This page summarises the information held within TEPCat for the transiting planetary system K2-139. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2018MNRAS.475.1765B | |
| Date of discovery paper | 2017 / 2 / 3 | y / m / d |
| Right ascension | 19 16 15.97 | h m s |
| Declination | −17 54 38.5 | d m s |
| V-band apparent magnitude | 11.65 | mag |
| K-band apparent magnitude | 9.66 | mag |
| Transit duration | 0.204 ( 4.90 ) | day hour |
| Transit depth | 1.1 | % |
| Time of mid-transit | 2457325.81714 ± 0.00033 | HJD or BJD |
| Orbital period | 28.38236 ± 0.00026 | days |
| Reference for orbital ephemeris | 2018MNRAS.475.1765B |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5340 ± 110 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.22 ± 0.08 | dex |
| Stellar mass | 0.919 ± 0.033 | Msun |
| Stellar radius | 0.862 ± 0.032 | Rsun |
| Stellar logarithmic surface gravity | 4.50 ± 0.09 | c.g.s. |
| Stellar mean density | 1.43 +0.18 −0.16 ( 2.02 +0.25 −0.23 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.12 +0.12 −0.08 | |
| Orbital semimajor axis | 0.179 +0.029 −0.027 | AU |
| Planetary mass | 0.387 +0.083 −0.075 ( 123 +26 −23 ) | Mjup Mearth |
| Planetary radius | 0.808 +0.034 −0.033 ( 9.06 +0.38 −0.37 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | 0.69 +0.18 −0.15 ( 0.92 +0.24 −0.20 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 565 +48 −32 | K |
| Reference of detailed study | 2018MNRAS.475.1765B |
K2-139 does not have an entry in the catalogue of orbital obliquity measurements.
K2-139 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.
Page generated on 2021/01/04 John Southworth (Keele University, UK)