Discovery | |
---|---|
Discovered by | C.G. Tinney, Butler, Marcy et al.[1] |
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) |
HD 117618 b, named Noifasui by the IAU,[2] 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.[1][3]