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Wolf 1069 b

Wolf 1069 · M5.0 V host star · cool red dwarf · main sequence

[ WOLF_1069_B.IMG ]
VIEW 1 · ON THE SURFACE
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Artist’s impression of Wolf 1069 b: VIEW 1 · ON THE SURFACE
VIEW 1 · ON THE SURFACE · Artist’s impression. No surface has been seen.
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31.3 light-years from Earth
[ FACTS.DAT ]
Right ascension / declination306.524° / 58.575°J2000 / ICRS
Gravity1.08 × Earthmodelled estimate
Year15.6 days
From its star0.0672 AUabout 10.1 million km
Stars in the system1 star1 known planet in system
Stars this world orbits1 starOrbits Wolf 1069
Day and nightLikely synchronous spinProbably spins once per orbit, keeping one hemisphere in permanent day and the other in permanent night. 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≈3,100 Ktypical M5.0 V · 0.18 Sun radii
No atmosphere224 K · -49°C30% reflective · heat shared
Earth-like air257 K · -16°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. A likely synchronous spin also means the permanent day and night sides would not share one ground temperature.

[ 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.

red-orange

Wolf 1069 is class M5.0 V. Its visible daylight would be dim and strongly red-orange; most of its energy is infrared.

Representative lit-side geometry only. On a locked world, the star’s real elevation would depend on where you stand.

[ GROUND.TXT ]STILL INFERENCE

Most plausible case. A single known planet around a 0.18-solar-radius star, 31 light-years away. It receives about 65% of Earth’s light, close to Proxima b’s energy, and the star spans about 1.4°. Dark rock, frost at the terminator, a possible small eyeball of slush. No sibling planet is known to share the sky.

Dry case. A dim red desert, dunes and dust, night-side cold trap for any ice.

Thick-air case. Clouds could hide the ground. The flux is temperate rather than inner-edge hot, so a steam sky is not required.

Walking. About 8% heavier than Earth, modelled from a minimum mass near 1.3 Earth masses. The sky has the red star and no known neighboring planet. The star is magnitude 14 from Earth.

Based on: Kossakowski et al. 2023; Teff 3158 K, R 0.18 Rsun, S 0.65, a 0.067 AU

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

Wolf 1069 b circles Wolf 1069. 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.