HD 142022 Ab is an
exoplanet
An exoplanet or extrasolar planet is a planet outside the Solar System. The first possible evidence of an exoplanet was noted in 1917 but was not recognized as such. The first confirmation of detection occurred in 1992. A different planet, init ...
discovered by the
radial velocity method
Doppler spectroscopy (also known as the radial-velocity method, or colloquially, the wobble method) is an indirect method for finding extrasolar planets and brown dwarfs from radial-velocity measurements via observation of Doppler shifts in t ...
by Eggenberger ''et al.'' in 2005, after finding that
HD 142022
HD 142022 is a binary star system located in the southernmost constellation of Octans. It is too faint to be visible to the naked eye, having an apparent visual magnitude of 7.70. The distance to this system is based on parallax, but i ...
A is wobbling which indicated the presence of a massive planet, with a
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 detected by the radial veloc ...
4.5 times
Jupiter
Jupiter is the fifth planet from the Sun and the List of Solar System objects by size, largest in the Solar System. It is a gas giant with a mass more than two and a half times that of all the other planets in the Solar System combined, but ...
. It has a relatively wide separation between the planet and the star of nearly 3 AU, and takes 1928 days or 5.28 years to
revolve. As is common for long-period planets, it has a relatively high eccentricity of 53±20%.
In 2023, the inclination and true mass of HD 142022 Ab were determined via
astrometry
Astrometry is a branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies. It provides the kinematics and physical origin of the Solar System and this galaxy, the Milky Way.
His ...
.
See also
*
HD 141937 b
*
HD 142415 b
HD 142415 b is an exoplanet with the semi-amplitude of 51.3 ± 2.3 m/s. This indicates the minimum mass of 1.69 Jupiter mass, an orbital period of 386.3 days, and the semi-major axis of 1.07 astronomical units based from its stellar mass. The ...
References
External links
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Exoplanets discovered in 2005
Giant planets
Octans
Exoplanets detected by radial velocity
Exoplanets detected by astrometry
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