This page summarises the information held within TEPCat for the transiting planetary system TOI-198. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2023AJ....165..134O | |
| Date of discovery paper | 2023 / 1 / 25 | y / m / d |
| Data/telescope used for discovery | TESS | |
| Right ascension | 00 09 04.36 | h m s |
| Declination | −27 07 19.7 | d m s |
| Right ascension (decimal) | 2.26817 | degrees |
| Declination (decimal) | -27.12214 | degrees |
| V-band apparent magnitude | 11.67 | mag |
| K-band apparent magnitude | 8.14 | mag |
| Transit duration | 0.0942 ( 2.261 ) | day hour |
| Transit depth | 0.09 | % |
| Time of mid-transit | 2458356.37313 ± 0.00089 | HJD or BJD |
| Orbital period | 10.215213 ± 0.000011 | days |
| Reference for orbital ephemeris | 2026A+A...706A.166Z |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 3801 ± 100 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.66 ± 0.10 | dex |
| Stellar mass | 0.417 ± 0.045 | Msun |
| Stellar radius | 0.418 ± 0.029 | Rsun |
| Stellar logarithmic surface gravity | 4.81 ± 0.10 | c.g.s. |
| Stellar mean density | ρsun g cm-3 | |
| Orbital eccentricity | 0.0 +0.15 −0.0 | |
| Orbital semimajor axis | 0.0675 +0.0067 −0.0082 | AU |
| Planetary mass | 0.0100 ± 0.0020 ( 3.18 ± 0.64 ) | Mjup Mearth |
| Planetary radius | 0.121 ± 0.012 ( 1.36 ± 0.13 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 | |
| Planetary mean density | 5.2 +3.2 −2.1 ( 6.9 +4.2 −2.8 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 456 +34 −27 | K |
| Reference of detailed study | 2026A+A...706A.166Z |
TOI-198 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2026/08/12 John Southworth (Keele University, UK)