12P/Pons-Brooks (2024)

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Updated on June 29, 2025

Profile Recovery Date June 10, 2020 Magnitude 22.8 mag Recoverer M. M. Knight, C. E. Holt, Q.-Z. Ye, L. M. Feaga, M. S. P. Kelley, L. Shumar, J. Sanborn, A. Hayslip (Lowell Observatory) Pictures

Orbital Elements Epoch 2025 May 5.0 TT = JDT 2460800.5 T 2024 Apr. 21.13707 TT Payne q 0.7810702 (2000.0) P Q n 0.01378649 Peri. 199.00512 +0.14500158 -0.32936142 a 17.2253023 Node 255.85629 +0.98570086 +0.12989427 e 0.9546556 Incl. 74.19009 +0.08583907 -0.93522646 P 71.5 From 4397 observations 2023 Oct. 1-2025 Apr. 29, mean residual 0".6. Nongravitational parameters A1 = +0.61, A2 = -0.2236.

Finding Charts

Magnitudes Graph H = 12.5 G = 0.15 [ ,-840] ( - 2022 Jan. 2) m1 = 5.0 + 5 log d + 13.5 log r [-840,-276] (2022 Jan. 2 - 2023 July 20) m1 = 9.0 + 5 log d + 0.0 log r [-276,-158] (2023 July 20 - 2023 Nov. 15) m1 = 8.5 + 5 log d - 5.0 log r [-158,-100] (2023 Nov. 15 - 2024 Jan. 12) m1 = 4.6 + 5 log d + 9.5 log r [-100, 14] (2024 Jan. 12 - 2024 May 5) m1 = 4.3 + 5 log d + 11.0 log r(t + 10) [ 14, ] (2024 May 5 - 2024 Oct. 13) m1 = 5.0 + 5 log d + 13.5 log r [ 175, ] (2024 Oct. 13 - )

The orbital elements are published on M.P.E.C. 2025-J08. The charts are made with StellaNavigator Ver.10 (AstroArts). The magnitudes graphs are made with Comet for Windows.