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HD 23472 b is a Super-Earth exoplanet (a planet larger than Earth but smaller than Neptune), about 2.0 times the radius of Earth. It has an equilibrium temperature of 543 K (270°C). The planet completes one orbit around its star every 17.7 Earth days. It was discovered in 2019 using the transit method. It orbits the K-type star HD 23472, located approximately 39 parsecs (127 light-years) from Earth.
2019
Discovered
8.3
Earth Masses
2.00
Earth Radii
543
Temperature (K)
Discovery Information
Discovery MethodTransit
Discovery Year2,019
Discovery FacilityTransiting Exoplanet Survey Satellite (TESS)
Orbital Properties
Orbital Period17.6671 days
Semi-Major Axis0.1162 AU
Eccentricity0.072
Inclination88.93 deg
Physical Properties
Mass (Jupiter)0.0262 MJ
Mass (Earth)8.32 M⊕
Radius (Jupiter)0.1784 RJ
Radius (Earth)2 R⊕
Density6.15 g/cm3
Eq. Temperature543 K
Insolation Flux16 S⊕
Planetary Extremes
Where HD 23472 b sits on the spectrum of all known exoplanets.
Mass8.3 M⊕
FeatherweightColossus
Radius2.00 R⊕
TinyEnormous
Temperature543 K
FrozenInferno
Year Length17.7 days
LightningGlacial
Density6.15 g/cm³
FluffyIron-dense
Star Distance0.116 AU
ScorchedFrozen exile
Star System View
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Size Comparison
2.00x Earth's radius (0.18x Jupiter)
Orbit Comparison
Earth: 365.25 days (1 AU)HD 23472 b: 17.7 Earth days (0.116 AU)
Host Star: HD 23472
Spectral TypeK4 V
Effective Temperature4,684 K
Mass0.67 M☉
Radius0.71 R☉
Size vs Sun1.41x smaller
Luminosity0.237 L☉
Luminosity vs Sun4.2x dimmer
Metallicity [Fe/H]-0.2
Distance (pc)39.0341 pc
Distance (ly)127.3 light-years
What If You Lived Here?
145.6 kg
Your weight (from 70 kg)
2.08g
Crushing
Standing upright is a struggle. Your body feels like lead.
17.7 Earth days
Year length
Orange sunrise
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