2240 Tsai (1978 YA) is a main-belt asteroid. It is named after the Taiwanese astronomer Tsai Changhsien (Traditional Chinese:蔡章獻, 1924–2009).
2240 Tsai (1978 YA) is a main-belt asteroid. It is named after the Taiwanese astronomer Tsai Changhsien (Traditional Chinese:蔡章獻, 1924–2009).