This page summarises the information held within TEPCat for the transiting planetary system HAT-P-20. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2011ApJ...742..116B | |
| Date of discovery paper | 2010 / 8 / 23 | y / m / d |
| Data/telescope used for discovery | HAT | |
| Right ascension | 07 27 39.96 | h m s |
| Declination | +24 20 11.0 | d m s |
| Right ascension (decimal) | 111.91650 | degrees |
| Declination (decimal) | 24.33639 | degrees |
| V-band apparent magnitude | 11.34 | mag |
| K-band apparent magnitude | 8.60 | mag |
| Transit duration | 0.0770 ( 1.848 ) | day hour |
| Transit depth | 1.9 | % |
| Time of mid-transit | 2456670.97803 ± 0.00010 | HJD or BJD |
| Orbital period | 2.875317 ± 0.0000004 | days |
| Reference for orbital ephemeris | 2022ExA....53..547K |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 4595 ± 45 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.22 ± 0.09 | dex |
| Stellar mass | 0.748 ± 0.042 | Msun |
| Stellar radius | 0.680 ± 0.006 | Rsun |
| Stellar logarithmic surface gravity | 4.643 ± 0.020 | c.g.s. |
| Stellar mean density | 1.67 ± 0.11 ( 2.36 ± 0.16 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0172 ± 0.0016 | |
| Orbital semimajor axis | 0.03593 ± 0.00029 | AU |
| Planetary mass | 7.22 ± 0.36 ( 22952 ± 1144 ) | Mjup Mearth |
| Planetary radius | 1.025 ± 0.053 ( 11.49 ± 0.59 ) | Rjup Rearth |
| Planetary surface gravity | 170.2 +7.6 −7.3 4.23 +0.02 −0.02 | m/s2 log(cgs) |
| Planetary mean density | 6.26 ± 0.29 ( 8.30 ± 0.38 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 964 ± 10 | K |
| Reference of detailed study | 2017A+A...601A..53E |
| Reference | λ (degrees) |
|---|---|
| Esposito et al. (2017) | −8.0 ± 6.9 |
Page generated on 2024/09/10 John Southworth (Keele University, UK)