K2-371 b
K2-371 b is a hot Jupiter orbiting K2-371 in the constellation Cancer. It lies about 1,444 light-years from Earth and was discovered in 2022 using the transit method.
How Big Is K2-371 b?
K2-371 b has a radius of 13.02 times that of Earth, or 1.16 times the radius of Jupiter.
Is K2-371 b in the Habitable Zone?
The position of K2-371 b relative to the habitable zone of K2-371 cannot be precisely determined from the available orbital data.
Habitable zone of K2-371: 0.420–1.019 AU (conservative: 0.532–0.966 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 K2-371 b — one full orbit around K2-371 — lasts 3.11 Earth days, shorter than Mercury's 88-day year.
How Was K2-371 b Discovered?
K2-371 b was discovered in 2022 using the transit method, with observations from K2.
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 K2-371 b?
K2-371 b is 1,444.3 light-years (442.8 parsecs) from Earth. Light arriving here tonight left the planet about 1,444 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 25,419,680 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. K2-371 b scores 0.07, ranking #4,807 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: K2-371
K2-371
- Surface temperature
- 4,925 K (Sun: 5,772 K)
- Mass
- 0.96 M☉
- Radius
- 0.74 R☉
Planetary System
K2-371 b is the only planet known to orbit K2-371 so far.
K2-371 b — Complete Data
| Radius | 13.024 Earth radii (1.162 Jupiter radii) |
|---|---|
| Orbital period | 3.11 days |
| Earth Similarity Index | 0.07 |
| Distance from Earth | 1,444.3 light-years (442.8 parsecs) |
| Constellation | Cancer |
| Discovery method | Transit |
| Discovery facility | K2 |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2022-03-16. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About K2-371 b
Is K2-371 b habitable?
K2-371 b is not known to orbit within the habitable zone of K2-371, and as a hot Jupiter it is an unlikely candidate for life as we know it.
How far away is K2-371 b?
K2-371 b is about 1,444 light-years from Earth in the constellation Cancer. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 25,419,680 years to get there.
How big is K2-371 b compared to Earth?
K2-371 b has 13.02 times the radius of Earth.
How long is a year on K2-371 b?
One orbit around K2-371 takes 3.1 Earth days — short enough that 117 of its years would fit into one Earth year.
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