Terrestrial planet · TOI-540

TOI-540 b

ExoplanetsDiscovered 2020

Scientific overview

TOI-540 b is a terrestrial planet orbiting TOI-540, completing an orbit every 1.2391 days, about 46 light-years from Earth. It was discovered in 2020 using the transit method.

Host star

TOI-540

Spectral type

M V

Temperature

3,216 K

Mass

0.159 M☉

Discovery and detection

Detection method

Transit Method

Discovery year

2020

Discovered at

TESS

Knowledge connections

OrbitsTOI-540
Discovered by methodTransit Method
Discovered by missionTESS
Catalogued inNASA Exoplanet Archive

Quick facts

Class: Terrestrial planet
Host star: TOI-540
Discovery method: Transit Method
Discovery year: 2020
Orbital period: 1.2391 d
Semi-major axis: 0.0122 AU
Eccentricity: 0
Radius: 0.9 R⊕
Mass: 0.67 M⊕
Density: 5.07 g/cm³ · derived
Equilibrium temp.: 611 K
Insolation: 23.4 S⊕
Distance: 46 ly

Density is derived from the archive mass and radius via ρ = M / (4⁄3·π·r³); all other values are catalogued measurements.

Derived values

Computed from source-backed inputs via standard formulae — not observations. Every input and constant is traced below.

Bulk density5.07 g/cm³derived
Formula & inputs
Formula: ρ = M / (4⁄3·π·r³) (v1.0.0, impl v1.0.0)
Inputs:
- massEarth = 0.67 M⊕ · NASA
- radiusEarth = 0.9 R⊕ · NASA
Assumptions: M⊕ = 5.972e+24 kg, R⊕ = 6371000 m (IAU 2015 B3 nominal); Assumes a uniform sphere.
Limitations: Withheld above 30 g/cm³ (inconsistent mass/radius inputs).; Archive mass/radius carry no propagated uncertainty here.
Uncertainty: not propagated (inputs carry no catalogued uncertainty)
Computed as of 2026-06-29.

Quality & authority

Partial

Unreviewed

Description: Complete
Source coverage: Partial
Relationship coverage: Complete
Review coverage: None
Citation coverage: None
Image coverage: Not applicable

Data from the NASA Exoplanet Archive. See source quality.