HD 47186 b is a short-period “hot Neptune” extrasolar planet orbiting the nearby G-type star HD 47186 in the constellation Canis Major, at a distance of approximately from Earth. With a minimum mass of about 22.8 M⊕, it belongs to the population of low-mass, close-in planets identified by high-precision radial velocity surveys of bright stars. The planet orbits at a distance of roughly and completes one revolution in 4.0845 days. Its orbit is nearly circular, with an eccentricity of about 0.04.
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