Gliese 357

Gliese 357

system

Gliese 357 is a red dwarf 30.8 light-years away in Hydra with three planets. The innermost, GJ 357 b, transits — a 'hot Earth' with a measured size — while the outermost, GJ 357 d, is a super-Earth in the habitable zone, among the nearer temperate worlds known.

Open in 3D viewSee Gliese 357 in the live, interactive 3D map

Key facts

Type
Red dwarf + 3 planets
Distance
30.8 light-years
Confirmed planets
3
Notable
Transiting hot-Earth + HZ super-Earth

Science

Classification

Type
Single red-dwarf system
Central star
Gliese 357 — M2.5V red dwarf (~3505 K, 0.34 M☉)

Planets

Confirmed planets
3 · b (transits), c, d (HZ super-Earth)
Measured
GJ 357 b has a real size + density (it transits)
Habitable zone
GJ 357 d, a temperate super-Earth (RV minimum mass)

Distance

Distance
30.8 light-years · in Hydra

How we know

Note
Three confirmed planets (NASA Exoplanet Archive, checked 2026-07-07): b transits (real size + density), c and d are radial-velocity (minimum masses). Map distance is symbolic; the real gap is 30.8 light-years.

Discovery & history

Name
A catalogue designation (Gliese 357); no proper name.

NASA's TESS caught GJ 357 b transiting in 2019; radial-velocity follow-up revealed two more planets, including the habitable-zone GJ 357 d.

Images

Artist's impression of the habitable-zone super-Earth GJ 357 d — an artist's concept, not a photograph.
NASA's Goddard Space Flight Center / Chris Smith (public domain) · Wikimedia Commons

Images from open archives · credit shown per image