Kepler-598 c
Kepler-598 c is a sub-Neptune orbiting Kepler-598 in the constellation Cygnus. It lies about 2,221 light-years from Earth and was discovered in 2020 using the transit method.
How Big Is Kepler-598 c?
Kepler-598 c has a radius of 3.02 times that of Earth.
Is Kepler-598 c in the Habitable Zone?
The position of Kepler-598 c relative to the habitable zone of Kepler-598 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-598: 0.575–1.378 AU (conservative: 0.729–1.306 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-598 c — one full orbit around Kepler-598 — lasts 86.5 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-598 c Discovered?
Kepler-598 c was discovered in 2020 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-598 c?
Kepler-598 c is 2,221.4 light-years (681.1 parsecs) from Earth. Light arriving here tonight left the planet about 2,221 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 39,096,640 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-598 c scores 0.43, ranking #385 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-598
Kepler-598
- Surface temperature
- 5,245 K (Sun: 5,772 K)
- Mass
- 0.90 M☉
- Radius
- 0.90 R☉
- Luminosity
- 0.5527 L☉
The Kepler-598 Planetary System
Kepler-598 c is one of 2 known planets in the Kepler-598 system. Its siblings:
- Kepler-598 b (Super Earth)
Kepler-598 c — Complete Data
| Radius | 3.024 Earth radii (0.270 Jupiter radii) |
|---|---|
| Orbital period | 86.49 days |
| Earth Similarity Index | 0.43 |
| Distance from Earth | 2,221.4 light-years (681.1 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2020 |
Data: NASA Exoplanet Archive, last updated 2020-09-08. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-598 c
Is Kepler-598 c habitable?
Kepler-598 c is not known to orbit within the habitable zone of Kepler-598, and as a sub-Neptune it is an unlikely candidate for life as we know it.
How far away is Kepler-598 c?
Kepler-598 c is about 2,221 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 39,096,640 years to get there.
How big is Kepler-598 c compared to Earth?
Kepler-598 c has 3.02 times the radius of Earth.
How long is a year on Kepler-598 c?
One orbit around Kepler-598 takes 86.5 Earth days.
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