15 - 25 < 15
V, 56.3 - 0.32E - 24(N - Z)/A 47.01 - 0.267E - 0.0018E2
r0, 1.17 1.322 - 7.6A10-4 = 4A210-6 - 8A310-9
a0, 0.75 0.66
W, 0.22E - 1.56 0,  
WD, 13 - 0.25E - 12(N-Z)/A 0, 9.52 - 0.053E
rW, 1.26  
rD, 1.26 1.266 - 3.7A10-4 = 2A210-6 - 4A310-9
aW, 0.58  
aD, 0.58 0.48
VSO, 6.2  
rSO, 1.1  
aSO, 0.75  

 

 

  Becchetti and Greenlees Menet et al.
V, 54.0 0.32E + 24(N Z)/A + 0.4(Z)/A1/3 49.9 0.22E + 26.4 (N Z)/A + 0.4(Z)/A 1/3
r0, 1.17 1.16
a0, 0.75 0.75
W, 0.22E 2.7 0, 1.2 + 0.09E 0,
WD, 11.8 0.25E + 12(N Z)/A 0, 4.2 0.05E + 15.5 (N Z)/A 0,
rW, 1.32 1.37
rD, 1.32 1.37
aW, 0.51 + 0.7 (N Z)/A 0.74 0.008E + 1.0 (N Z)/A
aD, 0.51 + 0.7 (N Z)/A 0.74 0.008E + 1.0 (N Z)/A
VSO, 6.2 6.04
rSO, 1.01 1.064
aSO, 0.75 0.78
rC   1.25

 

  Perey and Perey
V, 81.0 0.22E + 2.0(Z)/A1/3
r0, 1.15
a0, 0.81
WD, 14.4 + 0.24E
rD, 1.34
aD, 0.68
rC 1.15