EPIC 201757695.02
EPIC 201757695.02 is a terrestrial planet orbiting EPIC 201757695 in the constellation Leo. It was discovered in 2020 using the transit method.
How Big Is EPIC 201757695.02?
EPIC 201757695.02 has a radius of 0.91 times that of Earth.
Is EPIC 201757695.02 in the Habitable Zone?
EPIC 201757695.02 orbits inside the inner edge of the habitable zone of EPIC 201757695. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of EPIC 201757695: 0.526–1.298 AU (conservative: 0.666–1.231 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Orbit and Year Length
A year on EPIC 201757695.02 — one full orbit around EPIC 201757695 — lasts 2.05 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.030 AU — closer to its star than Mercury is to the Sun.
How Was EPIC 201757695.02 Discovered?
EPIC 201757695.02 was discovered in 2020 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.
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 201757695.02 scores 0.29, ranking #1,565 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: EPIC 201757695
EPIC 201757695
- Surface temperature
- 4,520 K (Sun: 5,772 K)
- Mass
- 0.73 M☉
- Radius
- 0.66 R☉
- Luminosity
- 0.4330 L☉
Planetary System
EPIC 201757695.02 is the only planet known to orbit EPIC 201757695 so far.
EPIC 201757695.02 — Complete Data
| Radius | 0.908 Earth radii (0.081 Jupiter radii) |
|---|---|
| Orbital period | 2.05 days |
| Orbital distance | 0.030 AU |
| Earth Similarity Index | 0.29 |
| Constellation | Leo |
| Discovery method | Transit |
| Discovery facility | K2 |
| Discovery year | 2020 |
Data: NASA Exoplanet Archive, last updated 2020-11-13. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About EPIC 201757695.02
Is EPIC 201757695.02 habitable?
No — EPIC 201757695.02 orbits too close to its star and is too hot for liquid water to exist on its surface.
How big is EPIC 201757695.02 compared to Earth?
EPIC 201757695.02 has 0.91 times the radius of Earth.
How long is a year on EPIC 201757695.02?
One orbit around EPIC 201757695 takes 2.0 Earth days — short enough that 178 of its years would fit into one Earth year.
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