Kepler-19 c
Kepler-19 c is a Neptune-like planet orbiting Kepler-19 in the constellation Lyra. It lies about 713 light-years from Earth and was discovered in 2011 using the transit timing variations method.
Is Kepler-19 c in the Habitable Zone?
The position of Kepler-19 c relative to the habitable zone of Kepler-19 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-19: 0.602–1.427 AU (conservative: 0.762–1.353 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-19 c — one full orbit around Kepler-19 — lasts 28.7 Earth days, shorter than Mercury's 88-day year. Its orbit is mildly elliptical (eccentricity 0.21).
How Was Kepler-19 c Discovered?
Kepler-19 c was discovered in 2011 using the transit timing variations method, with observations from Kepler.
Transit timing variations reveal a planet through its gravitational tug on a sibling planet, which makes that sibling's transits arrive slightly early or late. The pattern of these deviations betrays the hidden planet's mass and orbit.
How Far Away Is Kepler-19 c?
Kepler-19 c is 712.9 light-years (218.6 parsecs) from Earth. Light arriving here tonight left the planet around the year 1314. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 12,547,040 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-19 c scores 0.24, ranking #3,342 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-19
Kepler-19
- Surface temperature
- 5,544 K (Sun: 5,772 K)
- Mass
- 0.94 M☉
- Radius
- 0.86 R☉
- Age
- 1.9 billion years (Sun: 4.6)
The Kepler-19 Planetary System
Kepler-19 c is one of 3 known planets in the Kepler-19 system. Its siblings:
- Kepler-19 b (Super Earth)
- Kepler-19 d (Neptune-like)
Kepler-19 c — Complete Data
| Mass | 13.10 Earth masses (0.041 Jupiter masses) |
|---|---|
| Orbital period | 28.73 days |
| Eccentricity | 0.210 |
| Earth Similarity Index | 0.24 |
| Distance from Earth | 712.9 light-years (218.6 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit Timing Variations |
| Discovery facility | Kepler |
| Discovery year | 2011 |
Data: NASA Exoplanet Archive, last updated 2017-04-11. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-19 c
Is Kepler-19 c habitable?
Kepler-19 c is not known to orbit within the habitable zone of Kepler-19, and as a Neptune-like planet it is an unlikely candidate for life as we know it.
How far away is Kepler-19 c?
Kepler-19 c is about 713 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 12,547,040 years to get there.
How long is a year on Kepler-19 c?
One orbit around Kepler-19 takes 28.7 Earth days — short enough that 13 of its years would fit into one Earth year.
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