21P/Giacobini-Zinner (2031)

Japanese version
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 Updated on June 4, 2026

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* Profile

* Orbital Elements

Perturbed ephemeris below is based on elements from MPEC 2025-W75.

Epoch (TT/JD) T (TT/JD)         Peri.     Node      Incl.   
2463120.50000 2463108.5593146 170.83571 194.43347  31.66280 

    e             q             a      Epoch (TT)
0.6992443     1.0692395      3.55518  2031/09/11.00

* Finding Charts

* Magnitudes Graph

        m1 =  9.0 + 5 log d + 20.0 log r(t + 8)  [   ,  0]  (             - 2031 Aug. 30)
        m1 =  9.0 + 5 log d + 16.0 log r(t + 8)  [  0,190]  (2031 Aug. 30 - 2032 Mar.  7)
        m1 = 11.5 + 5 log d + 10.0 log r         [190,   ]  (2032 Mar.  7 -             )

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The orbital elements are calculated using the Minor Planet & Comet Ephemeris Service.
The charts are made with StellaNavigator Ver.11 (AstroArts).
The magnitudes graphs are made with Comet for Windows.

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Copyright(C) Seiichi Yoshida (comet@aerith.net). All rights reserved.