Exoplanet

HD 18599 b

Orbiting HD 18599

Overview

HD 18599 b is an exoplanet orbiting the star HD 18599, discovered in 2022 using the Transit method. It is a Mini-Neptune world.

Key Measurements

Radius

2.60

Earth radii

015 R⊕

Mass

24.10

Earth masses

0500 M⊕

Orbital Period

4.1

days

0.1d10,000d

Distance

38.6

parsecs

Nearby10,000 pc

Radius (Earth radii)

2.60

Mass (Earth masses)

24.10

Measured

Equilibrium Temperature

Unknown

Parameter source: Desidera et al. 2023

Orbital Period

4.137+0.000−0.000days

Semi-Major Axis

0.0480+0.0004−0.0004au

Planet Mass (Earth masses)

24.10+7.10−7.70

Planet Mass (Jupiter masses)

0.0758+0.0223−0.0242

Eccentricity

0.3400+0.0700−0.0900

Argument of Periastron

-2.5+16.3−17.8deg

Radial Velocity Semi-Amplitude

11.30+3.30−3.60m/s

Distance from Earth

38.6 pc (~126 ly)

Spectral Type

K2 V

Temperature

5145 K

Mass (Solar)

0.86 M☉

Radius (Solar)

0.77 R☉

Luminosity

-0.43 log L☉

Planets in System

1

Stars in System

2

Coordinates (RA, Dec)

44.2620°, -56.1919°

Discovery Method

Transit

Discovery Year

2022

Data Sources
NASA Exoplanet Archive

Source ID: HD 18599 b

System Context

HD 18599 b orbits HD 18599 and was reported in 2022 and was detected with the Transit method.

Published measurements list a radius of 2.6 Earth radii, a mass of 24.1 Earth masses, and an orbital period of 4.14 days.

Catalog data places the system at about 38.6 parsecs from Earth, a host star classified as K2 V, and 1 known planet in the system.

Host star

Explore the stellar record for this system to compare temperature, spectral type, and known planets.

Open HD 18599