91 Aquarii b
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| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | 91 Aquarii A | |
| Constellation | Aquarius | |
| Right ascension | (α) | 23h 15m 53.5s |
| Declination | (δ) | −9° 05′ 16″ |
| Distance | 148 ly (46 pc) | |
| Spectral type | K0III | |
| Orbital elements | ||
| Semimajor axis | (a) | 0.324 AU |
| Eccentricity | (e) | 0.003 |
| Orbital period | (P) | 181.84 d |
| Angular distance | (θ) | 7.129 mas |
| Longitude of periastron |
(ω) | 129.57° |
| Time of periastron | (T0) | 2,454,478.1 JD |
| Semi-amplitude | (K) | 97.3 m/s |
| Physical characteristics | ||
| Mass | (m) | >2.942 MJ |
| Discovery information | ||
| Discovery date | 16 November 2003 | |
| Discoverer(s) | Mitchell et al. | |
| Detection method | Radial velocity | |
| Discovery site |  United States |
|
| Discovery status | Published | |
| Other designations | ||
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Psi1 Aquarii b, HD 219449 b
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91 Aquarii b, also known as Psi1 Aquarii b, is an extrasolar planet orbiting in the 91 Aquarii system approximately 148 light-years away in the constellation of Aquarius. 91 Aquarii b is a hot Jupiter with mass nearly three times that of Jupiter. It orbits at the average distance of 48.5 Gm from its star, which is closer than Mercury is to the Sun (57.9 Gm). The planet takes half a year to revolve around the star in a very circular orbit (e=0.003).
[edit] See also
[edit] References
- Mitchell D., Frink S., Quirrenbach A., Fischer D., Marcy G. & Butler P. (2003). "Four Substellar Companions Found Around Nearby K Giant Stars".
[edit] External links
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