HD 154857 b
Orbiting HD 154857
HD 154857 b is an exoplanet orbiting the star HD 154857, discovered in 2004 using the Radial Velocity method.
Minimum Mass (M sin i)
778.68
Earth masses
Orbital Period
408.6
days
Distance
63.4
parsecs
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
778.68
Radial-velocity minimum
Equilibrium Temperature
Unknown
Parameter source: Stassun et al. 2017
Orbital Period
408.600+0.500−0.500days
Semi-Major Axis
1.2900+0.0200−0.0200au
M sin(i) (Earth masses)
778.68+34.96−34.96
M sin(i) (Jupiter masses)
2.4500+0.1100−0.1100
Eccentricity
0.4600+0.0200−0.0200
Radial Velocity Semi-Amplitude
48.30+1.00−1.00m/s
Distance from Earth
63.4 pc (~207 ly)
Spectral Type
Unknown
Temperature
5589 K
Mass (Solar)
1.96 M☉
Radius (Solar)
2.30 R☉
Luminosity
Unknown
Planets in System
2
Stars in System
1
Coordinates (RA, Dec)
257.8162°, -56.6810°
Discovery Method
Radial Velocity
Discovery Year
2004
Source ID: HD 154857 b
HD 154857 b orbits HD 154857 and was reported in 2004 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 778.68 Earth masses (M sin i) and an orbital period of 408.6 days.
Catalog data places the system at about 63.4 parsecs from Earth and 2 known planets in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open HD 154857More planets in this system