M4AST (Modelling for Asteroids) is a free on-line tool for modeling visible and near-ir spectra of atmosphereless bodies.

M4AST allows to model temporary (on-the-fly) anonymous file submission.

M4AST proposes several routines for spectral analysis:
- plotting the data;
- merging spectra;
- taxonomy comparison;
- comparison to laboratory measurements(RELAB database);
- de-reddening of spectra and comparison.

M4AST interface was tested under Google Chrome, Firefox 3.6, Internet Explorer 9, Konqueror, and Opera browsers.

If you use M4AST tools in your work then please cite:
"Spectral properties of eight near-Earth asteroids", Astronomy and Astrophysics, Volume 535, bibliographic code here.

Authors: Marcel Popescu, Mirel Birlan.