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Kepler-1544 b

Kepler-1544 · K2V host star · orange star · main sequence

[ KEPLER_1544_B.IMG ]
VIEW 1 · ON THE SURFACE
1 / 2
Artist’s impression of Kepler-1544 b: VIEW 1 · ON THE SURFACE
VIEW 1 · ON THE SURFACE · Artist’s impression. No surface has been seen.
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1,092.9 light-years from Earth
[ FACTS.DAT ]
Right ascension / declination297.285° / 49.212°J2000 / ICRS
Gravity1.21 × Earthmodelled estimate
Year168.8 days
From its star0.5447 AUabout 81.5 million km
Stars in the system1 star1 known planet in system
Stars this world orbits1 starOrbits Kepler-1544
Day and nightProbably has a day/night cycleIt likely rotates relative to its star, but its rotation period has not been measured. Heuristic: likely at ≤0.25 AU, uncertain to 0.50 AU, probably not beyond; rotation is not directly measured.
[ TEMP.EST ]MODELLED, NOT MEASURED
Host star≈5,000 Ktypical K2V · 0.80 Sun radii
No atmosphere267 K · -6°C30% reflective · heat shared
Earth-like air300 K · 27°CBaseline plus 33°C

Star temperature and orbital distance set incoming energy, but stellar size is also required. This calculation uses a typical radius for the listed spectral type, 30% reflectivity and even heat redistribution. It is not a ground-temperature forecast: air, clouds, oceans and surface reflectivity could move the result by tens to hundreds of degrees.

[ STARLIGHT.SPC ]VISIBLE LIGHT ONLY

The marker above the bar is a typical temperature for this star’s class. The line below is Earth’s Sun.

orange-gold

Kepler-1544 is class K2V. Its daylight would have a warmer orange-gold cast than sunlight on Earth.

Representative daytime geometry only; the star’s height in the sky changes through the day.

[ GROUND.TXT ]STILL INFERENCE

Most plausible case. A K star near 4900 K and 0.74 solar radii. From 0.55 AU it spans about 0.72°, and the planet receives about 83% of Earth’s light. Radius 1.78 Earth radii, large for bare rock. Orange daylight, temperate flux, a 169-day year so a fixed dayside is unlikely. If the surface is rock, it is ordinary warm ground. More often at this size the “surface” is under a volatile layer.

Dry case. Warm rock and dunes under an orange, Sun-sized star, if the envelope was lost.

Thick-air case. The better bet. Clouds, and no visible ground.

Walking. About 21% heavier than Earth only if it is rocky. No known neighbor. Magnitude 14, about 1,100 light-years away.

Based on: NASA composite; Teff 4886 K, R 0.74 Rsun, S 0.83, Rp 1.78, a 0.545 AU

[ ORBIT.SYS ]1 KNOWN · ALL SHOWN
100% · Above 30°

Kepler-1544 b circles Kepler-1544. Use Higher and Lower to move your viewpoint above, through and below the orbital plane, and − / + to zoom. Orbit shapes and spacing are schematic.

[ SOURCES.TXT ]

Positions, distances, and system parameters come from the NASA Exoplanet Archive composite table, queried 25 Sep 2026. GJ 273 b uses the parallax in that row, 12.4 light-years. The 45 worlds follow Bohl, Lawrence, Lowry, and Kaltenegger.