AU Mic b
Orbiting AU Mic
AU Mic b is an exoplanet orbiting the star AU Mic, discovered in 2020 using the Transit method. It is a Neptune-sized world.
Radius
4.79
Earth radii
Mass
8.99
Earth masses
Orbital Period
8.5
days
Distance
9.7
parsecs
Equilibrium Temp
555
K
Radius (Earth radii)
4.79
Mass (Earth masses)
8.99
Measured
Equilibrium Temperature
555 K
Parameter source: Mallorquín et al. 2024
Orbital Period
8.463+0.000−0.000days
Semi-Major Axis
0.0700+0.0060−0.0070au
Planet Mass (Earth masses)
8.99+2.61−2.67
Planet Mass (Jupiter masses)
0.0283+0.0082−0.0084
Eccentricity
0.0700+0.0900−0.0400
Argument of Periastron
-52.0+43.0−92.8deg
Radial Velocity Semi-Amplitude
3.80+1.09−1.09m/s
Distance from Earth
9.7 pc (~32 ly)
Spectral Type
M1 V
Temperature
3540 K
Mass (Solar)
0.64 M☉
Radius (Solar)
0.86 R☉
Luminosity
-0.98 log L☉
Planets in System
4
Stars in System
1
Coordinates (RA, Dec)
311.2911°, -31.3424°
Discovery Method
Transit
Discovery Year
2020
Source ID: AU Mic b
AU Mic b orbits AU Mic and was reported in 2020 and was detected with the Transit method.
Published measurements list a radius of 4.79 Earth radii, a mass of 8.99 Earth masses, an orbital period of 8.46 days, and an equilibrium temperature near 555 K.
Catalog data places the system at about 9.7 parsecs from Earth, a host star classified as M1 V, and 4 known planets in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open AU Mic