WASP-94
Binary star system
From Wikipedia, the free encyclopedia
WASP-94 is a binary star system located about 690 light-years (210 parsecs) away in the constellation Microscopium. It consists of two F-type stars separated by 15″, corresponding to a projected separation of 2700 au. Both stars are known to host exoplanets.[3]
The binary system was first observed by John Herschel in 1834 and catalogued as HJ 5234. The designation WASP-94 comes from the Wide Angle Search for Planets, and has been used since the system was found to host planets in 2014.[3] While the two stars have similar spectral types, they differ in elemental abundance – WASP-94A has fewer volatile elements and more refractory elements than WASP-94B.[6]
Planetary system
The two stars host a single known planet each. Both are hot Jupiters, gas giant planets completing orbits around their stars in just a few days.[3]
WASP-94Ab transits its host star, and it has also been detected by the radial velocity method.[3] As a result, both its size and mass are known, which show that it is a low-density planet with a highly inflated radius. It has an equilibrium temperature of 1508±75 K.[10] Its orbit is retrograde and misaligned with the rotation of its host star.[11] The atmosphere of WASP-94Ab appears to be relatively free of clouds, with sodium,[10] water vapor and carbon dioxide being detected.[12]
WASP-94Bb is a non-transiting planet that has been detected only by radial velocity, so it has no measured radius and true mass. Its minimum mass is 62% the mass of Jupiter.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.452+0.035 −0.032 MJ |
0.055±0.001 | 3.9501907+0.0000044 −0.0000030 |
<0.064[13] | 88.7±0.7° | 1.72+0.06 −0.05 RJ |
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥0.618+0.028 −0.029 MJ |
0.0335+0.0006 −0.0005 |
2.00839±0.00024 | 0 | — | — |