TEPCat: HD 191939b


 

This page summarises the information held within TEPCat for the transiting planetary system HD 191939b. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2020AJ....160..113B  
Date of discovery paper 2020 / 2 / 11 y / m / d
Data/telescope used for discovery TESS  
Right ascension 20 08 06.15 h m s
Declination +66 51 01.1 d m s
Right ascension (decimal) 302.02562 degrees
Declination (decimal) 66.85031 degrees
V-band apparent magnitude 8.97 mag
K-band apparent magnitude 7.18 mag
Transit duration 0.1225
( 2.940 )
day
hour
Transit depth 0.11 %
Time of mid-transit   2459443.54236 ± 0.00024     HJD or BJD
Orbital period 8.8803256 ± 0.0000047 days
Reference for orbital ephemeris   2023A+A...669A..40O  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5427 ± 50 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.16 ± 0.08 dex
Stellar mass 0.92 ± 0.06   Msun
Stellar radius 0.945 ± 0.021 Rsun
Stellar logarithmic surface gravity 4.40 ± 0.10 c.g.s.
Stellar mean density 1.16 +0.62 −0.28
( 1.64 +0.87 −0.40 )
ρsun
g cm-3
Orbital eccentricity 0.031 +0.010 −0.011  
Orbital semimajor axis   0.0804 +0.0025 −0.0023  AU
Planetary mass 0.0315 ± 0.0022
( 10.01 ± 0.70 )
Mjup
Mearth
Planetary radius 0.3042 ± 0.0067
( 3.410 ± 0.075 )
Rjup
Rearth
Planetary surface gravity 8.4 +0.8 −0.7
2.92 +0.04 −0.04
m/s2
log(cgs)
Planetary mean density 1.06 +0.11 −0.10
( 1.41 +0.15 −0.13 )
ρjup
g cm-3
Planetary equilibrium temperature 880 ± 20 K
Reference of detailed study 2023A+A...669A..40O  

 

Entries in the catalogue of orbital obliquity measurements:
 
Reference λ (degrees)
Lubin et al. (2024)   3.7   ±   5.0  

 

 


Page generated on 2025/02/12           John Southworth   (Keele University, UK)