TEPCat: XO-2


 

This page summarises the information held within TEPCat for the transiting planetary system XO-2. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2007ApJ...671.2115B  
Date of discovery paper 2007 / 4 / 30 y / m / d
Data/telescope used for discovery XO  
Right ascension 07 48 06.47 h m s
Declination +50 13 33.0 d m s
Right ascension (decimal) 117.02696 degrees
Declination (decimal) 50.22583 degrees
V-band apparent magnitude 11.25 mag
K-band apparent magnitude 9.31 mag
Transit duration 0.11260
( 2.7024 )
day
hour
Transit depth 1.4 %
Time of mid-transit   2458843.218463 ± 0.000069     HJD or BJD
Orbital period 2.615859462 ± 0.000000054 days
Reference for orbital ephemeris   2024MNRAS.530.2475Y  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5332 ± 57 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.43 ± 0.05 dex
Stellar mass 0.96 ± 0.05   Msun
Stellar radius 0.998 +0.032 −0.033 Rsun
Stellar logarithmic surface gravity 4.44 ± 0.08 c.g.s.
Stellar mean density 0.960 +0.037 −0.034
( 1.355 +0.052 −0.048 )
ρsun
g cm-3
Orbital eccentricity 0.0 +0.006 −0.0  
Orbital semimajor axis   0.03616 +0.00119 −0.00247  AU
Planetary mass 0.597 ± 0.021
( 189.78 ± 6.68 )
Mjup
Mearth
Planetary radius 1.019 ± 0.031
( 11.42 ± 0.35 )
Rjup
Rearth
Planetary surface gravity 14.13 +10.1 −0.94
3.15 +0.23 −0.03
m/s2
log(cgs)
Planetary mean density 0.528 +0.054 −0.048
( 0.700 +0.072 −0.064 )
ρjup
g cm-3
Planetary equilibrium temperature 1328 +17 −28 K
Reference of detailed study 2015A+A...575A.111D  

 

Entries in the catalogue of orbital obliquity measurements:
 
Reference λ (degrees)
Narita et al. (2011)   10   ±   72  
Damasso et al. (2015)   7   ±   11  

 

 


Page generated on 2024/05/08           John Southworth   (Keele University, UK)