EPIC 212297394 c
EPIC 212297394 c is a mini-Neptune orbiting EPIC 212297394 in the constellation Virgo. It lies about 1,365 light-years from Earth and was discovered in 2021 using the transit method.
How Big Is EPIC 212297394 c?
EPIC 212297394 c has a radius of 2.27 times that of Earth.
Is EPIC 212297394 c in the Habitable Zone?
The position of EPIC 212297394 c relative to the habitable zone of EPIC 212297394 cannot be precisely determined from the available orbital data.
Habitable zone of EPIC 212297394: 0.498–1.195 AU (conservative: 0.630–1.133 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 ›
Temperature on EPIC 212297394 c
The equilibrium temperature of EPIC 212297394 c is about 866 K (593 °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 EPIC 212297394 c — one full orbit around EPIC 212297394 — lasts 5.21 Earth days, shorter than Mercury's 88-day year.
How Was EPIC 212297394 c Discovered?
EPIC 212297394 c was discovered in 2021 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 EPIC 212297394 c?
EPIC 212297394 c is 1,364.6 light-years (418.4 parsecs) from Earth. Light arriving here tonight left the planet about 1,365 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 24,016,960 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. EPIC 212297394 c scores 0.25, ranking #3,030 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: EPIC 212297394
EPIC 212297394
- Surface temperature
- 5,171 K (Sun: 5,772 K)
- Mass
- 0.83 M☉
- Radius
- 0.80 R☉
The EPIC 212297394 Planetary System
EPIC 212297394 c is one of 2 known planets in the EPIC 212297394 system. Its siblings:
- EPIC 212297394 b (Super Earth)
EPIC 212297394 c — Complete Data
| Radius | 2.270 Earth radii (0.203 Jupiter radii) |
|---|---|
| Orbital period | 5.21 days |
| Equilibrium temperature | 866 K (593 °C) |
| Earth Similarity Index | 0.25 |
| Distance from Earth | 1,364.6 light-years (418.4 parsecs) |
| Constellation | Virgo |
| Discovery method | Transit |
| Discovery facility | K2 |
| Discovery year | 2021 |
Data: NASA Exoplanet Archive, last updated 2021-08-23. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About EPIC 212297394 c
Is EPIC 212297394 c habitable?
EPIC 212297394 c is not known to orbit within the habitable zone of EPIC 212297394, and as a mini-Neptune it is an unlikely candidate for life as we know it.
How far away is EPIC 212297394 c?
EPIC 212297394 c is about 1,365 light-years from Earth in the constellation Virgo. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 24,016,960 years to get there.
How big is EPIC 212297394 c compared to Earth?
EPIC 212297394 c has 2.27 times the radius of Earth.
How long is a year on EPIC 212297394 c?
One orbit around EPIC 212297394 takes 5.2 Earth days — short enough that 70 of its years would fit into one Earth year.
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