Histogram of the luminosity classes of the LRa01 star field as derived from Exo-Dat (Deleuil et al. 2009). The majority of the target stars (~50%) are main-sequence dwarf stars (luminosity class V). Subgiant (luminosity class IV), giant (luminosity class III), bright giant (luminosity class II), and supergiant stars (luminosity class I) make up  ~31.5%,  ~15%,  ~3%, and  ~0.50% of the total, respectively.