This page summarises the information held within TEPCat for the transiting system K2-254b. 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 22 12.18 | h m s |
| Declination | −04 43 02.0 | d m s |
| Right ascension (decimal) | 185.55075 | degrees |
| Declination (decimal) | -4.71722 | degrees |
| V-band apparent magnitude | 13.45 | mag |
| K-band apparent magnitude | 11.30 | mag |
| Transit duration | 0.0907 ( 2.177 ) | day hour |
| Transit depth | 0.05 | % |
| Time of mid-transit | 2457582.97570 ± 0.00960 | HJD or BJD |
| Orbital period | 4.0963900 ± 0.0008100 | days |
| Reference for orbital ephemeris | 2018AJ....156...78L |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 4629 +168 −123 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.14 +0.18 −0.15 | dex |
| Stellar mass | 0.710 +0.020 −0.030 | Msun |
| Stellar radius | 0.670 ± 0.010 | Rsun |
| Stellar logarithmic surface gravity | 4.640 ± 0.010 | c.g.s. |
| Stellar mean density | 3.200 ± 0.400 ( 4.52 ± 0.56 ) | ρsun g cm-3 |
| Orbital eccentricity | ||
| Orbital semimajor axis | 0.04480 ± 0.00050 | AU |
| Planetary mass | Mjup Mearth | |
| Planetary radius | 0.145 +0.025 −0.021 ( 1.63 +0.28 −0.24 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 791 ± 26 | K |
| Reference of detailed study | 2018AJ....156...78L |
K2-254b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/08/27 John Southworth (Keele University, UK)