This page summarises the information held within TEPCat for the transiting planetary system Kepler-138b. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2014ApJ...784...45R | |
| Date of discovery paper | 2014 / 1 / 7 | y / m / d |
| Data/telescope used for discovery | Kepler | |
| Right ascension | 19 21 31.56 | h m s |
| Declination | +43 17 34.8 | d m s |
| Right ascension (decimal) | 290.38150 | degrees |
| Declination (decimal) | 43.29300 | degrees |
| V-band apparent magnitude | 13.34 | mag |
| K-band apparent magnitude | 9.51 | mag |
| Transit duration | 0.10 ( 2.4 ) | day hour |
| Transit depth | 0.03 | % |
| Time of mid-transit | 2454956.236 ± 0.003 | HJD or BJD |
| Orbital period | 10.3134 ± 0.0003 | days |
| Reference for orbital ephemeris | 2023NatAs...7..206P |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 3841 +50 −51 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.18 ± 0.10 | dex |
| Stellar mass | 0.535 ± 0.012 | Msun |
| Stellar radius | 0.535 +0.013 −0.014 | Rsun |
| Stellar logarithmic surface gravity | 4.71 ± 0.03 | c.g.s. |
| Stellar mean density | 3.5 ± 0.3 ( 4.94 ± 0.42 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.020 ± 0.009 | |
| Orbital semimajor axis | 0.0753 ± 0.0006 | AU |
| Planetary mass | 0.0002 ± 0.0001 ( 0.064 ± 0.032 ) | Mjup Mearth |
| Planetary radius | 0.0571 ± 0.0018 ( 0.640 ± 0.020 ) | Rjup Rearth |
| Planetary surface gravity | 1.91 +0.55 −0.53 2.3 +0.1 −0.1 | m/s2 log(cgs) |
| Planetary mean density | 1.3 ± 0.4 ( 1.72 ± 0.53 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 452 +8 −9 | K |
| Reference of detailed study | 2023NatAs...7..206P |
Kepler-138b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2024/09/10 John Southworth (Keele University, UK)