C/2025 R1 ( ATLAS )

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Updated on October 5, 2025

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. 23.33766 TT Pike q 1.9751921 (2000.0) P Q z +0.0059822 Peri. 77.55250 +0.39724932 -0.41818869 +/-0.0003216 Node 60.39724 -0.34456091 -0.89298305 e 0.9881840 Incl. 110.02780 +0.85057084 -0.16643162 From 193 observations 2025 Sept. 3-Oct. 2, 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. 2025-T80. The magnitudes graphs are made with Comet for Windows.