TEPCat: HAT-P-31


 

This page summarises the information held within TEPCat for the transiting planetary system HAT-P-31. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2011AJ....142...95K  
Date of discovery paper 2011 / 6 / 8 y / m / d
Right ascension 18 06 09.00 h m s
Declination +26 25 36.0 d m s
V-band apparent magnitude 11.66 mag
K-band apparent magnitude 10.08 mag
Transit duration 0.214
( 5.14 )
day
hour
Transit depth 0.51 %
Time of mid-transit   2454320.8866 ± 0.0052     HJD or BJD
Orbital period 5.005425 ± 0.000092 days
Reference for orbital ephemeris   2011AJ....142...95K  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6065 ± 100 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.15 ± 0.08 dex
Stellar mass 1.218 +0.089 −0.063   Msun
Stellar radius 1.36 +0.27 −0.18 Rsun
Stellar logarithmic surface gravity 4.26 +0.11 −0.13 c.g.s.
Stellar mean density 0.49 +0.17 −0.18
( 0.69 +0.24 −0.25 )
ρsun
g cm-3
Orbital eccentricity 0.2450 ± 0.0045  
Orbital semimajor axis   0.055 ± 0.015  AU
Planetary mass 2.171 +0.105 −0.077
( 690 +33 −24 )
Mjup
Mearth
Planetary radius 1.07 +0.24 −0.16
( 12.0 + 2.7 − 1.8 )
Rjup
Rearth
Planetary surface gravity 41 +17 −21
3.6 +0.2 −0.3
m/s2
log(cgs)
Planetary mean density 1.64 +0.93 −0.70
( 2.18 +1.23 −0.93 )
ρjup
g cm-3
Planetary equilibrium temperature 1450 +230 −110 K
Reference of detailed study 2011AJ....142...95K  

 

HAT-P-31 does not have an entry in the catalogue of Rossiter-McLaughlin measurements.

 

HAT-P-31 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


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