TEPCat: HATS-2


 

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

Note that the declination of HATS-2 was given as "-22 21 46.8" in version 1 of the discovery paper but as "-22 33 46.8" in version 2 of the discovery paper. The declination from version 2 appears to be the correct one.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2013A+A...558A..55M  
Date of discovery paper 2013 / 4 / 9 y / m / d
Data/telescope used for discovery HATS  
Right ascension 11 46 57.38 h m s
Declination −22 33 46.8 d m s
Right ascension (decimal) 176.73908 degrees
Declination (decimal) -22.56300 degrees
V-band apparent magnitude 13.56 mag
K-band apparent magnitude 11.39 mag
Transit duration 0.0861
( 2.066 )
day
hour
Transit depth 2.2 %
Time of mid-transit   2458591.084931 ± 0.000096     HJD or BJD
Orbital period 1.35413379 ± 0.00000008 days
Reference for orbital ephemeris   arXiv:2403.04476  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5227 ± 95 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.15 ± 0.05 dex
Stellar mass 0.904 ± 0.052   Msun
Stellar radius 0.876 ± 0.020 Rsun
Stellar logarithmic surface gravity 4.510 ± 0.012 c.g.s.
Stellar mean density 1.346 ± 0.028
( 1.899 ± 0.040 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.02317 ± 0.00044  AU
Planetary mass 1.37 ± 0.16
( 435 ± 50 )
Mjup
Mearth
Planetary radius 1.122 ± 0.024
( 12.58 ± 0.27 )
Rjup
Rearth
Planetary surface gravity 27.0 ± 2.9
3.43 ± 0.04
m/s2
log(cgs)
Planetary mean density 0.91 ± 0.10
( 1.21 ± 0.13 )
ρjup
g cm-3
Planetary equilibrium temperature 1550 ± 29 K
Reference of detailed study arXiv:2403.04476  

 

Entries in the catalogue of orbital obliquity measurements:
 
Reference λ (degrees)
Mohler-Fischer et al. (2013)   8   ±   8  
Biagiotti et al. (2024)   3   ±   18  

 

 


Page generated on 2024/04/19           John Southworth   (Keele University, UK)