The son born to Surya with the wife of Sutapas. As per the Brahmavairtakapurana, once when Sutapas’ wife was on a pilgrimage, Surya saw her and took her by force when she didn’t agree to fulfill his desire. Ashwinisuta was born thus. She returned from the pilgrimage with her son and told Sutapas what had happened. The sage threw them both out. Surya taught Ashwinisuta and made him a good astrologer. But Sutapas cursed Ashwinisuta to become sick, but said he would be released from the curse whenever he prayed to Surya.