15 Aquarii (HD 02753) is a blue-white main-sequence star of the B5V spectral classification located in the Aquarius constellation in the Sagittarius Arm of the Milky Way Galaxy, located at right ascension 21h 18m 11.07s and declination −04° 31′ 10.2″ at a galactic longitude of 47.0754. It was one of the Covenant core systems, and its planetary system contained a planet, Tamegue, that was a major Sangheili shipyard.