TEPCat: TRAPPIST-1b


 

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

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2016Natur.533..221G  
Date of discovery paper 2016 / 5 / 3 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 0.02528
( 0.6067 )
day
hour
Transit depth 0.73 %
Time of mid-transit   2457322.51736 ± 0.00010     HJD or BJD
Orbital period 1.51087081 ± 0.00000060 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 +0.081 −0.0  
Orbital semimajor axis   0.01111 ± 0.00034  AU
Planetary mass 0.0025 ± 0.0008
( 0.79 ± 0.25 )
Mjup
Mearth
Planetary radius 0.0969 ± 0.0031
( 1.086 ± 0.035 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density 2.7 ± 2.3
( 3.6 ± 3.1 )
ρjup
g cm-3
Planetary equilibrium temperature 400.1 ± 7.7 K
Reference of detailed study 2017Natur.542..456G  

 

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

 

TRAPPIST-1b 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)