HD 22781 b
Orbiting HD 22781
HD 22781 b is an exoplanet orbiting the star HD 22781, discovered in 2011 using the Radial Velocity method.
Minimum Mass (M sin i)
4338.20
Earth masses
Orbital Period
528.1
days
Distance
32.6
parsecs
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
4338.20
Radial-velocity minimum
Equilibrium Temperature
Unknown
Parameter source: Díaz et al. 2012
Orbital Period
528.070+0.140−0.140days
Semi-Major Axis
1.1670+0.0390−0.0390au
M sin(i) (Earth masses)
4338.20+308.00−308.00
M sin(i) (Jupiter masses)
13.6500+0.9700−0.9700
Eccentricity
0.8191+0.0023−0.0023
Epoch of Periastron
2454881.40+0.12−0.12days
Argument of Periastron
315.9+0.6−0.6deg
Radial Velocity Semi-Amplitude
726.40+7.10−7.10m/s
Distance from Earth
32.6 pc (~106 ly)
Spectral Type
K1
Temperature
5027 K
Mass (Solar)
0.75 M☉
Radius (Solar)
Unknown
Luminosity
Unknown
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
55.2066°, 31.8259°
Discovery Method
Radial Velocity
Discovery Year
2011
Source ID: HD 22781 b
HD 22781 b orbits HD 22781 and was reported in 2011 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 4,338.2 Earth masses (M sin i) and an orbital period of 528.07 days.
Catalog data places the system at about 32.6 parsecs from Earth, a host star classified as K1, 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 22781