Claim: 1293 Sonja was discovered by Eugène Joseph Delporte, a Belgian astronomer born in Genappe, at Uccle Observatory, on 26 September 1933.
Evidence: E. Delporte Eugène Joseph Delporte (10 January 1882 – 19 October 1955) was a Belgian astronomer born in Genappe. It was discovered on 26 September 1933, by Belgian astronomer Eugène Delporte at Uccle Observatory in Belgium.