Kepler-522 b
Kepler-522 b is a cold gas giant orbiting Kepler-522 in the constellation Lyra. It lies about 2,085 light-years from Earth and was discovered in 2016 using the transit method.
How Big Is Kepler-522 b?
Kepler-522 b has a radius of 6.91 times that of Earth, or 0.62 times the radius of Jupiter.
Is Kepler-522 b in the Habitable Zone?
The position of Kepler-522 b relative to the habitable zone of Kepler-522 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-522: 1.752–4.074 AU (conservative: 2.219–3.862 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-522 b — one full orbit around Kepler-522 — lasts 38.6 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-522 b Discovered?
Kepler-522 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-522 b?
Kepler-522 b is 2,084.9 light-years (639.2 parsecs) from Earth. Light arriving here tonight left the planet about 2,085 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 36,694,240 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-522 b scores 0.13, ranking #4,271 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-522
Kepler-522
- Surface temperature
- 6,392 K (Sun: 5,772 K)
- Mass
- 1.54 M☉
- Radius
- 1.98 R☉
- Age
- 1.7 billion years (Sun: 4.6)
Planetary System
Kepler-522 b is the only planet known to orbit Kepler-522 so far.
Kepler-522 b — Complete Data
| Radius | 6.910 Earth radii (0.616 Jupiter radii) |
|---|---|
| Orbital period | 38.58 days |
| Earth Similarity Index | 0.13 |
| Distance from Earth | 2,084.9 light-years (639.2 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-522 b
Is Kepler-522 b habitable?
Kepler-522 b is not known to orbit within the habitable zone of Kepler-522, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is Kepler-522 b?
Kepler-522 b is about 2,085 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 36,694,240 years to get there.
How big is Kepler-522 b compared to Earth?
Kepler-522 b has 6.91 times the radius of Earth.
How long is a year on Kepler-522 b?
One orbit around Kepler-522 takes 38.6 Earth days.
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