Astronomy:HD 47186 b

Short description: Hot Neptune extrasolar planet in the constellation of Canis Major

HD 47186 b

Discovery
Discovered by	Bouchy et al.
Discovery site	La Silla Observatory
Discovery date	June 16, 2008
Detection method	Doppler spectroscopy
Orbital characteristics
astron|astron|helion}}	0.052 AU (7,800,000 km)
astron|astron|helion}}	0.048 AU (7,200,000 km)
Semi-major axis	0.050 AU (7,500,000 km)
Eccentricity	0.038 ± 0.02
Orbital period	4.0845 ± 0.0002 d
Average Orbital speed	130
astron|astron|helion}}	2,454,562.77 ± 0.08
Star	HD 47186

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.

External links

• "HD 47186 b". Exoplanets. http://media4.obspm.fr/exoplanets/base/planete.php?etoile=HD+47186&planete=b.