TEPCat: HAT-P-20


 

This page summarises the information held within TEPCat for the transiting planetary system HAT-P-20. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2011ApJ...742..116B  
Date of discovery paper 2010 / 8 / 23 y / m / d
Right ascension 07 27 39.96 h m s
Declination +24 20 11.0 d m s
V-band apparent magnitude 11.34 mag
K-band apparent magnitude 8.60 mag
Transit duration 0.0770
( 1.848 )
day
hour
Transit depth 1.9 %
Time of mid-transit   2455917.64431 ± 0.00006     HJD or BJD
Orbital period 2.8753172 ± 0.0000003 days
Reference for orbital ephemeris   2017AJ....153...28S  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 4595 ± 45 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.22 ± 0.09 dex
Stellar mass 0.748 ± 0.042   Msun
Stellar radius 0.680 ± 0.006 Rsun
Stellar logarithmic surface gravity 4.643 ± 0.020 c.g.s.
Stellar mean density 1.67 ± 0.11
( 2.36 ± 0.16 )
ρsun
g cm-3
Orbital eccentricity 0.0172 ± 0.0016  
Orbital semimajor axis   0.03593 ± 0.00029  AU
Planetary mass 7.22 ± 0.36
( 22952 ± 1144 )
Mjup
Mearth
Planetary radius 1.025 ± 0.053
( 11.49 ± 0.59 )
Rjup
Rearth
Planetary surface gravity 170.2 +7.6 −7.3
4.23 +0.02 −0.02
m/s2
log(cgs)
Planetary mean density 6.26 ± 0.29
( 8.30 ± 0.38 )
ρjup
g cm-3
Planetary equilibrium temperature 964 ± 10 K
Reference of detailed study 2017A+A...601A..53E  

 

Entries in the catalogue of Rossiter-McLaughlin measurements:
 
Reference λ (degrees)
Esposito et al. (2017)   −8.0   ±   6.9  

 

 

HAT-P-20 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)