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   2455954.58576 ± 0.00009     HJD or BJD
Orbital period 1.354133 ± 0.000001 days
Reference for orbital ephemeris   2013A+A...558A..55M  

 

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 0.882 ± 0.037   Msun
Stellar radius 0.898 ± 0.019 Rsun
Stellar logarithmic surface gravity 4.48 ± 0.02 c.g.s.
Stellar mean density ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.0230 ± 0.0003  AU
Planetary mass 1.345 ± 0.150
( 427 ± 47 ) 		Mjup
Mearth
Planetary radius 1.168 ± 0.030
( 13.09 ± 0.34 ) 		Rjup
Rearth
Planetary surface gravity 25 ± 3
3.40 ± 0.05		 m/s2
log(cgs)
Planetary mean density 0.79 ± 0.11
( 1.05 ± 0.15 ) 		ρjup
g cm-3
Planetary equilibrium temperature 1577 ± 31 K
Reference of detailed study 2013A+A...558A..55M  

 

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

 

 

Page generated on 2023/09/01           John Southworth   (Keele University, UK)