Kepler-417 c
Kepler-417 c is a exoplanet orbiting Kepler-417 in the constellation Cygnus. It lies about 3,177 light-years from Earth and was discovered in 2014 using the transit timing variations method.
Is Kepler-417 c in the Habitable Zone?
The position of Kepler-417 c relative to the habitable zone of Kepler-417 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on Kepler-417 c — one full orbit around Kepler-417 — lasts 15.9 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-417 c Discovered?
Kepler-417 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-417 c?
Kepler-417 c is 3,176.7 light-years (974.0 parsecs) from Earth. Light arriving here tonight left the planet about 3,177 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 55,909,920 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-417 c scores 0.27, ranking #2,685 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-417
Kepler-417
- Mass
- 0.90 M☉
- Radius
- 0.81 R☉
The Kepler-417 Planetary System
Kepler-417 c is one of 2 known planets in the Kepler-417 system. Its siblings:
- Kepler-417 b (Super Earth)
Kepler-417 c — Complete Data
| Orbital period | 15.94 days |
|---|---|
| Earth Similarity Index | 0.27 |
| Distance from Earth | 3,176.7 light-years (974.0 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit Timing Variations |
| Discovery facility | Kepler |
| Discovery year | 2014 |
Data: NASA Exoplanet Archive, last updated 2014-05-28. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-417 c
Is Kepler-417 c habitable?
Kepler-417 c is not known to orbit within the habitable zone of Kepler-417.
How far away is Kepler-417 c?
Kepler-417 c is about 3,177 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 55,909,920 years to get there.
How long is a year on Kepler-417 c?
One orbit around Kepler-417 takes 15.9 Earth days — short enough that 23 of its years would fit into one Earth year.
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