HD 216770 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 216770 | |
| Constellation | Piscis Austrinus | |
| Right ascension | (α) | 22h 55m 53.7097s |
| Declination | (δ) | –26° 39′ 31.547″ |
| Distance | 123.5 ly (37.89 pc) | |
| Spectral type | K1V | |
| Orbital elements | ||
| Semi-major axis | (a) | 0.46 AU |
| Periastron | (q) | 0.29 AU |
| Apastron | (Q) | 0.63 AU |
| Eccentricity | (e) | 0.37 ± 0.06 |
| Orbital period | (P) | 118.45 ± 0.55 d (0.32429 y) |
| Orbital speed | (υ) | 42 km/s |
| Argument of periastron |
(ω) | 281 ± 10° |
| Time of periastron | (T0) | 2,452,672 ± 3.5 JD |
| Semi-amplitude | (K) | 30.9 ± 1.9 m/s |
| Physical characteristics | ||
| Mass | (m) | >0.65 MJ |
| Discovery information | ||
| Discovery date | June 30, 2003 | |
| Discoverer(s) | Mayor et al. | |
| Discovery method | Doppler spectroscopy | |
| Discovery site |  California, USA | |
| Discovery status | Published | |
HD 216770 b is an extrasolar planet orbiting the star HD 216770. It has a mass about two thirds that of Jupiter, largest planet in the Solar System. But unlike the gas giants in the Solar System, it orbits in a very eccentric orbit around the star. The mean distance from the star is slightly larger than Mercury's, and it completes one orbit around the star in every 118 days.[1]
See also
References
- ↑ Mayor, M.; et al. (2004). "The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE". Astronomy and Astrophysics 415 (1): 391–402. arXiv:astro-ph/0310316. Bibcode:2004A&A...415..391M. doi:10.1051/0004-6361:20034250.
External links
- "Notes for planet HD 216770 b". The Extrasolar Planets Encyclopaedia.
- "HD 216770". Exoplanets.
Coordinates: 
22h 55m 53.7097s, −26° 39′ 31.547″
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