae |
| Semi-major Axis | 0.2138 AU |
| Eccentricity | 0 |
| Orbital Period | 31.784 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2012-05 |
| Reference | Lissauer et al. 2012 |
At more than 10 Earth masses, Kepler-33 f 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 | 9.600 Earth masses |
| Density | 0.900 grams per cubic centimeter |
| Radius | 4.460 Earth radiae |
| Semi-major Axis | 0.2535 AU |
| Eccentricity | 0 |
| Orbital Period | 41.029 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2012-05 |
| Reference | Lissauer et al. 2012 |