Kepler-1982 b
Kepler-1982 b is a terrestrial planet orbiting Kepler-1982 in the constellation Lyra. It lies about 1,823 light-years from Earth and was discovered in 2023 using the transit method.
How Big Is Kepler-1982 b?
Kepler-1982 b has a radius of 0.77 times that of Earth.
Is Kepler-1982 b in the Habitable Zone?
Kepler-1982 b orbits inside the inner edge of the habitable zone of Kepler-1982. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of Kepler-1982: 0.945–2.206 AU (conservative: 1.197–2.091 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on Kepler-1982 b
The equilibrium temperature of Kepler-1982 b is about 1,282 K (1,009 °C) — hot enough to melt many metals. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C. It receives 638 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on Kepler-1982 b — one full orbit around Kepler-1982 — lasts 3.82 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.051 AU — closer to its star than Mercury is to the Sun.
How Was Kepler-1982 b Discovered?
Kepler-1982 b was discovered in 2023 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-1982 b?
Kepler-1982 b is 1,822.7 light-years (558.9 parsecs) from Earth. Light arriving here tonight left the planet about 1,823 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 32,079,520 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-1982 b scores 0.29, ranking #1,922 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-1982
Kepler-1982
- Surface temperature
- 6,202 K (Sun: 5,772 K)
- Mass
- 1.21 M☉
- Radius
- 1.12 R☉
Planetary System
Kepler-1982 b is the only planet known to orbit Kepler-1982 so far.
Kepler-1982 b — Complete Data
| Radius | 0.770 Earth radii (0.069 Jupiter radii) |
|---|---|
| Orbital period | 3.82 days |
| Orbital distance | 0.051 AU |
| Equilibrium temperature | 1,282 K (1,009 °C) |
| Stellar irradiation | 638.38× Earth |
| Earth Similarity Index | 0.29 |
| Distance from Earth | 1,822.7 light-years (558.9 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2023 |
Data: NASA Exoplanet Archive, last updated 2017-05-08. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-1982 b
Is Kepler-1982 b habitable?
No — Kepler-1982 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is Kepler-1982 b?
Kepler-1982 b is about 1,823 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 32,079,520 years to get there.
How big is Kepler-1982 b compared to Earth?
Kepler-1982 b has 0.77 times the radius of Earth.
How long is a year on Kepler-1982 b?
One orbit around Kepler-1982 takes 3.8 Earth days — short enough that 96 of its years would fit into one Earth year.
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