Detection of the lowest mass ratio contact binary in the universe: TYC 3801-1529-1 Kai Li, Xiang Gao, Di-Fu Guo, Dong-Yang Gao, Xu Chen, Li-Heng Wang, Yu-Xin Xin, Yu-Xin Han, Chun-Hwey Kim and Min-Ji Jeong A&A, 692 (2024) L4 Published online: 04 December 2024 DOI: 10.1051/0004-6361/202451947