HD 117618 b
HD 117618 b, named Noifasui by the IAU, is an exoplanet discovered orbiting the star HD 117618 in September 2004. The planet is a small gas giant less than a fifth the mass of Jupiter. It orbits close to its star in a very eccentric orbit.
| Discovery | |
|---|---|
| Discovered by | C.G. Tinney, Butler, Marcy et al. |
| Discovery site | Anglo-Australian Observatory |
| Discovery date | 16 September 2004 |
| Radial velocity | |
| Orbital characteristics | |
| Apastron | 0.250 AU (37,400,000 km) |
| Periastron | 0.102 AU (15,300,000 km) |
| 0.176 ± 0.010 AU (26,300,000 ± 1,500,000 km) | |
| Eccentricity | 0.42 ± 0.17 |
| 25.827 ± 0.019 d 0.070709 y | |
Average orbital speed | 74.4 |
| 2,450,832.2 ± 1.8 | |
| 254 ± 19 | |
| Semi-amplitude | 12.8 ± 2.2 |
| Star | HD 117618 |
| Physical characteristics | |
| Mass | >0.178 ± 0.021 MJ (>56.5 ME) |
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