Kepler-9 b
Orbiting Kepler-9
Kepler-9 b is an exoplanet orbiting the star Kepler-9, discovered in 2010 using the Transit method. It is a Neptune-sized world.
Radius
8.29
Earth radii
Mass
43.40
Earth masses
Orbital Period
19.2
days
Distance
628.3
parsecs
Radius (Earth radii)
8.29
Mass (Earth masses)
43.40
Measured
Equilibrium Temperature
Unknown
Parameter source: Borsato et al. 2019
Orbital Period
19.239+0.000−0.000days
Semi-Major Axis
0.1430+0.0070−0.0060au
Planet Mass (Earth masses)
43.40+1.60−2.00
Planet Mass (Jupiter masses)
0.1366+0.0050−0.0063
Eccentricity
0.0609+0.0010−0.0013
Argument of Periastron
357.0+0.5−0.4deg
Distance from Earth
628.3 pc (~2049 ly)
Spectral Type
Unknown
Temperature
5774 K
Mass (Solar)
1.02 M☉
Radius (Solar)
0.96 R☉
Luminosity
-0.04 log L☉
Planets in System
3
Stars in System
1
Coordinates (RA, Dec)
285.5740°, 38.4008°
Discovery Method
Transit
Discovery Year
2010
Source ID: Kepler-9 b
Kepler-9 b orbits Kepler-9 and was reported in 2010 and was detected with the Transit method.
Published measurements list a radius of 8.29 Earth radii, a mass of 43.4 Earth masses, and an orbital period of 19.24 days.
Catalog data places the system at about 628.3 parsecs from Earth and 3 known planets in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open Kepler-9More planets in this system