The star
The star
kap And
- Type
- B9 IVn
- Surface
- ≈ 11,327 K
- Size
- 2.11 × the Sun
- Mass
- 2.77 × the Sun
- Brightness
- 62.6 × the Sun
- Habitable zone
- 7.52–13.2 AU
The planets
kap And
kap And b
- Year
- 245.2 years
- Distance from star
- 55 AU
- Mass
- 17 Jupiters
- Size
- 16 × Earth
- Temperature
- ≈ 1791 K (+1518 °C)
- Found
- 2012, imaging (Subaru Telescope)
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.