C/2021 S4 ( Tsuchinshan )

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Updated on December 1, 2023

Profile Discovery Date September 29, 2021 Magnitude 20.5 mag Discoverer Hai-bin Zhao (XuYi station, Purple Mountain Observatory) Pictures

Orbital Elements Epoch 2023 Sept. 13.0 TT = JDT 2460200.5 T 2024 Jan. 2.19039 TT Rudenko q 6.6894393 (2000.0) P Q z +0.0060713 Peri. 72.85649 +0.20617832 -0.97809207 +/-0.0000028 Node 5.49218 +0.74411418 +0.13764303 e 0.9593862 Incl. 17.47915 +0.63544046 +0.15617395 >From 405 observations 2021 Sept. 8-2023 Aug. 26, mean residual 0".4.

Magnitudes Graph m1 = -7.8 + 5 log d + 25.0 log r

The orbital elements are published on M.P.E.C. 2023-Q150. The magnitudes graphs are made with Comet for Windows.