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TOI-269 b is a Neptune-like exoplanet (an ice giant with a thick atmosphere), about 2.8 times the radius of Earth. It has an equilibrium temperature of 531 K (258°C). The planet completes one orbit around its star every 3.7 Earth days. It was discovered in 2021 using the transit method. It orbits the M-type star TOI-269, located approximately 57 parsecs (186 light-years) from Earth.
2021
Discovered
8.8
Earth Masses
2.77
Earth Radii
531
Temperature (K)
Discovery Information
Discovery MethodTransit
Discovery Year2,021
Discovery FacilityTransiting Exoplanet Survey Satellite (TESS)
Orbital Properties
Orbital Period3.6977 days
Semi-Major Axis0.0345 AU
Eccentricity0.425
Inclination88.14 deg
Physical Properties
Mass (Jupiter)0.0277 MJ
Mass (Earth)8.8 M⊕
Radius (Jupiter)0.2471 RJ
Radius (Earth)2.77 R⊕
Density2.28 g/cm3
Eq. Temperature531 K
Insolation Flux19 S⊕
Planetary Extremes
Where TOI-269 b sits on the spectrum of all known exoplanets.
Mass8.8 M⊕
FeatherweightColossus
Radius2.77 R⊕
TinyEnormous
Temperature531 K
FrozenInferno
Year Length3.7 days
LightningGlacial
Density2.28 g/cm³
FluffyIron-dense
Star Distance0.035 AU
ScorchedFrozen exile
Star System View
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Size Comparison
2.77x Earth's radius (0.25x Jupiter)
Orbit Comparison
Earth: 365.25 days (1 AU)TOI-269 b: 3.7 Earth days (0.035 AU)
Host Star: TOI-269
Spectral TypeM2 V
Effective Temperature3,514 K
Mass0.3917 M☉
Radius0.398 R☉
Size vs Sun2.51x smaller
Metallicity [Fe/H]-0.29
Distance (pc)57.0225 pc
Distance (ly)186.0 light-years
Planets in the TOI-269 System
What If You Lived Here?
80.3 kg
Your weight (from 70 kg)
1.15g
Earth-like
Feels just like home — comfortably familiar.
3.7 Earth days
Year length
Red sunrise
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