Omega1 Aquarii, Latinized from ω1 Aquarii, is the Bayer designation for a binary star in the equatorial constellation of Aquarius. With an apparent visual magnitude of 4.96, this star is faintly visible to the naked eye from the suburbs. The distance to this star can be estimated from the parallax as approximately 138 ly. The stellar classification of this star is A7 IV, matching a subgiant star. It is spinning rapidly with a projected rotational velocity of 105 km/s. The star is about 600 million years old and is radiating 15 times the Sun's luminosity. It has 1.9 times the mass of the Sun and 2.4 times the Sun's radius. Previously thought to be a single star, in 2022 it was discovered to have a smaller companion, making it a binary star. The secondary star has a projected separation of about 1 astronomical unit away from the primary star.