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Table 3
System parameters for WASP-78b.
| Parameter | Value |
|
|
|
| Transit epoch (HJD, UTC), T0 | 2 455 882.35878 ± 0.00053 |
| Orbital period, P | 2.17517632 ± 0.0000047 d |
| Transit duration, T14 | 0.1953 ± 0.0013 d |
| Transit depth, (RP/R ∗ )2 | 0.0063 ± 0.0002 |
| Impact parameter, b | 0.417  |
| Stellar reflex velocity, K1 | 0.1136 ± 0.0096 km s-1 |
| Centre-of-mass velocity at time T0, γ | 0.4564 ± 0.0020 km s-1 |
| Orbital separation, a | 0.0362 ± 0.0008 AU |
| Orbital inclination, i | 83.2  ° |
| Orbital eccentricity, e | 0.0 (assumed) |
| Stellar density, ρ ⋆ | 0.125 ± 0.018 ρ⊙ |
| Stellar mass, M ⋆ | 1.33 ± 0.09 M⊙ |
| Stellar radius, R ⋆ | 2.20 ± 0.12 R⊙ |
| Stellar surface gravity, log g ⋆ | 3.88 ± 0.04 |
| Planet mass, MP | 0.89 ± 0.08 MJup |
| Planet radius, RP | 1.70 ± 0.11 RJup |
| Planet surface gravity, log gP | 2.84 ± 0.06 |
| Planet density, ρP | 0.18 ± 0.04 ρJup |
| Planet equilibrium temperature, TP | 2350 ± 80 K |
Notes. The planet equilibrium temperature, TP, assumes a Bond albedo of A = 0 and even redistribution of heat around the planet. Limb-darkening coefficients were a1 = 0.388, a2 = 0.609, a3 = −0.395 and a4 = 0.075.
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