Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Lambda Aquarii is a star in the constellation Aquarius. It has the obscure traditional names Hydor and Ekkhysis, from the ancient Greek. In Chinese, L i Bì Zhèn, meaning Line of Ramparts, refers to an asterism. Lambda Aquarii is a M-type red giant with a mean apparent magnitude of +3.73. It is approximately 392 light-years from Earth. It is classified as an irregular variable star and its brightness varies from magnitude +3.70 to +3.80.