Table 5
Median values and 68% confidence intervals for the parameters of TOI-1680 b obtained using EXOFASTv2.
| Parameter | Description | Best-fit value |
|---|---|---|
| Stellar parameters | ||
| M* | Mass (M⊙) | 0.1798 ± 0.0044 |
| R* | Radius (R⊙) |  |
| L* | Luminosity (L⊙) |  |
| ρ* | Density (cgs) |  |
| log ɡ | Surface gravity (cgs) |  |
| Teff | Effective temperature (K) |  |
| Planetary parameters | ||
| P | Orbital period (days) |  |
| RP | Planet radius (R⊕) |  |
| TC | Transit time (BJDTDB) |  |
| a | Semi-major axis (AU) |  |
| i | Inclination (degrees) |  |
| TC | Equilibrium temperature(a) (K) | 404 ± 14 |
| RP/R★ | Planet-to-star radius ratio | 0.0638 ± 0.0015 |
| a/R★ | Semi-major axis in stellar radii |  |
| δ | (RP/R★)2 |  |
| δI | Transit depth in I (fraction) | 0.00472 ± 0.00020 |
| δi′ | Transit depth in i′ (fraction) |  |
| δr′ | Transit depth in r′ (fraction) |  |
| δz′ | Transit depth in z′ (fraction) |  |
| δTESS | Transit depth in TESS (fraction) |  |
| τ | Ingress/egress transit duration (days) |  |
| T14 | Total transit duration (days) |  |
| Tfwhm | FWHM transit duration (days) |  |
| b | Transit impact parameter |  |
| 〈F〉 | Incident flux (109 erg s−1 cm−2) |  |
| d/R* | Separation at mid-transit |  |
| Predicted parameters | ||
| MP | Planet mass(b) (M⊕) |  |
| K | RV semi-amplitude (m s−1) |  |
| TSM | Transmission spectroscopy metric | 7.82 |
| MP/M* | Planet-to-star mass ratio |  |
| ρP | Planet mean density (cgs) |  |
Notes. (a) The equilibrium temperature corresponds to a case with null albedo and an 100% efficient heat recirculation. (b) The planetary mass is estimated from the planetary radius from transit using the Chen & Kipping (2017) mass–radius relation. The radial velocity semi-amplitude (K) is predicted using the estimated mass.
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