CoRoT-30 b
CoRoT-30 b is a hot Jupiter orbiting the G3 V star CoRoT-30 in the constellation Ophiuchus. It lies about 3,367 light-years from Earth and was discovered in 2020 using the transit method.
How Big Is CoRoT-30 b?
CoRoT-30 b has a radius of 11.31 times that of Earth, or 1.01 times the radius of Jupiter. Its mass is 922 times that of Earth, giving it a density of 3.45 g/cm³ — between that of rocky and gaseous planets.
Is CoRoT-30 b in the Habitable Zone?
CoRoT-30 b orbits inside the inner edge of the habitable zone of CoRoT-30. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of CoRoT-30: 0.658–1.556 AU (conservative: 0.833–1.475 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Orbit and Year Length
A year on CoRoT-30 b — one full orbit around CoRoT-30 — lasts 9.06 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.084 AU — closer to its star than Mercury is to the Sun. Its orbit is nearly circular (eccentricity 0.007).
How Was CoRoT-30 b Discovered?
CoRoT-30 b was discovered in 2020 using the transit method, with observations from CoRoT.
The transit method watches a star for the tiny, regular dip in brightness that occurs when a planet crosses in front of it. The depth and timing of these dips reveal the planet's size and orbital period.
How Far Away Is CoRoT-30 b?
CoRoT-30 b is 3,366.7 light-years (1,032.2 parsecs) from Earth. Light arriving here tonight left the planet about 3,367 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 59,253,920 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. CoRoT-30 b scores 0.09, ranking #4,520 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: CoRoT-30
CoRoT-30
- Spectral type
- G3 V
- Surface temperature
- 5,650 K (Sun: 5,772 K)
- Mass
- 0.98 M☉
- Radius
- 0.91 R☉
- Age
- 3.0 billion years (Sun: 4.6)
Planetary System
CoRoT-30 b is the only planet known to orbit CoRoT-30 so far.
CoRoT-30 b — Complete Data
| Radius | 11.310 Earth radii (1.009 Jupiter radii) |
|---|---|
| Mass | 921.71 Earth masses (2.900 Jupiter masses) |
| Density | 3.45 g/cm³ (Earth: 5.51) |
| Orbital period | 9.06 days |
| Orbital distance | 0.084 AU |
| Eccentricity | 0.007 |
| Earth Similarity Index | 0.09 |
| Distance from Earth | 3,366.7 light-years (1,032.2 parsecs) |
| Constellation | Ophiuchus |
| Discovery method | Transit |
| Discovery facility | CoRoT |
| Discovery year | 2020 |
Data: NASA Exoplanet Archive, last updated 2020-04-10. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About CoRoT-30 b
Is CoRoT-30 b habitable?
No — CoRoT-30 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is CoRoT-30 b?
CoRoT-30 b is about 3,367 light-years from Earth in the constellation Ophiuchus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 59,253,920 years to get there.
How big is CoRoT-30 b compared to Earth?
CoRoT-30 b has 11.31 times the radius of Earth and about 922 times its mass.
How long is a year on CoRoT-30 b?
One orbit around CoRoT-30 takes 9.1 Earth days — short enough that 40 of its years would fit into one Earth year.
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