This page summarises the information held within TEPCat for the transiting planetary system WASP-138. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2017A+A...599A...3L | |
| Date of discovery paper | 2016 / 7 / 27 | y / m / d |
| Data/telescope used for discovery | WASP | |
| Right ascension | 02 46 33.37 | h m s |
| Declination | −00 27 50.0 | d m s |
| Right ascension (decimal) | 41.63904 | degrees |
| Declination (decimal) | -0.46389 | degrees |
| V-band apparent magnitude | 11.81 | mag |
| K-band apparent magnitude | 10.49 | mag |
| Transit duration | 0.1572 ( 3.773 ) | day hour |
| Transit depth | 0.7 | % |
| Time of mid-transit | 2457326.62183 ± 0.00032 | HJD or BJD |
| Orbital period | 3.634433 ± 0.000005 | days |
| Reference for orbital ephemeris | 2017A+A...599A...3L |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 6300 ± 100 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.09 ± 0.10 | dex |
| Stellar mass | 1.22 ± 0.05 | Msun |
| Stellar radius | 1.36 ± 0.05 | Rsun |
| Stellar logarithmic surface gravity | 4.25 ± 0.02 | c.g.s. |
| Stellar mean density | 0.488 ± 0.044 ( 0.689 ± 0.062 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.0494 ± 0.0007 | AU |
| Planetary mass | 1.22 ± 0.08 ( 387 ± 25 ) | Mjup Mearth |
| Planetary radius | 1.09 ± 0.05 ( 12.22 ± 0.56 ) | Rjup Rearth |
| Planetary surface gravity | 22.9 +2.2 −2.0 3.36 +0.04 −0.04 | m/s2 log(cgs) |
| Planetary mean density | 0.92 +0.097 −0.146 ( 1.22 +0.13 −0.19 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1590 ± 31 | K |
| Reference of detailed study | 2017A+A...599A...3L |
WASP-138 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/03/17 John Southworth (Keele University, UK)