91 Aquarii b, also known as HD 219449 b, is an

extrasolar planet An exoplanet or extrasolar planet is a planet outside the Solar System. The first possible evidence of an exoplanet was noted in 1917 but was not recognized as such. The first confirmation of detection occurred in 1992. A different planet, init ...

orbiting in the

91 Aquarii 91 Aquarii is the Flamsteed designation for a triple star system in the celestial equator, equatorial constellation of Aquarius (constellation), Aquarius. It also bears the Bayer designation Psi1 Aquarii (, ). It is visible to the naked e ...

system approximately 148

light-years A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 1012 ...

away in the constellation of

Aquarius Aquarius may refer to: Astrology * Aquarius (astrology), an astrological sign * Age of Aquarius, a time period in the cycle of astrological ages Astronomy * Aquarius (constellation) * Aquarius in Chinese astronomy Arts and entertainme ...

. It orbits at the average distance of 105 Gm from its star, which is slightly closer than Venus is to the sun (108 Gm). The planet takes half an Earth year to orbit around the star in a very circular orbit with eccentricity less than 0.053.

References

* Aquarius (constellation) Giant planets Exoplanets discovered in 2003 Exoplanets detected by radial velocity {{extrasolar-planet-stub

See also

References