91 Aquarii b
Artist's conception of planet orbiting Psi1 Aquarii
|Discovered by||Mitchell et al.|
|Discovery site||United States|
|Discovery date||16 November 2003|
|0.7 AU (100,000,000 km)|
|Eccentricity||0.027 ± 0.026|
|181.4 ± 0.1 d|
|April 11, 2005|
2453472.1 ± 24
|177.3 ± 0.8|
|Semi-amplitude||91.0 ± 2.3|
91 Aquarii b, also known as HD 219449 b, is an extrasolar planet orbiting in the 91 Aquarii system approximately 148 light-years away in the constellation of Aquarius. 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.
- Mitchell, D.; Frink, S.; Quirrenbach, A.; Fischer, D.; Marcy, G.; Butler, P. (2003). "Four Substellar Companions Found Around Nearby K Giant Stars". Bulletin of the American Astronomical Society. 35: 1234. Bibcode:2003AAS...203.1703M.
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