Magnetosphere Size

The Magnetosphere property represents the size of an object's magnetosphere, the region of space where particles will be affected by the object's magnetic field.

The size of the magnetosphere, R_mag, sometimes called the Chapman-Ferraro distance, is calculated relative to the object's radius, R, using

$\frac{R_{mag}}{R} = \left(\frac{B^2}{\mu_0 P}\right)^{1/6}.$

where B is the strength of the magnetic field, P is the total stellar wind pressure, and μ₀ us the vacuum permeability constant,

$\mu_0 = 4\pi \times 10^{-7}~\mathrm{N/A^2}.$

Property Details

Location

The Magnetosphere property is located in the Magnetic Fields section at the end of the Composition tab in the object's properties panel. This property will only be visible for Planetary Body objects.

Units

Magnetosphere can be viewed and edited only in units of Radii, relative to the object's own radius.

Simulation Effects

The value of the Magnetosphere property will affect the size of the displayed magnetosphere when the Show Magnetosphere toggle is on. If the magnetosphere is smaller than the object itself (i.e., Magnetosphere is less than 1), the magnetosphere will not be visible.