Host star — Kepler-1544
- Spectral type
- —
- Temperature
- 4,886 K
- Radius
- 0.74 R☉
- Mass
- 0.81 M☉
- Luminosity
- 0.248 L☉
- Distance
- 335.1 pc (1,093 ly)
Cooler than the Sun. Orange or red dwarf.
Kepler-1544 b
Orbits Kepler-1544 · 1,093 light-years from Earth
Super-EarthTransit2016ESI 84 · Very Earth-like
Radius
1.78×
Earth
Mass
3.8×
Earth
Year
169d
Temp
269 K
-4°C
Gravity
1.2×
Earth
Distance
1,093
ly
Could life exist here?
AI analysisKepler-1544 b is a super-Earth roughly 1.78 times Earth's radius with a mass of 3.82 Earth masses, yielding a density of 3.72 g/cm³—suggesting a rocky composition with a modest iron core. Orbiting a cool M-dwarf star every 169 days at 0.545 AU, this world receives an equilibrium temperature of 269 Kelvin (−4°C), placing it firmly in the "snowball" regime where liquid water could exist only if the planet retained substantial atmospheric insulation. The circular orbit and proximity to its low-mass host star reduce tidal heating concerns, though we lack direct measurements of atmospheric composition or magnetic field strength—both critical unknowns for habitability. The high ESI score of 84 reflects its favorable size, density, and thermal conditions relative to Earth, but the frigid surface temperature demands either a thick, greenhouse-rich atmosphere or subsurface liquid reservoirs to support life as we understand it. Kepler-1544 b's 1,090-light-year distance makes detailed follow-up challenging, yet its discovery via transit photometry and cool-star proximity make it an intriguing benchmark for testing whether small, distant worlds in the habitable zone can retain the atmospheric conditions necessary for biological activity.
What it would be like
Kepler-1544 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 -4°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.
An orbital period of 169 days makes the year 2.2× 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.
Radius1.78R⊕
1/25×Earth = 125×
Mass3.82M⊕
1/10000×Earth = 110000×
Surface gravity1.21g
1/100×Earth = 1100×
Equilibrium temp269 K(-4°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
- 2016
- Facility
- Kepler
- Semi-major axis
- 0.5446 AU
- Period
- 168.81 days
- Eccentricity
- 0.0000
- Density
- 3.72 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-1544Kepler-1544 bOrbitEarth orbitHabitable zone
Drag to rotate · scroll to zoomSemi-major axis: 0.545 AUEccentricity: 0.0000Period: 168.8 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 1,093 light-years?
- A light beam leaving Earth right now would arrive in 1,093 years.
- At Voyager 1's speed (17 km/s), the trip would take approximately 19.3 million years.
- A radio signal sent today would arrive in 1092.9 years — and the reply wouldn't come back for twice that.
Earth Similarity Index
84/1000 — 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.