HD 47186 b

HD 47186 b

Exoplanet		List of exoplanets
Parent star
Star		HD 47186
Constellation		Canis Major
Right ascension	(α)	06^h 36^m 08.7880^s
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

1. 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: 06^h 36^m 08.7880^s, −27° 37′ 20.268″