This page summarises the information held within TEPCat for the transiting planetary system K2-198b. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2018AJ....155..136M | |
| Date of discovery paper | 2018 / 2 / 15 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 13 15 22.54 | h m s |
| Declination | −06 27 53.6 | d m s |
| Right ascension (decimal) | 198.84392 | degrees |
| Declination (decimal) | -6.46489 | degrees |
| V-band apparent magnitude | 10.97 | mag |
| K-band apparent magnitude | 9.23 | mag |
| Transit duration | 0.17 ( 4.1 ) | day hour |
| Transit depth | 0.28 | % |
| Time of mid-transit | 2457204.5687 ± 0.0014 | HJD or BJD |
| Orbital period | 17.0428683 ± 0.0000053 | days |
| Reference for orbital ephemeris | 2019ApJ...880L...5H |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5213 +99 −49 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | dex | |
| Stellar mass | 0.799 +0.091 −0.045 | Msun |
| Stellar radius | 0.757 +0.035 −0.016 | Rsun |
| Stellar logarithmic surface gravity | c.g.s. | |
| Stellar mean density | ρsun g cm-3 | |
| Orbital eccentricity | ||
| Orbital semimajor axis | AU | |
| Planetary mass | Mjup Mearth | |
| Planetary radius | 0.374 +0.020 −0.009 ( 4.19 +0.22 −0.10 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 716 +19 −9 | K |
| Reference of detailed study | 2019ApJ...880L...5H |
K2-198b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/01/01 John Southworth (Keele University, UK)