Cartes du Ciel is a free planetarium program for Linux, Mac OS X and Windows. With the change to version 3, Linux has been added as a target platform, licensing has changed from freeware to GPL and the project moved to a new website. Read more
Ed ~ Need to update the asteroid database in the old version 2.76 ?
In the Cartes du Ciel folder is a file called EXTRES.INI This file contains the addresses where the program searches for files to update your data.
Open EXTRES.INI with Notepad and look for the section CBAT_comets and replace the lines with the following URL and INFO: url=http://www.minorplanetcenter.org/iau/Ephemerides/Comets/Soft06Cmt.txt info=http://www.minorplanetcenter.org/iau/Ephemerides/EphemOrbEls.html
The next section is the place where the lines CBAT_asteroids URL URL2 and INFO with the following: url=http://www.minorplanetcenter.org/iau/Ephemerides/Bright/$$$$/Soft06Bright.txt url2=http://www.minorplanetcenter.org/iau/Ephemerides/Unusual/Soft06Unusual.txt info=http://www.minorplanetcenter.org/iau/Ephemerides/EphemOrbEls.html