Kepler-419 c
Kepler-419 c is a cold gas giant orbiting Kepler-419 in the constellation Cygnus. It lies about 3,299 light-years from Earth and was discovered in 2014 using the transit timing variations method. It orbits within the habitable zone of its star — the region where liquid water could exist on a planet's surface.
Is Kepler-419 c in the Habitable Zone?
Kepler-419 c orbits within the optimistic habitable zone of Kepler-419 — the broader region where liquid water might be possible under favorable atmospheric conditions.
Habitable zone of Kepler-419: 1.555–3.612 AU (conservative: 1.969–3.425 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-419 c — one full orbit around Kepler-419 — lasts 675.5 Earth days, longer than an Earth year. It orbits at an average distance of 1.680 AU. Its orbit is mildly elliptical (eccentricity 0.18).
How Was Kepler-419 c Discovered?
Kepler-419 c was discovered in 2014 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-419 c?
Kepler-419 c is 3,298.6 light-years (1,011.4 parsecs) from Earth. Light arriving here tonight left the planet about 3,299 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 58,055,360 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-419 c scores 0.36, ranking #697 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-419
Kepler-419
- Surface temperature
- 6,430 K (Sun: 5,772 K)
- Mass
- 1.39 M☉
- Radius
- 1.74 R☉
The Kepler-419 Planetary System
Kepler-419 c is one of 2 known planets in the Kepler-419 system. Its siblings:
- Kepler-419 b (Cold Gas Giant)
Kepler-419 c — Complete Data
| Mass | 2,320.10 Earth masses (7.300 Jupiter masses) |
|---|---|
| Orbital period | 675.47 days |
| Orbital distance | 1.680 AU |
| Eccentricity | 0.184 |
| Earth Similarity Index | 0.36 |
| Distance from Earth | 3,298.6 light-years (1,011.4 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit Timing Variations |
| Discovery facility | Kepler |
| Discovery year | 2014 |
Data: NASA Exoplanet Archive, last updated 2014-06-25. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-419 c
Is Kepler-419 c habitable?
Kepler-419 c orbits within the habitable zone of Kepler-419, the region where liquid water could exist on a planet's surface. Whether it is actually habitable depends on its atmosphere and composition, which remain unknown.
How far away is Kepler-419 c?
Kepler-419 c is about 3,299 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 58,055,360 years to get there.
How long is a year on Kepler-419 c?
One orbit around Kepler-419 takes 675.5 Earth days.
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