Psi3 Aquarii
Psi3 Aquarii is a visual binary star system in the constellation of Aquarius. Its name is a Bayer designation that is Latinized from ψ3 Aquarii, and abbreviated Psi3 Aqr or ψ3 Aqr. The pair have an apparent visual magnitude of 4.98, which is bright enough to be seen with the naked eye. Parallax measurements give a distance estimate of roughly, but it is drifting closer with a radial velocity of −10 km/s.
The main component of this system is an A-type [main sequence star] with a stellar classification of A0 V. It has 2.7 times the mass and double the radius of the Sun. The star is radiating 73 times as much luminosity as the Sun from its photosphere at an effective temperature of 9,931 K. It is around 284 million years old and has a high rate of spin with a projected rotational velocity of 144 km/s.
Its companion is an 9th magnitude star at an angular separation of 1.5 arcseconds from the primary. This system is an X-ray source with a luminosity of. This radiation most likely comes from the companion star.