The submission to MPC comprises approximately one million observations, taken over the span of a month and a half, of over 11,000 new asteroids and more than 80,000 already-known asteroids, including some that had previously been observed but were later "lost" because their orbits were too uncertain to predict their future locations. You can interact with all of Rubin's asteroid discoveries in the Rubin Orbitviewer, which uses real data to provide an intuitive way to explore the structure of our cosmic backyard in three dimensions and in real time.
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Among the newly identified objects are 33 previously unknown near-Earth objects (NEOs), which are small asteroids and comets whose closest approach to the sun is less than 1.3 times the distance between Earth and the sun. None of the newly discovered NEOs pose a threat to Earth, and the largest is about 500 meters wide. Objects larger than 140 meters are closely tracked as they could cause significant regional damage if they impact, yet scientists estimate that only about 40% of these mid-sized NEOs have been identified so far.
Once operating fully in survey mode, Rubin is expected to reveal an additional nearly 90,000 new NEOs, some of which may be potentially hazardous, and to nearly double the number of known NEOs larger than 140 meters to around 70%. By enabling early detection and continuous monitoring of these objects, Rubin will be a powerful tool for planetary defense.
The dataset also contains roughly 380 trans-Neptunian objects (TNOs)—icy bodies orbiting beyond Neptune. Two of the newly discovered TNOs—provisionally named 2025 LS2 and 2025 MX348—have been found to be in extremely large and elongated (stretched out) orbits. At their most distant points, these two objects reach roughly 1,000 times farther away from the sun than the Earth is, placing them among the 30 most distant minor planets known.
From the article:
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