1711 Sandrine was discovered in 1935 by E. Delporte in an observatory in Belgium; it's orbital period if five point twenty three years.
E. Delporte Uccle Obs. 5.23 yr (1,910 days) The Royal Observatory of Belgium (French: Observatoire Royal de Belgique, Dutch: Koninklijke Sterrenwacht van Belgie), has been situated in the Uccle municipality of Brussels (Belgium) since 1890. 
