National Astronomical Observatory of Japan
The Tokyo Photoelectric Meridian Circle is a fully automated photoelectric meridian circle at the Mitaka campus of the National Astronomical Observatory of Japan (formerly of the Tokyo Astronomical Observatory) in Tokyo, Japan. It was manufactured by Carl Zeiss Oberkochen, Germany, and installed in Mitaka in 1982. The telescope is equipped with a double-slit photoelectric micrometer, a photomultiplier with a photon counting device, and a set of filters.