TEPCat: KELT-18


 

This page summarises the information held within TEPCat for the transiting planetary system KELT-18. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2017AJ....153..263M  
Date of discovery paper 2017 / 2 / 7 y / m / d
Right ascension 14 26 05.78 h m s
Declination +59 26 39.2 d m s
V-band apparent magnitude 10.21 mag
K-band apparent magnitude 9.21 mag
Transit duration 0.1935
( 4.644 )
day
hour
Transit depth 0.85 %
Time of mid-transit   2457542.52504 ± 0.00039     HJD or BJD
Orbital period 2.8717518 ± 0.0000028 days
Reference for orbital ephemeris   2017AJ....153..263M  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6670 ± 120 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.09 ± 0.13 dex
Stellar mass 1.524 +0.069 −0.068   Msun
Stellar radius 1.908 +0.042 −0.035 Rsun
Stellar logarithmic surface gravity 4.060 +0.010 −0.014 c.g.s.
Stellar mean density 0.220 +0.005 −0.010
( 0.3104 +0.0071 −0.0141 )
ρsun
g cm-3
Orbital eccentricity 0.0 +0.27 −0.0  
Orbital semimajor axis   0.04550 +0.00067 −0.00069  AU
Planetary mass 1.18 ± 0.11
( 375 ± 34 )
Mjup
Mearth
Planetary radius 1.570 +0.042 −0.036
( 17.60 + 0.47 − 0.40 )
Rjup
Rearth
Planetary surface gravity 11.8 ± 1.1
3.07 ± 0.04
m/s2
log(cgs)
Planetary mean density 0.284 ± 0.030
( 0.377 ± 0.040 )
ρjup
g cm-3
Planetary equilibrium temperature 2085 +39 −38 K
Reference of detailed study 2017AJ....153..263M  

 

KELT-18 does not have an entry in the catalogue of Rossiter-McLaughlin measurements.

 

KELT-18 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2017/12/15           John Southworth   (Keele University, UK)