Kepler-92 d
Kepler-92 d is a mini-Neptune orbiting Kepler-92 in the constellation Lyra. It lies about 1,559 light-years from Earth and was discovered in 2015 using the transit method.
How Big Is Kepler-92 d?
Kepler-92 d has a radius of 2.07 times that of Earth.
Is Kepler-92 d in the Habitable Zone?
The position of Kepler-92 d relative to the habitable zone of Kepler-92 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on Kepler-92 d — one full orbit around Kepler-92 — lasts 49.4 Earth days, shorter than Mercury's 88-day year. Its orbit is mildly elliptical (eccentricity 0.07).
How Was Kepler-92 d Discovered?
Kepler-92 d was discovered in 2015 using the transit method, with observations from Kepler.
The transit method watches a star for the tiny, regular dip in brightness that occurs when a planet crosses in front of it. The depth and timing of these dips reveal the planet's size and orbital period.
How Far Away Is Kepler-92 d?
Kepler-92 d is 1,559.0 light-years (478.0 parsecs) from Earth. Light arriving here tonight left the planet about 1,559 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 27,438,400 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-92 d scores 0.28, ranking #2,222 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-92
Kepler-92
- Mass
- 1.21 M☉
- Radius
- 1.70 R☉
The Kepler-92 Planetary System
Kepler-92 d is one of 3 known planets in the Kepler-92 system. Its siblings:
- Kepler-92 b (Super Earth)
- Kepler-92 c (Mini Neptune)
Kepler-92 d — Complete Data
| Radius | 2.067 Earth radii (0.184 Jupiter radii) |
|---|---|
| Orbital period | 49.36 days |
| Eccentricity | 0.070 |
| Earth Similarity Index | 0.28 |
| Distance from Earth | 1,559.0 light-years (478.0 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2015 |
Data: NASA Exoplanet Archive, last updated 2015-05-21. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-92 d
Is Kepler-92 d habitable?
Kepler-92 d is not known to orbit within the habitable zone of Kepler-92, and as a mini-Neptune it is an unlikely candidate for life as we know it.
How far away is Kepler-92 d?
Kepler-92 d is about 1,559 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 27,438,400 years to get there.
How big is Kepler-92 d compared to Earth?
Kepler-92 d has 2.07 times the radius of Earth.
How long is a year on Kepler-92 d?
One orbit around Kepler-92 takes 49.4 Earth days.
Explore Kepler-92 d in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
