Russian astronomer Gennady Borisov, working in Crimea, announced the discovery of a comet. The object was discovered on the night of May 2 to 3 during observations in the village of Nauchny. The comet was located in the northern part of the sky, near the North Star, and waited more than two weeks for confirmation at the Minor Planet Center. It was named C/2025 J1 (Borisov).
According to Borisov, the comet moves in a parabolic orbit, almost perpendicular to the ecliptic, and its orbital period is extremely long. The closest approach to the Sun (perihelion) will occur in June 2026. By this time, the brightness of the comet will reach 17.5 stellar magnitude, which will make it visible in powerful telescopes. The size of the nucleus is estimated at 7–10 kilometers. Gennady Borisov also emphasized that the comet can only be seen with powerful telescopes.
Borisov uses a self-assembled reflecting telescope, with which he previously discovered the first interstellar comet 2I/Borisov in 2019. Today, he ranks second in the world in the number of comets discovered.
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