The luminosity of TRAPPIST-1 is   L  =  2.12 x 10^(23) W

 
    Planet          orbital radius a         equilibrium temperature 
                       x 10^(9) meters                 K
    ----------------------------------------------------------------- 
       b                 1.73                       397            
       c                 2.36                       340 
 
       d                 3.33                       286  
       e                 4.38                       250 
 
       f                 5.76                       218  
       g                 7.01                       197  
 
       h                 9.26                       172  
    -----------------------------------------------------------------