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
Right ascension 19 38 38.73 h m s
Declination +31 13 09.2 d m s
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   2457503.12005 ± 0.00019     HJD or BJD
Orbital period 3.4741070 ± 0.0000019 days
Reference for orbital ephemeris   2017AJ....154..194L  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 8730 +250 −260 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 0.457 ± 0.025
( 0.645 ± 0.035 )
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 2017AJ....154..194L  

 

Entries in the catalogue of Rossiter-McLaughlin measurements:
 
Reference λ (degrees)
Lund et al. (2017)   3.4   ±   2.1  
Talens et al. (2017)   0.6   ±   4  

 

 

KELT-20 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2017/12/11           John Southworth   (Keele University, UK)