This page summarises the information held within TEPCat for the transiting system K2-188b. 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 | 08 39 15.27 | h m s |
| Declination | +23 21 26.9 | d m s |
| Right ascension (decimal) | 129.81363 | degrees |
| Declination (decimal) | 23.35747 | degrees |
| V-band apparent magnitude | 12.56 | mag |
| K-band apparent magnitude | 11.15 | mag |
| Transit duration | 0.1062 ( 2.549 ) | day hour |
| Transit depth | 0.01 | % |
| Time of mid-transit | 2457140.47617 ± 0.00719 | HJD or BJD |
| Orbital period | 1.7421690 ± 0.0004570 | days |
| Reference for orbital ephemeris | 2018AJ....156..277L |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5977 ± 87 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.01 ± 0.05 | dex |
| Stellar mass | 1.060 ± 0.030 | Msun |
| Stellar radius | 1.190 ± 0.030 | Rsun |
| Stellar logarithmic surface gravity | 4.310 ± 0.030 | c.g.s. |
| Stellar mean density | 0.451 +0.304 −0.210 ( 0.64 +0.43 −0.30 ) | ρsun g cm-3 |
| Orbital eccentricity | ||
| Orbital semimajor axis | 0.02890 ± 0.00030 | AU |
| Planetary mass | Mjup Mearth | |
| Planetary radius | 0.120 ± 0.010 ( 1.35 ± 0.11 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 1692 +33 −32 | K |
| Reference of detailed study | 2018AJ....156..277L |
K2-188b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/08/27 John Southworth (Keele University, UK)