TEPCat: KELT-20


 

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.

 

Discovery and basic observable quantities:
 
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  

 

Physical properties from the most recent detailed study:
 
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  

 

Entries in the catalogue of orbital obliquity measurements:
 
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 2024/04/19           John Southworth   (Keele University, UK)