C/2025 R1 ( ATLAS )

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Updated on January 24, 2026

Profile Discovery Date September 3, 2025 Magnitude 19.3 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 Nov. 23.33580 TT Pike q 1.9752057 (2000.0) P Q z +0.0060276 Peri. 77.55056 +0.39725666 -0.41818910 +/-0.0000289 Node 60.39644 -0.34453319 -0.89298884 e 0.9880942 Incl. 110.02729 +0.85057864 -0.16639953 From 336 observations 2025 Sept. 3-Dec. 13, mean residual 0".5.

Magnitudes Graph m1 = 13.0 + 5 log d + 10.0 log r

The orbital elements are published on M.P.E.C. 2026-A24. The magnitudes graphs are made with Comet for Windows.