HD 11964 c
Encyclopedia
HD 11964 b is an extrasolar planet
, a gas giant like Jupiter
approximately 107 light-year
s away in the constellation
of Cetus
. The planet orbits the yellow subgiant star
HD 11964
in a nearly-circular orbit, taking over 5 years to complete a revolution around the star at a distance of 3.34 astronomical unit
s.
The planet was discovered in 2005 and published as part of the Catalog of Nearby Exoplanets under the designation HD 11964 b. However since that time there has been confusion as to the designations of the planets in the HD 11964 system, leading to some sources designating this planet as "HD 11964 c
". In a recent review of the properties of multi-planet extrasolar planetary system
s, the discovery team has stated that the correct designation for this planet is HD 11964 b.
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...
, a gas giant like Jupiter
Jupiter
Jupiter is the fifth planet from the Sun and the largest planet within the Solar System. It is a gas giant with mass one-thousandth that of the Sun but is two and a half times the mass of all the other planets in our Solar System combined. Jupiter is classified as a gas giant along with Saturn,...
approximately 107 light-year
Light-year
A light-year, also light year or lightyear is a unit of length, equal to just under 10 trillion kilometres...
s 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 Cetus
Cetus
Cetus is a constellation. Its name refers to Cetus, a sea monster in Greek mythology, although it is often called 'the whale' today. Cetus is located in the region of the sky that contains other water-related constellations such as Aquarius, Pisces, and Eridanus.-Ecliptic:Although Cetus is not...
. The planet orbits the yellow subgiant 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 11964
HD 11964
HD 11964 is a yellow subgiant star approximately 107 light-years away in the constellation of Cetus. The star is more massive and luminous than our Sun and is barely visible to the naked eye. A wide binary companion star was discovered in 2000...
in a nearly-circular orbit, taking over 5 years to complete a revolution around the star at a distance of 3.34 astronomical unit
Astronomical unit
An astronomical unit is a unit of length equal to about or approximately the mean Earth–Sun distance....
s.
The planet was discovered in 2005 and published as part of the Catalog of Nearby Exoplanets under the designation HD 11964 b. However since that time there has been confusion as to the designations of the planets in the HD 11964 system, leading to some sources designating this planet as "HD 11964 c
HD 11964 c
HD 11964 b is an extrasolar planet, a gas giant like Jupiter approximately 107 light-years away in the constellation of Cetus. The planet orbits the yellow subgiant star HD 11964 in a nearly-circular orbit, taking over 5 years to complete a revolution around the star at a distance of 3.34...
". In a recent review of the properties of multi-planet extrasolar planetary system
Planetary system
A planetary system consists of the various non-stellar objects orbiting a star such as planets, dwarf planets , asteroids, meteoroids, comets, and cosmic dust...
s, the discovery team has stated that the correct designation for this planet is HD 11964 b.