TEPCat: WASP-42


 

This page summarises the information held within TEPCat for the transiting planetary system WASP-42. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2012A+A...544A..72L  
Date of discovery paper 2012 / 5 / 15 y / m / d
Right ascension 12 51 55.62 h m s
Declination −42 04 25.2 d m s
V-band apparent magnitude 12.57 mag
K-band apparent magnitude 10.03 mag
Transit duration 0.12043
( 2.8903 )
day
hour
Transit depth 2.0 %
Time of mid-transit   2455650.56728 ± 0.00015     HJD or BJD
Orbital period 4.9816819 ± 0.0000011 days
Reference for orbital ephemeris   2016MNRAS.457.4205S  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5315 ± 79 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.29 ± 0.05 dex
Stellar mass 0.951 ± 0.063   Msun
Stellar radius 0.892 ± 0.021 Rsun
Stellar logarithmic surface gravity 4.515 ± 0.023 c.g.s.
Stellar mean density 1.338 ± 0.092
( 1.89 ± 0.13 )
ρsun
g cm-3
Orbital eccentricity 0.060 ± 0.013  
Orbital semimajor axis   0.0561 ± 0.0012  AU
Planetary mass 0.527 ± 0.028
( 167.53 ± 8.90 )
Mjup
Mearth
Planetary radius 1.122 ± 0.039
( 12.58 ± 0.44 )
Rjup
Rearth
Planetary surface gravity 10.38 ± 0.61
3.02 ± 0.02
m/s2
log(cgs)
Planetary mean density 0.349 ± 0.030
( 0.463 ± 0.040 )
ρjup
g cm-3
Planetary equilibrium temperature 1021 ± 19 K
Reference of detailed study 2016MNRAS.457.4205S  

 

WASP-42 does not have an entry in the catalogue of Rossiter-McLaughlin measurements.

 

WASP-42 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


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