C/2025 R1 ( ATLAS )

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Updated on June 4, 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. 23.33616 TT Pike q 1.9752014 (2000.0) P Q z +0.0060399 Peri. 77.55059 +0.39725591 -0.41819205 +/-0.0000251 Node 60.39627 -0.34453451 -0.89298749 e 0.9880700 Incl. 110.02725 +0.85057845 -0.16639940 From 346 observations 2025 Sept. 3-2026 Apr. 27, 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-H170. The magnitudes graphs are made with Comet for Windows.