CoRoT-7 d
CoRoT-7 d is a Neptune-like planet orbiting CoRoT-7 in the constellation Monoceros. It lies about 522 light-years from Earth and was discovered in 2022 using the radial velocity method.
Is CoRoT-7 d in the Habitable Zone?
The position of CoRoT-7 d relative to the habitable zone of CoRoT-7 cannot be precisely determined from the available orbital data.
Habitable zone of CoRoT-7: 0.534–1.279 AU (conservative: 0.677–1.212 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-7 d — one full orbit around CoRoT-7 — lasts 8.97 Earth days, shorter than Mercury's 88-day year.
How Was CoRoT-7 d Discovered?
CoRoT-7 d was discovered in 2022 using the radial velocity method, with observations from La Silla Observatory.
The radial velocity method measures the subtle wobble of a star caused by the gravitational pull of an orbiting planet, visible as periodic shifts in the star's light spectrum. The size of the wobble reveals the planet's minimum mass.
How Far Away Is CoRoT-7 d?
CoRoT-7 d is 521.5 light-years (159.9 parsecs) from Earth. Light arriving here tonight left the planet around the year 1505. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 9,178,400 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-7 d scores 0.18, ranking #4,027 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: CoRoT-7
CoRoT-7
- Surface temperature
- 5,275 K (Sun: 5,772 K)
- Mass
- 0.82 M☉
- Radius
- 0.83 R☉
The CoRoT-7 Planetary System
CoRoT-7 d is one of 3 known planets in the CoRoT-7 system. Its siblings:
CoRoT-7 d — Complete Data
| Mass | 17.14 Earth masses (0.054 Jupiter masses) |
|---|---|
| Orbital period | 8.97 days |
| Earth Similarity Index | 0.18 |
| Distance from Earth | 521.5 light-years (159.9 parsecs) |
| Constellation | Monoceros |
| Discovery method | Radial Velocity |
| Discovery facility | La Silla Observatory |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2022-08-16. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About CoRoT-7 d
Is CoRoT-7 d habitable?
CoRoT-7 d is not known to orbit within the habitable zone of CoRoT-7, and as a Neptune-like planet it is an unlikely candidate for life as we know it.
How far away is CoRoT-7 d?
CoRoT-7 d is about 522 light-years from Earth in the constellation Monoceros. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 9,178,400 years to get there.
How long is a year on CoRoT-7 d?
One orbit around CoRoT-7 takes 9.0 Earth days — short enough that 41 of its years would fit into one Earth year.
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