32 Aquarii
Binary star system in the constellation Aquarius
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32 Aquarii is a binary star system in the zodiac constellation of Aquarius. 32 Aquarii is its Flamsteed designation. It is visible to the naked eye as a dim, white-hued star with an apparent visual magnitude of 5.29.[1] This system is moving away from the Earth with a heliocentric radial velocity of +19 km/s,[1] and is a possible member of the corona of the Ursa Major flow.[11]
This is a single-lined spectroscopic binary with an (assumed) circular orbit having a period of only 7.8 days. It has an a sin i value of 0.777 Gm (0.00519 AU),[7] where a is the semimajor axis and i is the orbital inclination. Since the sine function can be no larger than one, this provides a lower bound on the true semimajor axis of their orbit.
The primary component is a metallic-line (Am) star[7] with the calcium K line of an A3 star, the hydrogen lines of an F1 star, and the metal lines of an F2 star.[5] It is a sharp-lined, slowly rotating star[12] with a projected rotational velocity of 9.6 km/s[7] and is about 465 million years old.[8] The star has 1.69[8] times the mass of the Sun and three[2] times the Sun's radius. It is radiating 29[2] times the luminosity of the Sun from its photosphere at an effective temperature of 7,976 K.[8]