TEPCat: TOI-2257


 

This page summarises the information held within TEPCat for the transiting planetary system TOI-2257. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper arXiv:2111.01749  
Date of discovery paper 2021 / 11 / 3 y / m / d
Data/telescope used for discovery TESS  
Right ascension 12 58 57.67 h m s
Declination +77 39 41.6 d m s
Right ascension (decimal) 194.74029 degrees
Declination (decimal) 77.66156 degrees
V-band apparent magnitude 15.21 mag
K-band apparent magnitude 10.67 mag
Transit duration 0.1602
( 3.845 )
day
hour
Transit depth 0.4 %
Time of mid-transit   2459007.9795 ± 0.0010     HJD or BJD
Orbital period 35.189346 ± 0.000090 days
Reference for orbital ephemeris   arXiv:2111.01749  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 3430 ± 130 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.27 ± 0.37 dex
Stellar mass 0.328 +0.021 −0.019   Msun
Stellar radius 0.313 ± 0.015 Rsun
Stellar logarithmic surface gravity 4.971 ± 0.050 c.g.s.
Stellar mean density 11.2 ± 1.8
( 15.8 ± 2.5 )
ρsun
g cm-3
Orbital eccentricity 0.50 +0.22 −0.13  
Orbital semimajor axis   0.145 ± 0.003  AU
Planetary mass 0.018 +0.013 −0.007
( 5.7 +4.1 −2.2 )
Mjup
Mearth
Planetary radius 0.196 ± 0.010
( 2.20 ± 0.11 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density ρjup
g cm-3
Planetary equilibrium temperature 256 +61 −17 K
Reference of detailed study xxx211101749xxx211101749  

 

TOI-2257 does not have an entry in the catalogue of orbital obliquity measurements.

 

TOI-2257 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2022/12/01           John Southworth   (Keele University, UK)