The GJ 15 A System

2 planets 2 stars Andromeda

GJ 15 A is a planetary system in the constellation Andromeda hosting 2 confirmed exoplanets around 2 stars, about 12 light-years from Earth.

Star GJ 15 A and Its Habitable Zone

GJ 15 A

Spectral type: M1
Surface temperature: 3,607 K (Sun: 5,772 K)
Mass: 0.38 M☉
Radius: 0.38 R☉
Luminosity: 0.0221 L☉

GJ 15 A b GJ 15 A c →

Too hot Optimistic habitable zone Conservative habitable zone Too cold

Habitable zone of GJ 15 A: 0.122–0.314 AU (conservative: 0.154–0.297 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.

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All 2 Planets in the GJ 15 A System

Planet	Type	Orbit	Radius	ESI	Discovered
GJ 15 A b	Super Earth	11 d	—	0.53	2014
GJ 15 A c	Neptune-like	7,600 d	—	0.12	2018

Discovery History

The first planet found here, GJ 15 A b, was discovered in 2014 using the radial velocity method. The most recent addition, GJ 15 A c, followed in 2018.

2014 — GJ 15 A b (Radial Velocity)
2018 — GJ 15 A c (Radial Velocity)

Frequently Asked Questions About GJ 15 A

How many planets does GJ 15 A have?

GJ 15 A has 2 confirmed exoplanets distributed around its 2 stars. More may await discovery.

Are any planets in the GJ 15 A system habitable?

None of the known planets in GJ 15 A orbit within the star's habitable zone.

How far away is GJ 15 A?

GJ 15 A is about 12 light-years from Earth in the constellation Andromeda.

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