HD 142022 Ab is an exoplanet discovered by the radial velocity method by Eggenberger et al. in 2005 after finding that HD 142022

HD 142022

HD 142022 is a binary star system located in the southernmost constellation of Octans located at a distance of 117 ly. The primary star has a spectral type of G9V and has apparent magnitude of 7.69. Its mass is 1% less than the Sun but the radius is only 70.5%. The star is old, only 400 million...

 A is wobbling which indicated the presence of a massive planet, designating as HD 142022 Ab, with mass of 4.5 times Jupiter

Jupiter mass

Jupiter mass , is the unit of mass equal to the total mass of the planet Jupiter . Jupiter mass is used to describe masses of the gas giants, such as the outer planets and extrasolar planets. It is also used in describing brown dwarfs....

. It has a relatively wide separation between a planet and a star with nearly 3 AU, which takes 1928 days or 5.28 years to revolve. As it is typical for long-period planets, it has a relatively high eccentricity of 53±20%.