The star
The star
HD 93963 A
- Type
- G0 V
- Surface
- ≈ 5,908 K
- Size
- 1.03 × the Sun
- Mass
- 1.08 × the Sun
- Brightness
- 1.17 × the Sun
- Habitable zone
- 0.805–1.89 AU
The planets
HD 93963 A
HD 93963 A b
- Year
- 1.04 days
- Distance from star
- 0.0206 AU
- Mass
- 2.8 Earths
- Size
- 1.5 × Earth
- Temperature
- ≈ 1842 K (+1569 °C)
- Found
- 2022, transit (Transiting Exoplanet Survey Satellite (TESS))
HD 93963 A
HD 93963 A c
- Year
- 3.65 days
- Distance from star
- 0.0473 AU
- Mass
- 18 Earths
- Size
- 3.1 × Earth
- Temperature
- ≈ 1212 K (+939 °C)
- Found
- 2022, transit (Transiting Exoplanet Survey Satellite (TESS))
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
The shadow
The planet passes in front of its star and dims it by a fraction of a percent, every orbit. The dip gives the planet's size and year.
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.