HD 142022 Ab is an
exoplanet
An exoplanet or extrasolar planet is a planet outside the Solar System. The first confirmed detection of an exoplanet was in 1992 around a pulsar, and the first detection around a main-sequence star was in 1995. A different planet, first det ...
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 th ...
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 stellar parallax, ...
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, binary systems, nebulae, and black holes.
Minimum mass is a widely cited statistic for extrasolar planets detected by the radial velocit ...
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 Jupiter mass, mass more than 2.5 times that of all the other planets in the Solar System combined a ...
. 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 Astronomical object, celestial bodies. It provides the kinematics and physical origin of the Solar System and this galaxy, th ...
.
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 wil ...
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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