TEPCat: TrES-2


 

This page summarises the information held within TEPCat for the transiting planetary system TrES-2. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2006ApJ...651L..61O  
Date of discovery paper 2006 / 8 / 21 y / m / d
Right ascension 19 07 14.04 h m s
Declination +49 18 59.0 d m s
V-band apparent magnitude 11.41 mag
K-band apparent magnitude 9.85 mag
Transit duration 0.07451
( 1.7882 )
day
hour
Transit depth 1.5 %
Time of mid-transit   2453957.635499 ± 0.000013     HJD or BJD
Orbital period 2.470613374 ± 0.00000019 days
Reference for orbital ephemeris   2014MNRAS.444.1351R  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5850 ± 50 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.15 ± 0.10 dex
Stellar mass 0.991 ± 0.057   Msun
Stellar radius 0.964 ± 0.018 Rsun
Stellar logarithmic surface gravity 4.466 ± 0.009 c.g.s.
Stellar mean density 1.105 ± 0.011
( 1.559 ± 0.016 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.03567 ± 0.00067  AU
Planetary mass 1.206 ± 0.049
( 383 ± 15 )
Mjup
Mearth
Planetary radius 1.193 ± 0.023
( 13.37 ± 0.26 )
Rjup
Rearth
Planetary surface gravity 21.02 ± 0.31
3.323 ± 0.006
m/s2
log(cgs)
Planetary mean density 0.665 ± 0.015
( 0.882 ± 0.020 )
ρjup
g cm-3
Planetary equilibrium temperature 1466 ± 12 K
Reference of detailed study 2011MNRAS.417.2166S  

 

Entries in the catalogue of Rossiter-McLaughlin measurements:
 
Reference λ (degrees)
Winn et al. (2008)   −9   ±   12  

 

 

TrES-2 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same as the physical properties given above, but in some cases the Homogeneous Studies results given below have been superseded by newer analyses.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 181.3 ± 2.6 m/s
Stellar effective temperature 5850 ± 50 K
Stellar metal abundance ([Fe/H] or [M/H])   -0.15 ± 0.10 dex
Orbital inclination 83.925 ± 0.030   degrees
Fractional stellar radius (R* / a) 0.12568 ± 0.00041  
Fractional planetary radius (Rpl / a)   0.015979 ± 0.000027   
Light curve analysis reference 2011MNRAS.417.2166S  
 
Derived parameters Value Unit
Stellar mass 0.991 ± 0.052 ± 0.024 Msun
Stellar radius 0.964 ± 0.017 ± 0.008 Rsun
Stellar logarithmic surface gravity 4.466 ± 0.008 ± 0.004 c.g.s.
Stellar mean density 1.105 ± 0.011 ρsun
Orbital semimajor axis   0.03567 ± 0.00061 ± 0.00029  AU
Planetary mass 1.206 ± 0.045 ± 0.020 Mjup
Planetary radius 1.193 ± 0.021 ± 0.010 Rjup
Planetary surface gravity 21.02 ± 0.31 m/s2
Planetary mean density 0.665 ± 0.015 ± 0.005 ρjup
Planetary equilibrium temperature 1466 ± 12 K
Safronov number 0.0727 ± 0.0017 ± 0.0006  
Main analysis reference 2011MNRAS.417.2166S  

 


Page generated on 2017/12/11           John Southworth   (Keele University, UK)