sty2 Tycho-2 Reference Catalog Search Program

By default, only the brightest 100 objects (or closest 100, if the -s p option is used) are returned. Use the -n option to increase this number.

Output is to standard out, unless the -w flag is set, in which case it goes to objectname.tycho2 or search.tycho2.

The Tycho-2 number is the Guide Star region from 0001-9537) followed by the sequence number of the star within the region.

Set the environment variable TY2_PATH to the directory containing the CDROM. If the environment variable is not set, the default is to look at /data/astrocat/tycho2.

If you want to find the Tycho-2 stars in the area covered by an image with a world coordinate system in its header, try imty2,

Command Line Arguments

CGI Queries and Parameters

As of version 2.8.6, sty2 can be used remotely as a CGI executable.

Examples

Search with results to standard output
Search with results to a file
Find closest star
Find stars by number
Match stars in input catalog

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Last updated 6 July 2007 by Doug Mink