TEPCat: Qatar-8


 

This page summarises the information held within TEPCat for the transiting planetary system Qatar-8. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2019AJ....157..224A  
Date of discovery paper 2019 / 3 / 25 y / m / d
Right ascension 10 29 38.96 h m s
Declination +70 31 37.5 d m s
V-band apparent magnitude 11.53 mag
K-band apparent magnitude 9.94 mag
Transit duration 0.1678
( 4.027 )
day
hour
Transit depth 1.1 %
Time of mid-transit   2458210.83980 ± 0.00085     HJD or BJD
Orbital period 3.71495 ± 0.00010 days
Reference for orbital ephemeris   2019AJ....157..224A  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5738 ± 51 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.025 ± 0.071 dex
Stellar mass 1.029 ± 0.051   Msun
Stellar radius 1.315 ± 0.020 Rsun
Stellar logarithmic surface gravity 4.214 ± 0.016 c.g.s.
Stellar mean density 0.454 ± 0.017
( 0.641 ± 0.024 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.0474 ± 0.0008  AU
Planetary mass 0.371 ± 0.062
( 117 ± 19 )
Mjup
Mearth
Planetary radius 1.285 ± 0.022
( 14.40 ± 0.25 )
Rjup
Rearth
Planetary surface gravity 5.6 +1.1 −0.9
2.75 +0.08 −0.08
m/s2
log(cgs)
Planetary mean density 0.163 ± 0.028
( 0.216 ± 0.037 )
ρjup
g cm-3
Planetary equilibrium temperature 1457 ± 14 K
Reference of detailed study 2019AJ....157..224A  

 

Qatar-8 does not have an entry in the catalogue of orbital obliquity measurements.

 

Qatar-8 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2019/07/16           John Southworth   (Keele University, UK)