Finding Earth 2.0
tau Cet · G8.5V

tau Cet g

Rank #770 of the ranked catalogue · Discovered by Radial Velocity in 2017

HZ 0%M sin i

0.109

Earth-2.0 index

0.473

Earth Similarity Index

0%

Habitable-zone probability

1.18 R⊕

Radius

Planet

Mass1.750 M⊕M sin i
Bulk density5.850 g/cm³
Orbital period20.0000 days
Semi-major axis0.13300 au
Eccentricity0.060
Incident flux27.983 S⊕
Equilibrium temperature584.6 K
Maximum angular separation36.91 masReflected-light contrast 1.37e-8 at Aᵍ = 0.30 and Lambertian quadrature.
Composite parameter sources5 · mixedThe archive may select different publications for different parameters; mixed-source is disclosed, not automatically penalised.
Default-solution coverage50%0% median composite-to-default difference over shared parameters.

Host star & system

Hosttau Cet
Spectral typeG8.5V
Effective temperature5310 K
Radius0.830 R☉
Mass0.783 M☉
Distance3.6 pc / 11.8 ly
DiscoveryRadial Velocity, 2017