The GJ 887 System

4 planets 1 in habitable zone Piscis Austrinus

GJ 887 is a planetary system in the constellation Piscis Austrinus hosting 4 confirmed exoplanets, about 11 light-years from Earth. One of its planets orbits within the habitable zone, where liquid water could exist on a planetary surface.

GJ 887: Star and Habitable Zone

GJ 887

Spectral type: M1 V
Surface temperature: 3,688 K (Sun: 5,772 K)
Mass: 0.50 M☉
Radius: 0.47 R☉
Luminosity: 0.0368 L☉
Age: 2.9 billion years (Sun: 4.6)

GJ 887 b GJ 887 c GJ 887 d GJ 887 e

Too hot Optimistic habitable zone Conservative habitable zone Too cold

Habitable zone of GJ 887: 0.156–0.402 AU (conservative: 0.198–0.381 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.

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All 4 Planets in the GJ 887 System

Planet	Type	Orbit	Radius	ESI	Discovered
GJ 887 b	Super Earth	9.3 d	—	0.41	2020
GJ 887 c	Super Earth	22 d	—	0.55	2020
GJ 887 d HZ	Super Earth	51 d	—	—	2026
GJ 887 e	Terrestrial	4.4 d	—	—	2026

Discovery History

The first planet found here, GJ 887 b, was discovered in 2020 using the radial velocity method. The most recent addition, GJ 887 e, followed in 2026.

2020 — GJ 887 b (Radial Velocity)
2020 — GJ 887 c (Radial Velocity)
2026 — GJ 887 d (Radial Velocity)
2026 — GJ 887 e (Radial Velocity)

Frequently Asked Questions About GJ 887

How many planets does GJ 887 have?

GJ 887 has 4 confirmed exoplanets. More may await discovery.

Are any planets in the GJ 887 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 887?

GJ 887 is about 11 light-years from Earth in the constellation Piscis Austrinus.

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