161P/Hartley-IRAS (2026)

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Updated on July 22, 2026

Profile Recovery Date June 23 and June 25, 2026 Magnitude 18.6 mag and 18.4 mag Recoverer H. Sato (Bunkyo-ku, Tokyo, Japan), M. Masek (Institute of Physics, Czech Academy of Sciences)

Orbital Elements Perturbed ephemeris below is based on elements from MPC 53173. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2461360.50000 2461372.0086432 47.06889 1.47708 95.79096 e q a Epoch (TT) 0.8361995 1.2651613 7.72379 2026/11/16.00

Finding Charts

Magnitudes Graph m1 = 7.9 + 5 log d + 19.5 log r(t - 20) [ ,20] ( - 2026 Dec. 17) m1 = 6.3 + 5 log d + 35 log r(t - 20) [20, ] (2026 Dec. 17 - )

The orbital elements are calculated using the Minor Planet & Comet Ephemeris Service. The charts are made with StellaNavigator Ver.10 (AstroArts). The magnitudes graphs are made with Comet for Windows.