TOI-2257 b
JovianA super-Neptune swinging between temperate and frozen conditions over its 35-day orbit. At perihelion it receives enough heat for a marginal atmosphere; at aphelion it drops to deep-frozen temperatures. A world of violent seasonal extremes.
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Physical Properties
Radius
69110.0 km
Mass
99.8 M⊕
Surface Gravity
1.05 g
Temperature
148 K (-126°C)
Atmosphere
None — H2/He (no surface)
Day Length
15.8 hours
Orbital Period
1.8 years
Orbital Distance
1.49 AU