1231 Auricula (prov. designation: 1931 TE2) is a carbonaceous background asteroid from the central regions of the asteroid belt, approximately 20 kilometers (12 miles) in diameter. It was discovered on 10 October 1931, by German astronomer Karl Reinmuth at the Heidelberg Observatory. The likely elongated C-type asteroid has a rotation period of 3.98 hours. It was named after the flowering plant auricula and indirectly honors astronomer Gustav Stracke.