C/2021 S3 ( PanSTARRS )

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Updated on December 22, 2025

Profile Discovery Date September 24, 2021 Magnitude 20.1 mag Discoverer Pan-STARRS 2 telescope (Haleakala) Pictures

Orbital Elements Epoch 2025 Nov. 21.0 TT = JDT 2461000.5 T 2024 Feb. 14.66037 TT Pike q 1.3193643 (2000.0) P Q z +0.0000503 Peri. 6.83040 -0.77126221 +0.39824402 +/-0.0000002 Node 215.59499 -0.61688492 -0.65991730 e 0.9999336 Incl. 58.54970 -0.15686813 +0.63711134 From 4864 observations 2020 Dec. 6-2025 Dec. 8, mean residual 0".7.

Finding Charts

Magnitudes Graph m1 = -33 + 5 log d + 50 log r [ ,-870] ( - 2021 Sept.27) m1 = 5.0 + 5 log d + 10.0 log r [-870,-343] (2021 Sept.27 - 2023 Mar. 8) m1 = 8.3 + 5 log d + 5.0 log r(t + 15) [-343, 0] (2023 Mar. 8 - 2024 Feb. 14) m1 = 8.0 + 5 log d + 7.0 log r [ 0, ] (2024 Feb. 14 - )

The orbital elements are published on M.P.E.C. 2025-X127. The charts are made with StellaNavigator Ver.10 (AstroArts). The magnitudes graphs are made with Comet for Windows.