| Orbital elements | ||
|---|---|---|
| Semimajor axis | (a) | 0.46 AU |
| Eccentricity | (e) | 0.55 |
| Orbital period | (P) | 108.55 d |
| Argument of periastron |
(ω) | 55.2° |
| Time of periastron | (T0) | 2,451,189.3 JD |
| Semi-amplitude | (K) | 1398.5 m/s |
| Physical characteristics | ||
| Mass | (m) | >46 MJ |
| Radius | (r) | >1.4 RJ |
| Discovery information | ||
| Discovery date | 2001 | |
| Discoverer(s) | Tinney et al. | |
| Detection method | Doppler Spectroscopy | |
| Discovery site | Australia | |
| Discovery status | Published | |
HD 164427 b is a brown dwarf with a minimum mass of 46 times that of Jupiter. It orbits at nearly half an astronomical unit or Earth-to-Sun distance away from its star (HD 164427). The angular separation between a brown dwarf and a yellow dwarf as viewed from Earth is 11.76 Milliarcseconds. It takes 108.55 Earth days to orbit eccentrically around HD 164427. It has a very high semi-amplitude of almost 1400 m/s, because this is a very massive object which exerts strong gravitational pull on its tugging star.
Read more about this topic: HD 164427