When the axis of rotation does not pass through a body's center of mass, it can be calculated via Steiner's theorem, and it is obtained by mass density times the integral over the volume of the object the square of the distance from a point to the rotation axis with respect to volume.
Routh's rule is used to calculate this property for complex bodies, where the sum of the squares of the semimajor axes is divided by an arbitrary constant. When the axis of rotation does not pass through a body's center of mass, it can be calculated via Steiner's theorem, and it is obtained by mass density times the integral over the volume of the object the square of the distance from a point to the rotation axis with respect to volume. FTP, identify this rotational analog of mass which is commonly denoted by the letter I.
Routh's rule is used to calculate this property for complex bodies, where the sum of the squares of the semimajor axes is divided by an arbitrary constant.
mass {Moment} of {inertia}