The Barnard's star System

4 planets Ophiuchus

Barnard's star is a planetary system in the constellation Ophiuchus hosting 4 confirmed exoplanets, about 6 light-years from Earth.

Barnard's star: Star and Habitable Zone

Barnard's star

Spectral type: M3.5-4 V
Surface temperature: 3,195 K (Sun: 5,772 K)
Mass: 0.16 M☉
Radius: 0.19 R☉
Luminosity: 0.0036 L☉

Barnard b Barnard c Barnard d Barnard e

Too hot Optimistic habitable zone Conservative habitable zone Too cold

Habitable zone of Barnard's star: 0.049–0.129 AU (conservative: 0.062–0.122 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.

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All 4 Planets in the Barnard's star System

Planet	Type	Orbit	Radius	ESI	Discovered
Barnard b	Terrestrial	3.2 d	—	—	2024
Barnard c	Terrestrial	4.1 d	—	—	2025
Barnard d	Terrestrial	2.3 d	—	—	2025
Barnard e	Terrestrial	6.7 d	—	—	2025

Discovery History

The first planet found here, Barnard b, was discovered in 2024 using the radial velocity method. The most recent addition, Barnard e, followed in 2025.

2024 — Barnard b (Radial Velocity)
2025 — Barnard c (Radial Velocity)
2025 — Barnard d (Radial Velocity)
2025 — Barnard e (Radial Velocity)

Frequently Asked Questions About Barnard's star

How many planets does Barnard's star have?

Barnard's star has 4 confirmed exoplanets. More may await discovery.

Are any planets in the Barnard's star system habitable?

None of the known planets in Barnard's star orbit within the star's habitable zone.

How far away is Barnard's star?

Barnard's star is about 6 light-years from Earth in the constellation Ophiuchus.

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