A comparison of cosmological distance measures, from redshift zero to redshift of 0.5. The background cosmology is Hubble parameter 72 km/s/Mpc, 
  
    
      
        
          Ω
          
            Λ
          
        
        =
        0.732
      
    
    {\displaystyle \Omega _{\Lambda }=0.732}
  
, 
  
    
      
        
          Ω
          
            
              m
              a
              t
              t
              e
              r
            
          
        
        =
        0.266
      
    
    {\displaystyle \Omega _{\rm {matter}}=0.266}
  
, 
  
    
      
        
          Ω
          
            
              r
              a
              d
              i
              a
              t
              i
              o
              n
            
          
        
        =
        0.266
        
          /
        
        3454
      
    
    {\displaystyle \Omega _{\rm {radiation}}=0.266/3454}
  
, and 
  
    
      
        
          Ω
          
            k
          
        
      
    
    {\displaystyle \Omega _{k}}
  
 chosen so that the sum of Omega parameters is 1.