GJ 1002

GJ 1002

system

GJ 1002 is a cool, very faint red dwarf 15.8 light-years away in Cetus. Two roughly Earth-mass planets circle it, and because the star is so dim, BOTH lie in its habitable zone despite orbiting in days to weeks. Their masses are radial-velocity minimums.

Open in 3D viewSee GJ 1002 in the live, interactive 3D map

Key facts

Type
Red dwarf + 2 planets
Distance
15.8 light-years
Confirmed planets
2
Notable
Both planets in the habitable zone

Science

Classification

Type
Single red-dwarf system
Central star
GJ 1002 — M5.5V red dwarf (~3024 K, 0.12 M☉)

Planets

Confirmed planets
2 · b and c, ~1 Earth mass each
Habitable zone
Both planets lie within it
Masses
Radial-velocity minimums (m·sin i)

Distance

Distance
15.8 light-years · in Cetus

How we know

Note
Two confirmed planets (NASA Exoplanet Archive, checked 2026-07-07), found by radial velocity around a very faint star — minimum masses, no measured sizes. Map distance is symbolic; the real gap is 15.8 light-years.

Discovery & history

Name
A catalogue designation (Gliese-Jahreiss 1002).

Its two temperate planets were announced in 2022 from ESPRESSO + CARMENES radial-velocity data — a delicate detection around a very dim star.

Images

Where to find it — in Cetus, the Sea Monster (IAU constellation chart). To the eye it is a single point of light; no telescope has imaged its surface.
IAU / Sky & Telescope, R. Sinnott & R. Fienberg (CC BY 3.0) · Wikimedia Commons

Images from open archives · credit shown per image