C/2025 A3 ( Tsuchinshan )

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Updated on September 4, 2026

Profile Discovery Date January 5, 2025 Magnitude 19.6 mag Discoverer China Near Earth Object Survey Telescope (CNEOST) search program, Xuyi Observatory of Purple Mountain Observatory (Tsuchinshan) Pictures

Orbital Elements Epoch 2026 June 9.0 TT = JDT 2461200.5 T 2026 Mar. 15.63130 TT Pike q 5.7921825 (2000.0) P Q n 0.03024092 Peri. 222.36217 -0.99029349 +0.09034224 a 10.2032711 Node 322.42936 -0.02279800 -0.85523539 e 0.4323210 Incl. 9.97586 -0.13710965 -0.51030453 P 32.6 From 107 observations 2024 Dec. 25-2026 July 7, mean residual 0".4.

Magnitudes Graph m1 = 8.0 + 5 log d + 10.0 log r

The orbital elements are published on M.P.E.C. 2026-P55. The magnitudes graphs are made with Comet for Windows.