Substellar Companion?
Okayama Planet Search team published a paper in late 2008 reporting investigations on radial velocity variations observed for a set of evolved stars, showing possible hints of a substellar companion orbiting Psi1 Draconis A, primary component of the binary system. Probably a brown dwarf, the unseen substellar companion would yield a minimum mass 50 times that of Jupiter and an orbital period of 8.77 years. The unseen companion is still putative, not yet confirmed.
| Companion |
Mass | Semimajor axis |
Orbital period |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥50 MJ | ≈4.7 | 3200 | ? | — | — |
Read more about this topic: Psi Draconis