This page summarises the information held within TEPCat for the transiting system K2-258b. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2018AJ....156...78L | |
| Date of discovery paper | 2018 / 7 / 2 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 12 30 31.52 | h m s |
| Declination | −01 09 39.3 | d m s |
| Right ascension (decimal) | 187.63133 | degrees |
| Declination (decimal) | -1.16092 | degrees |
| V-band apparent magnitude | 13.06 | mag |
| K-band apparent magnitude | 11.78 | mag |
| Transit duration | 0.2485 ( 5.964 ) | day hour |
| Transit depth | 0.04 | % |
| Time of mid-transit | 2457586.29280 ± 0.01470 | HJD or BJD |
| Orbital period | 19.0921000 ± 0.0057600 | days |
| Reference for orbital ephemeris | 2018AJ....156...78L |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 6351 +198 −228 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | 0.01 +0.15 −0.17 | dex |
| Stellar mass | 1.210 +0.050 −0.080 | Msun |
| Stellar radius | 1.310 ± 0.030 | Rsun |
| Stellar logarithmic surface gravity | 4.290 +0.030 −0.040 | c.g.s. |
| Stellar mean density | 0.400 +0.100 −0.200 ( 0.56 +0.14 −0.28 ) | ρsun g cm-3 |
| Orbital eccentricity | ||
| Orbital semimajor axis | 0.14900 +0.00250 −0.00260 | AU |
| Planetary mass | Mjup Mearth | |
| Planetary radius | 0.268 +0.019 −0.018 ( 3.00 +0.21 −0.20 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 831 ± 30 | K |
| Reference of detailed study | 2018AJ....156...78L |
K2-258b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/08/27 John Southworth (Keele University, UK)