  We present preliminary results on a study based on contemporaneous
photometric and spectroscopic observations of the young K0-1V star SAO 51891.
We find that SAO 51891, a possible member of the Local Association, shows
emission cores in the CaII H&K and fillings in the Halpha and CaII Infra-Red
Triplet (IRT) lines. Moreover, we detect absorption lines of HeI-D3 and LiI and
measure a v sini of 19 km/s. A clear rotational modulation of both the light
and the photospheric temperature, due to photospheric spots, has been detected.
The net Halpha chromospheric emission does not show any detectable variation,
while the CaII IRT emission displays a fair modulation.
