CREATE TABLE table_23086 ("Rnd" FLOAT, "Circuit" TEXT, "LMP1 Winning Team" TEXT, "LMP2 Winning Team" TEXT, "GT2 Winning Team" TEXT, "Challenge Winning Team" TEXT, "Results" TEXT)

Name the circuit for #47 orbit racing
SELECT "Circuit" FROM table_23086 WHERE "Challenge Winning Team" = '#47 Orbit Racing'
SELECT "Circuit" FROM "table_23086" WHERE "Challenge Winning Team" = '#47 Orbit Racing'