TEPCat: HD 149026


 

This page summarises the information held within TEPCat for the transiting planetary system HD 149026. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2005ApJ...633..465S  
Date of discovery paper 2005 / 5 / 31 y / m / d
Right ascension 16 30 29.62 h m s
Declination +38 20 50.3 d m s
V-band apparent magnitude 8.16 mag
K-band apparent magnitude 6.82 mag
Transit duration 0.135
( 3.24 )
day
hour
Transit depth 0.3 %
Time of mid-transit   2454456.78760 ± 0.00016     HJD or BJD
Orbital period 2.87588874 ± 0.00000059 days
Reference for orbital ephemeris   arXiv:1710.07642  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6147 ± 50 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.36 ± 0.05 dex
Stellar mass 1.345 ± 0.020   Msun
Stellar radius 1.541 +0.046 −0.042 Rsun
Stellar logarithmic surface gravity 4.189 +0.020 −0.021 c.g.s.
Stellar mean density 0.353 +0.030 −0.040
( 0.498 +0.042 −0.056 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.04313 +0.00065 −0.00056  AU
Planetary mass 0.368 +0.013 −0.014
( 116.98 +4.13 −4.45 )
Mjup
Mearth
Planetary radius 0.813 +0.027 −0.025
( 9.11 +0.30 −0.28 )
Rjup
Rearth
Planetary surface gravity 13.55 +0.94 −1.05
3.13 +0.03 −0.04
m/s2
log(cgs)
Planetary mean density 0.68 +0.08 −0.07
( 0.902 +0.106 −0.093 )
ρjup
g cm-3
Planetary equilibrium temperature 1634 +90 −23 K
Reference of detailed study 2009ApJ...696..241C  

 

Entries in the catalogue of Rossiter-McLaughlin measurements:
 
Reference λ (degrees)
Wolf et al. (2007)   −12   ±   15  
Albrecht et al. (2012)   12   ±   7  

 

 

HD 149026 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same as the physical properties given above, but in some cases the Homogeneous Studies results given below have been superseded by newer analyses.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 43.3 ± 1.2 m/s
Stellar effective temperature 6147 ± 50 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.36 ± 0.05 dex
Orbital inclination 88.0 ± 2.0   degrees
Fractional stellar radius (R* / a) 0.140 +0.012 −0.006  
Fractional planetary radius (Rpl / a)   0.0068 +0.0011 −0.0008   
Light curve analysis reference 2008MNRAS.386.1644S  
 
Derived parameters Value Unit
Stellar mass 1.271 +0.043 −0.017 +0.012 −0.017 Msun
Stellar radius 1.29 +0.12 −0.06 ± 0.01 Rsun
Stellar logarithmic surface gravity 4.321 +0.042 −0.070 +0.001 −0.002 c.g.s.
Stellar mean density 0.592 +0.083 −0.129 ρsun
Orbital semimajor axis   0.04288 +0.00048 −0.00027 +0.00013 −0.00019  AU
Planetary mass 0.356 +0.013 −0.011 +0.002 −0.003 Mjup
Planetary radius 0.610 +0.099 −0.072 +0.002 −0.003 Rjup
Planetary surface gravity 23.7 +6.8 −6.2 m/s2
Planetary mean density 1.57 +0.67 −0.53 ± 0.01 ρjup
Planetary equilibrium temperature 1626 +69 −37 K
Safronov number 0.0393 +0.0054 −0.0056 +0.0002 −0.0001  
Main analysis reference 2010MNRAS.408.1689S  

 


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