Astrographic Catalog

Astrographic Catalog

(ass-trŏ-graf -ik) See Carte du Ciel.
References in periodicals archive ?
Many of the stars are in the SAO Star Catalog; others are identified by their numbers in the Astrographic Catalog -- Tycho (ACT), Tycho Reference Catalog (TRC), Positions and Proper Motions (PPM), Twin Astrographic Catalog (TAC), or Hubble Guide Star Catalog (GSC).
This catalog is known as the Astrographic Catalog Reference Stars, or ACRS.
Naval Observatory's new ACT catalog, which combines Hipparcos data with old Astrographic Catalog data to refine the stars' proper motions across the sky.