A team of astronomers led by Adriana Errico from the University of Southern Queensland in Australia reports
A newly discovered alien world has receiveddesignation HD 83443 c. The results show that this planet has a dynamic mass of about 1.5 Jupiter masses and orbits its star every 22.6 years at a distance of about 8 astronomical units.
Astronomers emphasized that HD 83443 c rotatesin an orbit with an unusually high eccentricity of 0.76. The researchers also noted that HD 83443 is an exciting, rare example of a well-characterized system containing both a hot Jupiter and a high-eccentricity giant planet.
The new discovery was made possible byanalysis of radial velocity data obtained from four instruments. Thus, astronomers used the Echelle spectrograph of University College London UCLES on the 3.9-meter Anglo-Australian Telescope (AAT), the high-resolution HIRES echelle spectrometer on the Keck telescope, the HARPS high-precision planetary search system on the 3.6-meter ESO La Silla telescope , as well as the MINERVA-Australis telescope array at Mount Kent Observatory.
Located just 133 light years fromEarth, HD 83443 is a star with twice the solar metallicity. Its age is estimated at 2.64 billion years, and its effective temperature is about 5,429 Kelvin (5,155.850 ℃). It is known that there is a hot Jupiter near HD 83443, the exoplanet HD 83443 b with a mass of about 0.41 Jupiter masses. It orbits the star approximately every three days. Now scientists have found another planet in this extrasolar system. The space object is described in detail in an article published on the arXiv preprint server.
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