HD 47186 b
Encyclopedia
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
.
Hot Neptune
A hot Neptune is an extrasolar planet in an orbit close to its star , with a mass similar to that of Uranus or Neptune. Recent observations have revealed a larger potential population of hot Neptunes than previously thought...
” extrasolar planet
Extrasolar planet
An extrasolar planet, or exoplanet, is a planet outside the Solar System. A total of such planets have been identified as of . It is now known that a substantial fraction of stars have planets, including perhaps half of all Sun-like stars...
located approximately 123 light years away in the constellation
Constellation
In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....
of Canis Major
Canis Major
Canis Major is one of the 88 modern constellations, and was included in the 2nd-century astronomer Ptolemy's 48 constellations. Its name is Latin for 'greater dog', and is commonly represented as one of the dogs following Orion the hunter...
, orbiting the star
Star
A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...
HD 47186
HD 47186
HD 47186 is a star located approximately 129 light-years away in the constellation of Canis Major. It is a G6V star with the characteristics very similar to the Sun, but it is 1.7 times more metal-rich. In 2008, two extrasolar planets were discovered orbiting the star.- Planetary system :Announced...
. This planet has a minimum mass
Minimum mass
In astronomy, minimum mass is the lower-bound calculated mass of observed objects such as planets, stars and binary systems, nebulae, and black holes. Minimum mass is a widely cited statistic for extrasolar planets...
of 22.78 times that of Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...
and orbits very close to the star at a similar distance from the star as 51 Pegasi b
51 Pegasi b
51 Pegasi b , sometimes though unofficially named Bellerophon, is an extrasolar planet approximately 50 light-years away in the constellation of Pegasus...
is from 51 Pegasi
51 Pegasi
51 Pegasi is a Sun-like star located 15.6 parsecs from Earth in the constellation Pegasus...
. As in consequence, it takes 4.0845 days to complete an orbit with an eccentricity
Orbital eccentricity
The orbital eccentricity of an astronomical body is the amount by which its orbit deviates from a perfect circle, where 0 is perfectly circular, and 1.0 is a parabola, and no longer a closed orbit...
of 0.038, which is similar to the 5.66 year-period planet HD 70642 b
HD 70642 b
HD 70642 b is an extrasolar planet orbiting the star HD 70642 at 3.23 AU distance and takes 5.66 years to revolve. This planet may have systems of moons like Jupiter. This planet was discovered on July 3, 2003.-External links:*...
.