Gl 725 A

Planetary system · 11.5 light-years away · also HD 173739, HIP 91768

Gl 725 A is 11.5 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M3 star; the first was found in 2025 by radial velocity (Multiple Observatories).

Fly there in 3D

Worth knowing

Gl 725 A b goes round its star every 11.2 days, 8 times as often as Mercury goes round the Sun.

Gl 725 A is one of 2 stars in its system: the other is drawn where the Washington Double Star Catalog measures it on the sky.

The star

Spectral typeM3
Surface temperature3,433 K
Mass0.33 solar masses
Radius0.351 solar radii
Luminosity0.01552 times the Sun
Apparent magnitude8.94
Ageabout 6.2 billion years
Distance from the Sun11.5 light-years (3.5 parsecs)
Position (J2000)RA 280.6834°, Dec 59.6381°
ConstellationDraco

The other star

Gl 725 B is a M3.5 star of magnitude 9.96, with a computed orbit. In 2025 it was 10.9″ from Gl 725 A, at position angle 185° (Washington Double Star Catalog, 18428+5938 STF2398 AB): 38.4 AU on the sky at this distance. The true distance can only be larger.

Planets (1)

PlanetYearOrbitRadiusMassFound
Gl 725 A b11.2 days0.0680 AU1.48 R⊕ estimated2.78 M⊕ minimumRadial Velocity, 2025

Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.

Sources

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