This page summarises the information held within TEPCat for the transiting planetary system WASP-33. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2010MNRAS.407..507C | |
| Date of discovery paper | 2010 / 4 / 26 | y / m / d |
| Data/telescope used for discovery | WASP | |
| Right ascension | 02 26 51.06 | h m s |
| Declination | +37 33 01.7 | d m s |
| Right ascension (decimal) | 36.71275 | degrees |
| Declination (decimal) | 37.55047 | degrees |
| V-band apparent magnitude | 8.18 | mag |
| K-band apparent magnitude | 7.47 | mag |
| Transit duration | 0.11880 ( 2.8512 ) | day hour |
| Transit depth | 1.4 | % |
| Time of mid-transit | 2458792.63403 ± 0.00009 | HJD or BJD |
| Orbital period | 1.219870527 ± 0.000000070 | days |
| Reference for orbital ephemeris | 2025MNRAS.537..171B |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 7430 ± 100 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.1 ± 0.2 | dex |
| Stellar mass | 1.561 +0.045 −0.079 | Msun |
| Stellar radius | 1.509 +0.019 −0.030 | Rsun |
| Stellar logarithmic surface gravity | 4.27 ± 0.01 | c.g.s. |
| Stellar mean density | 0.478 ± 0.008 ( 0.674 ± 0.011 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.02555 ± 0.00035 | AU |
| Planetary mass | 2.16 ± 0.20 ( 686 ± 63 ) | Mjup Mearth |
| Planetary radius | 1.665 ± 0.010 ( 18.66 ± 0.11 ) | Rjup Rearth |
| Planetary surface gravity | 19 ± 2 3.28 ± 0.04 | m/s2 log(cgs) |
| Planetary mean density | 0.48 ± 0.07 ( 0.637 ± 0.093 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 2710 ± 50 | K |
| Reference of detailed study | 2025MNRAS.537..171B |
| Reference | λ (degrees) |
|---|---|
| Collier Cameron et al. (2010) | 252 ± 2 |
| Johnson et al. (2015) 2008 data | −110.06 + 0.40 - 0.27 |
| Johnson et al. (2015) 2014 data | −112.93 + 0.23 - 0.22 |
| Iorio (2016) 2008 data | −999 ± -999 |
| Iorio (2016) 2014 data | −999 ± -999 |
| Watanabe et al. (2020) 2008 data | −111.28 + 0.47 - 0.48 |
| Watanabe et al. (2020) 2011 data | −114.01 + 0.22 - 0.20 |
| Watanabe et al. (2020) 2014 data | −112.91 ± 0.24 |
| Cauley et al. (2021) | −109.29 + 0.20 - 0.17 |
| Borsa et al. (2021) | −111.70 ± 0.39 |
| Watanabe et al. (2022) | −111.64 ± 0.28 |
| Kálmán et al. (2022) | −94.9 ± 21.4 |
| Smith et al. (2025) | -115.0 |
Page generated on 2025/03/24 John Southworth (Keele University, UK)