The GJ 180 System

3 planets 1 in habitable zone Eridanus

GJ 180 is a planetary system in the constellation Eridanus hosting 3 confirmed exoplanets, about 39 light-years from Earth. One of its planets orbits within the habitable zone, where liquid water could exist on a planetary surface.

GJ 180: Star and Habitable Zone

GJ 180

Spectral type: M2 V
Surface temperature: 3,371 K (Sun: 5,772 K)
Mass: 0.43 M☉
Luminosity: 0.0130 L☉

GJ 180 b GJ 180 c GJ 180 d

Too hot Optimistic habitable zone Conservative habitable zone Too cold

Habitable zone of GJ 180: 0.093–0.244 AU (conservative: 0.118–0.231 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.

See the full interactive habitable-zone view in the Exoplanet Explorer app ›

All 3 Planets in the GJ 180 System

Planet	Type	Orbit	Radius	ESI	Discovered
GJ 180 b	Super Earth	17 d	—	0.67	2014
GJ 180 c HZ	Super Earth	24 d	—	0.70	2014
GJ 180 d	Super Earth	106 d	—	0.48	2020

Discovery History

The first planet found here, GJ 180 b, was discovered in 2014 using the radial velocity method. The most recent addition, GJ 180 d, followed in 2020.

2014 — GJ 180 b (Radial Velocity)
2014 — GJ 180 c (Radial Velocity)
2020 — GJ 180 d (Radial Velocity)

Frequently Asked Questions About GJ 180

How many planets does GJ 180 have?

GJ 180 has 3 confirmed exoplanets. More may await discovery.

Are any planets in the GJ 180 system habitable?

One planet in the system orbits within the habitable zone, where liquid water could exist. Actual habitability depends on atmospheres and composition, which are not yet known.

How far away is GJ 180?

GJ 180 is about 39 light-years from Earth in the constellation Eridanus.

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