TRAPPIST-1 · M8.0 V
TRAPPIST-1 e
Rank #27 of the ranked catalogue · Discovered by Transit in 2017
HZ 100% ⚠measured
0.367
Earth-2.0 index
0.892
Earth Similarity Index
100%
Habitable-zone probability
0.92 R⊕
Radius
Planet
Mass0.692 M⊕measured
Bulk density4.902 g/cm³
Orbital period6.1010 days
Semi-major axis0.02925 au
Eccentricity0.005
Incident flux0.646 S⊕
Equilibrium temperature227.9 K
Transit-time σ at 203040.0 minLinear propagation of published epoch and period errors; not a ranking input.
Maximum angular separation2.35 masReflected-light contrast 1.72e-7 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 coverage75%0% median composite-to-default difference over shared parameters.
Host star & system
HostTRAPPIST-1
Spectral typeM8.0 V
Effective temperature2566 K
Radius0.119 R☉
Mass0.090 M☉
Distance12.4 pc / 40.5 ly
DiscoveryTransit, 2017