TEPCat: HAT-P-9


 

This page summarises the information held within TEPCat for the transiting planetary system HAT-P-9. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2009ApJ...690.1393S  
Date of discovery paper 2008 / 6 / 25 y / m / d
Right ascension 07 20 40.48 h m s
Declination +37 08 26.2 d m s
V-band apparent magnitude 12.30 mag
K-band apparent magnitude 11.02 mag
Transit duration 0.143
( 3.43 )
day
hour
Transit depth 1.3 %
Time of mid-transit   2454417.9084 ± 0.0006     HJD or BJD
Orbital period 3.922814 ± 0.000002 days
Reference for orbital ephemeris   2012NewA...17..438D  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6350 ± 150 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.12 ± 0.20 dex
Stellar mass 1.28 ± 0.10   Msun
Stellar radius 1.339 ± 0.080 Rsun
Stellar logarithmic surface gravity 4.293 ± 0.046 c.g.s.
Stellar mean density 0.534 ± 0.082
( 0.75 ± 0.12 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.0529 ± 0.0014  AU
Planetary mass 0.778 ± 0.083
( 247 ± 26 )
Mjup
Mearth
Planetary radius 1.38 ± 0.10
( 15.5 ± 1.1 )
Rjup
Rearth
Planetary surface gravity 10.1 ± 1.7
3.00 ± 0.07
m/s2
log(cgs)
Planetary mean density 0.275 ± 0.066
( 0.365 ± 0.088 )
ρjup
g cm-3
Planetary equilibrium temperature 1540 ± 53 K
Reference of detailed study 2012MNRAS.426.1291S  

 

Entries in the catalogue of Rossiter-McLaughlin measurements:
 
Reference λ (degrees)
Moutou et al. (2011)   −16   ±   8  

 

 

HAT-P-9 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same as the physical properties given above, but in some cases the Homogeneous Studies results given below have been superseded by newer analyses.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 84.7 ± 7.9 m/s
Stellar effective temperature 6350 ± 150 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.12 ± 0.20 dex
Orbital inclination 86.10 ± 0.54   degrees
Fractional stellar radius (R* / a) 0.1177 ± 0.0060  
Fractional planetary radius (Rpl / a)   0.01250 ± 0.00089   
Light curve analysis reference 2012MNRAS.426.1291S  
 
Derived parameters Value Unit
Stellar mass 1.28 ± 0.10 ± 0.02 Msun
Stellar radius 1.339 ± 0.080 ± 0.008 Rsun
Stellar logarithmic surface gravity 4.293 ± 0.046 ± 0.002 c.g.s.
Stellar mean density 0.534 ± 0.082 ρsun
Orbital semimajor axis   0.0529 ± 0.0014 ± 0.0003  AU
Planetary mass 0.778 ± 0.083 ± 0.009 Mjup
Planetary radius 1.38 ± 0.10 ± 0.01 Rjup
Planetary surface gravity 10.1 ± 1.7 m/s2
Planetary mean density 0.275 ± 0.066 ± 0.002 ρjup
Planetary equilibrium temperature 1540 ± 53 K
Safronov number 0.0463 ± 0.0056 ± 0.0003  
Main analysis reference 2012MNRAS.426.1291S  

 


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