TEPCat: XO-4


 

This page summarises the information held within TEPCat for the transiting planetary system XO-4. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper arXiv:0805.2921  
Date of discovery paper 2008 / 5 / 19 y / m / d
Data/telescope used for discovery XO  
Right ascension 07 21 33.17 h m s
Declination +58 16 05.0 d m s
Right ascension (decimal) 110.38821 degrees
Declination (decimal) 58.26806 degrees
V-band apparent magnitude 10.67 mag
K-band apparent magnitude 9.41 mag
Transit duration 0.18448
( 4.4275 )
day
hour
Transit depth 0.8 %
Time of mid-transit   2455067.5685 ± 0.0003     HJD or BJD
Orbital period 4.1250683 ± 0.00000013 days
Reference for orbital ephemeris   2022ExA....53..547K  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6397 ± 70 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.04 ± 0.05 dex
Stellar mass 1.293 +0.030 −0.029   Msun
Stellar radius 1.554 +0.042 −0.030 Rsun
Stellar logarithmic surface gravity 4.166 +0.013 −0.018 c.g.s.
Stellar mean density 0.344 +0.016 −0.022
( 0.485 +0.023 −0.031 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.05485 ± 0.00042  AU
Planetary mass 1.615 ± 0.10
( 513 ± 31 )
Mjup
Mearth
Planetary radius 1.317 +0.040 −0.029
( 14.76 + 0.45 − 0.33 )
Rjup
Rearth
Planetary surface gravity 23.0 +1.8 −1.7
3.36 +0.03 −0.03
m/s2
log(cgs)
Planetary mean density 0.658 +0.061 −0.063
( 0.873 +0.081 −0.084 )
ρjup
g cm-3
Planetary equilibrium temperature 1641 +25 −21 K
Reference of detailed study 2016ApJ...820...87V  

 

Entries in the catalogue of orbital obliquity measurements:
 
Reference λ (degrees)
Narita et al. (2010)   −46.7   + 8.1   - 6.1  

 

 


Page generated on 2024/07/19           John Southworth   (Keele University, UK)