Kepler-82 f
Kepler-82 f is a Neptune-like planet orbiting Kepler-82 in the constellation Cygnus. It lies about 2,950 light-years from Earth and was discovered in 2019 using the transit timing variations method.
Is Kepler-82 f in the Habitable Zone?
The position of Kepler-82 f relative to the habitable zone of Kepler-82 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on Kepler-82 f — one full orbit around Kepler-82 — lasts 75.7 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.340 AU — closer to its star than Mercury is to the Sun. Its orbit is nearly circular (eccentricity 0.001).
How Was Kepler-82 f Discovered?
Kepler-82 f was discovered in 2019 using the transit timing variations method, with observations from KOINet.
Transit timing variations reveal a planet through its gravitational tug on a sibling planet, which makes that sibling's transits arrive slightly early or late. The pattern of these deviations betrays the hidden planet's mass and orbit.
How Far Away Is Kepler-82 f?
Kepler-82 f is 2,949.5 light-years (904.3 parsecs) from Earth. Light arriving here tonight left the planet about 2,950 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 51,911,200 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. Kepler-82 f scores 0.33, ranking #903 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-82
Kepler-82
- Mass
- 0.91 M☉
- Radius
- 0.90 R☉
The Kepler-82 Planetary System
Kepler-82 f is one of 5 known planets in the Kepler-82 system. Its siblings:
- Kepler-82 b (Neptune-like)
- Kepler-82 c (Neptune-like)
- Kepler-82 d (Super Earth)
- Kepler-82 e (Mini Neptune)
Kepler-82 f — Complete Data
| Mass | 20.90 Earth masses (0.066 Jupiter masses) |
|---|---|
| Orbital period | 75.73 days |
| Orbital distance | 0.340 AU |
| Eccentricity | 0.001 |
| Earth Similarity Index | 0.33 |
| Distance from Earth | 2,949.5 light-years (904.3 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit Timing Variations |
| Discovery facility | KOINet |
| Discovery year | 2019 |
Data: NASA Exoplanet Archive, last updated 2019-07-19. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-82 f
Is Kepler-82 f habitable?
Kepler-82 f is not known to orbit within the habitable zone of Kepler-82, and as a Neptune-like planet it is an unlikely candidate for life as we know it.
How far away is Kepler-82 f?
Kepler-82 f is about 2,950 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 51,911,200 years to get there.
How long is a year on Kepler-82 f?
One orbit around Kepler-82 takes 75.7 Earth days.
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