TEPCat: KELT-9


 

This page summarises the information held within TEPCat for the transiting planetary system KELT-9. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2017Natur.546..514G  
Date of discovery paper 2017 / 6 / 6 y / m / d
Right ascension 20 31 26.35 h m s
Declination +39 56 19.8 d m s
V-band apparent magnitude 7.56 mag
K-band apparent magnitude 7.48 mag
Transit duration 0.16361
( 3.9266 )
day
hour
Transit depth 0.68 %
Time of mid-transit   2457095.68572 ± 0.00014     HJD or BJD
Orbital period 1.4811235 ± 0.0000011 days
Reference for orbital ephemeris   2017Natur.546..514G  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 10170 ± 450 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.03 ± 0.20 dex
Stellar mass 2.52 +0.20 −0.25   Msun
Stellar radius 2.362 +0.075 −0.083 Rsun
Stellar logarithmic surface gravity 4.093 ± 0.014 c.g.s.
Stellar mean density 0.1915 ± 0.0021
( 0.2702 ± 0.0030 )
ρsun
g cm-3
Orbital eccentricity 0.0 +0.035 −0.0  
Orbital semimajor axis   0.03462 +0.00110 −0.00093  AU
Planetary mass 2.88 ± 0.84
( 915 ± 267 )
Mjup
Mearth
Planetary radius 1.891 +0.061 −0.053
( 21.20 + 0.68 − 0.59 )
Rjup
Rearth
Planetary surface gravity 20.0 ± 5.8
3.3 ± 0.1
m/s2
log(cgs)
Planetary mean density 0.40 ± 0.11
( 0.53 ± 0.15 )
ρjup
g cm-3
Planetary equilibrium temperature 4050 ± 180 K
Reference of detailed study 2017Natur.546..514G  

 

Entries in the catalogue of Rossiter-McLaughlin measurements:
 
Reference λ (degrees)
Gaudi et al. (2017)   −84.8   ±   1.4  

 

 

KELT-9 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)