Catalogues of Fundamental Stars

[1] The Neuer Fundamentalkatalog (NFK) was compiled by J. Peters and contained 925 stars.

[1] The Fourth Fundamental Catalogue (FK4) was published in 1963, and contained 1,535 stars in various equinoxes from 1950.0.

The Fourth Fundamental Catalogue's Supplement (FK4S) was an amendment to FK4 that contains a further 1,987 stars.

It was superseded by the quasar-based International Celestial Reference Frame (ICRF).

The Sixth Fundamental Catalogue (FK6) is a 2000 update of FK5 correlated with the ICRF through the Hipparcos satellite.