This page summarises the information held within TEPCat for the transiting planetary system WASP-121. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2016MNRAS.458.4025D | |
| Date of discovery paper | 2015 / 6 / 9 | y / m / d |
| Data/telescope used for discovery | WASP | |
| Right ascension | 07 10 24.06 | h m s |
| Declination | −39 05 50.6 | d m s |
| Right ascension (decimal) | 107.60025 | degrees |
| Declination (decimal) | -39.09739 | degrees |
| V-band apparent magnitude | 10.52 | mag |
| K-band apparent magnitude | 9.37 | mag |
| Transit duration | 0.1211 ( 2.906 ) | day hour |
| Transit depth | 1.7 | % |
| Time of mid-transit | 2456635.70841 ± 0.00014 | HJD or BJD |
| Orbital period | 1.27492471 ± 0.00000008 | days |
| Reference for orbital ephemeris | 2022AcA....72....1M |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 6586 ± 59 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.13 ± 0.04 | dex |
| Stellar mass | 1.38 ± 0.02 | Msun |
| Stellar radius | 1.44 ± 0.03 | Rsun |
| Stellar logarithmic surface gravity | 4.47 ± 0.08 | c.g.s. |
| Stellar mean density | 0.437 +0.008 −0.009 ( 0.617 +0.011 −0.013 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 +0.07 −0.0 | |
| Orbital semimajor axis | 0.02544 +0.00049 −0.00050 | AU |
| Planetary mass | 1.183 +0.064 −0.062 ( 376 +20 −19 ) | Mjup Mearth |
| Planetary radius | 1.865 ± 0.044 ( 20.90 ± 0.49 ) | Rjup Rearth |
| Planetary surface gravity | 9.40 ± 0.37 2.97 ± 0.02 | m/s2 log(cgs) |
| Planetary mean density | 0.183 ± 0.016 ( 0.243 ± 0.021 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 2358 ± 52 | K |
| Reference of detailed study | 2021A+A...645A..24B |
| Reference | λ (degrees) |
|---|---|
| Delrez et al. (2015) | −257.8 + 5.5 - 5.3 |
| Bourrier et al. (2020) | 87.20 + 0.41 - 0.45 |
| Borsa et al. (2020) | −87.08 + 0.29 - 0.27 |
Page generated on 2023/09/01 John Southworth (Keele University, UK)