#OTD in 1892.
Amalthea becomes the last moon to be discovered without the use of photography. It was discovered by Edward Emerson Barnard and named it after Amalthea, fost-mother of Zeus.
Barnard used the 91 cm refractor telescope at Lick Observatory and was the first new satellite of Jupiter since Galileo Galilei's discovery of the Galilean satellites in 1610.