Аннотация:The results of four years of UBVRJHK photometric measurements of the object TX CVn over a wide region of the spectrum, from 0.36-2.2 microns, are presented. In the optical region, the star has been fading and simultaneously becoming redder: the amplitude of the light variation has been roughly 0.6 m in U and 0.2 m in R. In the spring of 1979 the near-infrared emission was highly unstable, with the brightness fluctuations on successive nights reaching about 0.4 m. Comparison of color indices against normal indices shows that, beginning with the R band at 0.7 microns, the radiation of TX CVn comes chiefly from the cool component. To within + or - 1 subtype, in 1981 the radiation of the system was that of a normal K5 giant and a B9 main sequence star. The rest of the time excess optical emission was present, probably coming from a hot spot. The K-band flux density of the K5 giant implies a distance to TX CVn of about 1.1 kpc.