C/2021 T4 ( Lemmon )

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Updated on March 23, 2025

Profile Discovery Date October 7, 2021 Magnitude 20.2 mag Discoverer Mount Lemmon Pictures

Orbital Elements Epoch 2025 May 5.0 TT = JDT 2460800.5 T 2023 July 31.52452 TT Pike q 1.4816685 (2000.0) P Q z +0.0001818 Peri. 329.77629 +0.28346622 -0.90334366 +/-0.0000002 Node 257.89000 -0.80069067 -0.40767601 e 0.9997306 Incl. 160.77841 -0.52777017 +0.13330607 From 2196 observations 2021 Aug. 7-2025 Feb. 27, mean residual 0".9.

Finding Charts

Magnitudes Graph m1 = 7.5 + 5 log d + 10.0 log r [ , 0] ( - 2023 July 31) m1 = 6.8 + 5 log d + 15.0 log r [ 0,215] (2023 July 31 - 2024 Mar. 2) m1 = 7.2 + 5 log d + 10.0 log r(t + 200) [215, ] (2024 Mar. 2 - )

The orbital elements are published on M.P.E.C. 2025-D254. The charts are made with StellaNavigator Ver.10 (AstroArts). The magnitudes graphs are made with Comet for Windows.