HD 129445 - AbsoluteAstronomy.com

HD 129445 is a G type

Stellar classification

In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure...

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...

found in the Circinus constellation

Circinus

The constellation Circinus is a small constellation in the southern sky, first defined in the 18th century. Its name is Latin for compass, referring to the drafting tool used for drawing circles; it should not be confused with Pyxis, a constellation that represents a mariner's...

located approximately 219 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 from the 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...

. The star has been under the Magellan Planet Search Program

Magellan Planet Search Program

The Magellan Planet Search Program is a ground based extrasolar planet search device which began gathering data in December 2002. It utilizes the MIKE echelle spectrograph mounted on the Magellan Telescopes which are twin, 6.5m Magellan II telescope located within the Las Campanas Observatory in...

observation due to its absolute visual magnitude and 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...

. The Magellan program conducted 17 doppler velocity tests

Radial velocity

Radial velocity is the velocity of an object in the direction of the line of sight . In astronomy, radial velocity most commonly refers to the spectroscopic radial velocity...

which spans a full orbital period. The results led the program to detect a planet dubbed HD 129445 b

HD 129445 b

This planet is a eccentric Jupiter gas giant discovered by the Magellan Planet Search Program in 2010....

whose readings was accurate to the Keplerian orbital model

Orbital elements

Orbital elements are the parameters required to uniquely identify a specific orbit. In celestial mechanics these elements are generally considered in classical two-body systems, where a Kepler orbit is used...

See also