Tags: Star.
101 Aquarii or b3 Aquarii (101 Aqr) is the Flamsteed designation for a binary star in the equatorial constellation of Aquarius. The combined apparent visual magnitude of the pair is 4.71 which is bright enough to be seen with the naked eye from the suburbs. The distance of this star from Earth is estimated as 290 light-years (89 parsecs) based upon parallax measurements.The brighter member of this system has an apparent magnitude of 4.81.
