Claim: The 1760 Sandra is a  35 kilometers in diameter, C-type stony asteroid discovered on 10 April 1950 by Ernest Johnson in Johannesburg Observatory that was named after Sandra Johnson.
Evidence: 1760 Sandra, provisional designation 1950 GB, is a carbonaceous asteroid from the outer regions of the asteroid belt, approximately 35 kilometers in diameter. Sandra is a carbonaceous C-type asteroid that orbits the Sun in the outer main-belt at a distance of 2.7–3.6 AU once every 5 years and 7 months (2,041 days). Johannesburg Obs. 10 April 1950 Ernest Johnson It was discovered on 10 April 1950, by South African astronomer Ernest Johnson at Union Observatory in Johannesburg, and named after his granddaughter Sandra.