Wireless active tracking fiducials

A fiducial marker to be tracked by a surgical navigation system. The fiducial marker is to be affixed to an object during a surgical procedure. The fiducial marker including a casing for attachment to the object; a light emitting component attached to the casing; a power source within the casing; a signal receiver to receive a signal from the surgical navigation system; and control logic to control the light emitting component in response to the signal from the surgical navigation system. The object to-be-tracked may include a plurality of the fiducial markers arranged in geometric pattern, and the markers may include a first active fiducial marker having a first light emitting component that emits light having a first spectral bandwidth, and a second active fiducial marker having a second light emitting component that emits light having a second spectral bandwidth different from the first spectral bandwidth.