Xi Aquarii [SEP] constellation
Xi Aquarii
Xi Aquarii (ξ Aquarii, abbreviated Xi Aqr, ξ Aqr) is a binary star system in the equatorial constellation of Aquarius. It is visible to the naked eye with an apparent visual magnitude of 4.7. Based upon parallax measurements made during the Hipparcos mission, this system lies at a distance of around from the Sun.
The two components are designated Xi Aquarii A (also named Bunda) and B.
Nomenclature.
"ξ Aquarii" (Latinised to "Xi Aquarii") is the binary
(), "the Luck of Lucks".
In Chinese, (), meaning "Celestial Ramparts", refers to an asterism consisting of Xi Aquarii, 46 Capricorni, 47 Capricorni, Lambda Capricorni, 50 Capricorni, 18 Aquarii, 29 Capricorni, 9 Aquarii, 8 Aquarii, Nu Aquarii, 14 Aquarii, 17 Aquarii and 19 Aquarii. Consequently, the Chinese name for Xi Aquarii itself is (, ).
Properties.
Xi Aquarii is a single-lined spectroscopic binary system, which means