TEPCat: Qatar-2


 

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

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2012ApJ...750...84B  
Date of discovery paper 2011 / 10 / 27 y / m / d
Right ascension 13 50 37.40 h m s
Declination −06 48 14.4 d m s
V-band apparent magnitude 13.49 mag
K-band apparent magnitude 10.62 mag
Transit duration 0.07541
( 1.8098 )
day
hour
Transit depth 3.2 %
Time of mid-transit   2457250.200816 ± 0.000008     HJD or BJD
Orbital period 1.33711677 ± 0.00000010 days
Reference for orbital ephemeris   2017MNRAS.471..394M  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 4645 ± 50 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.02 ± 0.08 dex
Stellar mass 0.727 ± 0.024   Msun
Stellar radius 0.7033 ± 0.0080 Rsun
Stellar logarithmic surface gravity 4.530 ± 0.005 c.g.s.
Stellar mean density 2.090 ± 0.015
( 2.949 ± 0.021 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.02136 ± 0.00024  AU
Planetary mass 2.466 ± 0.062
( 783 ± 19 )
Mjup
Mearth
Planetary radius 1.115 ± 0.013
( 12.50 ± 0.15 )
Rjup
Rearth
Planetary surface gravity 39.34 ± 0.52
3.595 ± 0.006
m/s2
log(cgs)
Planetary mean density 1.776 ± 0.034
( 2.356 ± 0.045 )
ρjup
g cm-3
Planetary equilibrium temperature 1388 ± 8 K
Reference of detailed study 2017MNRAS.471..394M  

 

Entries in the catalogue of Rossiter-McLaughlin measurements:
 
Reference λ (degrees)
Mancini et al. (2014)   4.3   ±   4.5  
Mocnik et al. (2016)   0   ±   8  
Dai et al. (2016)   0   ±   10  
Esposito et al. (2017)   15   ±   20  

 

 

Qatar-2 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2017/12/11           John Southworth   (Keele University, UK)