This page summarises the information held within TEPCat for the transiting planetary system WASP-2. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2007MNRAS.375..951C | |
| Date of discovery paper | 2006 / 9 / 22 | y / m / d |
| Data/telescope used for discovery | WASP | |
| Right ascension | 20 30 54.13 | h m s |
| Declination | +06 25 46.4 | d m s |
| Right ascension (decimal) | 307.72554 | degrees |
| Declination (decimal) | 6.42956 | degrees |
| V-band apparent magnitude | 11.98 | mag |
| K-band apparent magnitude | 9.63 | mag |
| Transit duration | 0.07372 ( 1.7693 ) | day hour |
| Transit depth | 2.0 | % |
| Time of mid-transit | 2456823.839482 ± 0.000062 | HJD or BJD |
| Orbital period | 2.15222214 ± 0.000000008 | days |
| Reference for orbital ephemeris | 2022MNRAS.512.2062B |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5170 ± 60 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.04 ± 0.05 | dex |
| Stellar mass | 0.843 ± 0.038 | Msun |
| Stellar radius | 0.821 ± 0.014 | Rsun |
| Stellar logarithmic surface gravity | 4.536 ± 0.015 | c.g.s. |
| Stellar mean density | 1.524 ± 0.067 ( 2.150 ± 0.095 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.0308 ± 0.0004 | AU |
| Planetary mass | 0.892 ± 0.030 ( 283.56 ± 9.54 ) | Mjup Mearth |
| Planetary radius | 1.060 ± 0.025 ( 11.88 ± 0.28 ) | Rjup Rearth |
| Planetary surface gravity | 19.70 ± 0.78 3.29 ± 0.02 | m/s2 log(cgs) |
| Planetary mean density | 0.701 ± 0.041 ( 0.930 ± 0.054 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1286 ± 17 | K |
| Reference of detailed study | 2020A+A...635A..74S |
| Reference | λ (degrees) |
|---|---|
| Triaud et al. (2010) | −153 + 15 - 11 |
| Albrecht et al. (2011) | indeterminate |
Page generated on 2025/01/01 John Southworth (Keele University, UK)