500 registration points, created at the moment of mint and unknowable before it. The title comes from the operating room: fiducials are the fixed markers of stereotactic registration, the points that let a surgeon navigate to a target hidden inside the skull. Each plate here reads like evidence from that kind of instrument, cords pegged to nothing visible, figures mid-sequence, screens caught mid-read. The work never changes, but one circle on every plate keeps the real phase of the moon, so all 500 watch the sky together. Every marker holds more than it shows.