An international team of scientists led by the University of Liege has announced that there is a cool star around LP
LP 890-9 is a small cold star,located about 100 light years from Earth. Its mass is about 12% of the mass of the Sun, and its radius is about 15%. The temperature on the star's surface is about 2598°C. It is the second coldest star with planets discovered to date.
The first planet LP 890-9b was discovered earlierNASA's Transiting Exoplanet Exploration Satellite (TESS). It is about 30% larger than Earth and orbits the star in just 2.7 days. In a new study, scientists used the ground-based SPECULOOS telescope to refine the parameters of this planet.
These telescopes are optimized for observingdim red dwarfs with high accuracy thanks to cameras that are very sensitive in the near infrared. The results of observations not only confirmed the first - discovered using the transit method, but also showed that another planet revolves around LP 890-9.
Comparison of the solar system and the LP 890-9 star system. Image: Adeline Deward, ULiege
LP 890-9c - also belongs to the class of super-Earths.It is about 40% larger than the Earth, and the "year" on this planet lasts 8.5 days. It orbits close enough to its star, about 10 times closer than Mercury orbits the suns. Despite such a short orbit, due to weak radiation, LP 890-9c falls into a zone in which there is enough heat and light for the development of life (the habitable zone of the planet).
Planetary scientists plan to refine the composition of the star's atmosphere through future studies with the James Webb Space Telescope.
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