SAO Star Catalog — An Etymological Dictionary of Astronomy and Astrophysics

SAO Star Catalog

کاتالوگ ِ ستاره‌ای ِ SAO

kâtâlog-e setâre-yi-ye SAO

Fr.: catalogue SAO

A general whole-sky catalog compiled by the Smithsonian Astrophysical Observatory which results from the combination of several earlier catalogs.
The compilation gives positions and proper motions for 258,997 stars, of which 8,712 are double and 499 variable, with an average distribution of 6 stars per square degree. The star positions have an average standard deviation of 0’’.2 at their original epochs (0’’.5 at epoch 1963.5). The equinox is 1950.0 and the system that of the FK4.

Etymology (EN): SAO acrynome of the Smithsonian Astrophysical Observatory;
→ star; → catalog.

An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک