Mentioned in

References in periodicals archive

Many of the stars have SAO designations from the Smithsonian Astrophysical Observatory Star Catalog; others are identified by ZC (Zodiacal Catalogue), TYC (Tycho-2), PPM (Positions and Proper Motions), or TAC (Twin Astrographic Catalog) numbers.

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).

Planetary Occultations for 2000 : No other technique in the arsenal of modern astronomers has been so prolific for gauging the sizes and shapes of asteroids

This catalog is known as the Astrographic Catalog Reference Stars, or ACRS.

The astrographic catalogue: a century of work pays off

All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.