TOI-3757 b
Exoplanet known for its low density
From Wikipedia, the free encyclopedia
TOI-3757 b is a gas giant exoplanet located in the constellation of Auriga[2] 578 light years, or 177 parsecs, away from Earth.[3] It is well known for having a low density; as a result, it has been monikered the 'fluffiest planet ever'[4] and the 'marshmallow world'.[5] Its density is 0.27+0.05
−0.04 g/cm3,[3] so low that it could float in a bathtub large enough to hold it.[6] It is the least dense planet discovered around a red dwarf star, and also has the lowest metallicity of an gas giant around a red dwarf.[7][3]
Artistic representation of TOI-3757b | |
| Discovery[1] | |
|---|---|
| Discovered by | Kanodia et al. |
| Discovery date | 2022 |
| Transit | |
| Orbital characteristics[1] | |
| 0.03845±0.00043 AU | |
| Eccentricity | 0.14±0.06 |
| 3.438753±0.000004 d | |
| Inclination | 86.76+0.20 −0.23° |
| 130±23° | |
| Star | TOI-3757 |
| Physical characteristics[1] | |
| 12.0+0.4 −0.5 R🜨 | |
| Mass | 85.3+8.8 −8.7 M🜨 |
Mean density | 0.27+0.05 −0.04 g/cm3 |
| Temperature | 759±13 K[a] |
Physical characteristics
Mass and radius
The planet has a mass of only 0.27 Jupiter masses but a radius of 1.07 Jupiter radii, resulting in its extremely low density.
Host star
TOI-3757 is a M0 red dwarf star, which are very rare hosts for gas giant planets.[3]
Orbit
TOI-3757b has a small orbit, having a semimajor axis at 0.04 astronomical units and an orbital period of just 3 days.[1]
See also
Notes
- assuming the planet is a black body and albedo is 0 with perfect energy redistribution
