TEPCat: CoRoT-20


 

This page summarises the information held within TEPCat for the transiting planetary system CoRoT-20. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2012A+A...538A.145D  
Date of discovery paper 2011 / 9 / 16 y / m / d
Right ascension 06 30 52.90 h m s
Declination +00 13 36.9 d m s
V-band apparent magnitude 14.66 mag
K-band apparent magnitude 12.51 mag
Transit duration 0.0927
( 2.225 )
day
hour
Transit depth 0.9 %
Time of mid-transit   2455266.0016 ± 0.0010     HJD or BJD
Orbital period 9.243180 ± 0.000009 days
Reference for orbital ephemeris   arXiv:1812.01536  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5880 ± 90 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.14 ± 0.12 dex
Stellar mass 1.10 ± 0.10   Msun
Stellar radius 1.16 +0.15 −0.20 Rsun
Stellar logarithmic surface gravity 4.35 +0.11 −0.14 c.g.s.
Stellar mean density 0.71 +0.26 −0.35
( 1.00 +0.37 −0.49 )
ρsun
g cm-3
Orbital eccentricity 0.59 ± 0.02  
Orbital semimajor axis   0.0891 ± 0.0038  AU
Planetary mass 4.14 +0.36 −0.30
( 1316 +114 −95 )
Mjup
Mearth
Planetary radius 1.00 +0.18 −0.21
( 11.2 + 2.0 − 2.4 )
Rjup
Rearth
Planetary surface gravity 102 +42 −35
4.0 +0.1 −0.2
m/s2
log(cgs)
Planetary mean density 3.9 +2.1 −2.4
( 5.2 +2.8 −3.2 )
ρjup
g cm-3
Planetary equilibrium temperature 1024 ± 16 K
Reference of detailed study arXiv:1812.01536  

 

CoRoT-20 does not have an entry in the catalogue of orbital obliquity measurements.

 

CoRoT-20 has been examined as part of the Homogeneous Studies of Transiting Extrasolar Planets project. The details from this work have been given below. In most instances they are the same as the physical properties given above, but in some cases the Homogeneous Studies results given below have been superseded by newer analyses. Separate statistical and systematic errorbars are given where relevant.

Measured parameters Value Unit
Orbital velocity amplitude 454 ± 9 m/s
Stellar effective temperature 5880 ± 90 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.14 ± 0.12 dex
Orbital inclination 83.5 ± 3.8   degrees
Fractional stellar radius (R* / a) 0.070 ± 0.019  
Fractional planetary radius (Rpl / a)   0.0062 ± 0.0014   
Light curve analysis reference 2012MNRAS.426.1291S  
 
Derived parameters Value Unit
Stellar mass 1.11 ± 0.10 ± 0.01 Msun
Stellar radius 1.34 ± 0.37 ± 0.01 Rsun
Stellar logarithmic surface gravity 4.23 ± 0.24 ± 0.00 c.g.s.
Stellar mean density 0.46 ± 0.48 ρsun
Orbital semimajor axis   0.0892 ± 0.0028 ± 0.0004  AU
Planetary mass 5.06 ± 0.36 ± 0.04 Mjup
Planetary radius 1.16 ± 0.26 ± 0.00 Rjup
Planetary surface gravity 93 ± 46 m/s2
Planetary mean density 3.0 ± 2.5 ± 0.0 ρjup
Planetary equilibrium temperature 1100 ± 150 K
Safronov number 0.70 ± 0.17 ± 0.00  
Main analysis reference 2012MNRAS.426.1291S  

 


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