This page summarises the information held within TEPCat for the transiting planetary system WASP-197. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2025AJ....169..334S | |
| Date of discovery paper | 2025 / 4 / 18 | y / m / d |
| Data/telescope used for discovery | WASP | |
| Right ascension | 10 42 31.37 | h m s |
| Declination | +28 11 55.1 | d m s |
| Right ascension (decimal) | 160.63071 | degrees |
| Declination (decimal) | 28.19864 | degrees |
| V-band apparent magnitude | 11.37 | mag |
| K-band apparent magnitude | 10.01 | mag |
| Transit duration | 0.21 ( 5.0 ) | day hour |
| Transit depth | 0.4 | % |
| Time of mid-transit | 2456885.1043 ± 0.0017 | HJD or BJD |
| Orbital period | 5.167228 ± 0.000003 | days |
| Reference for orbital ephemeris | 2025AJ....169..334S |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 6050 ± 100 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.0 ± 0.3 | dex |
| Stellar mass | 1.36 ± 0.08 | Msun |
| Stellar radius | 2.112 ± 0.077 | Rsun |
| Stellar logarithmic surface gravity | 3.9 ± 0.2 | c.g.s. |
| Stellar mean density | 0.204 ± 0.002 ( 0.2878 ± 0.0028 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.065 ± 0.002 | AU |
| Planetary mass | 1.27 ± 0.25 ( 403 ± 79 ) | Mjup Mearth |
| Planetary radius | 1.289 ± 0.049 ( 14.45 ± 0.55 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | 0.56 ± 0.14 ( 0.74 ± 0.19 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1665 ± 67 | K |
| Reference of detailed study | 2025AJ....169..334S |
WASP-197 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/08/27 John Southworth (Keele University, UK)