Venus is well known to have no intrinsic magnetic field. Instead, when Venus interacts with the solar wind, a fast mode magnetosonic wave, in this case a bow shock, is formed as the wind impinges upon the ionosphere. [Russell] As the wind passes over the ionosphere, it is slowed down and a region of ``shocked" solar wind, the magnetosheath, is formed. The properties of the bow shock at Venus show particular dependence on the Mach number from the solar wind, as well as dependence on the phase of the solar cycle. The phase of the solar cycle has been observed to vary the distance to the bow shock from the
