Alekseyev I. The photometric research of the red dwarf stars spottedness

The UBVRI photometric observations of 16 stars of different spectral classes were carried out during 8 years. A half of them are insufficiently explored. For all stars the BY Dra type variability is confirmed, the rotation modulation and long term light curves are constructed and the unspotted photosphere brightness is estimated. A zonal spottedness model developed and gives the spottedness picture similar the solar one. The spottedness models for 24 active dwarfs are constructed. The tendency is found: starspots concentrated near the stellar equator on cool stars and near the middle latitudes on solar-type stars. The cooler stars have cooler starspots. Spotted regions may occupy up to a half of the stellar surface.