HD 47186 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
.jpg) | ||
| Parent star | ||
| Star | HD 47186 | |
| Constellation | Canis Major | |
| Right ascension | (α) | 06h 36m 08.7880s |
| Declination | (δ) | −27° 37′ 20.268″ |
| Apparent magnitude | (mV) | 7.8 |
| Distance | 123.4 ly (37.8 pc) | |
| Spectral type | G6V | |
| Mass | (m) | 0.99 M☉ |
| Temperature | (T) | 5675 ± 21 K |
| Metallicity | [Fe/H] | 0.23 ± 0.02 |
| Orbital elements | ||
| Semimajor axis | (a) | 0.050 AU |
| Periastron | (q) | 0.048 AU |
| Apastron | (Q) | 0.052 AU |
| Eccentricity | (e) | 0.038 ± 0.02 |
| Orbital period | (P) | 4.0845 ± 0.0002 d |
| Orbital speed | (υ) | 130 km/s |
| Time of periastron | (T0) | 2,454,562.77 ± 0.08 JD |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 0.07167 MJ (22.78 M⊕) |
| Discovery information | ||
| Discovery date | June 16, 2008 | |
| Discoverer(s) | Bouchy et al. | |
| Discovery method | Doppler spectroscopy | |
| Discovery site |  La Silla Observatory | |
| Discovery status | Published[1] | |
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 47186 b is a “hot Neptune” extrasolar planet located approximately 123 light years away in the constellation of Canis Major, orbiting the star HD 47186. This planet has a minimum mass of 22.78 times that of Earth and orbits very close to the star at a similar distance from the star as 51 Pegasi b is from 51 Pegasi. As in consequence, it takes 4.0845 days to complete an orbit with an eccentricity of 0.038, which is similar to the 5.66 year-period planet HD 70642 b.
References
- ↑ Bouchy, F. et al. (2009). "The HARPS search for southern extra-solar planets. XVII. Super-Earth and Neptune-mass planets in multiple planet systems HD 47186 and HD 181433". Astronomy and Astrophysics 496 (2): 527–531. arXiv:0812.1608. Bibcode:2009A&A...496..527B. doi:10.1051/0004-6361:200810669.
External links
- "HD 47186 b". Exoplanets.
Coordinates: 
06h 36m 08.7880s, −27° 37′ 20.268″
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