TEPCat: WASP-121


 

This page summarises the information held within TEPCat for the transiting planetary system WASP-121. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2016MNRAS.458.4025D  
Date of discovery paper 2015 / 6 / 9 y / m / d
Right ascension 07 10 24.06 h m s
Declination −39 05 50.6 d m s
V-band apparent magnitude 10.52 mag
K-band apparent magnitude 9.37 mag
Transit duration 0.12
( 2.9 )
day
hour
Transit depth 1.6 %
Time of mid-transit   2456635.70832 ± 0.00011     HJD or BJD
Orbital period 1.2749255 ± 0.0000023 days
Reference for orbital ephemeris   2016MNRAS.458.4025D  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6460 ± 140 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.13 ± 0.09 dex
Stellar mass 1.353 +0.080 −0.079   Msun
Stellar radius 1.458 ± 0.030 Rsun
Stellar logarithmic surface gravity 4.242 +0.011 −0.012 c.g.s.
Stellar mean density 0.437 +0.008 −0.009
( 0.617 +0.011 −0.013 )
ρsun
g cm-3
Orbital eccentricity 0.0 +0.07 −0.0  
Orbital semimajor axis   0.02544 +0.00049 −0.00050  AU
Planetary mass 1.183 +0.064 −0.062
( 376 +20 −19 )
Mjup
Mearth
Planetary radius 1.865 ± 0.044
( 20.90 ± 0.49 )
Rjup
Rearth
Planetary surface gravity 9.40 ± 0.37
2.97 ± 0.02
m/s2
log(cgs)
Planetary mean density 0.183 ± 0.016
( 0.243 ± 0.021 )
ρjup
g cm-3
Planetary equilibrium temperature 2358 ± 52 K
Reference of detailed study 2016MNRAS.458.4025D  

 

Entries in the catalogue of Rossiter-McLaughlin measurements:
 
Reference λ (degrees)
Delrez et al. (2015)   −257.8   + 5.5   - 5.3  

 

 

WASP-121 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


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