91 Aquarii b
Extrasolar planet
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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 million km from its star, which is slightly closer than Venus is to the Sun (108 million km). The planet takes half an Earth year to orbit around the star in a very circular orbit with eccentricity less than 0.053.
DiscoveredbyMitchell et al.
Discoverydate16 November 2013
Artist's conception of planet orbiting ψ1 Aquarii | |
| Discovery | |
|---|---|
| Discovered by | Mitchell et al. |
| Discovery site |  United States |
| Discovery date | 16 November 2013 |
| Radial velocity | |
| Orbital characteristics | |
| 0.7 AU (100 million km) | |
| Eccentricity | 0.027 ± 0.026 |
| 181.4 ± 0.1 d | |
| 11 April 2005 2,453,472.1 ± 24 | |
| 177.3 ± 0.8 | |
| Semi-amplitude | 91.0 ± 2.3 |
| Star | 91 Aquarii |
See also
References
- 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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