Named in memory of Gavriil Adrianovich Tikhov (1875–1960), active on the staff of the Pulkovo Observatory during 1906–1941 and from 1947 head of the astrobotanical department of the Kazakh Academy of Sciences. His principal scientific work was concerned with stellar and planetary photometry and colorimetry and with atmospheric optics. He was also known for his research on the physical nature of Mars. (M 5451) _ _.