HD 47186 b
Exoplanet | List of exoplanets | |
---|---|---|
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 | ||
Semi-major 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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