The star
The star
2MASS J11550485-7919108
- Type
- red dwarf
- Surface
- ≈ 3,021 K
- Size
- 0.60 × the Sun
- Mass
- 0.59 × the Sun
- Brightness
- 0.0271 × the Sun
- Habitable zone
- 0.135–0.359 AU
The planets
2MASS J11550485-7919108
2MASS J11550485-7919108 b
- Year
- 18539.5 years
- Distance from star
- 587 AU
- Mass
- 20 Jupiters
- Size
- 12 × Earth
- Temperature
- ≈ 2506 K (+2233 °C)
- Found
- 2024, imaging (European Space Agency (ESA) Gaia Satellite)
Masses found by the wobble method are minimums, because the orbit's tilt is unknown. Temperatures are equilibrium estimates for a bare planet, before any atmosphere.
How we know
A direct picture
The star's glare is blocked or subtracted, leaving the planet's own faint light as a dot that moves along its orbit over the years.
Sources
- Planet and star parameters: NASA Exoplanet Archive, Planetary Systems Composite Parameters, retrieved 1 Nov 2026. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.
- Position: HYG Database v4.1 (CC BY-SA 4.0).
- Habitable zone: a simple estimate from the star's brightness (√L × 0.95 to 1.67 AU), shown as a guide.