EPIC 205950854 c
EPIC 205950854 c is a super-Earth orbiting K2-168 in the constellation Aquarius. It lies about 796 light-years from Earth and was discovered in 2019 using the transit method.
How Big Is EPIC 205950854 c?
EPIC 205950854 c has a radius of 1.31 times that of Earth.
Is EPIC 205950854 c in the Habitable Zone?
The position of EPIC 205950854 c relative to the habitable zone of K2-168 cannot be precisely determined from the available orbital data.
Habitable zone of K2-168: 0.574–1.364 AU (conservative: 0.727–1.293 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 205950854 c
The equilibrium temperature of EPIC 205950854 c is about 961 K (687 °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 205950854 c — one full orbit around K2-168 — lasts 8.05 Earth days, shorter than Mercury's 88-day year.
How Was EPIC 205950854 c Discovered?
EPIC 205950854 c was discovered in 2019 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 205950854 c?
EPIC 205950854 c is 795.6 light-years (243.9 parsecs) from Earth. Light arriving here tonight left the planet around the year 1231. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 14,002,560 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 205950854 c scores 0.30, ranking #1,424 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: K2-168
K2-168
- Surface temperature
- 5,503 K (Sun: 5,772 K)
- Mass
- 0.88 M☉
- Radius
- 0.83 R☉
The K2-168 Planetary System
EPIC 205950854 c is one of 2 known planets in the K2-168 system. Its siblings:
- K2-168 b (Super Earth)
EPIC 205950854 c — Complete Data
| Radius | 1.310 Earth radii (0.117 Jupiter radii) |
|---|---|
| Orbital period | 8.05 days |
| Equilibrium temperature | 961 K (687 °C) |
| Earth Similarity Index | 0.30 |
| Distance from Earth | 795.6 light-years (243.9 parsecs) |
| Constellation | Aquarius |
| Discovery method | Transit |
| Discovery facility | K2 |
| Discovery year | 2019 |
Data: NASA Exoplanet Archive, last updated 2019-08-09. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About EPIC 205950854 c
Is EPIC 205950854 c habitable?
EPIC 205950854 c is not known to orbit within the habitable zone of K2-168, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is EPIC 205950854 c?
EPIC 205950854 c is about 796 light-years from Earth in the constellation Aquarius. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 14,002,560 years to get there.
How big is EPIC 205950854 c compared to Earth?
EPIC 205950854 c has 1.31 times the radius of Earth.
How long is a year on EPIC 205950854 c?
One orbit around K2-168 takes 8.1 Earth days — short enough that 45 of its years would fit into one Earth year.
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