This page summarises the information held within TEPCat for the transiting planetary system WASP-20. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2015A+A...575A..61A | |
| Date of discovery paper | 2014 / 2 / 7 | y / m / d |
| Data/telescope used for discovery | WASP | |
| Right ascension | 00 20 38.53 | h m s |
| Declination | −23 56 08.6 | d m s |
| Right ascension (decimal) | 5.16054 | degrees |
| Declination (decimal) | -23.93572 | degrees |
| V-band apparent magnitude | 10.68 | mag |
| K-band apparent magnitude | 9.39 | mag |
| Transit duration | 0.1418 ( 3.403 ) | day hour |
| Transit depth | 1.2 | % |
| Time of mid-transit | 2455715.65562 ± 0.00029 | HJD or BJD |
| Orbital period | 4.8996284 ± 0.0000033 | days |
| Reference for orbital ephemeris | 2015A+A...575A..61A |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5987 ± 20 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.07 ± 0.02 | dex |
| Stellar mass | 1.113 ± 0.034 | Msun |
| Stellar radius | 1.242 ± 0.045 | Rsun |
| Stellar logarithmic surface gravity | 4.296 ± 0.030 | c.g.s. |
| Stellar mean density | 0.581 ± 0.060 ( 0.820 ± 0.085 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 +0.11 −0.0 | |
| Orbital semimajor axis | 0.05851 ± 0.00059 | AU |
| Planetary mass | 0.396 ± 0.046 ( 125 ± 14 ) | Mjup Mearth |
| Planetary radius | 1.382 ± 0.057 ( 15.49 ± 0.64 ) | Rjup Rearth |
| Planetary surface gravity | 5.13 ± 0.73 2.71 ± 0.06 | m/s2 log(cgs) |
| Planetary mean density | 0.140 ± 0.024 ( 0.186 ± 0.032 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1330 ± 25 | K |
| Reference of detailed study | 2020A+A...635A..74S |
| Reference | λ (degrees) |
|---|---|
| Anderson et al. (2015) | 12.7 ± 4.2 |
Page generated on 2025/03/17 John Southworth (Keele University, UK)