HD 47536
Encyclopedia
HD 47536 is a 5th magnitude
K-type giant star
located approximately 400 light-year
s away in the constellation
of Canis Major
. The exact mass of the star is unknown, either 1.1 or 3 MS
. As of 2007, two planets
are known in orbit around the lowest metallicity
star.
in 2002 and HD 47536 c
in 2007.
Apparent magnitude
The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere...
K-type giant 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...
located approximately 400 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 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...
. The exact mass of the star is unknown, either 1.1 or 3 MS
Solar mass
The solar mass , , is a standard unit of mass in astronomy, used to indicate the masses of other stars and galaxies...
. As of 2007, two planets
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...
are known in orbit around the lowest metallicity
Metallicity
In astronomy and physical cosmology, the metallicity of an object is the proportion of its matter made up of chemical elements other than hydrogen and helium...
star.
Planetary system
Setiawan discovered both planets around the star: HD 47536 bHD 47536 b
HD 47536 b is an extrasolar planet located approximately 396 light-years away in the constellation of Canis Major, orbiting the star HD 47536. The mass and semimajor axis are not exactly known, the mass can either be 4.96 or 9.67 MJ and semimajor axis can either be 1.61 or 2.25 AU, both depending...
in 2002 and HD 47536 c
HD 47536 c
HD 47536 c is an extrasolar planet located approximately 396 light-years away in the constellation of Canis Major, orbiting the star HD 47536. Like HD 47536 b, mass and semimajor axis are not exactly known. The mass can either be 6.98 or 13.61 MJ and semimajor axis of 3.72 or 5.20 AU, both...
in 2007.