3I/ATLAS

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Updated on February 22, 2026

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. 29.48254 TT Pike q 1.3565053 (2000.0) P Q z -3.7890469 Peri. 128.00574 -0.96791036 -0.24579955 +/-0.0000164 Node 322.15366 -0.24888299 +0.90889717 e 6.1398620 Incl. 175.11289 -0.03473897 +0.33688057 From 7701 observations 2025 May 8-2026 Feb. 19, mean residual 0".6.

Finding Charts

Magnitudes Graph m1 = 5.5 + 5 log d + 15.0 log r(t - 5) [ ,15] ( - 2025 Nov. 13) m1 = 6.0 + 5 log d + 10.0 log r [15, ] (2025 Nov. 13 - )

The orbital elements are published on M.P.E.C. 2026-D56. The charts are made with StellaNavigator Ver.11 (AstroArts). The magnitudes graphs are made with Comet for Windows.