TOI-5624 b
From Wikipedia, the free encyclopedia
 Artistic depiction of the TOI-5624 system (sizes to scale) compared to Mercury's orbit. TOI-5624 b is the innermost planet with in the system, designated as 5624 b. | |
| Discovery | |
|---|---|
| Discovered by | Andrea Bonfant et al. |
| Discovery site | Transiting Exoplanet Survey Satellite |
| Discovery date | April 22, 2026 |
| Transit | |
| Orbital characteristics | |
| 0.04201+0.00041 −0.00043 AU | |
| Eccentricity | 0 (fixed) |
| 3.3903473±0.0000054 d | |
| Inclination | 89.41+0.41 −0.51 |
| 90 (fixed) | |
| Semi-amplitude | 4.46±0.65 m/s |
| Star | TOI-5624 |
| Physical characteristics | |
| 2.314±0.035 R🜨 | |
| Mass | 9.4±1.4 M🜨 |
Mean density | 4.00+0.60 −0.59 g/cm3 |
| Temperature | 1,136 ± 15 K (862.9 ± 15.0 °C; 1,585.1 ± 27.0 °F) |
TOI-5624 b is the innermost and smallest exoplanet discovered in the TOI-5624 system, located approximately 331 light-years from Earth in the constellation Ursa Major. The planet was confirmed in late April 2026 using the transit method.[1][2]
Physical characteristics
| Neptune | TOI-5624 b |
|---|---|
 |
 |
The object is classified as a dense hot sub-Neptune, with a mass of 9.4±1.4 M🜨 and a radius of 2.314±0.035 R🜨.[1][2] These parameters were determined using the radial velocity method and the European CHEOPS telescope. Its average density, equal to 4.00+0.60
−0.59 g/cm3, indicates the presence of a significant solid core surrounded by a less massive gaseous envelope.[1][2]
Orbit
The planet is the closest to its host star, and therefore its orbital period is 3.3903473±0.0000054 Earth days, at a distance of 0.04201+0.00041
−0.00043 AU.[1][2] Due to its proximity to the star, the equilibrium temperature reaches 1136 K or 863 °C.[1][2]
.jpg)
