This page summarises the information held within TEPCat for the transiting planetary system WASP-42. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2012A+A...544A..72L | |
| Date of discovery paper | 2012 / 5 / 15 | y / m / d |
| Data/telescope used for discovery | WASP | |
| Right ascension | 12 51 55.62 | h m s |
| Declination | −42 04 25.2 | d m s |
| Right ascension (decimal) | 192.98175 | degrees |
| Declination (decimal) | -42.07367 | degrees |
| V-band apparent magnitude | 12.57 | mag |
| K-band apparent magnitude | 10.03 | mag |
| Transit duration | 0.12043 ( 2.8903 ) | day hour |
| Transit depth | 2.0 | % |
| Time of mid-transit | 2455650.56728 ± 0.00015 | HJD or BJD |
| Orbital period | 4.9816819 ± 0.0000011 | days |
| Reference for orbital ephemeris | 2016MNRAS.457.4205S |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5315 ± 79 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.29 ± 0.05 | dex |
| Stellar mass | 0.951 ± 0.063 | Msun |
| Stellar radius | 0.892 ± 0.021 | Rsun |
| Stellar logarithmic surface gravity | 4.515 ± 0.023 | c.g.s. |
| Stellar mean density | 1.338 ± 0.092 ( 1.89 ± 0.13 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.060 ± 0.013 | |
| Orbital semimajor axis | 0.0561 ± 0.0012 | AU |
| Planetary mass | 0.527 ± 0.028 ( 167.53 ± 8.90 ) | Mjup Mearth |
| Planetary radius | 1.122 ± 0.039 ( 12.58 ± 0.44 ) | Rjup Rearth |
| Planetary surface gravity | 10.38 ± 0.61 3.02 ± 0.02 | m/s2 log(cgs) |
| Planetary mean density | 0.349 ± 0.030 ( 0.463 ± 0.040 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1021 ± 19 | K |
| Reference of detailed study | 2016MNRAS.457.4205S |
WASP-42 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/03/17 John Southworth (Keele University, UK)