  The basic stellar atmospheric parameters (effective temperature, surface
gravity and global metallicity) were simultaneously determined for a sample of
233 stars, limited in magnitude ($V<15$) with spectral types between G0 and G3
and luminosity class V (main sequence). The analysis was based on spectroscopic
observations collected at the Observatorio Astrof\'isico Guillermo Haro and
using a set of Lick-like indices defined in the spectral range of 3800-4800
$\AA$. An extensive set of indices computed in a grid of theoretical spectra
was used as a comparison tool in order to determine the photospheric
parameters. The method was validated by matching the results from spectra of
the asteroids Vesta and Ceres with the Sun parameters. The main results were:
i) the photospheric parameters were determined for the first time for 213
objects in our sample; ii) a sample of 20 new super metal-rich stars candidates
was found.
