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HD 21520
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HD 21520 b
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Exoplanet HD 21520 b

Exoplanet HD 21520 b orbits star HD 21520 that lies 259 light years away from the Sun. It weighs about 7.9 Earth masses and orbits its star closer than Earth orbits Sun.
Sun distance
259 light years

HD 21520 b

Exoplanet, sub-neptune
Star: HD 21520
icon distanceDistance from the star: 0.1726 AU
icon timeOrbit around star: 25.1292 days

Basic characteristic

icon weightMass: 7.9 M Earth
icon radiusSize: 2.697 R Earth | 0.2 R Jupiter
icon densityDensity: 2220 kg/m3 | 40 % Earth
icon temperatureTemperature: 637 K | 364 °C
icon discoveryYear of discovery: 2024 (transit)
Comparison to the Solar system planets
icon massMass: Neptune (46 % Neptune mass)
icon radiusSize: Neptune (70 % Neptune radius)
icon massDensity: Neptune (136 % Neptune density)
icon distanceDistance: Mercury (44 % Mercury distance)
Other designations of this exoplanet
TIC 404518509 b, TOI 4320 b
Exoplanets around star HD 21520
Exoplanet HD 21520 b orbits star Class yellow star HD 21520, which has bigger mass than Sun. It is the only known exoplanet orbiting this star
HD 21520 b
| 0.17 AU
Star HD 21520
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