3I/ATLAS

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Updated on October 21, 2025

Profile Designation 3I/2025 N1 Discovery Date July 1, 2025 Magnitude 17.7 mag Discoverer Asteroid Terrestrial-Impact Last Alert System (ATLAS) search program Pictures

Orbital Elements Epoch 2025 Nov. 21.0 TT = JDT 2461000.5 T 2025 Oct. 29.48361 TT Rudenko q 1.3564111 (2000.0) P Q z -3.7887334 Peri. 128.01200 -0.96791746 -0.24577334 +/-0.0025414 Node 322.15838 -0.24885561 +0.90890487 e 6.1390799 Incl. 175.11315 -0.03473719 +0.33687893 From 4165 observations 2025 May 8-Oct. 5, mean residual 0".4.

Finding Charts

Magnitudes Graph m1 = 8.0 + 5 log d + 10.0 log r

The orbital elements are published on M.P.E.C. 2025-T133. The charts are made with StellaNavigator Ver.11 (AstroArts). The magnitudes graphs are made with Comet for Windows.