Kepler-528 b
Kepler-528 b is a mini-Neptune orbiting Kepler-528 in the constellation Cygnus. It lies about 2,558 light-years from Earth and was discovered in 2016 using the transit method.
How Big Is Kepler-528 b?
Kepler-528 b has a radius of 2.08 times that of Earth.
Is Kepler-528 b in the Habitable Zone?
The position of Kepler-528 b relative to the habitable zone of Kepler-528 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-528: 0.802–1.888 AU (conservative: 1.016–1.790 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-528 b — one full orbit around Kepler-528 — lasts 19.8 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-528 b Discovered?
Kepler-528 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-528 b?
Kepler-528 b is 2,557.8 light-years (784.2 parsecs) from Earth. Light arriving here tonight left the planet about 2,558 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 45,017,280 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-528 b scores 0.27, ranking #2,643 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-528
Kepler-528
- Surface temperature
- 5,807 K (Sun: 5,772 K)
- Mass
- 1.01 M☉
- Radius
- 1.06 R☉
- Age
- 5.5 billion years (Sun: 4.6)
Planetary System
Kepler-528 b is the only planet known to orbit Kepler-528 so far.
Kepler-528 b — Complete Data
| Radius | 2.080 Earth radii (0.186 Jupiter radii) |
|---|---|
| Orbital period | 19.78 days |
| Earth Similarity Index | 0.27 |
| Distance from Earth | 2,557.8 light-years (784.2 parsecs) |
| Constellation | Cygnus |
| 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-528 b
Is Kepler-528 b habitable?
Kepler-528 b is not known to orbit within the habitable zone of Kepler-528, and as a mini-Neptune it is an unlikely candidate for life as we know it.
How far away is Kepler-528 b?
Kepler-528 b is about 2,558 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 45,017,280 years to get there.
How big is Kepler-528 b compared to Earth?
Kepler-528 b has 2.08 times the radius of Earth.
How long is a year on Kepler-528 b?
One orbit around Kepler-528 takes 19.8 Earth days — short enough that 18 of its years would fit into one Earth year.
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