It was discovered by Austrian astronomer Johann Palisa at the Vienna Observatory on 4 September 1891.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: It was discovered by Austrian astronomer Johann Palisa at the Vienna Observatory on 4 September 1891. ### Response: .