Kepler-310 d
Kepler-310 d is a mini-Neptune orbiting Kepler-310 in the constellation Cygnus. It lies about 1,964 light-years from Earth and was discovered in 2014 using the transit method.
How Big Is Kepler-310 d?
Kepler-310 d has a radius of 2.47 times that of Earth.
Is Kepler-310 d in the Habitable Zone?
Kepler-310 d orbits inside the inner edge of the habitable zone of Kepler-310. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of Kepler-310: 0.661–1.556 AU (conservative: 0.837–1.476 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 ›
Orbit and Year Length
A year on Kepler-310 d — one full orbit around Kepler-310 — lasts 92.9 Earth days, between the years of Mercury (88 days) and Earth (365 days). It orbits at an average distance of 0.392 AU — comparable to the inner Solar System.
How Was Kepler-310 d Discovered?
Kepler-310 d was discovered in 2014 using the transit method, with observations from Kepler.
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 Kepler-310 d?
Kepler-310 d is 1,964.3 light-years (602.3 parsecs) from Earth. Light arriving here tonight left the planet about 1,964 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 34,571,680 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-310 d scores 0.49, ranking #257 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-310
Kepler-310
- Surface temperature
- 5,797 K (Sun: 5,772 K)
- Radius
- 0.88 R☉
The Kepler-310 Planetary System
Kepler-310 d is one of 3 known planets in the Kepler-310 system. Its siblings:
- Kepler-310 b (Terrestrial)
- Kepler-310 c (Sub Neptune)
Kepler-310 d — Complete Data
| Radius | 2.470 Earth radii (0.220 Jupiter radii) |
|---|---|
| Orbital period | 92.88 days |
| Orbital distance | 0.392 AU |
| Earth Similarity Index | 0.49 |
| Distance from Earth | 1,964.3 light-years (602.3 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2014 |
Data: NASA Exoplanet Archive, last updated 2014-05-14. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-310 d
Is Kepler-310 d habitable?
No — Kepler-310 d orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is Kepler-310 d?
Kepler-310 d is about 1,964 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 34,571,680 years to get there.
How big is Kepler-310 d compared to Earth?
Kepler-310 d has 2.47 times the radius of Earth.
How long is a year on Kepler-310 d?
One orbit around Kepler-310 takes 92.9 Earth days.
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