Hipparcos Catalog

I have converted the Hipparcos catalog J2000 coordinates and provided simplified versions in JSON format. Several files are available, each limited to a specific magnitude. You only need one file, not every file up to a specific magnitude. E.g. the hipparcos_6.5.js file contains all stars up to mag 6.5. The files are available at gmiller123456/hip2000.

The Hipparcos catalog is probably the most common among amateurs. It contains over 100,000 stars down to magnitude 13, which is good enough for a lot of work. It is often combined with the Tycho 2 catalog, and often with others linked below.

You may also use the VISIER system, which some of the links below point to. With it, you can limit the fields to just the ones you need, and also produce J2000 RA/DEC coordinates (most catalogs are in "of date" coordinates based on when they were produced).

• gmiller123456/hip2000 The Hipparcos catalog in JSON format with a reduced number of fields, and broken out by magnitude.
• Hipparcos The full original Hipparcos catalog. 52Mb and 118k stars
• Tycho 2 Probably the second most common catalog used among amateurs. 160Mb compressed, Contains 250k stars
• SAO A fairly old catalog, not commonly used on its own anymore, but you will still find a lot of references to SAO numbers for stars. 51Mb, about 250k stars.
• UCAC 4 Over 100M stars, about 25Gb.
• GAIA There are currently 3 versions of this, version 1 is about 200Gb, and version 3 about 500Gb.
• Washington Double Star Catalog Commonly used with catalogs above to identify which stars are double stars. About 1.5Gb.
• HYG Database Compilation of Hipparchos, Yale, and Gliese catalogs in a reduced format