This page summarises the information held within TEPCat for the transiting planetary system WASP-4. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2008ApJ...675L.113W | |
| Date of discovery paper | 2007 / 11 / 22 | y / m / d |
| Data/telescope used for discovery | WASP | |
| Right ascension | 23 34 15.06 | h m s |
| Declination | −42 03 41.1 | d m s |
| Right ascension (decimal) | 353.56275 | degrees |
| Declination (decimal) | -42.06142 | degrees |
| V-band apparent magnitude | 12.46 | mag |
| K-band apparent magnitude | 10.75 | mag |
| Transit duration | 0.08994 ( 2.1586 ) | day hour |
| Transit depth | 2.9 | % |
| Time of mid-transit | 2456505.748953 ± 0.000020 | HJD or BJD |
| Orbital period | 1.338231429 ± 0.000000020 | days |
| Reference for orbital ephemeris | 2019MNRAS.490.4230S |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5540 ± 55 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.03 ± 0.09 | dex |
| Stellar mass | 0.927 ± 0.055 | Msun |
| Stellar radius | 0.910 ± 0.018 | Rsun |
| Stellar logarithmic surface gravity | 4.487 ± 0.010 | c.g.s. |
| Stellar mean density | 1.230 ± 0.022 ( 1.736 ± 0.031 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.02318 ± 0.00046 | AU |
| Planetary mass | 1.249 ± 0.052 ( 397 ± 16 ) | Mjup Mearth |
| Planetary radius | 1.364 ± 0.028 ( 15.29 ± 0.31 ) | Rjup Rearth |
| Planetary surface gravity | 16.64 ± 0.33 3.221 ± 0.009 | m/s2 log(cgs) |
| Planetary mean density | 0.460 ± 0.015 ( 0.610 ± 0.020 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1673 ± 17 | K |
| Reference of detailed study | 2012MNRAS.426.1291S |
| Reference | λ (degrees) |
|---|---|
| Triaud et al. (2010) | 4 + 34 - 43 |
| Sanchis-Ojeda et al. (2011) | −1 + 14 - 12 |
Page generated on 2025/03/17 John Southworth (Keele University, UK)