LHS 1140 c

Planet· orbits the Sun

LHS 1140 c - the inner transiting planet, a hot rocky super-Earth (~1.9 Earth masses, ~1.3 Earth radii) on a 3.8-day orbit. Because it transits, its size and rocky density are measured. Its surface has never been seen.

Open in 3D viewSee LHS 1140 c in the live, interactive 3D map

Key facts

Mass
1.14 × 10²⁵ kg
1.91 M⊕
Radius
8,104 km
1.27× wider than Earth
Surface gravity
11.6 m/s²
1.18× Earth's
Year
3.78 Earth days
Distance from LHS 1140
4,039,143 km

Science

Physical

Mass
1.14 × 10²⁵ kg · 1.91 M⊕
Radius
8,104 km · 1.27× wider than Earth
Density
5,117 kg/m³ · 5.1× water
Surface gravity
11.6 m/s² · 1.18× Earth's
Escape velocity
13.7 km/s · 1.23× Earth's

Orbital

Semi-major axis
4,039,143 km
Eccentricity
0.05
Inclination
0.00 °
Orbital period
3.8 days
Perihelion
3,837,185 km
Aphelion
4,241,100 km
Mean orbital velocity
77.7 km/s

Composition

Bulk composition
A rocky super-Earth of ~1.9 Earth masses and ~1.3 Earth radii — its transit gives a real size and a rocky density. The map shows a Vision-mode rocky impression (dual-labelled as a concept); its real surface has never been seen, and Realism shows a flat spectral colour.
Surface appearance
Appearance based on ESO/M. Kornmesser's artist's concept. No spacecraft has imaged this world, so its real appearance is unknown — The surface shown is an artistic representation, shown only in Vision mode; Realism shows a plain spectral colour.

Radiation & temperature

Insolation
5.21 S⊕ · 5.21× the sunlight Earth receives
Equilibrium temperature
422 K (149 °C)

Discovery & history

Method
Transit detection
Name
Designated 'c' under the IAU convention that letters a star's planets 'b', 'c', 'd'... in the order they are discovered (the star itself is the unwritten 'a').

Found transiting alongside planet b and confirmed by radial velocity (2018) - a compact, rocky inner companion.

Images

No official imagery available — this object has never been visited and no officially-licensed depiction exists.