Astrometry.net Tycho-2 index files (44'-60')

 The astrometry engine will take any image and return the astrometry
 world coordinate system (WCS), a standards-based description of the
 transformation between image coordinates and sky coordinates.
 .
 This package installs the 4109 index file from the Tycho-2 catalog
 containing skymarks of sizes 44 arcminutes to 60 arcminutes.