TOI-4504 d
TOI-4504 d is a cold gas giant orbiting TOI-4504 in the constellation Carina. It lies about 1,117 light-years from Earth and was discovered in 2024 using the transit timing variations method.
How Big Is TOI-4504 d?
TOI-4504 d has a radius of 11.26 times that of Earth, or 1.00 times the radius of Jupiter. Its mass is 643 times that of Earth, giving it a density of 2.48 g/cm³ — between that of rocky and gaseous planets.
Is TOI-4504 d in the Habitable Zone?
The position of TOI-4504 d relative to the habitable zone of TOI-4504 cannot be precisely determined from the available orbital data.
Temperature on TOI-4504 d
The equilibrium temperature of TOI-4504 d is about 525 K (252 °C) — hotter than anywhere on Earth. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C.
Orbit and Year Length
A year on TOI-4504 d — one full orbit around TOI-4504 — lasts 41.3 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.222 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.29).
How Was TOI-4504 d Discovered?
TOI-4504 d was discovered in 2024 using the transit timing variations method, with observations from Multiple Observatories.
Transit timing variations reveal a planet through its gravitational tug on a sibling planet, which makes that sibling's transits arrive slightly early or late. The pattern of these deviations betrays the hidden planet's mass and orbit.
How Far Away Is TOI-4504 d?
TOI-4504 d is 1,117.4 light-years (342.6 parsecs) from Earth. Light arriving here tonight left the planet about 1,117 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 19,666,240 years to make the journey.
The Host Star: TOI-4504
TOI-4504
- Mass
- 0.88 M☉
- Radius
- 0.93 R☉
The TOI-4504 Planetary System
TOI-4504 d is one of 3 known planets in the TOI-4504 system. Its siblings:
- TOI-4504 b (Super Earth)
- TOI-4504 c (Cold Gas Giant)
TOI-4504 d — Complete Data
| Radius | 11.260 Earth radii (1.005 Jupiter radii) |
|---|---|
| Mass | 643.00 Earth masses (2.020 Jupiter masses) |
| Density | 2.48 g/cm³ (Earth: 5.51) |
| Orbital period | 41.29 days |
| Orbital distance | 0.222 AU |
| Eccentricity | 0.293 |
| Equilibrium temperature | 525 K (252 °C) |
| Distance from Earth | 1,117.4 light-years (342.6 parsecs) |
| Constellation | Carina |
| Discovery method | Transit Timing Variations |
| Discovery facility | Multiple Observatories |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2026-08-06. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-4504 d
Is TOI-4504 d habitable?
TOI-4504 d is not known to orbit within the habitable zone of TOI-4504, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is TOI-4504 d?
TOI-4504 d is about 1,117 light-years from Earth in the constellation Carina. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 19,666,240 years to get there.
How big is TOI-4504 d compared to Earth?
TOI-4504 d has 11.26 times the radius of Earth and about 643 times its mass.
How long is a year on TOI-4504 d?
One orbit around TOI-4504 takes 41.3 Earth days.
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