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 0.02513
( 0.6031 )
day
hour
Transit depth 0.73 %
Time of mid-transit   2457322.51654 ± 0.00012     HJD or BJD
Orbital period 1.51087637 ± 0.00000039 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 +0.081 −0.0  
Orbital semimajor axis   0.01150 +0.00028 −0.00025  AU
Planetary mass 0.0032 +0.0004 −0.0005
( 1.02 +0.13 −0.16 )
Mjup
Mearth
Planetary radius 0.1000 +0.0029 −0.0028
( 1.121 +0.033 −0.031 )
Rjup
Rearth
Planetary surface gravity 7.97 ± 1.00
2.90 ± 0.05
m/s2
log(cgs)
Planetary mean density 3.99 ± 0.50
( 5.29 ± 0.66 )
ρjup
g cm-3
Planetary equilibrium temperature 391.8 ± 5.5 K
Reference of detailed study 2018A+A...613A..68G  

 

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

 

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

 


Page generated on 2018/10/12           John Southworth   (Keele University, UK)