GJ 1061

Star

GJ 1061 - a small, quiet red dwarf 12.0 light-years away in Horologium, host to three confirmed planets, one of which (d) sits in the temperate zone where liquid water could exist. One of the nearest multi-planet systems.

Open in 3D viewSee GJ 1061 in the live, interactive 3D map

Key facts

Mass

2.39 × 10²⁹ kg

0.12 M☉

Radius

108,529 km

16% of the Sun's radius

Surface temperature

2,953 K (2680 °C)

Luminosity

6.51 × 10²³ W

Spectral type

M5.5V (red dwarf)

Science

Physical

Mass: 2.39 × 10²⁹ kg · 0.12 M☉
Radius: 108,529 km · 16% of the Sun's radius
Density: 44,573 kg/m³ · 45× water
Spectral type: M5.5V (red dwarf)

Rotation

Note: Rotates slowly, roughly once every 125 days.

Composition

By mass: A red dwarf about 12% of the Sun's mass and 0.2% of its light; unusually quiet for its type.

Temperature

Surface: 2,953 K (2680 °C)

Radiation & temperature

Luminosity: 6.51 × 10²³ W · 0.0017 L☉
Surface temperature: 2,953 K (2680 °C)
Peak wavelength: 981 nm · near-infrared (mostly invisible to the eye)

Discovery & history

Name: A catalogue designation (Gliese-Jahreiss 1061); the star has no proper name.

Catalogued as a faint high-proper-motion star; in 2020 the CARMENES and HARPS/Red Dots teams found its three low-mass planets from years of radial-velocity monitoring.

Images

Where to find it — in Horologium, the Clock (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