This page summarises the information held within TEPCat for the transiting planetary system K2-238. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2018MNRAS.478.5356S | |
| Date of discovery paper | 2018 / 1 / 25 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 23 10 49.04 | h m s |
| Declination | −07 51 27.0 | d m s |
| Right ascension (decimal) | 347.70433 | degrees |
| Declination (decimal) | -7.85750 | degrees |
| V-band apparent magnitude | 13.75 | mag |
| K-band apparent magnitude | 12.03 | mag |
| Transit duration | 0.16 ( 3.8 ) | day hour |
| Transit depth | 0.7 | % |
| Time of mid-transit | 2457740.5036 ± 0.0004 | HJD or BJD |
| Orbital period | 3.20466 ± 0.00003 | days |
| Reference for orbital ephemeris | 2018MNRAS.478.5356S |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5630 ± 78 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.34 ± 0.04 | dex |
| Stellar mass | 1.19 ± 0.08 | Msun |
| Stellar radius | 1.59 ± 0.16 | Rsun |
| Stellar logarithmic surface gravity | 4.11 ± 0.07 | c.g.s. |
| Stellar mean density | 0.0550 +0.0003 −0.0002 ( 0.07761 +0.00042 −0.00028 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.046 +0.007 −0.006 | AU |
| Planetary mass | 0.86 +0.13 −0.12 ( 273 +41 −38 ) | Mjup Mearth |
| Planetary radius | 1.30 +0.15 −0.14 ( 14.6 + 1.7 − 1.6 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | 0.42 +0.19 −0.12 ( 0.56 +0.25 −0.16 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1587 +75 −76 | K |
| Reference of detailed study | 2018MNRAS.478.5356S |
K2-238 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/03/24 John Southworth (Keele University, UK)