HD 129445 b is an eccentric Jupiter gas giant exoplanet orbiting the star HD 129445 which was discovered by the Magellan Planet Search Program in 2010.[1] Its mass is 1.6 times Jupiter's, and it takes 5 years to complete one orbit around HD 129445, a G-type star approximately 210 light years away.[2][3]
| Discovery | |
|---|---|
| Discovered by | Arriagada et al.[1] |
| Discovery site | Las Campanas Observatory |
| Discovery date | January 26, 2010 |
Detection method | Doppler spectroscopy |
| Orbital characteristics | |
| Apastron | 5.0 AU (750,000,000 km) |
| Periastron | 0.9 AU (130,000,000 km) |
Semi-major axis | 2.9 ± 0.2 AU (434,000,000 ± 30,000,000 km) |
| Eccentricity | 0.70 ± 0.10 |
Orbital period (sidereal) | 1840 ± 55 d 5.04 y |
Average orbital speed | 17 |
Time of periastron | 24553093 ± 50 |
Argument of periastron | 163 ± 15 |
| Semi-amplitude | 38 ± 6 |
| Star | HD 129445 |
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