Kepler-328 b
Kepler-328 b is a super-Earth orbiting Kepler-328 in the constellation Cygnus. It lies about 7,219 light-years from Earth and was discovered in 2013 using the transit method.
How Big Is Kepler-328 b?
Kepler-328 b has a radius of 2.30 times that of Earth. Its mass is 28.5 times that of Earth.
Is Kepler-328 b in the Habitable Zone?
The position of Kepler-328 b relative to the habitable zone of Kepler-328 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on Kepler-328 b — one full orbit around Kepler-328 — lasts 34.9 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-328 b Discovered?
Kepler-328 b was discovered in 2013 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-328 b?
Kepler-328 b is 7,218.5 light-years (2,213.2 parsecs) from Earth. Light arriving here tonight left the planet about 7,219 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 127,045,600 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-328 b scores 0.26, ranking #2,797 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-328
Kepler-328
- Mass
- 1.15 M☉
- Radius
- 1.06 R☉
The Kepler-328 Planetary System
Kepler-328 b is one of 2 known planets in the Kepler-328 system. Its siblings:
- Kepler-328 c (Neptune-like)
Kepler-328 b — Complete Data
| Radius | 2.300 Earth radii (0.205 Jupiter radii) |
|---|---|
| Mass | 28.50 Earth masses (0.090 Jupiter masses) |
| Orbital period | 34.92 days |
| Earth Similarity Index | 0.26 |
| Distance from Earth | 7,218.5 light-years (2,213.2 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2013 |
Data: NASA Exoplanet Archive, last updated 2014-05-14. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-328 b
Is Kepler-328 b habitable?
Kepler-328 b is not known to orbit within the habitable zone of Kepler-328, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is Kepler-328 b?
Kepler-328 b is about 7,219 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 127,045,600 years to get there.
How big is Kepler-328 b compared to Earth?
Kepler-328 b has 2.30 times the radius of Earth and about 28.5 times its mass.
How long is a year on Kepler-328 b?
One orbit around Kepler-328 takes 34.9 Earth days — short enough that 10 of its years would fit into one Earth year.
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