TEPCat: HATS-21


 

This page summarises the information held within TEPCat for the transiting planetary system HATS-21. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper arXiv:1607.00322  
Date of discovery paper 2016 / 7 / 4 y / m / d
Right ascension 18 40 44.40 h m s
Declination −58 27 33.3 d m s
V-band apparent magnitude 12.19 mag
K-band apparent magnitude 10.53 mag
Transit duration 0.0824
( 1.978 )
day
hour
Transit depth 1.2 %
Time of mid-transit   2457109.22538 ± 0.00057     HJD or BJD
Orbital period 3.5543973 ± 0.0000058 days
Reference for orbital ephemeris   arXiv:1607.00322  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5695 ± 67 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.300 ± 0.040 dex
Stellar mass 1.080 ± 0.026   Msun
Stellar radius 1.021 +0.089 −0.036 Rsun
Stellar logarithmic surface gravity 4.453 ± 0.055 c.g.s.
Stellar mean density 1.00 +0.11 −0.23
( 1.41 +0.16 −0.32 )
ρsun
g cm-3
Orbital eccentricity 0.0 +0.149 −0.0  
Orbital semimajor axis   0.04676 ± 0.00038  AU
Planetary mass 0.332 +0.040 −0.030
( 105.54 +12.72 −9.54 )
Mjup
Mearth
Planetary radius 1.123 +0.147 −0.054
( 12.59 + 1.65 − 0.61 )
Rjup
Rearth
Planetary surface gravity 6.5 +1.1 −1.4
2.81 +0.07 −0.11
m/s2
log(cgs)
Planetary mean density 0.219 +0.047 −0.065
( 0.291 +0.062 −0.086 )
ρjup
g cm-3
Planetary equilibrium temperature 1284 +55 −31 K
Reference of detailed study arXiv:1607.00322  

 

HATS-21 does not have an entry in the catalogue of Rossiter-McLaughlin measurements.

 

HATS-21 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)