Six different distance determination methods of Virgo cluster members yield a mean distance modulus of ( m - M ) ^ { 0 } _ { Virgo } = 31.60 \pm 0.09 ( 20.9 \pm 0.9 \nobreak \mbox { $ \hskip { 5.0 pt } $Mpc } ) .
This value can be carried out to \mathrel { \hbox { \hbox to 0.0 pt { \hbox { \lower 4.0 pt \hbox { $ \sim$ } } } \hbox { $ > $ } } } 10 % 000 \nobreak \mbox { $ \hskip { 5.0 pt } $km s$ { } ^ { -1 } $ } by means of 31 clusters whose distances are well known relative to the Virgo cluster .
They yield H _ { 0 } = 56 \pm 4 ( random error ) \pm 6 ( systematic error ) , independent of local streaming motions .