Host star — Kepler-1649
- Spectral type
- —
- Temperature
- 3,240 K
- Radius
- 0.23 R☉
- Mass
- 0.20 M☉
- Luminosity
- 0.005 L☉
- Distance
- 92.2 pc (301 ly)
Very cool — a faint red dwarf.
Kepler-1649 c
Orbits Kepler-1649 · 301 light-years from Earth
RockyTransit2020ESI 88 · Very Earth-like
Radius
1.06×
Earth
Mass
1.2×
Earth
Year
20d
Temp
234 K
-39°C
Gravity
1.1×
Earth
Distance
301
ly
What it would be like
Kepler-1649 c is a rocky world, potentially similar in composition to Earth or Mars — a solid surface you could, in theory, stand on.
Surface gravity is about 1.1g — noticeably heavier what you're used to on Earth.
At -39°C, this world is cold — similar to Earth's polar regions or the surface of Mars. Water would likely be frozen, but subsurface liquid isn't ruled out.
An orbital period of 20 days makes the year 18.7× shorter than Earth's. You'd celebrate your birthday more often here.
Earth comparison
Logarithmic bars so Jupiter-class planets fit the same scale as Earth-size worlds.
Radius1.06R⊕
1/25×Earth = 125×
Mass1.20M⊕
1/10000×Earth = 110000×
Surface gravity1.07g
1/100×Earth = 1100×
Equilibrium temp234 K(-39°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
- 2020
- Facility
- Kepler
- Semi-major axis
- 0.0649 AU
- Period
- 19.54 days
- Eccentricity
- 0.0000
- Density
- 5.54 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-1649Kepler-1649 cOrbitHabitable zone
Drag to rotate · scroll to zoomSemi-major axis: 0.065 AUEccentricity: 0.0000Period: 19.5 days
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 301 light-years?
- A light beam leaving Earth right now would arrive in 301 years.
- At Voyager 1's speed (17 km/s), the trip would take approximately 5.3 million years.
- A radio signal sent today would arrive in 300.7 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.