GJ 1002 c
Planet· orbits GJ 1002
GJ 1002 c - a second roughly Earth-mass planet (minimum mass ~1.4 Earth) on a 21-day orbit in the outer habitable zone, cooler than planet b. RV-only: minimum mass, model-estimate size, never imaged.
Open in 3D viewSee GJ 1002 c in the live, interactive 3D map
Key facts
Minimum mass
8.12 × 10²⁴ kg
1.36 M⊕
Year
21.2 Earth days
Distance from GJ 1002
11,040,323 km
Science
Physical
- Minimum mass (m·sin i)
- 8.12 × 10²⁴ kg · 1.36 M⊕
- Radial-velocity detection measures m·sin i; the true mass depends on the unknown orbital inclination.
- Radius
- Not measured
- No transit — radius is a model estimate for a ~1.4-Earth-mass world; true size unknown.
Orbital
- Semi-major axis
- 11,040,323 km
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Eccentricity
- 0
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Inclination
- 0.00 °
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Orbital period
- 21.2 days
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Perihelion
- 11,040,323 km
- Computed from the orbital elements
- Aphelion
- 11,040,323 km
- Computed from the orbital elements
- Mean orbital velocity
- 37.9 km/s
- Computed from the orbital elements
Composition
- Bulk composition
- A roughly Earth-mass planet (minimum mass ~1.4 Earth) in the cooler, outer habitable zone; never imaged.
- 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 Visual mode; Realism shows a plain spectral colour.
Radiation & temperature
- Insolation
- 0.258 S⊕ · 26% of the sunlight Earth receives
- Computed from GJ 1002's luminosity and the orbital distance (inverse-square; Earth's sunlight = 1).
- Equilibrium temperature
- 182 K (-91 °C)
- Computed model value for its outer habitable-zone orbit — not measured.
Discovery & history
- Method
- Radial-velocity detection (stellar wobble)
- 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').
The outer of the two temperate planets found in 2022 around this nearby faint red dwarf.
Images
No official imagery available — this object has never been visited and no officially-licensed depiction exists.