Pollux b
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| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | Pollux | |
| Constellation | Gemini | |
| Right ascension | (α) | 07h 45m 19.4s |
| Declination | (δ) | +28° 01′ 35″ |
| Distance | 33.7 ly (10.34 pc) | |
| Spectral type | K0 IIIb | |
| Orbital elements | ||
| Semimajor axis | (a) | 1.64±0.27 AU |
| Eccentricity | (e) | 0.02±0.03 |
| Orbital period | (P) | 589.64±0.81 d |
| Angular distance | (θ) | 163.443 mas |
| Time of periastron | (T0) | 2,447,739.02±4.5 JD |
| Semi-amplitude | (K) | 41.0±1.6 m/s |
| Physical characteristics | ||
| Mass | (m) | >2.3±0.45 MJ |
| Discovery information | ||
| Discovery date | June 16, 2006 | |
| Discoverer(s) | Hatzes et al. | |
| Detection method | Radial velocity | |
| Discovery status | Published | |
Pollux b is a Jupiter-like extrasolar planet orbiting Pollux. The planet has a comparable mass to the gas giants in our solar system. It moves around Pollux in 1.7 years at a distance of 1.7 AU in a nearly circular orbit. This planet was originally suspected in 1993, and it wasn't published until June 16, 2006.
[edit] References
- Hatzes et al. (1993). "Long-period radial velocity variations in three K giants". The Astrophysical Journal 413: 339–348. doi:.
- Hatzes et al. (2006). "Confirmation of the planet hypothesis for the long-period radial velocity variations of β Geminorum". Astronomy and Astrophysics 457: 335–341. doi:.
- Reffert et al. (2006). "Precise Radial Velocities of Giant Stars. II. Pollux and Its Planetary Companion". The Astrophysical Journal 652 (1): 661 – 665. doi:.
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