TEPCat: TRAPPIST-1g


 

This page summarises the information held within TEPCat for the transiting planetary system TRAPPIST-1g. 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 0.04750
( 1.1400 )
day
hour
Transit depth 0.78 %
Time of mid-transit   2457665.34937 ± 0.00021     HJD or BJD
Orbital period 12.35294 ± 0.000012 days
Reference for orbital ephemeris   2017Natur.542..456G  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 2516 ± 41 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.04 ± 0.08 dex
Stellar mass 0.089 ± 0.006   Msun
Stellar radius 0.121 ± 0.003 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 +0.061 −0.0  
Orbital semimajor axis   0.0451 ± 0.0014  AU
Planetary mass 0.0018 ± 0.0012
( 0.57 ± 0.38 )
Mjup
Mearth
Planetary radius 0.1005 ± 0.0037
( 1.127 ± 0.041 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density 3.9 ± 2.6
( 5.2 ± 3.4 )
ρjup
g cm-3
Planetary equilibrium temperature 198.6 ± 3.8 K
Reference of detailed study 2017Natur.542..456G  

 

TRAPPIST-1g does not have an entry in the catalogue of Rossiter-McLaughlin measurements.

 

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

 


Page generated on 2017/12/15           John Southworth   (Keele University, UK)