Asteroid light curve inversion code by Kaasalainen and Durech from DAMIT website.

The source codes of light-curve inversion routines together with brief manuals, example lightc urves, and the code for the direct problem are available. The code was developed by Mikko Kaasalainen in Fortran and converted to C by Josef Durech. There are two programs for light-curve inversion: convexinv, that optimizes all parameters and uses spherical harmonics functions for shape representation, and conjgradinv, that optimizes only shape and uses directly facet areas as parameters – it should be used at the final stage of the inversion process for 'polishing' the final shape model. You can also compute synthetic light curves with lcgenerator.