This page summarises the information held within TEPCat for the transiting brown dwarf system WASP-128. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2018MNRAS.481.5091H | |
| Date of discovery paper | 2018 / 7 / 20 | y / m / d |
| Data/telescope used for discovery | WASP | |
| Right ascension | 11 31 26.10 | h m s |
| Declination | −41 41 22.3 | d m s |
| Right ascension (decimal) | 172.85875 | degrees |
| Declination (decimal) | -41.68953 | degrees |
| V-band apparent magnitude | 12.37 | mag |
| K-band apparent magnitude | 10.94 | mag |
| Transit duration | 0.1129 ( 2.710 ) | day hour |
| Transit depth | 0.8 | % |
| Time of mid-transit | 2456720.68318 ± 0.00021 | HJD or BJD |
| Orbital period | 2.20883665 ± 0.00000045 | days |
| Reference for orbital ephemeris | 2018MNRAS.481.5091H |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 6081 ± 78 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.12 ± 0.09 | dex |
| Stellar mass | 1.21 ± 0.05 | Msun |
| Stellar radius | 1.18 ± 0.02 | Rsun |
| Stellar logarithmic surface gravity | 4.396 +0.008 −0.014 | c.g.s. |
| Stellar mean density | 0.807 +0.016 −0.038 ( 1.139 +0.023 −0.054 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 +0.007 −0.0 | |
| Orbital semimajor axis | 0.03590 +0.00038 −0.00040 | AU |
| Planetary mass | 39.3 ± 1.0 ( 124931 ± 3179 ) | Mjup Mearth |
| Planetary radius | 0.96 ± 0.02 ( 10.76 ± 0.22 ) | Rjup Rearth |
| Planetary surface gravity | 1096 +33 −44 5.04 +0.01 −0.02 | m/s2 log(cgs) |
| Planetary mean density | 41.0 +1.9 −2.6 ( 54.4 + 2.5 − 3.4 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | K | |
| Reference of detailed study | 2023MNRAS.519.5177C |
WASP-128 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/03/17 John Southworth (Keele University, UK)