The well-known binary star in the Aquarius constellation. The two almost equally bright components with magnitudes of 4.3 and 4.5 have a period of mutual orbit determined to be 856 years. In 1967, the stars were only 1.7" apart, but since then their separation has slowly increased. In 1985, it was 1.8", but at the beginning of the third millennium, we perceive them as a yellow to white pair, approximately two arc seconds wide, easily distinguishable even with a small telescope with a 5cm objective diameter. In the year 2160, their separation will increase to 6". The system is located 92 light-years away.