TEPCat: HD 189733


 

This page summarises the information held within TEPCat for the transiting planetary system HD 189733. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2005A+A...444L..15B  
Date of discovery paper 2005 / 9 / 29 y / m / d
Right ascension 20 00 43.71 h m s
Declination +22 42 39.1 d m s
V-band apparent magnitude 7.68 mag
K-band apparent magnitude 5.54 mag
Transit duration 0.07529
( 1.8070 )
day
hour
Transit depth 2.6 %
Time of mid-transit   2453955.525551 ± 0.000009     HJD or BJD
Orbital period 2.218575200 ± 0.000000077 days
Reference for orbital ephemeris   2015MNRAS.450.3101B  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5050 ± 50 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.03 ± 0.05 dex
Stellar mass 0.840 ± 0.042   Msun
Stellar radius 0.752 ± 0.025 Rsun
Stellar logarithmic surface gravity 4.610 ± 0.026 c.g.s.
Stellar mean density 1.980 ± 0.170
( 2.79 ± 0.24 )
ρsun
g cm-3
Orbital eccentricity 0.0041 +0.0025 −0.0020  
Orbital semimajor axis   0.03142 ± 0.00052  AU
Planetary mass 1.150 ± 0.039
( 365 ± 12 )
Mjup
Mearth
Planetary radius 1.151 ± 0.038
( 12.90 ± 0.43 )
Rjup
Rearth
Planetary surface gravity 21.5 ± 1.2
3.33 ± 0.02
m/s2
log(cgs)
Planetary mean density 0.75 ± 0.07
( 0.995 ± 0.093 )
ρjup
g cm-3
Planetary equilibrium temperature 1191 ± 20 K
Reference of detailed study 2010MNRAS.408.1689S  

 

Entries in the catalogue of Rossiter-McLaughlin measurements:
 
Reference λ (degrees)
Winn et al. (2006)   −1.4   ±   1.1  
Triaud et al. (2009)   0.85   + 0.28   - 0.32  
Collier Cameron et al. (2010)   −0.50   ±   0.30  
Dumusque (2014)   −999   ±   -999  
Cegla et al. (2016)   −0.4   ±   0.2  
Casasayas-Barris et al. (2017)   −0.31   + 0.18   - 0.17  

 

 

HD 189733 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same as the physical properties given above, but in some cases the Homogeneous Studies results given below have been superseded by newer analyses.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 200.56 ± 0.88 m/s
Stellar effective temperature 5050 ± 50 K
Stellar metal abundance ([Fe/H] or [M/H])   -0.03 ± 0.05 dex
Orbital inclination 85.78 ± 0.25   degrees
Fractional stellar radius (R* / a) 0.1113 ± 0.0031  
Fractional planetary radius (Rpl / a)   0.0175 ± 0.0005   
Light curve analysis reference 2008MNRAS.386.1644S  
 
Derived parameters Value Unit
Stellar mass 0.840 ± 0.030 ± 0.029 Msun
Stellar radius 0.752 ± 0.023 ± 0.009 Rsun
Stellar logarithmic surface gravity 4.610 ± 0.026 ± 0.005 c.g.s.
Stellar mean density 1.98 ± 0.17 ρsun
Orbital semimajor axis   0.03142 ± 0.00038 ± 0.00036  AU
Planetary mass 1.150 ± 0.028 ± 0.027 Mjup
Planetary radius 1.151 ± 0.036 ± 0.013 Rjup
Planetary surface gravity 21.5 ± 1.2 m/s2
Planetary mean density 0.706 ± 0.062 ± 0.008 ρjup
Planetary equilibrium temperature 1191 ± 20 K
Safronov number 0.0747 ± 0.0024 ± 0.0009  
Main analysis reference 2010MNRAS.408.1689S  

 


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