C/2025 A3 ( Tsuchinshan )

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Updated on April 29, 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 2025 Nov. 21.0 TT = JDT 2461000.5 T 2026 Mar. 15.26623 TT Pike q 5.7921720 (2000.0) P Q n 0.03026437 Peri. 222.32871 -0.99034220 +0.08980655 a 10.1979988 Node 322.43178 -0.02233360 -0.85524127 e 0.4320286 Incl. 9.97643 -0.13683400 -0.51038921 P 32.6 From 101 observations 2024 Dec. 25-2026 Apr. 22, 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-H170. The magnitudes graphs are made with Comet for Windows.