KIC 8121913 b
KIC 8121913 b is a hot Jupiter orbiting KIC 8121913 in the constellation Cygnus. It lies about 2,307 light-years from Earth and was discovered in 2021 using the orbital brightness modulation method.
Is KIC 8121913 b in the Habitable Zone?
The position of KIC 8121913 b relative to the habitable zone of KIC 8121913 cannot be precisely determined from the available orbital data.
Habitable zone of KIC 8121913: 1.771–4.152 AU (conservative: 2.243–3.936 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 KIC 8121913 b — one full orbit around KIC 8121913 — lasts 3.29 Earth days, shorter than Mercury's 88-day year.
How Was KIC 8121913 b Discovered?
KIC 8121913 b was discovered in 2021 using the orbital brightness modulation method, with observations from Kepler.
Orbital brightness modulation detects a planet from minute periodic changes in the combined light of the system as the planet orbits — including light reflected by the planet and relativistic effects it induces on the star.
How Far Away Is KIC 8121913 b?
KIC 8121913 b is 2,306.9 light-years (707.3 parsecs) from Earth. Light arriving here tonight left the planet about 2,307 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 40,601,440 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. KIC 8121913 b scores 0.07, ranking #4,989 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: KIC 8121913
KIC 8121913
- Surface temperature
- 5,975 K (Sun: 5,772 K)
- Mass
- 1.46 M☉
- Radius
- 2.23 R☉
Planetary System
KIC 8121913 b is the only planet known to orbit KIC 8121913 so far.
KIC 8121913 b — Complete Data
| Mass (best estimate) | 667.44 Earth masses |
|---|---|
| Orbital period | 3.29 days |
| Earth Similarity Index | 0.07 |
| Distance from Earth | 2,306.9 light-years (707.3 parsecs) |
| Constellation | Cygnus |
| Discovery method | Orbital Brightness Modulation |
| Discovery facility | Kepler |
| Discovery year | 2021 |
Data: NASA Exoplanet Archive, last updated 2021-08-10. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About KIC 8121913 b
Is KIC 8121913 b habitable?
KIC 8121913 b is not known to orbit within the habitable zone of KIC 8121913, and as a hot Jupiter it is an unlikely candidate for life as we know it.
How far away is KIC 8121913 b?
KIC 8121913 b is about 2,307 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 40,601,440 years to get there.
How long is a year on KIC 8121913 b?
One orbit around KIC 8121913 takes 3.3 Earth days — short enough that 111 of its years would fit into one Earth year.
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