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GJ 3998 d
Orbiting GJ 3998, discovered in 2025 (7530) by Multiple Observatories via the Radial Velocity method.
Planet
| Radius | Unknown |
| Mass | 6.07 M⊕ |
| Orbital period | 41.78 Earth days (~0.1 Earth years) |
| Orbital eccentricity | 0.000 |
| Equilibrium temperature | Unknown |
Host star — GJ 3998
| Temperature | 3726 K (3453 °C) |
| Radius | 0.50 R☉ |
| Mass | 0.52 M☉ |
Location
| Distance from Earth | 18.1 pc (~59 light-years) |
| Right ascension / Declination | 259.0021 / 11.0562 |
Last refreshed 2026-09-13 from NASA's Exoplanet Archive.