Kepler-407 b
Kepler-407 b is a terrestrial planet orbiting Kepler-407 in the constellation Draco. It lies about 1,104 light-years from Earth and was discovered in 2014 using the transit method.
How Big Is Kepler-407 b?
Kepler-407 b has a radius of 1.19 times that of Earth. Its mass is 1.9 times that of Earth.
Is Kepler-407 b in the Habitable Zone?
The position of Kepler-407 b relative to the habitable zone of Kepler-407 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-407: 0.693–1.647 AU (conservative: 0.878–1.562 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-407 b — one full orbit around Kepler-407 — lasts just 16.1 hours, shorter than Mercury's 88-day year.
How Was Kepler-407 b Discovered?
Kepler-407 b was discovered in 2014 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-407 b?
Kepler-407 b is 1,103.6 light-years (338.4 parsecs) from Earth. Light arriving here tonight left the planet about 1,104 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 19,423,360 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-407 b scores 0.29, ranking #1,680 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-407
Kepler-407
- Surface temperature
- 5,476 K (Sun: 5,772 K)
- Mass
- 1.00 M☉
- Radius
- 1.01 R☉
- Age
- 7.5 billion years (Sun: 4.6)
The Kepler-407 Planetary System
Kepler-407 b is one of 2 known planets in the Kepler-407 system. Its siblings:
Kepler-407 b — Complete Data
| Radius | 1.190 Earth radii (0.106 Jupiter radii) |
|---|---|
| Mass | 1.93 Earth masses (0.006 Jupiter masses) |
| Orbital period | 0.67 days |
| Earth Similarity Index | 0.29 |
| Distance from Earth | 1,103.6 light-years (338.4 parsecs) |
| Constellation | Draco |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2014 |
Data: NASA Exoplanet Archive, last updated 2025-08-07. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-407 b
Is Kepler-407 b habitable?
Kepler-407 b is not known to orbit within the habitable zone of Kepler-407, and as a terrestrial planet it is an unlikely candidate for life as we know it.
How far away is Kepler-407 b?
Kepler-407 b is about 1,104 light-years from Earth in the constellation Draco. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 19,423,360 years to get there.
How big is Kepler-407 b compared to Earth?
Kepler-407 b has 1.19 times the radius of Earth and about 1.9 times its mass.
How long is a year on Kepler-407 b?
One orbit around Kepler-407 takes 0.7 Earth days — short enough that 546 of its years would fit into one Earth year.
Explore Kepler-407 b in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
