81 Cet b
Orbiting 81 Cet
81 Cet b is an exoplanet orbiting the star 81 Cet, discovered in 2008 using the Radial Velocity method.
Minimum Mass (M sin i)
1051.06
Earth masses
Orbital Period
1005.6
days
Distance
101.3
parsecs
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
1051.06
Radial-velocity minimum
Equilibrium Temperature
Unknown
Parameter source: Teng et al. 2023
Orbital Period
1005.570+1.840−1.940days
Semi-Major Axis
2.1040+0.0030−0.0030au
M sin(i) (Earth masses)
1051.06+24.79−21.29
M sin(i) (Jupiter masses)
3.3070+0.0780−0.0670
Eccentricity
0.0370+0.0150−0.0250
Epoch of Periastron
2453458.40+106.00−180.60days(JD)
Argument of Periastron
-166.7+54.4−36.0deg
Radial Velocity Semi-Amplitude
58.51+1.39−1.20m/s
Distance from Earth
101.3 pc (~330 ly)
Spectral Type
G5 III
Temperature
4734 K
Mass (Solar)
1.23 M☉
Radius (Solar)
11.21 R☉
Luminosity
1.76 log L☉
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
39.4244°, -3.3964°
Discovery Method
Radial Velocity
Discovery Year
2008
Source ID: 81 Cet b
81 Cet b orbits 81 Cet and was reported in 2008 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 1,051.06 Earth masses (M sin i) and an orbital period of 1,005.57 days.
Catalog data places the system at about 101.3 parsecs from Earth, a host star classified as G5 III, 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 81 Cet