CoRoT-1 b
CoRoT-1 b is a hot Jupiter orbiting the G0 V star CoRoT-1 in the constellation Monoceros. It lies about 2,570 light-years from Earth and was discovered in 2008 using the transit method.
How Big Is CoRoT-1 b?
CoRoT-1 b has a radius of 16.70 times that of Earth, or 1.49 times the radius of Jupiter. Its mass is 327 times that of Earth, giving it a density of 0.38 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is CoRoT-1 b in the Habitable Zone?
The position of CoRoT-1 b relative to the habitable zone of CoRoT-1 cannot be precisely determined from the available orbital data.
Habitable zone of CoRoT-1: 0.874–2.051 AU (conservative: 1.107–1.944 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on CoRoT-1 b
The equilibrium temperature of CoRoT-1 b is about 1,898 K (1,625 °C) — hot enough to melt many metals. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C.
Orbit and Year Length
A year on CoRoT-1 b — one full orbit around CoRoT-1 — lasts just 36.2 hours, shorter than Mercury's 88-day year.
How Was CoRoT-1 b Discovered?
CoRoT-1 b was discovered in 2008 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-1 b?
CoRoT-1 b is 2,569.8 light-years (787.9 parsecs) from Earth. Light arriving here tonight left the planet about 2,570 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 45,228,480 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-1 b scores 0.06, ranking #5,229 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: CoRoT-1
CoRoT-1
- Spectral type
- G0 V
- Surface temperature
- 5,950 K (Sun: 5,772 K)
- Mass
- 0.95 M☉
- Radius
- 1.11 R☉
Planetary System
CoRoT-1 b is the only planet known to orbit CoRoT-1 so far.
CoRoT-1 b — Complete Data
| Radius | 16.700 Earth radii (1.490 Jupiter radii) |
|---|---|
| Mass | 327.35 Earth masses (1.030 Jupiter masses) |
| Density | 0.38 g/cm³ (Earth: 5.51) |
| Orbital period | 1.51 days |
| Equilibrium temperature | 1,898 K (1,625 °C) |
| Earth Similarity Index | 0.06 |
| Distance from Earth | 2,569.8 light-years (787.9 parsecs) |
| Constellation | Monoceros |
| Discovery method | Transit |
| Discovery facility | CoRoT |
| Discovery year | 2008 |
Data: NASA Exoplanet Archive, last updated 2014-05-14. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About CoRoT-1 b
Is CoRoT-1 b habitable?
CoRoT-1 b is not known to orbit within the habitable zone of CoRoT-1, and as a hot Jupiter it is an unlikely candidate for life as we know it.
How far away is CoRoT-1 b?
CoRoT-1 b is about 2,570 light-years from Earth in the constellation Monoceros. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 45,228,480 years to get there.
How big is CoRoT-1 b compared to Earth?
CoRoT-1 b has 16.70 times the radius of Earth and about 327 times its mass.
How long is a year on CoRoT-1 b?
One orbit around CoRoT-1 takes 1.5 Earth days — short enough that 242 of its years would fit into one Earth year.
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