Cerberus (1865): Cerberus was found in 1971 and is an Apollo asteroid. In Greek mythology, Cerberus is the multi-headed dog that guards the gates of the underworld. In astrology, Cerberus symbolizes themes of protection, boundaries, and the shadow self. Its placement in a chart may indicate areas where individuals confront their fears, establish boundaries, or delve into the depths of their subconscious mind for transformation and healing.