This page summarises the information held within TEPCat for the transiting planetary system WASP-178. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2019MNRAS.490.1479H | |
| Date of discovery paper | 2019 / 7 / 29 | y / m / d |
| Data/telescope used for discovery | WASP | |
| Right ascension | 15 09 04.89 | h m s |
| Declination | −42 42 17.8 | d m s |
| Right ascension (decimal) | 227.27038 | degrees |
| Declination (decimal) | -42.70494 | degrees |
| V-band apparent magnitude | 9.95 | mag |
| K-band apparent magnitude | 9.70 | mag |
| Transit duration | 0.1446 ( 3.470 ) | day hour |
| Transit depth | 1.2 | % |
| Time of mid-transit | 2459388.19728 ± 0.00011 | HJD or BJD |
| Orbital period | 3.3448371 ± 0.0000011 | days |
| Reference for orbital ephemeris | arXiv:2406.08348 |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 9200 +200 −170 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.02 ± 0.06 | dex |
| Stellar mass | 2.02 +0.04 −0.05 | Msun |
| Stellar radius | 1.70 ± 0.01 | Rsun |
| Stellar logarithmic surface gravity | 4.28 ± 0.01 | c.g.s. |
| Stellar mean density | 0.417 ± 0.003 ( 0.5884 ± 0.0042 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 +0.08 −0.0 | |
| Orbital semimajor axis | 0.0561 +0.0005 −0.0013 | AU |
| Planetary mass | 1.66 ± 0.12 ( 527 ± 38 ) | Mjup Mearth |
| Planetary radius | 1.77 ± 0.01 ( 19.84 ± 0.11 ) | Rjup Rearth |
| Planetary surface gravity | 13.2 ± 0.9 3.12 ± 0.03 | m/s2 log(cgs) |
| Planetary mean density | 0.476 ± 0.038 ( 0.631 ± 0.050 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 2470 ± 60 | K |
| Reference of detailed study | arXiv:2406.08348 |
| Reference | λ (degrees) |
|---|---|
| Damasceno et al. (2024) | 105.7 + 3.6 - 4.2 |
Page generated on 2025/08/27 John Southworth (Keele University, UK)