Astronomers have found two planets similar to Jupiter, but only outwardly

Using NASA's Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers has discovered two new

extrasolar planets - TOI-5152 b and TOI-5153 b. They are the size of Jupiter, but still different. Both cosmic objects are approximately three times more massive than the largest planet in the solar system.

TESS surveys about 200,000 brightest starsnear the Sun in order to search for transiting exoplanets. During the mission, scientists have already identified more than 5,700 candidate exoplanets—TESS Objects of Interest, or TOI. Of these, 227 have already been confirmed.

A group of astronomers led by SolenUlmer-Moll of the Geneva Observatory in Switzerland recently confirmed the presence of two more TOI planets. The transit signals were identified in the light curves of two stars known as TOI-5152 and TOI-5153. The planetary nature of these signals was confirmed during subsequent observations.

The radius of TOI-5152 b is about 1.07 radiiJupiter, the planet is about three times as massive as the gas giant. The object's orbital period around its parent star is every 54.19 days at a distance of about 0.31 AU. from her. The planet's equilibrium temperature was 688 Kelvin (414.85°C). The host of TOI-5152 is a class G1 star, almost twice the size of the Sun, and is located at a distance of about 1,200 light-years from Earth. The age is estimated to be between 1.4 and 6.8 billion years.

TOI-5153 b has a mass of 3.26 Jupiter masses,and the radius is estimated to be 1.06 times the radius of the gas giant. The exoplanet's orbital period is 20.33 days, and its distance to its host star is almost 0.16 AU. Astronomers have calculated that the equilibrium temperature of TOI-5153 b is 906 K (632.85 °C). The parent star is in spectral class F8, about 40% larger than the Sun. It is approximately 5.4 billion years old. The distance to this planetary system is about 1,270 light years.

Both exoworlds are enriched in metals,and the content of heavy elements in them is consistent with the ratio of mass and metallicity of gas giants. Given that the two planets orbit moderately luminous stars, the paper's authors added that they are ideal objects for additional observations.

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