HD 40307 b
Orbiting HD 40307
HD 40307 b is an exoplanet orbiting the star HD 40307, discovered in 2009 using the Radial Velocity method.
Minimum Mass (M sin i)
4.00
Earth masses
Orbital Period
4.3
days
Distance
12.9
parsecs
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
4.00
Radial-velocity minimum
Equilibrium Temperature
Unknown
Parameter source: Tuomi et al. 2013
Orbital Period
4.312+0.001−0.001days
Semi-Major Axis
0.0468+0.0024−0.0023au
M sin(i) (Earth masses)
4.00+0.80−0.70
M sin(i) (Jupiter masses)
0.0126+0.0025−0.0022
Eccentricity
0.2000+0.1400−0.1600
Argument of Periastron
194.8+45.8−57.3deg
Radial Velocity Semi-Amplitude
1.94+0.31−0.27m/s
Distance from Earth
12.9 pc (~42 ly)
Spectral Type
K2.5 V
Temperature
4956 K
Mass (Solar)
0.77 M☉
Radius (Solar)
Unknown
Luminosity
-0.64 log L☉
Planets in System
5
Stars in System
1
Coordinates (RA, Dec)
88.5172°, -60.0237°
Discovery Method
Radial Velocity
Discovery Year
2009
Source ID: HD 40307 b
HD 40307 b orbits HD 40307 and was reported in 2009 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 4 Earth masses (M sin i) and an orbital period of 4.31 days.
Catalog data places the system at about 12.9 parsecs from Earth, a host star classified as K2.5 V, and 5 known planets in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open HD 40307More planets in this system