Current near-earth comets.

Currently there are three significant comets or asteroids, if we include 3I/atlas, there will be four, but there are three notable comets of ours, from the solar system that are approaching the sun and by significant we mean those that have a nucleus of more than 1 km in diameter, non-significant there may be tens of a few hundred meters in diameter. The first is Lemmon C/2025 A6, it is not interstellar, it is one of ours, it will be visible with the naked eye in the northern hemisphere and the best dates will be at the end of October and beginning of November, it will be found below the low horizon and towards the west after sunset, then we will see it through the constellations of the Lesser Lion, the Big Dipper and Botes, in the southern hemisphere observation will be more difficult, but it will be a good show. The closest approach to Earth will occur on October 21, 2025, 89 million kilometers from us and the comet promises to be a beautiful spectacle. The sun will approach the sun on November 8 at 79.2 million km. By the way, this step is estimated to alter the trajectory of this comet when it passes near the sun. Its orbital period will be shortened from about 1,350 years, which it is approximately now to about 150 years. sometimes launch them outside the solar system, although Jupiter is better at launching comets outside the solar system, by the way, and on other occasions what it does is shorten the orbital period, as in this case.

The other comet, and the one that seems to be the brightest, is Swan C/2025 A6 and they say it is going to be quite spectacular. It was discovered on September 11, 2025 and is also a long-period comet that comes from the Oort cloud, that is, it comes from very far from the outer part of the solar system. There is no data on its size, but it is believed that it will be between 1 and 10 km in diameter, I mean its nucleus. It will be millions of kilometers long, its closest approach to Earth will be on October 20, 2025. It will pass 38,900,000 km from us.

And the other comet is C/2025 K1 Atlas, it is the smallest, it is approximately 1 km in diameter, it was discovered in May 2025 by the Atlas system in Chile, that is why it is called Atlas, just like 3I/atlas, which was also discovered by this Atlas system. Its first approach to the Sun was on October 8, which is when it has its perihelion, its closest approach to the Sun, only 49,300,000 km from the Sun. They said that it would not survive approaching the sun, that it will disintegrate, but it did survive and will approach Earth on November 25, about 60 million kilometers from us. Conclusion, all these comets are a danger to the Earth, they do not come together as they seemed in many news reports, each one comes from a different side, with a different angle, with a different trajectory, with a different period and they have different histories and do not have the same origin and it is not that 3I/Atlas brings them.

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