TEPCat: Qatar-4


 

This page summarises the information held within TEPCat for the transiting planetary system Qatar-4. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2017AJ....153..200A  
Date of discovery paper 2017 / 4 / 10 y / m / d
Right ascension 00 19 26.22 h m s
Declination +44 01 39.4 d m s
V-band apparent magnitude 13.60 mag
K-band apparent magnitude 11.52 mag
Transit duration 0.0891
( 2.138 )
day
hour
Transit depth 2.1 %
Time of mid-transit   2457637.77361 ± 0.00046     HJD or BJD
Orbital period 1.80536 ± 0.00096 days
Reference for orbital ephemeris   2017AJ....153..200A  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5218 ± 50 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.10 ± 0.08 dex
Stellar mass 0.896 ± 0.048   Msun
Stellar radius 0.849 ± 0.063 Rsun
Stellar logarithmic surface gravity 4.533 ± 0.058 c.g.s.
Stellar mean density 1.467 ± 0.027
( 2.070 ± 0.038 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.02803 ± 0.00048  AU
Planetary mass 6.10 ± 0.54
( 19391 ± 1717 )
Mjup
Mearth
Planetary radius 1.135 ± 0.11
( 12.7 ± 1.2 )
Rjup
Rearth
Planetary surface gravity 117 +23 −19
4.07 +0.08 −0.08
m/s2
log(cgs)
Planetary mean density 3.8 ± 0.8
( 5.0 ± 1.1 )
ρjup
g cm-3
Planetary equilibrium temperature 1385 ± 48 K
Reference of detailed study 2017AJ....153..200A  

 

Qatar-4 does not have an entry in the catalogue of Rossiter-McLaughlin measurements.

 

Qatar-4 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


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