HD 167042 b
Encyclopedia
HD 167042 b is a gas giant
extrasolar planet
located approximately 163 light-year
s away in the constellation
of Draco
, orbiting the star
HD 167042
. The mass 1.7 MJ is only minimum since the inclination
of the orbital plane
is unknown. As it is typical for most known extrasolar planets, it orbits less than 3 AU from the parent star, hence taking less than 2000 days (5.5 years) to revolve. For this planet, it orbits at 1.30 AU and taking 413 days to revolve around the star. Unlike most exoplanets, the eccentricity of the orbit is low, only 3%.
This planet was discovered in 2007 on September 20 and published October 22. This planet was typical as it was discovered spectroscopically using the radial velocity
method.
Gas giant
A gas giant is a large planet that is not primarily composed of rock or other solid matter. There are four gas giants in the Solar System: Jupiter, Saturn, Uranus, and Neptune...
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 163 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 Draco
Draco (constellation)
Draco is a constellation in the far northern sky. Its name is Latin for dragon. Draco is circumpolar for many observers in the northern hemisphere...
, 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 167042
HD 167042
HD 167042 is a 6th magnitude K-type giant star located approximately 163 light-years away in Draco constellation. It has mass of 1.64 times that of the Sun and the age is only 2.2 billion years old...
. The mass 1.7 MJ is only minimum since the inclination
Inclination
Inclination in general is the angle between a reference plane and another plane or axis of direction.-Orbits:The inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit...
of the orbital plane
Orbital plane (astronomy)
All of the planets, comets, and asteroids in the solar system are in orbit around the Sun. All of those orbits line up with each other making a semi-flat disk called the orbital plane. The orbital plane of an object orbiting another is the geometrical plane in which the orbit is embedded...
is unknown. As it is typical for most known extrasolar planets, it orbits less than 3 AU from the parent star, hence taking less than 2000 days (5.5 years) to revolve. For this planet, it orbits at 1.30 AU and taking 413 days to revolve around the star. Unlike most exoplanets, the eccentricity of the orbit is low, only 3%.
This planet was discovered in 2007 on September 20 and published October 22. This planet was typical as it was discovered spectroscopically using the radial velocity
Doppler spectroscopy
Doppler spectroscopy, also known as radial velocity measurement, is a spectroscopic method for finding extrasolar planets. It involves the observation of Doppler shifts in the spectrum of the star around which the planet orbits....
method.