3I/ATLAS

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Updated on September 27, 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. 29.48373 TT Alexandersen q 1.3563250 (2000.0) P Q z -3.7886330 Peri. 128.01292 -0.96792392 -0.24574768 +/-0.0024105 Node 322.15778 -0.24883185 +0.90891132 e 6.1386177 Incl. 175.11312 -0.03472741 +0.33688022 From 3876 observations 2025 May 8-Sept. 15, 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-S35. The charts are made with StellaNavigator Ver.11 (AstroArts). The magnitudes graphs are made with Comet for Windows.