C/2025 L1 ( ATLAS )

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Updated on January 24, 2026

Profile Discovery Date June 6, 2025 Magnitude 18.2 mag Discoverer A. Fitzsimmons (Asteroid Terrestrial-Impact Last Alert System (ATLAS) search program) Pictures

Orbital Elements Epoch 2025 Nov. 21.0 TT = JDT 2461000.5 T 2026 Jan. 12.74282 TT Pike q 1.6795525 (2000.0) P Q z -0.0008389 Peri. 341.25598 -0.77336585 -0.46588024 +/-0.0000088 Node 208.10866 -0.39903315 -0.16928277 e 1.0014089 Incl. 114.13661 -0.49262339 +0.86850385 From 71 observations 2024 Oct. 1-2026 Jan. 2, mean residual 0".6.

Finding Charts

Magnitudes Graph m1 = 10.5 + 5 log d + 10.0 log r

The orbital elements are published on M.P.E.C. 2026-A24. The charts are made with StellaNavigator Ver.11 (AstroArts). The magnitudes graphs are made with Comet for Windows.