TEPCat: TOI-257


 

This page summarises the information held within TEPCat for the transiting planetary system TOI-257. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper arXiv:2001.07345  
Date of discovery paper 2020 / 1 / 22 y / m / d
Right ascension 03 10 03.98 h m s
Declination −50 49 56.6 d m s
V-band apparent magnitude 7.61 mag
K-band apparent magnitude 6.26 mag
Transit duration 0.2644
( 6.346 )
day
hour
Transit depth 0.12 %
Time of mid-transit   2458404.14831 ± 0.00056     HJD or BJD
Orbital period 18.38827 ± 0.00072 days
Reference for orbital ephemeris   arXiv:2001.07345  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6096 ± 89 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.177 ± 0.099 dex
Stellar mass 1.394 ± 0.046   Msun
Stellar radius 1.883 ± 0.033 Rsun
Stellar logarithmic surface gravity 4.032 ± 0.021 c.g.s.
Stellar mean density 0.208 +0.013 −0.012
( 0.293 +0.018 −0.017 )
ρsun
g cm-3
Orbital eccentricity 0.242 +0.040 −0.065  
Orbital semimajor axis   0.1523 ± 0.0017  AU
Planetary mass 0.134 +0.023 −0.022
( 42.6 +7.3 −7.0 )
Mjup
Mearth
Planetary radius 0.626 +0.013 −0.12
( 7.02 +0.15 −1.35 )
Rjup
Rearth
Planetary surface gravity 8.5 +1.5 −1.4
2.93 +0.07 −0.08
m/s2
log(cgs)
Planetary mean density 0.51 +0.10 −0.09
( 0.68 +0.13 −0.12 )
ρjup
g cm-3
Planetary equilibrium temperature 1033 +19 −18 K
Reference of detailed study arXiv:2001.07345  

 

TOI-257 does not have an entry in the catalogue of orbital obliquity measurements.

 

TOI-257 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2021/12/02           John Southworth   (Keele University, UK)