#astrometric

• Astrometric — Belonging to astrometry, relating to astrometry; referring to the precise geometric measurement of positions, angular distances, and proper motions of celestial bodies on the celestial sphere. This term defines the methods, coordinate catalogs, instruments (such as scanning telescopes), or satellite data (such as those provided by the Gaia mission) used to establish fundamental star charts.
• Astrometer — An astronomical measuring instrument used for the precise determination of angular positions, coordinates, and distances between celestial bodies in the night sky. Although historically the term defined filar micrometers or classic meridian circles used in astrometry, it can currently also designate the human specialists operating these complex mapping systems or automated scanning telescopes linked to sensor arrays.