TEPCat: HD 17156


 

This page summarises the information held within TEPCat for the transiting planetary system HD 17156. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2007A+A...476L..13B  
Date of discovery paper 2007 / 10 / 4 y / m / d
Right ascension 02 49 44.49 h m s
Declination +71 45 11.6 d m s
V-band apparent magnitude 8.17 mag
K-band apparent magnitude 6.76 mag
Transit duration 0.13098
( 3.1435 )
day
hour
Transit depth 0.6 %
Time of mid-transit   2454884.028170 ± 0.000073     HJD or BJD
Orbital period 21.2163979 ± 0.0000159 days
Reference for orbital ephemeris   2011ApJ...726....3N  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6079 ± 56 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.24 ± 0.05 dex
Stellar mass 1.297 ± 0.070   Msun
Stellar radius 1.487 ± 0.042 Rsun
Stellar logarithmic surface gravity 4.207 ± 0.018 c.g.s.
Stellar mean density 0.395 ± 0.022
( 0.557 ± 0.031 )
ρsun
g cm-3
Orbital eccentricity 0.6753 ± 0.0036  
Orbital semimajor axis   0.1637 ± 0.0029  AU
Planetary mass 3.262 ± 0.113
( 1036 ± 35 )
Mjup
Mearth
Planetary radius 1.065 ± 0.035
( 11.94 ± 0.39 )
Rjup
Rearth
Planetary surface gravity 71.2 ± 3.7
3.85 ± 0.02
m/s2
log(cgs)
Planetary mean density 2.52 ± 0.20
( 3.34 ± 0.27 )
ρjup
g cm-3
Planetary equilibrium temperature 883 ± 11 K
Reference of detailed study 2011MNRAS.417.2166S  

 

Entries in the catalogue of Rossiter-McLaughlin measurements:
 
Reference λ (degrees)
Narita et al. (2008)   62   ±   25  
Cochran et al. (2008)   9.4   ±   9.3  
Barbieri et al. (2009)   −4.8   ±   5.3  
Narita et al. (2009)   10.0   ±   5.1  

 

 

HD 17156 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same as the physical properties given above, but in some cases the Homogeneous Studies results given below have been superseded by newer analyses.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 272.7 ± 2.1 m/s
Stellar effective temperature 6079 ± 56 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.24 ± 0.05 dex
Orbital inclination 86.94 ± 0.34   degrees
Fractional stellar radius (R* / a) 0.04222 ± 0.00079  
Fractional planetary radius (Rpl / a)   0.003107 ± 0.000081   
Light curve analysis reference 2011MNRAS.417.2166S  
 
Derived parameters Value Unit
Stellar mass 1.297 ± 0.046 ± 0.053 Msun
Stellar radius 1.487 ± 0.037 ± 0.020 Rsun
Stellar logarithmic surface gravity 4.207 ± 0.018 ± 0.006 c.g.s.
Stellar mean density 0.395 ± 0.022 ρsun
Orbital semimajor axis   0.1637 ± 0.0019 ± 0.0022  AU
Planetary mass 3.262 ± 0.072 ± 0.088 Mjup
Planetary radius 1.065 ± 0.033 ± 0.014 Rjup
Planetary surface gravity 71.2 ± 3.7 m/s2
Planetary mean density 2.52 ± 0.20 ± 0.03 ρjup
Planetary equilibrium temperature 883 ± 11 K
Safronov number 0.772 ± 0.026 ± 0.010  
Main analysis reference 2011MNRAS.417.2166S  

 


Page generated on 2017/12/13           John Southworth   (Keele University, UK)