EPIC 248847494 b
EPIC 248847494 b is a cold gas giant orbiting EPIC 248847494 in the constellation Leo. It lies about 1,800 light-years from Earth and was discovered in 2018 using the transit method.
How Big Is EPIC 248847494 b?
EPIC 248847494 b has a radius of 12.44 times that of Earth, or 1.11 times the radius of Jupiter. Its mass is 4,132 times that of Earth.
Is EPIC 248847494 b in the Habitable Zone?
EPIC 248847494 b orbits beyond the outer edge of the habitable zone of EPIC 248847494. At that distance, any surface water would almost certainly be frozen.
Habitable zone of EPIC 248847494: 1.527–3.707 AU (conservative: 1.934–3.515 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on EPIC 248847494 b
The equilibrium temperature of EPIC 248847494 b is about 183 K (-90 °C) — well below freezing. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C. It receives 0.19 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on EPIC 248847494 b — one full orbit around EPIC 248847494 — lasts 3,650.0 Earth days, longer than an Earth year. It orbits at an average distance of 4.500 AU.
How Was EPIC 248847494 b Discovered?
EPIC 248847494 b was discovered in 2018 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 248847494 b?
EPIC 248847494 b is 1,800.0 light-years (551.9 parsecs) from Earth. Light arriving here tonight left the planet about 1,800 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 31,680,000 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 248847494 b scores 0.22, ranking #3,658 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: EPIC 248847494
EPIC 248847494
- Surface temperature
- 4,898 K (Sun: 5,772 K)
- Mass
- 0.90 M☉
- Radius
- 2.70 R☉
Planetary System
EPIC 248847494 b is the only planet known to orbit EPIC 248847494 so far.
EPIC 248847494 b — Complete Data
| Radius | 12.442 Earth radii (1.110 Jupiter radii) |
|---|---|
| Mass | 4,131.79 Earth masses (13.000 Jupiter masses) |
| Orbital period | 3,650.00 days |
| Orbital distance | 4.500 AU |
| Equilibrium temperature | 183 K (-90 °C) |
| Stellar irradiation | 0.19× Earth |
| Earth Similarity Index | 0.22 |
| Distance from Earth | 1,800.0 light-years (551.9 parsecs) |
| Constellation | Leo |
| Discovery method | Transit |
| Discovery facility | K2 |
| Discovery year | 2018 |
Data: NASA Exoplanet Archive, last updated 2019-07-19. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About EPIC 248847494 b
Is EPIC 248847494 b habitable?
No — EPIC 248847494 b orbits outside the habitable zone of EPIC 248847494 and is likely too cold for liquid water on its surface.
How far away is EPIC 248847494 b?
EPIC 248847494 b is about 1,800 light-years from Earth in the constellation Leo. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 31,680,000 years to get there.
How big is EPIC 248847494 b compared to Earth?
EPIC 248847494 b has 12.44 times the radius of Earth and about 4,132 times its mass.
How long is a year on EPIC 248847494 b?
One orbit around EPIC 248847494 takes 3,650.0 Earth days.
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