HD 18438 b is a gas giant exoplanet that orbits an M-type star. Its mass is 21 Jupiters, it takes 2.2 years to complete one orbit of its star, and is 2.1 AU from its star. Its discovery was announced in 2023.

PLANET TYPE
Gas Giant
DISCOVERY DATE
2023
MASS
21 Jupiters
PLANET RADIUS
1.08 x Jupiter
(estimate)
ORBITAL RADIUS
2.1 AU
ORBITAL PERIOD
2.2 years
ECCENTRICITY
0.1
DETECTION METHOD