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HD 47186 b is a short-period “hot Neptune” extrasolar planet orbiting the nearby G-type star HD 47186 in the constellation Canis Major, at a distance of approximately 123 ly (38 pc) from Earth. With a minimum mass of about 22.8 M⊕, it belongs to the population of low-mass, close-in planets identified by high-precision radial velocity surveys of bright stars. The planet orbits at a distance of roughly 0.05 au (7,500,000 km; 4,600,000 mi) and completes one revolution in 4.0845 days. Its orbit is nearly circular, with an eccentricity of about 0.04.[1]
| Discovery | |
|---|---|
| Discovered by | Bouchy et al. |
| Discovery site |  La Silla Observatory |
| Discovery date | June 16, 2008 |
| Doppler spectroscopy | |
| Orbital characteristics | |
| Apastron | 0.052 AU (7,800,000 km) |
| Periastron | 0.048 AU (7,200,000 km) |
| 0.050 AU (7,500,000 km) | |
| Eccentricity | 0.038 ± 0.02 |
| 4.0845 ± 0.0002 d | |
Average orbital speed | 130 |
| 2,454,562.77 ± 0.08 | |
| Star | HD 47186 |
References
edit- ↑ Lovis, C.; Mayor, M.; Bouchy, F.; Pepe, F.; Queloz, D.; Udry, S.; Benz, Willy; Mordasini, Christoph (2008). "Towards the characterization of the hot Neptune/super-Earth population around nearby bright stars". Proceedings of the International Astronomical Union. 4 (S253): 502–505. doi:10.1017/S1743921308026513.
External links
edit- "HD 47186 b". Exoplanets. Archived from the original on 2012-03-04. Retrieved 2008-11-09.
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