Kepler-778 b
Kepler-778 b is a super-Earth orbiting Kepler-778 in the constellation Lyra. It lies about 3,060 light-years from Earth and was discovered in 2016 using the transit method.
How Big Is Kepler-778 b?
Kepler-778 b has a radius of 1.68 times that of Earth.
Is Kepler-778 b in the Habitable Zone?
The position of Kepler-778 b relative to the habitable zone of Kepler-778 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-778: 0.468–1.127 AU (conservative: 0.593–1.068 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-778 b — one full orbit around Kepler-778 — lasts 3.76 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-778 b Discovered?
Kepler-778 b was discovered in 2016 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-778 b?
Kepler-778 b is 3,059.9 light-years (938.2 parsecs) from Earth. Light arriving here tonight left the planet about 3,060 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 53,854,240 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-778 b scores 0.28, ranking #2,332 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-778
Kepler-778
- Surface temperature
- 5,102 K (Sun: 5,772 K)
- Mass
- 0.81 M☉
- Radius
- 0.77 R☉
- Age
- 5.3 billion years (Sun: 4.6)
Planetary System
Kepler-778 b is the only planet known to orbit Kepler-778 so far.
Kepler-778 b — Complete Data
| Radius | 1.680 Earth radii (0.150 Jupiter radii) |
|---|---|
| Orbital period | 3.76 days |
| Earth Similarity Index | 0.28 |
| Distance from Earth | 3,059.9 light-years (938.2 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2016 |
Data: NASA Exoplanet Archive, last updated 2016-05-06. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-778 b
Is Kepler-778 b habitable?
Kepler-778 b is not known to orbit within the habitable zone of Kepler-778, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is Kepler-778 b?
Kepler-778 b is about 3,060 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 53,854,240 years to get there.
How big is Kepler-778 b compared to Earth?
Kepler-778 b has 1.68 times the radius of Earth.
How long is a year on Kepler-778 b?
One orbit around Kepler-778 takes 3.8 Earth days — short enough that 97 of its years would fit into one Earth year.
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