C/2023 A3 ( Tsuchinshan-ATLAS )

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Updated on March 11, 2025

Profile Discovery Date January 9 and February 22, 2023 Magnitude 18.7 mag, 18.0 mag Discoverer Purple Mountain Observatory's XuYi Station, Asteroid Terrestrial-Impact Last Alert System (ATLAS) search program Pictures

Orbital Elements Epoch 2025 May 5.0 TT = JDT 2460800.5 T 2024 Sept. 27.74297 TT Pike q 0.3914903 (2000.0) P Q z -0.0002933 Peri. 308.50433 +0.36147636 +0.90078875 +/-0.0000003 Node 21.57018 +0.91853355 -0.29972257 e 1.0001148 Incl. 139.11135 -0.16009673 +0.31423878 From 7868 observations 2022 Apr. 9-2025 Feb. 22, mean residual 1".1.

Finding Charts

Magnitudes Graph m1 = -17.0 + 5 log d + 35 log r [ ,-575] ( - 2023 Mar. 2) m1 = 4.5 + 5 log d + 10.0 log r [-575,-247] (2023 Mar. 2 - 2024 Jan. 24) m1 = 6.0 + 5 log d + 7.5 log r [-247, 0] (2024 Jan. 24 - 2024 Sept.27) m1 = 23.5 + 5 log d + 60 log r(t - 9) [ 0, 19] (2024 Sept.27 - 2024 Oct. 16) m1 = 6.0 + 5 log d + 7.5 log r [ 19, 247] (2024 Oct. 16 - 2025 June 1) m1 = 4.5 + 5 log d + 10.0 log r [ 247, ] (2025 June 1 - )

The orbital elements are published on M.P.E.C. 2025-D254. The charts are made with StellaNavigator Ver.11 (AstroArts). The magnitudes graphs are made with Comet for Windows.