C/2025 A3 ( Tsuchinshan )

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Updated on March 23, 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. 15.28713 TT Pike q 5.7921511 (2000.0) P Q n 0.03026490 Peri. 222.33048 -0.99033953 +0.08983654 a 10.1978800 Node 322.43175 -0.02235986 -0.85524098 e 0.4320240 Incl. 9.97638 -0.13684903 -0.51038442 P 32.6 From 177 observations 2024 Dec. 25-2026 Feb. 17, mean residual 0".3.

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

The orbital elements are published on M.P.E.C. 2026-E44. The magnitudes graphs are made with Comet for Windows.