TEPCat: TRAPPIST-1d


 

This page summarises the information held within TEPCat for the transiting planetary system TRAPPIST-1d. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2017Natur.542..456G  
Date of discovery paper 2017 / 2 / 23 y / m / d
Data/telescope used for discovery TRAPPIST  
Right ascension 23 06 29.28 h m s
Declination −05 02 28.5 d m s
Right ascension (decimal) 346.62200 degrees
Declination (decimal) -5.04125 degrees
V-band apparent magnitude 18.80 mag
K-band apparent magnitude 10.30 mag
Transit duration 0.03426
( 0.8222 )
day
hour
Transit depth 0.39 %
Time of mid-transit   2457257.06768 ± 0.00067     HJD or BJD
Orbital period 4.049219 ± 0.000026 days
Reference for orbital ephemeris   2021PSJ.....2....1A  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 2566 ± 26 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.04 ± 0.08 dex
Stellar mass 0.0898 ± 0.0023   Msun
Stellar radius 0.1192 ± 0.0013 Rsun
Stellar logarithmic surface gravity 5.2396 +0.0056 −0.0073 c.g.s.
Stellar mean density 48.0 ± 3.9
( 67.7 ± 5.5 )
ρsun
g cm-3
Orbital eccentricity 0.0 +0.070 −0.0  
Orbital semimajor axis   0.02227 ± 0.00019  AU
Planetary mass 0.0122 ± 0.0001
( 3.878 ± 0.032 )
Mjup
Mearth
Planetary radius 0.0703 +0.0010 −0.0009
( 0.788 +0.011 −0.010 )
Rjup
Rearth
Planetary surface gravity 6.12 ± 0.19
2.79 ± 0.01
m/s2
log(cgs)
Planetary mean density 3.28 ± 0.12
( 4.35 ± 0.16 )
ρjup
g cm-3
Planetary equilibrium temperature 282.1 ± 4.0 K
Reference of detailed study 2021PSJ.....2....1A  

 

TRAPPIST-1d does not have an entry in the catalogue of orbital obliquity measurements.

 


Page generated on 2024/04/19           John Southworth   (Keele University, UK)