GJ 1002 b
Planet· orbits GJ 1002
GJ 1002 b - a roughly Earth-mass planet (minimum mass ~1.1 Earth) orbiting in the inner habitable zone every 10 days. RV-only, so its mass is a minimum and its size a model estimate; whether it is rocky or holds water is unknown.
Open in 3D viewSee GJ 1002 b in the live, interactive 3D map
Key facts
Minimum mass
6.45 × 10²⁴ kg
1.08 M⊕
Year
10.35 Earth days
Distance from GJ 1002
6,836,623 km
Science
Physical
- Minimum mass (m·sin i)
- 6.45 × 10²⁴ kg · 1.08 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 ~1.1-Earth-mass world; true size unknown.
Orbital
- Semi-major axis
- 6,836,623 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
- 10.3 days
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Perihelion
- 6,836,623 km
- Computed from the orbital elements
- Aphelion
- 6,836,623 km
- Computed from the orbital elements
- Mean orbital velocity
- 48.1 km/s
- Computed from the orbital elements
Composition
- Bulk composition
- A roughly Earth-mass planet (minimum mass ~1.1 Earth) in the inner habitable zone; whether it is rocky or holds water is unknown, and it has never been 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
- 0.673 S⊕ · 67% of the sunlight Earth receives
- Computed from GJ 1002's luminosity and the orbital distance (inverse-square; Earth's sunlight = 1).
- Equilibrium temperature
- 231 K (-42 °C)
- Computed model value for its habitable-zone orbit — not measured.
Discovery & history
- Method
- Radial-velocity detection (stellar wobble)
- Name
- Designated 'b' 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').
One of two habitable-zone planets announced in 2022 from ESPRESSO + CARMENES radial-velocity data.
Images
No official imagery available — this object has never been visited and no officially-licensed depiction exists.