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 0.04759
( 1.1422 )
day
hour
Transit depth 0.76 %
Time of mid-transit   2457665.35084 ± 0.00020     HJD or BJD
Orbital period 12.354473 ± 0.000018 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 +0.061 −0.0  
Orbital semimajor axis   0.0467 ± 0.0011  AU
Planetary mass 0.0036 ± 0.0003
( 1.144 ± 0.095 )
Mjup
Mearth
Planetary radius 0.1024 ± 0.0029
( 1.148 ± 0.033 )
Rjup
Rearth
Planetary surface gravity 8.54 ± 0.38
2.93 ± 0.02
m/s2
log(cgs)
Planetary mean density 4.17 ± 0.18
( 5.53 ± 0.24 )
ρjup
g cm-3
Planetary equilibrium temperature 194.5 ± 2.7 K
Reference of detailed study arXiv:1802.01377  

 

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

 

TRAPPIST-1g 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)