This page summarises the information held within TEPCat for the transiting planetary system KELT-20. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2017AJ....154..194L | |
| Date of discovery paper | 2017 / 7 / 7 | y / m / d |
| Data/telescope used for discovery | KELT | |
| Right ascension | 19 38 38.73 | h m s |
| Declination | +31 13 09.2 | d m s |
| Right ascension (decimal) | 294.66137 | degrees |
| Declination (decimal) | 31.21922 | degrees |
| V-band apparent magnitude | 7.59 | mag |
| K-band apparent magnitude | 7.42 | mag |
| Transit duration | 0.12897 ( 3.0953 ) | day hour |
| Transit depth | 1.3 | % |
| Time of mid-transit | 2458312.5853 ± 0.0002 | HJD or BJD |
| Orbital period | 3.47410075 ± 0.00000056 | days |
| Reference for orbital ephemeris | 2024A+A...683A...1S |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 8652 ± 160 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.29 +0.22 −0.36 | dex |
| Stellar mass | 1.76 +0.14 −0.20 | Msun |
| Stellar radius | 1.561 +0.058 −0.064 | Rsun |
| Stellar logarithmic surface gravity | 4.292 +0.017 −0.020 | c.g.s. |
| Stellar mean density | 0.4901 +0.0043 −0.0044 ( 0.6915 +0.0061 −0.0062 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.0542 +0.0014 −0.0021 | AU |
| Planetary mass | 0.0 +3.5 −0.0 ( 0 +1112 −0 ) | Mjup Mearth |
| Planetary radius | 1.735 +0.070 −0.075 ( 19.45 + 0.78 − 0.84 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 2261 ± 73 | K |
| Reference of detailed study | 2024A+A...683A...1S |
| Reference | λ (degrees) |
|---|---|
| Lund et al. (2017) | 3.4 ± 2.1 |
| Talens et al. (2018) | 0.6 ± 4 |
| Hoeijmakers et al. (2020) | 1.6 ± 3.1 |
| Singh et al. (2024) | 3.9 ± 1.1 |
Page generated on 2025/03/17 John Southworth (Keele University, UK)