The star
The star
TOI-4504
- Type
- K1 V
- Surface
- ≈ 5,315 K
- Size
- 0.93 × the Sun
- Mass
- 0.88 × the Sun
- Brightness
- 0.62 × the Sun
- Habitable zone
- 0.607–1.45 AU
The planets
TOI-4504
TOI-4504 b
- Year
- 2.43 days
- Distance from star
- 0.0338 AU
- Mass
- 1.4e+02 Earths
- Size
- 2.6 × Earth
- Temperature
- ≈ 1345 K (+1072 °C)
- Found
- 2024, transit (Transiting Exoplanet Survey Satellite (TESS))
TOI-4504
TOI-4504 d
- Year
- 41.29 days
- Distance from star
- 0.222 AU
- Mass
- 2 Jupiters
- Size
- 11 × Earth
- Temperature
- ≈ 525 K (+252 °C)
- Found
- 2024, transit timing variations (Multiple Observatories)
TOI-4504
TOI-4504 c
- Year
- 82.82 days
- Distance from star
- 0.359 AU
- Mass
- 2.6 Jupiters
- Size
- 11 × Earth
- Temperature
- ≈ 412 K (+139 °C)
- Found
- 2024, 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.
Early and late
A known planet arrives early or late for its transits, betraying the pull of another, unseen planet.
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.