Host star — Kepler-452
- Spectral type
- G2
- Temperature
- 5,757 K
- Radius
- 1.11 R☉
- Mass
- 1.04 M☉
- Luminosity
- 1.215 L☉
- Distance
- 551.7 pc (1,799 ly)
Yellow star — the same class as our Sun.
Similar to our Sun (5,778 K).
Kepler-452 b
Orbits Kepler-452 · 1,799 light-years from Earth
Super-EarthTransit2015ESI 88 · Very Earth-like
Radius
1.63×
Earth
Mass
3.3×
Earth
Year
385d
Temp
265 K
-8°C
Gravity
1.2×
Earth
Distance
1,799
ly
What it would be like
Kepler-452 b is a super-Earth — larger than our planet but likely still rocky or ice-rich. Whether it has a thin atmosphere like Mars or a crushing one like Venus remains unknown.
Surface gravity is about 1.2g — noticeably heavier what you're used to on Earth.
With an equilibrium temperature around -8°C, this planet sits in the temperature range where liquid water could potentially exist on the surface — a key ingredient for life as we know it.
One orbit takes 384.84 days — a year here is 1.1× longer than Earth's.
Earth comparison
Logarithmic bars so Jupiter-class planets fit the same scale as Earth-size worlds.
Radius1.63R⊕
1/25×Earth = 125×
Mass3.29M⊕
1/10000×Earth = 110000×
Surface gravity1.24g
1/100×Earth = 1100×
Equilibrium temp265 K(-8°C)
0 KEarth 255 K2500 K
Side-by-side with Earth
Temperature in context
Liquid N₂Mars avgEarth eq.Earth sfc.Boiling H₂OVenus
Discovery & orbit
- Method
- Transit
- Year
- 2015
- Facility
- Kepler
- Semi-major axis
- 1.0460 AU
- Period
- 384.84 days
- Eccentricity
- 0.0000
- Density
- 4.17 g/cm³
Detected by measuring the tiny dip in starlight as the planet crosses in front of its star.
Nearly circular orbit.
Rocky composition likely. Earth is 5.51 g/cm³.
Discovered via · Transit
Tiny dip in starlight as the planet crosses in front of its star
A transit photometer watches a star nonstop and measures its brightness to ~0.01%. When a planet passes between us and the star, the star dims briefly — the deeper the dip, the bigger the planet. This is how Kepler and TESS found most known exoplanets.
- Overall share
- ~75% of all confirmed worlds
- Best for
- Earth-to-Neptune-sized planets on short orbits
Orbital Animation
Kepler-452Kepler-452 bOrbitEarth orbitHabitable zone
Drag to rotate · scroll to zoomSemi-major axis: 1.046 AUEccentricity: 0.0000Period: 1.05 years
Hertzsprung–Russell Diagram
Where this host star sits among … exoplanet host stars. The main sequence band runs diagonally — giants and supergiants sit above, white dwarfs below.
OBAFGKMCurrent star
How far is 1,799 light-years?
- A light beam leaving Earth right now would arrive in 1,799 years.
- At Voyager 1's speed (17 km/s), the trip would take approximately 31.7 million years.
- A radio signal sent today would arrive in 1799.5 years — and the reply wouldn't come back for twice that.
Earth Similarity Index
88/1000 — Nothing like Earth100 — Identical to Earth
ESI combines radius similarity and equilibrium temperature similarity. Earth = 100. Mars ≈ 73. Venus ≈ 44. This score reflects two physical parameters only — not atmosphere, water, or magnetic field.