Exoplanet

HD 77946 b

Orbiting HD 77946

Overview

HD 77946 b is an exoplanet orbiting the star HD 77946, discovered in 2024 using the Transit method. It is a Mini-Neptune world.

Key Measurements

Radius

2.90

Earth radii

015 R⊕

Mass

10.90

Earth masses

0500 M⊕

Orbital Period

6.5

days

0.1d10,000d

Distance

99.5

parsecs

Nearby10,000 pc

Equilibrium Temp

1129

K

150 K3,500 K

Radius (Earth radii)

2.90

Mass (Earth masses)

10.90

Measured

Equilibrium Temperature

1129 K

Parameter source: Polanski et al. 2024

Orbital Period

6.527+0.000−0.000days

Semi-Major Axis

0.0730+0.0010−0.0100au

Planet Mass (Earth masses)

10.90+1.80−1.70

Planet Mass (Jupiter masses)

0.0343+0.0057−0.0053

Eccentricity

0.2110+0.0720−0.0720

Argument of Periastron

9.2+32.0−32.0deg

Radial Velocity Semi-Amplitude

3.40+0.53−0.53m/s

Distance from Earth

99.5 pc (~324 ly)

Spectral Type

Unknown

Temperature

6007 K

Mass (Solar)

1.20 M☉

Radius (Solar)

1.32 R☉

Luminosity

0.31 log L☉

Planets in System

1

Stars in System

1

Coordinates (RA, Dec)

136.7776°, 46.6724°

Discovery Method

Transit

Discovery Year

2024

Data Sources
NASA Exoplanet Archive

Source ID: HD 77946 b

System Context

HD 77946 b orbits HD 77946 and was reported in 2024 and was detected with the Transit method.

Published measurements list a radius of 2.9 Earth radii, a mass of 10.9 Earth masses, an orbital period of 6.53 days, and an equilibrium temperature near 1,129 K.

Catalog data places the system at about 99.5 parsecs from Earth 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 77946