KOI-142 c
KOI-142 c is a cold gas giant orbiting KOI-142 in the constellation Lyra. It lies about 1,229 light-years from Earth and was discovered in 2013 using the transit timing variations method.
Is KOI-142 c in the Habitable Zone?
The position of KOI-142 c relative to the habitable zone of KOI-142 cannot be precisely determined from the available orbital data.
Habitable zone of KOI-142: 0.614–1.459 AU (conservative: 0.777–1.383 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 KOI-142 c — one full orbit around KOI-142 — lasts 22.3 Earth days, shorter than Mercury's 88-day year. Its orbit is mildly elliptical (eccentricity 0.06).
How Was KOI-142 c Discovered?
KOI-142 c was discovered in 2013 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 KOI-142 c?
KOI-142 c is 1,229.2 light-years (376.9 parsecs) from Earth. Light arriving here tonight left the planet about 1,229 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 21,633,920 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. KOI-142 c scores 0.10, ranking #4,406 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: KOI-142
KOI-142
- Surface temperature
- 5,466 K (Sun: 5,772 K)
- Mass
- 0.99 M☉
- Radius
- 0.90 R☉
The KOI-142 Planetary System
KOI-142 c is one of 3 known planets in the KOI-142 system. Its siblings:
- KOI-142 b (Puffy Planet)
- Kepler-88 d (Cold Gas Giant)
KOI-142 c — Complete Data
| Mass | 214.10 Earth masses (0.674 Jupiter masses) |
|---|---|
| Orbital period | 22.26 days |
| Eccentricity | 0.057 |
| Earth Similarity Index | 0.10 |
| Distance from Earth | 1,229.2 light-years (376.9 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit Timing Variations |
| Discovery facility | Kepler |
| Discovery year | 2013 |
Data: NASA Exoplanet Archive, last updated 2020-05-28. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About KOI-142 c
Is KOI-142 c habitable?
KOI-142 c is not known to orbit within the habitable zone of KOI-142, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is KOI-142 c?
KOI-142 c is about 1,229 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 21,633,920 years to get there.
How long is a year on KOI-142 c?
One orbit around KOI-142 takes 22.3 Earth days — short enough that 16 of its years would fit into one Earth year.
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