21P/Giacobini-Zinner (2025)

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Updated on March 4, 2025

Profile

Orbital Elements Epoch 2024 Oct. 17.0 TT = JDT 2460600.5 T 2025 Mar. 25.35206 TT Rudenko q 1.0089837 (2000.0) P Q n 0.15100638 Peri. 172.92679 +0.98465984 -0.10368599 a 3.4925222 Node 195.33445 +0.12244404 +0.98360525 e 0.7111017 Incl. 32.05042 +0.12430788 -0.14754634 P 6.53 From 4322 observations 2011 May 1-2024 Oct. 21, mean residual 0".9. Nongravitational parameters A1 = +0.38, A2 = -0.1572.

Finding Charts

Magnitudes Graph m1 = 9.0 + 5 log d + 20.0 log r(t + 8) [ , 0] ( - 2025 Mar. 25) m1 = 9.0 + 5 log d + 16.0 log r(t + 8) [ 0,190] (2025 Mar. 25 - 2025 Oct. 1) m1 = 11.5 + 5 log d + 10.0 log r [190, ] (2025 Oct. 1 - )

The orbital elements are published on M.P.E.C. 2024-Y127. The charts are made with StellaNavigator Ver.11 (AstroArts). The magnitudes graphs are made with Comet for Windows.