TEPCat: HAT-P-1


 

This page summarises the information held within TEPCat for the transiting planetary system HAT-P-1. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2007ApJ...656..552B  
Date of discovery paper 2006 / 8 / 12 y / m / d
Right ascension 22 57 46.83 h m s
Declination +38 40 29.8 d m s
V-band apparent magnitude 10.4 mag
K-band apparent magnitude 8.86 mag
Transit duration 0.11875
( 2.8500 )
day
hour
Transit depth 1.7 %
Time of mid-transit   2453979.93202 ± 0.00024     HJD or BJD
Orbital period 4.46529976 ± 0.00000055 days
Reference for orbital ephemeris   2014MNRAS.437...46N  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5975 ± 50 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.13 ± 0.05 dex
Stellar mass 1.151 ± 0.019   Msun
Stellar radius 1.174 +0.026 −0.027 Rsun
Stellar logarithmic surface gravity 4.359 ± 0.014 c.g.s.
Stellar mean density 0.644 +0.013 −0.016
( 0.909 +0.018 −0.023 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.05561 +0.00082 −0.00083  AU
Planetary mass 0.525 ± 0.019
( 166.89 ± 6.04 )
Mjup
Mearth
Planetary radius 1.319 ± 0.019
( 14.78 ± 0.21 )
Rjup
Rearth
Planetary surface gravity 7.46 ± 0.17
2.873 ± 0.010
m/s2
log(cgs)
Planetary mean density 0.213 +0.008 −0.007
( 0.2825 +0.0106 −0.0093 )
ρjup
g cm-3
Planetary equilibrium temperature 1322 +14 −15 K
Reference of detailed study 2014MNRAS.437...46N  

 

Entries in the catalogue of Rossiter-McLaughlin measurements:
 
Reference λ (degrees)
Johnson et al. (2008)   3.7   ±   2.1  

 

 

HAT-P-1 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same as the physical properties given above, but in some cases the Homogeneous Studies results given below have been superseded by newer analyses.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 59.3 ± 1.4 m/s
Stellar effective temperature 5975 ± 50 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.13 ± 0.05 dex
Orbital inclination 86.25 ± 0.22   degrees
Fractional stellar radius (R* / a) 0.0935 ± 0.0025  
Fractional planetary radius (Rpl / a)   0.01051 ± 0.00031   
Light curve analysis reference 2010MNRAS.408.1689S  
 
Derived parameters Value Unit
Stellar mass 1.134 ± 0.035 ± 0.026 Msun
Stellar radius 1.112 ± 0.031 ± 0.008 Rsun
Stellar logarithmic surface gravity 4.400 ± 0.024 ± 0.003 c.g.s.
Stellar mean density 0.824 ± 0.066 ρsun
Orbital semimajor axis   0.05535 ± 0.00057 ± 0.00042  AU
Planetary mass 0.524 ± 0.016 ± 0.008 Mjup
Planetary radius 1.217 ± 0.038 ± 0.009 Rjup
Planetary surface gravity 8.77 ± 0.56 m/s2
Planetary mean density 0.271 ± 0.025 ± 0.002 ρjup
Planetary equilibrium temperature 1291 ± 20 K
Safronov number 0.0419 ± 0.0016 ± 0.0003  
Main analysis reference 2010MNRAS.408.1689S  

 


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