91 Aquarii [SEP] constellation
91 Aquarii
91 Aquarii is the Flamsteed designation for a triple star system in the equatorial constellation of Aquarius. It also bears the Bayer designation Psi Aquarii (, ). It is visible to the naked eye with an apparent visual magnitude of +4.248. Parallax measurements yield an estimated distance of around from Earth. An extrasolar planet is known to orbit the main star.
Stellar system.
91 Aquarii is a triple star system. The primary component, 91 Aqr A, is a giant star with a stellar classification of
HD 10647 b
HD 10647 b, also catalogued as q Eridani b, is an extrasolar planet approximately 57 light-years away in the constellation of Eridanus (the River). The planet is a mid-Jovian that orbits 103% farther from the star than Earth to the Sun. It takes about 33 months to orbit with semi-amplitude of 17.9 m/s.
See also.
- 51 Pegasi b
- 91 Aquarii b
- 109 Piscium b
- Epsilon Eridani b