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
Right ascension 23 06 29.28 h m s
Declination −05 02 28.5 d m s
V-band apparent magnitude 18.80 mag
K-band apparent magnitude 10.30 mag
Transit duration 0.03426
( 0.8222 )
day
hour
Transit depth 0.36 %
Time of mid-transit   2457670.14227 ± 0.00026     HJD or BJD
Orbital period 4.049959 ± 0.000078 days
Reference for orbital ephemeris   2018MNRAS.475.3577D  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 2511 ± 37 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.04 ± 0.08 dex
Stellar mass 0.0890 ± 0.0070   Msun
Stellar radius 0.1210 ± 0.0030 Rsun
Stellar logarithmic surface gravity c.g.s.
Stellar mean density 51.1 +1.2 −2.4
( 72.1 + 1.7 − 3.4 )
ρsun
g cm-3
Orbital eccentricity 0.0 +0.070 −0.0  
Orbital semimajor axis   0.02219 +0.00053 −0.00048  AU
Planetary mass 0.0009 ± 0.0001
( 0.286 ± 0.032 )
Mjup
Mearth
Planetary radius 0.0699 ± 0.0021
( 0.784 ± 0.024 )
Rjup
Rearth
Planetary surface gravity 4.74 ± 0.47
2.68 ± 0.04
m/s2
log(cgs)
Planetary mean density 3.38 ± 0.34
( 4.48 ± 0.45 )
ρjup
g cm-3
Planetary equilibrium temperature 282.1 ± 4.0 K
Reference of detailed study arXiv:1802.01377  

 

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

 

TRAPPIST-1d has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2018/04/18           John Southworth   (Keele University, UK)