This page summarises the information held within TEPCat for the transiting system K2-197b. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2018AJ....156..277L | |
| Date of discovery paper | 2018 / 10 / 10 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 13 29 34.47 | h m s |
| Declination | −07 22 26.4 | d m s |
| Right ascension (decimal) | 202.39362 | degrees |
| Declination (decimal) | -7.37400 | degrees |
| V-band apparent magnitude | 11.83 | mag |
| K-band apparent magnitude | 10.48 | mag |
| Transit duration | 0.1428 ( 3.427 ) | day hour |
| Transit depth | 0.06 | % |
| Time of mid-transit | 2457218.18248 ± 0.00364 | HJD or BJD |
| Orbital period | 8.3578810 ± 0.0007100 | days |
| Reference for orbital ephemeris | 2018AJ....156..277L |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5667 ± 58 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | 0.08 ± 0.05 | dex |
| Stellar mass | 1.000 ± 0.020 | Msun |
| Stellar radius | 0.930 ± 0.010 | Rsun |
| Stellar logarithmic surface gravity | 4.500 ± 0.020 | c.g.s. |
| Stellar mean density | 0.825 +0.535 −0.370 ( 1.16 +0.75 −0.52 ) | ρsun g cm-3 |
| Orbital eccentricity | ||
| Orbital semimajor axis | 0.08060 +0.00060 −0.00070 | AU |
| Planetary mass | Mjup Mearth | |
| Planetary radius | 0.228 ± 0.014 ( 2.56 ± 0.16 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 848 ± 11 | K |
| Reference of detailed study | 2018AJ....156..277L |
K2-197b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/08/27 John Southworth (Keele University, UK)